:root{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Arial,sans-serif;color:#242d2a;background:#faf6ea;font-synthesis:none;font-size:14px;--bg:#faf6ea;--panel:#fffdf6;--canvas:#f3edda;--text:#242d2a;--muted:#66634f;--line:#e6dfc9;--accent:#47654e;--accent-soft:#ebecd9;--soft:#f4efdf;--shadow:0 8px 36px #26362906;--sidebar:#fdfaf0}*{box-sizing:border-box}html,body{overflow-x:hidden}body{margin:0}button,select{font:inherit}button{cursor:pointer}button,select{color:inherit}button:disabled{cursor:default;opacity:.4}button:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:3px solid #47654e;outline-offset:4px}button{border:0;background:none}svg{display:block;flex-shrink:0}a{color:var(--accent)}.dark{--bg:#171e1b;--panel:#202a25;--canvas:#1b2420;--text:#e7eee5;--muted:#9ba99e;--line:#36443b;--accent:#b2c99f;--accent-soft:#344534;--soft:#29362d;--shadow:none;--sidebar:#1b231e;color:var(--text);background:var(--bg)}.shell{display:grid;grid-template-columns:218px minmax(0,1fr);min-height:100vh;min-height:100dvh}.sidebar{background:var(--sidebar);border-inline-end:1px solid var(--line);padding:31px 21px 24px;display:flex;flex-direction:column;position:fixed;inset-block:0;inset-inline-start:0;width:218px;z-index:3}.brand{display:flex;align-items:center;gap:10px;font-size:23px;font-weight:690;letter-spacing:-1px}.brand-mark{width:35px;height:35px;border-radius:11px;background:var(--accent);color:var(--panel);display:grid;place-items:center}.brand-mark svg{width:24px;height:24px}.lab{margin:10px 0 0 45px;color:var(--muted);font-size:9px;letter-spacing:1.5px;text-transform:uppercase}.sidebar-label{font-size:10px;text-transform:uppercase;letter-spacing:1.7px;font-weight:600;color:var(--muted);margin:56px 13px 16px}.nav{display:grid;gap:7px}.nav-button{display:flex;align-items:center;gap:12px;text-align:start;width:100%;padding:14px 12px;border-radius:9px;color:var(--muted);font-size:12px;font-weight:550;transition:background .15s,color .15s}.nav-button:hover{background:var(--soft);color:var(--text)}.nav-button.active{background:var(--accent-soft);color:var(--accent)}.nav-number{font-size:10px;opacity:.65;font-variant-numeric:tabular-nums}.nav-button svg{width:18px;height:18px}.nav-separator{height:1px;background:var(--line);margin:23px 12px}.sidebar-bottom{margin-top:auto;padding:22px 12px 0;color:var(--muted)}.sidebar-bottom .tiny{line-height:1.7;margin:10px 0 0}.lab-signature{font-size:10px;letter-spacing:1.6px;text-transform:uppercase}.sidebar-progress{height:3px;background:var(--line);border-radius:10px;margin:13px 0 9px}.sidebar-progress span{display:block;background:var(--accent);height:100%;border-radius:10px;transition:width .3s}.sidebar-bottom .progress-caption{display:flex;justify-content:space-between;font-size:10px}.main{grid-column:2;min-width:0}.topbar{height:77px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;padding:0 38px;gap:16px}.breadcrumb{display:flex;align-items:center;gap:13px;color:var(--muted);font-size:11px}.breadcrumb strong{color:var(--text);font-weight:500}.breadcrumb .slash{opacity:.35}.top-actions{display:flex;gap:14px;align-items:center}.locale-control{display:flex;align-items:center;gap:7px;color:var(--muted)}.locale-control svg{width:15px;height:15px}.locale-control select{background:transparent;border:0;font-size:11px;max-width:145px;padding:8px 2px;cursor:pointer}.locale-control select option{background:var(--panel);color:var(--text)}.icon-button{width:33px;height:33px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;background:var(--panel);color:var(--muted)}.icon-button svg{width:16px;height:16px}.status-dot{width:5px;height:5px;background:#7e9a70;border-radius:50%;display:inline-block;margin-inline-end:5px}.version-badge{font-size:9px;padding:6px 8px;border:1px solid var(--line);border-radius:5px;color:var(--muted);letter-spacing:.5px}.workspace{max-width:1700px;padding:31px 38px 22px;margin:auto}.module-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:24px}.eyebrow{text-transform:uppercase;letter-spacing:1.9px;font-size:9px;color:var(--accent);font-weight:650;margin:0 0 10px}.module-heading h1{font-family:Georgia,Times New Roman,serif;font-size:36px;font-weight:400;letter-spacing:-1px;line-height:1.15;margin:0 0 9px}.subtitle{font-size:12px;color:var(--muted);line-height:1.6;margin:0;max-width:690px}.module-count{color:var(--muted);font-size:11px;white-space:nowrap;padding-bottom:4px}.module-count b{font-size:20px;color:var(--accent);font-weight:400;margin-inline-end:4px}.lab-grid{display:grid;grid-template-columns:minmax(0,1fr) 283px;gap:18px}.scene-card{background:var(--canvas);border:1px solid var(--line);border-radius:15px;position:relative;min-height:444px;overflow:hidden;box-shadow:var(--shadow)}.scene-card:after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.14;background-image:radial-gradient(var(--muted) .55px,transparent .55px);background-size:19px 19px;mask-image:linear-gradient(transparent 55%,#000)}.scene-header{position:absolute;inset-block-start:18px;inset-inline:20px;z-index:2;display:flex;justify-content:space-between;align-items:flex-start;gap:10px;pointer-events:none}.molecule-select{display:flex;background:var(--panel);border:1px solid var(--line);padding:4px;border-radius:9px;pointer-events:auto;max-width:100%;gap:2px;box-shadow:0 2px 10px #26362904}.molecule-select button{font-size:10px;padding:8px 9px;border-radius:6px;color:var(--muted)}.molecule-select button.active{color:var(--accent);background:var(--accent-soft)}.scene-tag{color:var(--accent);font-size:10px;background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:8px 11px;display:flex;align-items:center;gap:7px}.scene-tag svg{width:12px;height:12px}.scene-toolbar{display:flex;flex-direction:column;gap:7px;pointer-events:auto}.scene-toolbar .icon-button{border-radius:8px;width:32px;height:32px}.scene-toolbar button.active{color:var(--accent);background:var(--accent-soft)}#scene{position:absolute;inset:0;z-index:1;direction:ltr;touch-action:none}#scene canvas{display:block;width:100%;height:100%;outline:none}#scene .webgl-error{padding:100px 40px;text-align:center;color:var(--muted)}.scene-footer{position:absolute;z-index:2;inset-inline:20px;inset-block-end:18px;display:flex;justify-content:space-between;align-items:flex-end;gap:16px;pointer-events:none}.scene-hint{font-size:9px;line-height:1.7;color:var(--muted)}.scene-hint span{display:flex;align-items:center;gap:6px}.scene-hint svg{width:11px;height:11px}.axis-mark{font-size:9px;letter-spacing:2px;color:var(--muted);padding:7px 9px;border-inline-start:1px solid var(--line);white-space:nowrap}.atom-legend{display:flex;gap:12px;flex-wrap:wrap;margin-top:9px;font-size:9px;color:var(--muted)}.atom-legend span{display:flex;gap:5px;align-items:center}.atom-legend i{width:6px;height:6px;border-radius:50%;background:var(--atom);box-shadow:0 0 0 1px #9ba49b35}.lesson-panel{background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:24px 23px;display:flex;flex-direction:column;box-shadow:var(--shadow);min-width:0}.lesson-kicker{display:flex;justify-content:space-between;align-items:center;gap:7px;font-size:9px;letter-spacing:1.3px;text-transform:uppercase;color:var(--muted)}.lesson-number{display:grid;place-items:center;width:25px;height:25px;border:1px solid var(--line);border-radius:50%;letter-spacing:0;color:var(--accent)}.lesson-panel h2{font-family:Georgia,Times New Roman,serif;font-weight:400;font-size:24px;line-height:1.18;margin:23px 0 14px;letter-spacing:-.4px}.lesson-body{font-size:12px;line-height:1.85;color:var(--muted);margin:0}.insight-box{background:var(--soft);border-radius:8px;padding:14px;margin:20px 0;display:flex;gap:10px;align-items:flex-start}.insight-box svg{height:14px;width:14px;color:var(--accent);margin-top:1px}.insight-box p{margin:0;line-height:1.6;font-size:10px;color:var(--accent)}.fact-list{margin-top:auto;border-top:1px solid var(--line);padding-top:6px}.fact{display:flex;justify-content:space-between;gap:10px;align-items:baseline;padding:10px 0 0;font-size:10px;line-height:1.5;color:var(--muted)}.fact strong{font-weight:550;color:var(--text);text-align:end}.step-track{margin:22px 0 0;display:flex;gap:7px;align-items:stretch}.step-tab{position:relative;flex:1;min-width:0;border-top:2px solid var(--line);text-align:start;padding:13px 8px 11px 0;display:flex;align-items:flex-start;gap:9px;color:var(--muted);font-size:10px;line-height:1.5}.step-tab.active{border-color:var(--accent);color:var(--accent)}.step-tab.complete{border-color:#a8bca0}.step-tab .num{font-size:9px;opacity:.6;padding-top:1px}.step-tab .step-title{font-weight:500}.playback{display:flex;justify-content:space-between;align-items:center;gap:15px;padding-top:13px}.playback-info{display:flex;gap:8px;align-items:center;font-size:10px;color:var(--muted)}.playback-info svg{height:14px;width:14px}.playback-controls{display:flex;align-items:center;gap:9px}.btn{display:flex;justify-content:center;align-items:center;gap:8px;padding:11px 17px;min-height:38px;border-radius:8px;font-size:11px;background:var(--panel);border:1px solid var(--line);color:var(--text);font-weight:550}.btn svg{height:14px;width:14px}.btn.primary{background:var(--accent);color:var(--panel);border-color:var(--accent)}.btn.ghost{background:none;border-color:transparent;color:var(--muted)}.play-button{height:37px;width:37px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;color:var(--accent);background:var(--panel)}.play-button svg{width:13px;height:13px}.footnote{margin:28px 0 0;padding-top:16px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:16px;color:var(--muted);font-size:9px;line-height:1.5}.footnote span{display:flex;align-items:center;gap:6px}.footnote svg{width:12px;height:12px}.face-toggle{display:flex;margin:0 0 16px;gap:5px}.face-toggle button{font-size:10px;padding:8px 10px;border:1px solid var(--line);border-radius:6px}.face-toggle button.active{background:var(--accent-soft);color:var(--accent);border-color:var(--accent)}.newman{position:absolute;inset-inline-start:18px;inset-block-end:70px;width:122px;z-index:2;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:8px;text-align:center;direction:ltr}.newman svg{width:102px;height:108px}.newman p{font-size:8px;color:var(--muted);line-height:1.4;margin:0}.review-label{color:var(--muted);font-size:9px;margin-top:7px}.quiz-layout{display:grid;grid-template-columns:minmax(0,1fr) 283px;gap:18px}.quiz-card{border:1px solid var(--line);border-radius:15px;background:var(--panel);padding:33px;min-height:477px}.quiz-top{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:10px}.quiz-progress{width:105px;display:flex;gap:4px}.quiz-progress i{height:4px;flex:1;background:var(--line);border-radius:3px}.quiz-progress i.done{background:var(--accent)}.quiz-card h2{font-family:Georgia,Times New Roman,serif;font-size:27px;font-weight:400;line-height:1.3;max-width:650px;margin:33px 0 26px}.quiz-options{display:grid;gap:10px}.quiz-option{padding:14px 17px;border:1px solid var(--line);border-radius:9px;text-align:start;display:flex;align-items:center;gap:13px;font-size:12px;line-height:1.5}.quiz-option:hover{background:var(--soft)}.quiz-option.selected{border-color:var(--accent);background:var(--accent-soft)}.quiz-option.correct{border-color:#669454;background:var(--accent-soft)}.quiz-option.wrong{border-color:#b87766;background:#b8776610}.option-letter{width:23px;height:23px;display:grid;place-items:center;border:1px solid var(--line);border-radius:6px;font-size:10px;color:var(--muted);flex-shrink:0}.quiz-feedback{margin-top:21px;padding:15px 18px;border-radius:8px;background:var(--soft);font-size:12px;line-height:1.7}.quiz-feedback strong{color:var(--accent);display:block;margin-bottom:5px}.quiz-footer{display:flex;justify-content:flex-end;margin-top:22px}.quiz-aside{border:1px solid var(--line);border-radius:15px;background:var(--canvas);padding:26px;display:flex;flex-direction:column;justify-content:space-between}.quiz-aside h3{font-family:Georgia,Times New Roman,serif;font-size:24px;font-weight:400;margin:25px 0 15px}.quiz-aside p{font-size:12px;color:var(--muted);line-height:1.9}.quiz-orb{width:150px;height:150px;margin:10px auto 25px;position:relative}.quiz-orb i{position:absolute;border:1px solid var(--accent);border-radius:50%;inset:12px;transform:rotateX(55deg) rotate(30deg)}.quiz-orb i:nth-child(2){transform:rotateY(55deg) rotate(30deg)}.quiz-orb i:nth-child(3){transform:rotateY(-55deg) rotate(30deg)}.quiz-orb:after{content:"";position:absolute;width:24px;height:24px;background:var(--accent);border-radius:50%;inset:63px;box-shadow:0 0 40px #47654e30}.score-number{font-family:Georgia,serif;font-size:90px;color:var(--accent);margin:35px 0 10px}.quiz-complete{text-align:center;padding:10px 10px 30px}.quiz-complete .btn{margin:30px auto 0}.quiz-complete h2{margin:20px auto}.quiz-complete p{color:var(--muted);line-height:1.8}[dir=rtl] .directional{transform:scaleX(-1)}[dir=rtl] .step-tab{padding:13px 0 11px 8px}[dir=rtl] .lab{margin:10px 45px 0 0}[dir=rtl] .eyebrow,[dir=rtl] .sidebar-label,[dir=rtl] .lesson-kicker,[dir=rtl] .lab-signature{letter-spacing:0}[dir=rtl] .module-heading h1,[dir=rtl] .lesson-panel h2,[dir=rtl] .quiz-card h2{font-family:Tahoma,Arial,sans-serif;letter-spacing:0;line-height:1.5}@media(min-width:1550px){.scene-card{min-height:520px}.lesson-panel{padding:29px}.module-heading{margin-bottom:30px}.workspace{padding-top:38px}}@media(max-width:1180px){.shell{grid-template-columns:180px minmax(0,1fr)}.sidebar{width:180px;padding:28px 13px 20px}.brand{font-size:21px}.lab{font-size:8px;letter-spacing:1px}.workspace{padding:27px 24px 20px}.topbar{padding:0 24px}.lab-grid,.quiz-layout{grid-template-columns:minmax(0,1fr) 248px}.lesson-panel{padding:21px 18px}.molecule-select button{font-size:9px;padding:8px 6px}.scene-card{min-height:450px}.breadcrumb{font-size:10px}.version-badge{display:none}.module-heading h1{font-size:33px}}@media(max-width:940px){.shell{display:block}.sidebar{position:static;width:auto;border-inline-end:0;border-bottom:1px solid var(--line);padding:14px 20px}.brand{font-size:21px}.brand-mark{width:30px;height:30px}.lab,.sidebar-label,.sidebar-bottom,.nav-separator{display:none}.nav{display:flex;gap:5px;overflow-x:auto;margin-top:14px}.nav-button{white-space:nowrap;font-size:11px;padding:10px}.nav-number{display:none}.main{display:block}.topbar{height:57px}.workspace{padding-top:25px}.lab-grid{grid-template-columns:minmax(0,1fr) 265px}.scene-card{min-height:440px}.module-heading h1{font-size:31px}.footnote{margin-top:20px}}@media(max-width:680px){.sidebar{padding:14px 14px 10px}.nav-button{font-size:10px;gap:7px}.nav-button svg{width:15px;height:15px}.topbar{padding:0 16px}.breadcrumb{font-size:9px;gap:7px}.top-actions{gap:9px}.locale-control select{max-width:98px}.workspace{padding:22px 14px}.module-heading{margin-bottom:20px}.module-heading h1{font-size:29px}.module-count{display:none}.subtitle{font-size:11px}.lab-grid,.quiz-layout{display:flex;flex-direction:column;gap:14px}.scene-card{min-height:390px}.lesson-panel{padding:20px}.lesson-panel h2{margin:12px 0 10px;font-size:24px}.lesson-body{font-size:12px}.insight-box{margin:14px 0}.fact-list{display:flex;flex-wrap:wrap;gap:15px}.fact{flex:1;display:block;font-size:10px}.fact strong{display:block;text-align:start;margin-top:4px}.step-tab{font-size:9px;gap:5px;padding-top:10px}.step-tab .num{display:none}.step-track{gap:5px;margin-top:20px}.playback-info{font-size:9px}.btn{font-size:10px;padding:10px 13px}.playback-controls{gap:3px}.footnote{font-size:8px;align-items:flex-start}.footnote span{align-items:flex-start}.scene-header{inset-inline:12px;inset-block-start:12px}.scene-footer{inset-inline:14px;inset-block-end:14px}.molecule-select button{font-size:9px;padding:8px}.scene-toolbar{gap:6px}.scene-toolbar .icon-button{width:29px;height:29px}.quiz-card{padding:23px}.quiz-card h2{font-size:24px}.quiz-aside{display:none}.atom-legend{gap:9px}.newman{width:105px;inset-inline-start:12px}.newman svg{width:87px;height:94px}.axis-mark{display:none}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}.breadcrumb>svg{width:14px;height:14px}.tiny{font-size:10px}.nav-button span{line-height:1.5}.quiz-option:disabled{opacity:1}.quiz-option>svg{width:18px;height:18px;margin-inline-start:auto}.score-number small{font-size:25px;color:var(--muted)}.scene-card:fullscreen{background:var(--canvas);border:0;border-radius:0}.scene-card:fullscreen #scene{position:absolute;inset:0}.locale-control select{font-family:inherit}.playback-info{max-width:52%;line-height:1.7}.scene-tag{max-width:100%;line-height:1.5}.dark .btn.primary,.dark .brand-mark{color:#1b231e}.dark .quiz-option.correct{background:#344534}.sidebar{padding-bottom:max(24px,env(safe-area-inset-bottom))}body{padding-top:env(safe-area-inset-top)}.scene-toolbar .icon-button:hover{color:var(--accent);border-color:var(--accent)}[dir=rtl] .scene-footer,[dir=rtl] .newman p,[dir=rtl] .step-track{direction:rtl}html[lang=hi] .module-heading h1,html[lang=hi] .lesson-panel h2,html[lang=zh-Hans] .module-heading h1,html[lang=ko] .module-heading h1{line-height:1.4;letter-spacing:0}.footnote bdi{white-space:nowrap}@media(max-width:680px){.playback-info{display:none}.playback{justify-content:flex-end}.scene-card{min-height:370px}.molecule-select{flex-wrap:wrap;max-width:calc(100vw - 98px)}.footnote{flex-wrap:wrap}}.variant-select{display:flex;flex-wrap:wrap;gap:6px;margin:-8px 0 16px}.variant-select button{font-size:11px;line-height:1.3;padding:9px 13px;min-height:36px;border:1px solid var(--line);border-radius:20px;background:var(--panel);color:var(--muted)}.variant-select button:hover{color:var(--text);border-color:var(--accent)}.variant-select button.active{color:var(--accent);background:var(--accent-soft);border-color:var(--accent)}.unit-panel{margin-top:24px;background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:22px 23px;box-shadow:var(--shadow);min-width:0}.unit-panel:empty{display:none}.sidebar{overflow-y:auto}.sidebar>.nav{flex-shrink:0}.unit-panel button,.scene-tag,.step-title{overflow-wrap:anywhere}@media(max-width:680px){.playback-controls{flex-wrap:wrap;justify-content:flex-end}.step-track{flex-wrap:wrap}.step-tab{flex:1 1 22%;min-width:0}.fact{flex-basis:40%}}.nav-button.locked{opacity:.55}.nav-button.locked>svg:last-child{margin-inline-start:auto;width:13px;height:13px}@media(max-width:680px){.variant-select{margin-top:-4px}.variant-select button{font-size:10px;padding:8px 11px}.unit-panel{padding:18px 16px}}#scene canvas:focus-visible{outline:3px solid #47654e;outline-offset:-3px}.dark button:focus-visible,.dark select:focus-visible,.dark [tabindex]:focus-visible,.dark #scene canvas:focus-visible{outline-color:#b2c99f}.footnote{flex-wrap:wrap}.btn,.od-btn,.pl-row,.chip,.od-tabs button,.od-tabs a,.pl-plan{transition:transform .12s cubic-bezier(.2,0,0,1),background-color .15s,border-color .15s,box-shadow .15s,color .15s;-webkit-tap-highlight-color:transparent}.btn:not(:disabled):active,.od-btn:not(:disabled):active,.chip:not(:disabled):active,.pl-plan:active{transform:scale(.97)}.pl-row:not(:disabled):active{transform:scale(.985)}.od-tabs button:active svg,.od-tabs a:active svg{transform:scale(.9);transition:transform .1s}@media(hover:hover){.pl-row:not(.locked):not(:disabled):hover{border-color:var(--accent)}}.btn[aria-busy=true],.od-btn[aria-busy=true],.od-btn:disabled[data-od-checkout]{cursor:progress;opacity:.7}.od-fb{animation:od-fb-pop .16s cubic-bezier(.2,0,0,1)}.od-fb.no{animation-name:od-fb-nudge}@keyframes od-fb-pop{0%{opacity:0;transform:translateY(4px) scale(.98)}to{opacity:1;transform:none}}@keyframes od-fb-nudge{0%{opacity:0;transform:translate(0)}35%{opacity:1;transform:translate(-3px)}70%{transform:translate(2px)}to{transform:none}}.od-mtop{display:flex;align-items:center;justify-content:space-between;gap:8px;margin:-4px -6px 8px}.od-tabview .od-mbrand{min-height:44px;padding:4px 6px;margin:0}.od-theme-btn{display:inline-grid;place-items:center;inline-size:44px;block-size:44px;padding:0;border:1px solid var(--line);border-radius:12px;background:var(--panel);color:var(--text);transition:transform .12s cubic-bezier(.2,0,0,1),border-color .15s}.od-theme-btn:hover{border-color:var(--accent)}.od-theme-btn:active{transform:scale(.94)}.od-theme-btn:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.od-topend{display:flex;align-items:center;gap:8px;margin-inline-start:auto}.od-topend .od-theme-btn{border-radius:999px;flex:none}.od-topend .od-account-link{display:inline-flex;align-items:center;justify-content:center;block-size:44px;min-height:44px;padding:0 16px;border-radius:999px;box-sizing:border-box;line-height:1}body.od-has-tabs .od-account-float{display:none!important}.pl-head .pl-plan{display:none}@media(min-width:1024px){.od-mtop{display:none}}.od-appbar-brand{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 8px;margin-inline-start:-8px}@media(prefers-reduced-motion:reduce){.btn,.od-btn,.pl-row,.chip,.od-tabs button,.od-tabs a,.pl-plan{transition:none}.btn:active,.od-btn:active,.chip:active,.pl-plan:active,.pl-row:active,.od-tabs button:active svg,.od-tabs a:active svg{transform:none}.od-fb{animation:none}}.od-theme-btn{position:relative}.od-theme-a{position:absolute;inset-block-end:5px;inset-inline-end:6px;font-size:9px;line-height:1;font-weight:800;color:var(--accent)}.od-theme-menu{position:fixed;z-index:1000;display:grid;gap:2px;padding:6px;border-radius:14px;background:var(--panel);border:1px solid var(--line);box-shadow:0 12px 32px #0000002e;color:var(--text)}.od-theme-menu button{display:flex;align-items:center;gap:12px;min-block-size:48px;padding:8px 12px;border-radius:10px;text-align:start;color:var(--text)}.od-theme-menu button:hover,.od-theme-menu button:focus-visible{background:var(--soft)}.od-theme-menu button[aria-checked=true]{background:var(--accent-soft)}.od-theme-menu span{flex:1;display:flex;flex-direction:column;gap:2px}.od-theme-menu b{font-size:15px}.od-theme-menu small{font-size:12.5px;color:var(--muted);line-height:1.3}.od-theme-menu i{font-style:normal;font-weight:800;color:var(--accent)}.od-test-banner{background:#f6e3b4;color:#3d3217;text-align:center;font:600 12px/1.4 system-ui,sans-serif;padding:6px 10px;border-bottom:1px solid #d9b25c}.od-account-link{font-size:15px;font-weight:600;color:var(--accent);padding:8px 12px;border:1px solid var(--line);border-radius:20px;background:var(--panel);white-space:nowrap}.od-account-link:hover{border-color:var(--accent)}.od-account-float{position:fixed;top:36px;inset-inline-end:12px;z-index:30}.od-link{font:inherit;color:var(--accent);text-decoration:underline;padding:2px;min-height:24px}.od-btn{font-size:15px;font-weight:600;padding:12px 18px;min-height:44px;border-radius:10px;border:1px solid var(--line);background:var(--panel);color:var(--text)}.od-btn:hover{border-color:var(--accent)}.od-btn-primary{background:var(--accent);color:var(--panel);border-color:var(--accent)}.dark .od-btn-primary{color:#17201a}.od-btn-danger{border-color:#b75c46;color:#a24a35}.dark .od-btn-danger{color:#e8a08c;border-color:#b75c46}.od-pricing{margin:34px 0 8px}.od-pricing h2{font-family:Georgia,serif;font-weight:400;font-size:28px;margin:0 0 16px}.od-plans{display:grid;grid-template-columns:1fr 1fr 1.2fr;gap:14px;align-items:stretch}.od-plan{border:1px solid var(--line);border-radius:15px;background:var(--panel);padding:20px;display:flex;flex-direction:column;gap:8px}.od-plan h3{margin:0;font-size:15px}.od-plan p{margin:0;font-size:15px;line-height:1.5;color:var(--muted)}.od-plan .od-btn{margin-top:auto}.od-plan-hero{border:2px solid var(--accent);background:var(--accent-soft)}.od-plan-hero p{color:var(--text)}.od-badge{font-size:12px!important;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--accent)!important}.od-price{font-family:Georgia,serif;font-size:34px!important;color:var(--text)!important}.od-price span{font:15px system-ui,sans-serif;color:var(--text)}.od-anchor,.od-trust{font-size:15px;color:var(--muted);margin:14px 0 0}.od-trust{margin-top:6px}.od-error{color:#a24a35;font-size:15px;margin:10px 0 0}.dark .od-error{color:#e8a08c}.od-dialog-host{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:16px}.od-backdrop{position:absolute;inset:0;background:#10180f99}.od-dialog{position:relative;background:var(--bg);color:var(--text);border-radius:16px;padding:26px;width:min(720px,100%);max-height:calc(100vh - 32px);max-height:calc(100dvh - 32px);overflow:auto;box-shadow:0 20px 60px #0006}.od-dialog h2{font-family:Georgia,serif;font-weight:400;font-size:26px;margin:0 28px 10px 0}.od-dialog p{line-height:1.55}.od-x{position:absolute;top:10px;inset-inline-end:12px;font-size:26px;line-height:1;width:44px;height:44px;color:var(--muted)}.od-lede{margin:0 0 14px;color:var(--muted)}.od-muted,.od-small{color:var(--muted)}.od-small{font-size:15px}.od-row{display:flex;gap:10px;flex-wrap:wrap}.od-notice{background:var(--accent-soft);border-radius:10px;padding:10px 14px}.od-sticky{position:fixed;inset-inline:0;bottom:0;z-index:20;background:var(--panel);border-top:1px solid var(--line);text-align:center;font-size:15px;padding:10px 12px calc(10px + env(safe-area-inset-bottom));color:var(--text)}.od-sticky[hidden]{display:none}body.od-has-sticky{padding-bottom:48px}.od-toast{text-wrap:balance;position:fixed;inset-inline:12px;top:calc(64px + env(safe-area-inset-top));bottom:auto;margin:0 auto;max-width:480px;z-index:110;background:#243b2b;color:#fff;border-radius:12px;padding:12px 16px;font-size:14px;text-align:center;pointer-events:none}.od-toast[hidden]{display:none}body.od-toast-visible:not(.od-landing-on) .od-tabview{inset-block-start:var(--od-toast-clearance)}.od-hero{padding:6px 0 26px}.od-hero h1{font-family:Georgia,serif;font-weight:400;font-size:44px;line-height:1.08;margin:0 0 12px;letter-spacing:-.5px}.od-hero .od-sub{font-size:17px;line-height:1.5;max-width:560px;margin:0 0 18px;color:var(--text)}.od-hero .od-cta-row{display:flex;align-items:center;gap:18px;flex-wrap:wrap}.od-hero .od-btn-primary{font-size:15px;padding:14px 22px}.od-hero .od-strip{margin:14px 0 0;font-size:13px;color:var(--muted)}.od-endcard{margin-top:24px;background:var(--panel);border:1px solid var(--accent);border-radius:15px;padding:20px 22px}.od-endcard h3{margin:0 0 6px;font-family:Georgia,serif;font-weight:400;font-size:22px}.od-endcard p{margin:0 0 12px;color:var(--muted)}.od-capture{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.od-capture input{flex:1 1 200px;min-height:44px;padding:0 12px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--text);font:inherit}.od-menu-toggle{display:none}@media(max-width:680px){.od-plans{grid-template-columns:1fr}.od-hero h1{font-size:32px}.od-hero .od-sub{font-size:15px}.od-hero .od-btn-primary{width:100%}.od-menu-toggle{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;padding:9px 14px;min-height:44px;border:1px solid var(--line);border-radius:20px;background:var(--panel)}.brand-row{display:flex;align-items:center;justify-content:space-between}.sidebar-menu{display:none}.menu-open .sidebar-menu{display:block}.menu-open .sidebar-menu .nav{display:grid;overflow:visible}.menu-open .sidebar-menu .nav-button{white-space:normal;font-size:13px;padding:12px}.od-account-float{top:34px}}@media(min-width:681px){.sidebar-menu{display:contents}.brand-row{display:block}}@media(min-width:941px){.od-sticky{inset-inline-start:218px}}@media(min-width:681px)and (max-width:1180px)and (min-width:941px){.od-sticky{inset-inline-start:180px}}.od-price-lede{margin:-6px 0 14px;color:var(--muted);font-size:15px}.od-sem{border:0;margin:0 0 16px;padding:0;min-inline-size:0}.od-sem legend{padding:0;margin:0 0 8px;font-size:15px;font-weight:600;color:var(--text)}.od-sem-opts{display:grid;grid-template-columns:1fr 1fr;gap:10px;max-inline-size:520px}.od-sem-opt{position:relative;display:block;cursor:pointer}.od-sem-opt input{-webkit-appearance:none;appearance:none;position:absolute;opacity:0;inset:0;inline-size:100%;block-size:100%;margin:0;cursor:pointer;z-index:1}.od-sem-opt span{display:flex;flex-direction:column;gap:2px;min-block-size:56px;padding:10px 14px 10px 40px;border:1.5px solid var(--line);border-radius:14px;background:var(--panel);position:relative;transition:border-color .15s,background .15s}.od-sem-opt span:before{content:"";position:absolute;inset-inline-start:14px;top:50%;inline-size:16px;block-size:16px;margin-top:-8px;border-radius:50%;border:1.5px solid var(--muted);background:var(--panel)}.od-sem-opt b{font-size:16px;font-weight:650}.od-sem-opt small{font-size:14px;color:var(--muted)}.od-sem-opt input:checked+span{border-color:var(--accent);background:var(--accent-soft)}.od-sem-opt input:checked+span:before{border-color:var(--accent);box-shadow:inset 0 0 0 4px var(--panel);background:var(--accent)}.od-sem-opt input:focus-visible+span{outline:2px solid var(--accent);outline-offset:2px}.od-sem-what{margin:14px 0 0;font-size:15px;color:var(--text)}.od-sem-what summary{cursor:pointer;color:var(--accent);font-weight:600;min-block-size:44px;display:flex;align-items:center}.od-sem-what p{margin:0 0 8px;line-height:1.5}.od-switch-box{margin:0 0 16px;padding:14px 16px;border-radius:14px;background:var(--accent-soft);border:1px solid var(--accent)}.od-switch-box p{margin:0 0 10px}.od-switch-box .od-small{margin:12px 0 0}.od-plan-row{padding:12px 0;border-block-end:1px solid var(--line)}.od-plan-row:last-of-type{border-block-end:0}.od-plan-row .od-row{margin:6px 0 8px}.od-school-code{font-size:14px;text-align:center;margin:16px 0 0}.od-school-code a{display:inline-block;padding:8px;min-height:40px}.od-promo-expired>.od-btn{margin:4px 0 12px}.od-promo-expired .od-small{margin-bottom:16px}.od-login{margin-top:18px;padding-top:14px;border-top:1px solid var(--line, #e5e5e5)}.od-login p{margin:0 0 6px}.od-login-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}.od-login-row input{flex:1 1 200px;min-height:44px;padding:0 12px;border:1px solid var(--line, #ccc);border-radius:10px;background:var(--bg, #fff);color:inherit;font:inherit}.od-login-row .od-btn{min-height:44px}.od-unlocking{position:fixed;left:50%;top:16px;transform:translate(-50%);z-index:1000;display:flex;align-items:center;gap:10px;background:#111;color:#fff;padding:12px 16px;border-radius:12px;font-size:15px;box-shadow:0 6px 24px #0003;max-width:calc(100vw - 32px)}.od-unlocking[hidden]{display:none}.od-spin{width:16px;height:16px;border:2px solid rgba(255,255,255,.35);border-top-color:#fff;border-radius:50%;animation:od-spin .8s linear infinite;flex:none}@keyframes od-spin{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){.od-spin{animation:none}}.od-renew{margin:8px 0 0;font-size:13px;line-height:1.4;color:var(--muted)}.od-plan-row .od-row>.od-btn{flex:1 1 160px;white-space:normal}@media(max-width:420px){.od-plan-row .od-row,.od-dialog-host .od-plan-row .od-row{flex-direction:column;align-items:stretch}.od-plan-row .od-row>.od-btn{flex:none;width:100%}}.od-guarantee{margin:8px 0 0;font-size:12.5px;line-height:1.4;color:var(--pd-muted,var(--muted));text-align:center}.od-guarantee a,.od-trust a,.od-strip a{color:inherit;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:2px}.od-guarantee a:hover,.od-trust a:hover,.od-strip a:hover{color:var(--text,inherit)}.pc-offer .od-guarantee,.od-endcard .od-guarantee{text-align:left}.od-guarantee{font-size:14px;font-weight:500;color:var(--text,inherit);opacity:.82}.od-guarantee a{display:inline-flex;align-items:center;gap:5px;text-decoration:none}.od-guarantee a:before{content:"";flex:none;width:14px;height:14px;background:currentColor;-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 3l7 3v5c0 4.5-3 8.3-7 10-4-1.7-7-5.5-7-10V6z'/%3E%3Cpath d='M8.8 12.2l2.2 2.2 4.3-4.4'/%3E%3C/svg%3E") center/contain no-repeat;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 3l7 3v5c0 4.5-3 8.3-7 10-4-1.7-7-5.5-7-10V6z'/%3E%3Cpath d='M8.8 12.2l2.2 2.2 4.3-4.4'/%3E%3C/svg%3E") center/contain no-repeat}.od-guarantee a:hover{text-decoration:underline;text-underline-offset:2px}.od-trust a,.od-strip a,.od-sticky a[href="/refunds"]{font-weight:500}.od-plan-trial .od-badge-soft{color:var(--accent)!important}.od-dialog-host .od-plan.od-plan-trial{padding-top:46px}.od-dialog-host .od-plan.od-plan-trial .od-badge-soft{background:var(--pd-soft);color:var(--pd-accent)!important;border:1px solid var(--pd-accent)}.od-landing .od-plan-trial{padding-top:52px}.od-trial-pill{display:inline-block;padding:2px 9px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:12px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;vertical-align:1px}.od-trial-ended{margin:0 0 14px}.od-trial-ended p{margin:0 0 8px}.od-trial-form .od-small{margin-top:10px}.od-account-link.od-account-trial{border-color:var(--accent)!important;color:var(--accent)!important;white-space:nowrap}.od-save-card{position:fixed;right:16px;bottom:72px;z-index:105;width:min(360px,calc(100vw - 24px));background:var(--panel,#fff);color:var(--text,#1d2a22);border:1px solid var(--line,#d9e2dc);border-radius:14px;box-shadow:0 10px 30px #14281e2e;padding:14px 16px 10px;font-size:14px;animation:od-save-in .25s ease-out}.od-save-card .od-save-h{margin:0 28px 4px 0;font-weight:700;font-size:15px}.od-save-card .od-small{margin:0 0 8px}.od-login.od-save-form{margin:0;padding-top:0;border-top:0}.od-save-card .od-login-row,.od-save-box .od-login-row{margin-top:4px}.od-save-card .od-login-row{display:flex;gap:8px}.od-save-card .od-login-row input{flex:1;min-width:0}.od-save-x{position:absolute;top:6px;right:8px;border:0;background:none;font-size:22px;line-height:1;color:#5b6b61;cursor:pointer;padding:4px 8px;border-radius:8px}.od-save-x:hover{background:#eef3ef}.od-save-later{display:block;margin:6px auto 0;font-size:13px}.od-save-box{border-top:1px solid #e3e9e5;margin:12px 0;padding-top:12px}.od-save-box p{margin:0 0 6px}@media(max-width:640px){.od-save-card{left:12px;right:12px;width:auto;bottom:calc(76px + env(safe-area-inset-bottom))}}@keyframes od-save-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}@media(prefers-reduced-motion:reduce){.od-save-card{animation:none}}.od-dialog-host{--pd-bg:#faf6ea;--pd-panel:#fffdf6;--pd-text:#242d2a;--pd-muted:#66634f;--pd-ink2:#4a4a3b;--pd-line:#e6dfc9;--pd-accent:#47654e;--pd-soft:#ebecd9;--pd-on-accent:#fffdf6;--pd-serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Times New Roman",serif;position:fixed;inset:0;z-index:200;display:grid;place-items:center;padding:16px;font:15px/1.5 Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Arial,sans-serif;color:var(--pd-text)}.dark .od-dialog-host,.od-dialog-host.dark{--pd-bg:#1a211c;--pd-panel:#222b25;--pd-text:#e9eee6;--pd-muted:#a9b5a8;--pd-ink2:#c3cfc3;--pd-line:#38453b;--pd-accent:#9bbf9e;--pd-soft:#2b372e;--pd-on-accent:#14201a}.od-dialog-host[hidden]{display:none}.od-dialog-host *{box-sizing:border-box}.od-dialog-host .od-backdrop{position:absolute;inset:0;background:#10180fd9}.od-dialog-host .od-dialog{position:relative;background:var(--pd-bg);color:var(--pd-text);border-radius:18px;padding:28px 26px 24px;width:min(860px,100%);max-height:calc(100vh - 32px);max-height:calc(100dvh - 32px);overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;box-shadow:0 24px 70px #0008}.od-dialog-host .od-dialog h2{font:400 26px/1.2 var(--pd-serif);letter-spacing:-.4px;margin:0 48px 10px 0;color:var(--pd-text)}.od-dialog-host .od-dialog p{line-height:1.55;margin:0 0 10px}.od-dialog-host .od-x{position:absolute;top:10px;inset-inline-end:10px;width:44px;height:44px;font-size:26px;line-height:1;color:var(--pd-muted);background:none;border:0;border-radius:50%}.od-dialog-host .od-lede,.od-dialog-host .od-muted,.od-dialog-host .od-small{color:var(--pd-muted)}.od-dialog-host .od-lede{margin:0 0 16px}.od-dialog-host .od-small{font-size:15px}.od-dialog-host .od-pricing{margin:0}.od-dialog-host .od-plans{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;align-items:stretch}.od-dialog-host .od-plan{position:relative;display:flex;flex-direction:column;gap:8px;padding:22px 20px 20px;border:1px solid var(--pd-line);border-radius:18px;background:var(--pd-panel);box-shadow:0 14px 34px -22px #2a3a2a50}.od-dialog-host .od-plan h3{margin:0;font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--pd-muted)}.od-dialog-host .od-plan p{margin:0;font-size:15px;line-height:1.5;color:var(--pd-muted)}.od-dialog-host .od-plan-hero{border:1.5px solid var(--pd-accent);background:linear-gradient(180deg,var(--pd-soft),var(--pd-panel) 85%);padding-top:46px}.od-dialog-host .od-plan-hero h3{color:var(--pd-accent)}.od-dialog-host .od-plan .od-badge{position:absolute;top:14px;inset-inline-start:20px;inset-inline-end:auto;margin:0;padding:4px 10px;border-radius:999px;background:var(--pd-accent);color:var(--pd-on-accent)!important;font-size:12px!important;font-weight:700;letter-spacing:.08em;line-height:1.3;text-transform:uppercase;white-space:nowrap}.od-dialog-host .od-price{font:400 40px/1.05 var(--pd-serif)!important;letter-spacing:-1px;margin:4px 0 2px!important;color:var(--pd-text)!important}.od-dialog-host .od-price span{font:500 15px Inter,-apple-system,sans-serif;letter-spacing:0;color:var(--pd-muted)}.od-dialog-host .od-feats{list-style:none;margin:6px 0 16px;padding:0;display:grid;gap:9px;font-size:15px;color:var(--pd-ink2)}.od-dialog-host .od-feats li{position:relative;padding-inline-start:22px;line-height:1.4}.od-dialog-host .od-feats li:before{content:"";position:absolute;inset-inline-start:1px;top:.42em;width:10px;height:6px;border-left:2px solid var(--pd-accent);border-bottom:2px solid var(--pd-accent);transform:rotate(-48deg)}.od-dialog-host .od-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 18px;border-radius:12px;border:1px solid var(--pd-line);background:var(--pd-panel);color:var(--pd-text);font-size:15px;font-weight:600}.od-dialog-host .od-plan .od-btn{margin-top:auto;width:100%}.od-dialog-host .od-btn-primary{background:var(--pd-accent);border-color:var(--pd-accent);color:var(--pd-on-accent)}.od-dialog-host .od-btn-danger{border-color:#b75c46;color:#a24a35}.dark .od-dialog-host .od-btn-danger{color:#e8a08c}.od-dialog-host .od-link{font:inherit;color:var(--pd-accent);text-decoration:underline;background:none;border:0;padding:2px;min-height:24px}.od-dialog-host .od-trust,.od-dialog-host .od-anchor{font-size:15px;color:var(--pd-muted);margin:14px 0 0}.od-dialog-host .od-error{color:#a24a35;font-size:15px;margin:10px 0 0}.dark .od-dialog-host .od-error{color:#e8a08c}.od-dialog-host .od-row{display:flex;gap:10px;flex-wrap:wrap}.od-dialog-host .od-notice{background:var(--pd-soft);border-radius:10px;padding:10px 14px}@media(max-width:760px){.od-dialog-host{padding:10px}.od-dialog-host .od-dialog{padding:24px 16px 18px;max-height:calc(100dvh - 20px)}.od-dialog-host .od-dialog h2{font-size:23px}.od-dialog-host .od-plans{grid-template-columns:1fr}}.od-dialog-host .od-dialog:focus,.od-dialog-host .od-dialog:focus-visible{outline:none}.od-dialog-host .od-sem legend{color:var(--pd-text)}.od-dialog-host .od-sem-opt span{border-color:var(--pd-line);background:var(--pd-panel)}.od-dialog-host .od-sem-opt span:before{border-color:var(--pd-muted);background:var(--pd-panel)}.od-dialog-host .od-sem-opt small,.od-dialog-host .od-price-lede{color:var(--pd-muted)}.od-dialog-host .od-sem-opt input:checked+span{border-color:var(--pd-accent);background:var(--pd-soft)}.od-dialog-host .od-sem-opt input:checked+span:before{border-color:var(--pd-accent);box-shadow:inset 0 0 0 4px var(--pd-panel);background:var(--pd-accent)}.od-dialog-host .od-sem-what{color:var(--pd-text)}.od-dialog-host .od-sem-what summary{color:var(--pd-accent)}.od-dialog-host .od-switch-box{background:var(--pd-soft);border-color:var(--pd-accent)}.od-dialog-host .od-plan-row{border-color:var(--pd-line)}@media(max-width:760px){.od-dialog-host .od-sem{margin-bottom:12px}}.od-dialog-host .od-renew{color:var(--pd-muted);font-size:13px;margin:8px 0 0;line-height:1.4}.od-founder{margin:6px 0 0;text-align:center;font:italic 13px/1.4 Georgia,serif;color:var(--muted,#66634f)}:where(:root){--bg:#faf6ea;--panel:#fffdf6;--canvas:#f3edda;--text:#242d2a;--muted:#66634f;--line:#e6dfc9;--accent:#47654e;--accent-soft:#ebecd9;--soft:#f4efdf}.od-tabs,.od-tabs *,.od-tabview,.od-tabview *{box-sizing:border-box}.od-tabs{color:var(--text);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Arial,sans-serif}:root{--od-tab-h:58px;--od-rail-w:84px}.od-tabs{position:fixed;inset-inline:0;bottom:0;z-index:40;display:grid;grid-template-columns:repeat(5,1fr);height:calc(var(--od-tab-h) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--panel);border-top:1px solid var(--line)}.od-tab{margin:0;padding:0;border:0;border-radius:0;background:none;font-family:inherit;line-height:1.2;cursor:pointer;position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;min-height:48px;color:var(--muted);font-size:11px;font-weight:600;letter-spacing:.1px}.od-tab svg{width:22px;height:22px}.od-tab.on{color:var(--accent)}.od-tab.on:before{content:"";position:absolute;inset-block-start:0;inset-inline:22%;height:3px;border-radius:0 0 3px 3px;background:var(--accent)}.od-tab:focus-visible{outline:3px solid var(--accent);outline-offset:-4px}.od-tab .od-badge{position:absolute;inset-block-start:5px;inset-inline-start:calc(50% + 6px);min-width:18px;height:18px;padding:0 5px;border-radius:9px;background:#b8503a;color:#fff;font-size:11px;line-height:18px;text-align:center;font-weight:700}.od-tab .od-badge[hidden]{display:none}body.od-has-tabs{padding-bottom:calc(var(--od-tab-h) + env(safe-area-inset-bottom))}body.od-has-tabs.od-has-sticky{padding-bottom:calc(var(--od-tab-h) + 64px + env(safe-area-inset-bottom))}body.od-has-tabs .od-sticky{bottom:calc(var(--od-tab-h) + env(safe-area-inset-bottom));z-index:39;padding-bottom:10px}body:not(.od-has-tabs).od-has-sticky{padding-bottom:calc(72px + env(safe-area-inset-bottom))}.od-tabview{position:fixed;inset:0 0 calc(var(--od-tab-h) + env(safe-area-inset-bottom)) 0;max-height:100dvh;overscroll-behavior:contain;z-index:38;overflow:auto;background:var(--bg);color:var(--text);-webkit-overflow-scrolling:touch}.od-tabview[hidden]{display:none}body.od-layer-open{overflow:hidden}body.od-layer-open .od-sticky{display:none}.od-wrap{max-width:760px;margin:0 auto;padding:18px 16px 40px}.od-loading{color:var(--muted)}.od-head{display:flex;align-items:center;gap:12px;margin:0 0 14px}.od-head h1{font-family:Georgia,serif;font-weight:400;font-size:28px;margin:0;flex:1}.od-sub,.od-note{color:var(--muted);font-size:13px;margin:0}.od-note{margin-top:14px}.od-streak{font-weight:700;margin:0;font-size:15px}.od-card{display:flex;align-items:center;justify-content:space-between;gap:14px;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin:0 0 12px;box-shadow:var(--shadow)}.od-card p{margin:0 0 6px;font-size:15px}.od-due{justify-content:flex-start}.od-big{font-family:Georgia,serif;font-size:48px;line-height:1;color:var(--accent);min-width:64px;text-align:center}.od-big-ok{display:flex;justify-content:center}.od-big-ok svg{width:44px;height:44px;stroke-width:1.8}.od-actions{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 14px}.od-actions .btn,.od-card .btn{min-height:48px;padding:12px 20px;font-size:14px;text-decoration:none}.od-chips{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 14px}.od-chips .chip{min-height:44px;padding:8px 14px;border:1px solid var(--line);border-radius:20px;background:var(--panel);color:var(--muted);font-size:13px}.od-chips .chip.active,.od-chips .chip[aria-pressed=true]{background:var(--accent-soft);color:var(--accent);border-color:var(--accent)}.od-units{list-style:none;margin:0;padding:0;display:grid;gap:8px}.od-unit{display:grid;grid-template-columns:1fr auto;gap:6px 10px;width:100%;text-align:start;min-height:56px;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:var(--panel)}.od-unit:hover{border-color:var(--accent)}.od-unit.locked{opacity:.7}.od-unit:disabled{opacity:.4}.od-unit-t{font-size:15px;font-weight:600}.od-unit-n{color:var(--muted);font-size:13px;font-variant-numeric:tabular-nums}.od-bar{grid-column:1/-1;height:5px;border-radius:3px;background:var(--line);overflow:hidden}.od-bar i{display:block;height:100%;background:var(--accent)}.od-session{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:16px 16px 18px;box-shadow:var(--shadow)}.od-sess-top{display:flex;justify-content:space-between;color:var(--muted);font-size:13px;margin-bottom:8px}.od-sess-dots{display:flex;gap:4px;margin-bottom:14px}.od-sess-dots i{flex:1;height:5px;border-radius:3px;background:var(--line)}.od-sess-dots i.ok{background:#4d8a5a}.od-sess-dots i.no{background:#c0634f}.od-sess-dots i.cur{background:var(--accent)}@font-face{font-family:PD Sub;src:local("Helvetica Neue"),local("HelveticaNeue"),local("Arial"),local("ArialMT"),local("Roboto"),local("Segoe UI");unicode-range:U+2080-209F}.od-q h2{font-family:PD Sub,Georgia,serif;font-weight:400;font-size:20px;line-height:1.35;margin:0 0 12px}.od-q .quiz-option{width:100%;min-height:52px;font-size:15px}.od-q .quiz-option[aria-disabled=true]{cursor:default;opacity:1}.od-q .quiz-option:focus-visible,.od-session [data-question-heading]:focus-visible,.od-session .btn:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.od-q .quiz-option.wrong{animation:od-shake .2s}.od-q .runner-figure{display:flex;justify-content:center;padding:14px;margin:12px 0;background:var(--canvas,var(--soft));border:1px solid var(--line);border-radius:12px;overflow:hidden}.od-q .runner-figure>svg,.od-q .runner-figure .rxn-fig svg{width:auto;max-width:100%;height:auto;max-height:230px;color:var(--text)}.od-q .runner-figure>svg[viewBox]:not([width]){width:min(100%,380px)}.od-q .quiz-options.fig-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.od-q .fig-options .quiz-option{display:flex;flex-direction:column;align-items:center;justify-content:flex-start;gap:8px;min-height:150px;min-width:0;text-align:center}.od-q .fig-options .option-letter{align-self:flex-start}.od-q .fig-options .opt-fig{display:flex;justify-content:center;align-items:center;width:100%;flex:1}.od-q .fig-options .opt-fig svg{width:auto;max-width:100%;height:auto;max-height:120px;color:var(--text)}@keyframes od-shake{25%{transform:translate(-5px)}75%{transform:translate(5px)}}.od-fb{margin:14px 0 0;padding:12px 14px;border-radius:10px;font-size:14px;background:var(--soft)}.od-fb.ok strong{color:#3f7a4c}.od-fb.no strong{color:#b8503a}.od-next-in{display:block;margin-top:4px;color:var(--muted);font-size:13px}.od-fb.ok .od-next-in{color:#3f7a4c}.od-fb.no .od-next-in{color:#b8503a}.od-sess-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:12px}.od-sess-actions .btn{min-height:48px;padding:12px 22px;font-size:14px}.od-end{text-align:center;padding:28px 18px}.od-end h3{font-family:Georgia,serif;font-weight:400;font-size:26px;margin:0 0 8px}.od-line{color:var(--muted);margin:8px 0}.od-end .od-sess-actions{justify-content:center}.od-mech-title{margin:0 0 8px;color:var(--muted);font-size:13px}.od-cardface{touch-action:pan-y;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;display:block;width:100%;min-height:240px;border:1px solid var(--line);border-radius:16px;background:var(--canvas);color:var(--text);padding:18px;text-align:center;cursor:pointer;perspective:800px;transition:transform .18s ease-out,opacity .18s ease-out}.od-card-stage{overflow:hidden;padding:6px;margin:-6px;isolation:isolate}.od-cardface.is-dragging{transition:none;cursor:grabbing}.od-cardface.is-grading{pointer-events:none}.od-cardface:focus-visible,.od-chapter-misses:focus-visible,.od-grade .btn:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.od-cardq{min-width:0}.od-card-text,.od-hook{overflow-wrap:anywhere}.od-flash-help,.od-flash-feedback,.od-flash-intro{font-size:14px;line-height:1.5;color:var(--muted);margin:12px 0}.od-flash-feedback{min-height:2.8em;margin-bottom:0}.od-miss-count{display:inline-flex;align-items:center;justify-content:center;min-width:26px;padding:2px 8px;border-radius:20px;background:var(--accent-soft);color:var(--accent);font-size:13px;font-weight:700;font-variant-numeric:tabular-nums}.od-units .od-flash-deck{gap:0;min-width:0;border:1px solid var(--line);border-radius:12px;background:var(--panel);overflow:hidden}.od-flash-deck>.od-unit{border:0;border-radius:0}.od-flash-deck>.od-chapter-misses{grid-column:1/-1;justify-content:flex-start;gap:8px;min-height:44px;border:0;border-top:1px solid var(--line);border-radius:0;background:var(--panel);color:var(--accent);padding:8px 14px;font-size:14px}.od-chapter-misses:disabled{opacity:.6}.od-flash-deck>.od-unit:focus-visible,.od-flash-deck>.od-chapter-misses:focus-visible{outline-offset:-3px}.od-flip{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;min-height:204px;animation:od-flip .25s ease-out}@keyframes od-flip{0%{transform:rotateY(90deg);opacity:.2}to{transform:none;opacity:1}}.od-card-fig svg{max-width:100%;height:auto;max-height:190px;color:var(--text)}.od-card-text{font-size:22px;line-height:1.3;margin:0;font-weight:600}.od-hook{margin:0;padding:6px 12px;border-radius:8px;background:var(--accent-soft);color:var(--accent);font-size:15px}.od-tap{margin:0;color:var(--muted);font-size:13px}.od-grade{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:12px}.od-grade .btn{flex-direction:column;gap:2px;min-height:56px;font-size:15px;padding:12px 8px}.od-grade small{color:var(--muted);font-size:12px}.od-grade .again{border-color:#c0634f;color:#b8503a}.od-grade .good{border-color:#4d8a5a;color:#3f7a4c}.od-grade .easy{border-color:#3b6fb0;color:#2f5f9f}.od-why-host{margin-top:10px}.od-why{border:1px solid var(--accent);border-radius:12px;padding:12px;background:var(--panel)}.od-why-fig{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}.od-why-fig svg{max-height:150px;width:auto;max-width:100%;color:var(--text)}.od-why-ans{outline:2px solid #4d8a5a;border-radius:8px;padding:2px}.od-why-cap{font-size:17px;line-height:1.4;margin:10px 0;min-height:48px}.od-why-bar{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.od-why-bar .btn{min-height:44px;min-width:44px}.od-why-bar .spacer{flex:1}.od-search{width:100%;min-height:46px;padding:10px 14px;border:1px solid var(--line);border-radius:12px;background:var(--panel);color:var(--text);font-size:16px;margin-bottom:14px}.od-mgroup h2{font-size:12px;letter-spacing:1.5px;text-transform:uppercase;color:var(--muted);margin:16px 0 8px}.od-mgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}.od-mtile{min-height:56px;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:var(--panel);text-align:start;font-size:14px;font-weight:600}.od-mtile.locked{opacity:.7}.od-mpane{display:grid;gap:12px}.od-mstage{position:relative;min-height:320px;touch-action:none;border:1px solid var(--line);border-radius:16px;background:var(--canvas);overflow:hidden}.od-mstage canvas{display:block;width:100%;height:100%}.od-mcap{font-size:17px;margin:0 0 10px}@media(min-width:1024px){.od-tabs{inset-block:0;inset-inline:auto;inset-inline-start:0;width:var(--od-rail-w);height:auto;grid-template-columns:1fr;grid-template-rows:repeat(5,76px);align-content:start;padding:76px 0 0;border-top:0;border-inline-end:1px solid var(--line)}.od-tab.on:before{inset-block:18%;inset-inline:auto;inset-inline-start:0;width:3px;height:auto;border-radius:0 3px 3px 0}body.od-has-tabs{padding-bottom:0;padding-inline-start:var(--od-rail-w)}body.od-has-tabs.od-has-sticky{padding-bottom:56px}body.od-has-tabs .sidebar{inset-inline-start:var(--od-rail-w)}body.od-has-tabs .od-sticky{inset-inline-start:calc(var(--od-rail-w) + 218px);bottom:0}.od-tabview{inset:0 0 0 var(--od-rail-w)}.od-mpane{grid-template-columns:minmax(0,1.4fr) minmax(220px,1fr)}.od-mstage{min-height:460px}.od-wrap{padding-top:32px}}@media(prefers-reduced-motion:reduce){.od-flip,.od-q .quiz-option.wrong{animation:none}.od-cardface{transition:none}}.od-fallback{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;min-height:240px;color:var(--muted);text-align:center;padding:16px}.od-fallback svg.od-flat{width:100%;max-height:300px}.od-fallback svg{max-height:200px;width:auto;color:var(--text)}.od-tab,.od-unit,.od-mtile,.od-chips .chip,.od-actions .btn,.btn{touch-action:manipulation}.od-more{display:inline;margin-inline-start:6px}.od-more summary{display:inline;color:var(--accent);cursor:pointer;font-weight:600;list-style:none}.od-more summary::-webkit-details-marker{display:none}.od-more[open] summary{display:block;margin-top:6px}.od-more span{display:block;margin-top:4px}.od-p{margin:0 0 .8em}sub{font-size:.72em;line-height:0;vertical-align:baseline;position:relative;top:.28em}.od-timer{display:flex;align-items:center;gap:6px;margin:0 0 8px;color:var(--muted);font-size:14px}.od-timer b{font-size:20px;color:var(--text);min-width:1.6em;text-align:end;font-variant-numeric:tabular-nums}.od-timer i{flex:1;height:5px;border-radius:3px;background:var(--line);overflow:hidden}.od-timer u{display:block;height:100%;background:var(--accent);text-decoration:none;transition:inline-size .2s linear}.rxn-fig{display:flex;align-items:center;justify-content:center;gap:6px;flex-wrap:wrap}.rxn-fig svg{max-height:130px;width:auto;max-width:42vw;color:var(--text)}.rxn-arrow{font-size:20px;color:var(--accent);font-weight:700}@media(prefers-reduced-motion:reduce){.od-timer u{transition:none}}.od-clock{font-variant-numeric:tabular-nums;font-weight:700;color:var(--text)}.od-grid{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 14px}.od-gq{min-width:44px;min-height:44px;border:1px solid var(--line);border-radius:10px;background:var(--panel);font-size:14px}.od-gq.ans{background:var(--accent-soft);border-color:var(--accent)}.od-gq.flag{outline:2px solid #c78a2c}.od-gq.cur{box-shadow:0 0 0 2px var(--accent)}.od-bars{display:grid;gap:8px;margin:14px 0;text-align:start}.od-bar-row{display:grid;grid-template-columns:1fr auto;gap:4px 8px;font-size:14px}.od-bar-row em{color:var(--muted);font-style:normal}.od-bar-row .od-bar{grid-column:1/-1}.od-exam .quiz-option.selected{border-color:var(--accent);background:var(--accent-soft)}.od-h2{font-size:12px;letter-spacing:1.5px;text-transform:uppercase;color:var(--muted);margin:18px 0 8px}a.od-unit{text-decoration:none;color:inherit;display:grid}.od-mapwrap{display:grid;gap:12px}.od-mapwrap>*{min-width:0}.od-mapsvg{border:1px solid var(--line);border-radius:14px;background:var(--panel);overflow:auto}.od-rmap{width:100%;height:auto;min-width:720px;display:block}.od-node rect{fill:var(--accent-soft);stroke:var(--accent);stroke-width:1.2}.od-node text{font-size:14px;fill:var(--text);font-weight:600}.od-node.on rect{fill:var(--accent)}.od-node.on text{fill:var(--panel)}.od-edge .line{fill:none;stroke:var(--accent);stroke-width:1.6;opacity:.65}.od-edge .hit{fill:none;stroke:transparent;stroke-width:16}.od-edge text{font-size:13px;paint-order:stroke;stroke:var(--panel);stroke-width:4px;fill:var(--muted)}.od-edge.quiet text{display:none}.od-edge.quiet:hover text,.od-edge.quiet:focus-visible text{display:block}.od-edge{cursor:pointer}.od-edge:hover .line,.od-edge:focus-visible .line,.od-edge.on .line{opacity:1;stroke-width:3}.od-edge:focus-visible{outline:none}.od-edge:hover text,.od-edge.on text{fill:var(--text);font-weight:700}.od-focus{max-height:132px;overflow:auto}.od-arrows{list-style:none;margin:0;padding:0;display:grid;gap:8px}.od-arrow{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:8px;width:100%;min-height:56px;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:var(--panel);text-align:center;font-size:14px}.od-arrow .a{display:flex;flex-direction:column;align-items:center;color:var(--accent);font-size:18px;line-height:1}.od-arrow .a em{font-style:normal;font-size:12px;color:var(--text);font-weight:700;max-width:140px}.od-arrow .n{font-weight:600}.od-sheet{border:1px solid var(--accent);border-radius:14px;background:var(--panel);padding:14px;box-shadow:var(--shadow)}.od-sheet-top{display:flex;justify-content:space-between;align-items:center;gap:8px}.od-morph{display:flex;align-items:center;justify-content:center;gap:8px;margin:10px 0 2px}.od-morph svg.fig-svg,.od-morph .sk-svg{max-height:120px;width:auto;max-width:36vw;color:var(--text)}.od-morph .arr{width:84px;height:24px;flex:0 0 84px;fill:none;stroke:var(--accent);stroke-width:2.5;stroke-linecap:round;stroke-linejoin:round}.od-morph>*{min-width:0}@media(max-width:480px){.od-morph{gap:6px}.od-morph .arr{width:56px;flex-basis:56px}.od-morph svg.fig-svg,.od-morph .sk-svg{max-width:32vw}}.od-cap{text-align:center;color:var(--muted);font-size:13px;margin:0 0 6px}@media(min-width:1024px){.od-mapwrap{grid-template-columns:minmax(0,2.3fr) minmax(270px,1fr);align-items:start}.od-wrap:has(.od-mapsvg){max-width:1340px}.od-mapwrap:not(:has(.od-sheet)){grid-template-columns:minmax(0,1fr)}}@media(prefers-reduced-motion:reduce){.od-edge .line{transition:none}}.od-mrs{margin:0 0 10px;font-size:15px;font-weight:600;color:var(--accent)}.od-chips .chip[disabled]{opacity:.45}.topic-nav button.locked,.cg-topics button.locked{opacity:.7}.od-conds{font-size:15px;line-height:1.5;margin:0 0 8px;color:var(--text);text-transform:none;letter-spacing:0;font-family:inherit}.od-conds .od-cond{font-weight:600}.od-cond-more{display:inline}.od-cond-more summary{min-height:44px;padding:10px 4px;display:inline-flex;align-items:center}.od-cond-more[open] summary{display:flex}.od-cond-more span{font-size:14px;color:var(--muted);font-weight:400}.od-sec{font:700 12px/1.3 system-ui,sans-serif;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:22px 0 10px}.od-note-tight{margin:-4px 0 10px}.od-exams{margin:0 0 14px}.od-exams>summary{cursor:pointer;min-height:44px;display:flex;align-items:center;font-size:14px;font-weight:600;color:var(--accent)}.od-units li{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;align-items:stretch}.od-units li>.od-unit{grid-column:1/-1}.od-units li.od-sub{margin-inline-start:18px;margin-block-start:-4px;padding-inline-start:10px;border-inline-start:3px solid var(--accent-soft)}.od-units li.od-sub>.od-unit{padding-block:10px}.od-units li{position:relative}.od-units li:has(.od-exam-chip)>.od-unit{padding-block-end:52px}.od-exam-chip{position:absolute;inset-inline-end:8px;inset-block-end:4px;min-height:44px;margin:0;padding:8px 12px;border:0;border-radius:10px;background:transparent;color:var(--accent);font-size:13px;font-weight:600;white-space:nowrap}.od-chips[aria-label=Course] .chip{min-height:48px;padding:12px 20px;border-radius:12px;font-size:14px;font-weight:600}@media(min-width:760px){.od-why.has-fig{display:grid;grid-template-columns:minmax(180px,38%) 1fr;column-gap:24px;align-items:center}.od-why.has-fig .od-why-fig{grid-column:1;grid-row:1}.od-why.has-fig .od-why-cap{grid-column:2;grid-row:1;margin:0;font-size:16px}.od-why.has-fig .od-why-bar{grid-column:1/-1;grid-row:2}.od-why-fig svg{max-height:190px}}.od-sheet .od-mistakes{display:block;margin:12px 0 16px;border:1px solid var(--line);border-radius:10px;background:var(--soft,transparent)}.od-sheet .od-mistakes>summary{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:44px;padding:0 12px;cursor:pointer}.od-sheet .od-mistakes>summary:after{content:"";inline-size:8px;block-size:8px;border-inline-end:2px solid currentColor;border-block-end:2px solid currentColor;transform:rotate(45deg);margin-block-start:-3px;transition:transform .15s}.od-sheet .od-mistakes[open]>summary:after{transform:rotate(-135deg);margin-block-start:3px}.od-sheet .od-mistakes>p{margin:0;padding:0 12px 10px}.od-modes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.od-modes .btn{justify-content:center;text-align:center;padding:12px 10px}.od-modes .btn[aria-expanded=true]{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}@media(min-width:700px){.od-modes{display:flex;flex-wrap:wrap}.od-modes .btn{padding:12px 20px}}.od-switch{display:flex;align-items:center;justify-content:space-between;gap:14px;inline-size:100%;max-inline-size:20rem;min-block-size:48px;margin:0 0 14px;padding:6px 14px;border:1px solid var(--line);border-radius:12px;background:var(--panel);color:var(--text,inherit);font:inherit;font-size:14px;font-weight:600;cursor:pointer;touch-action:manipulation}.od-switch-track{position:relative;flex:none;inline-size:44px;block-size:26px;border-radius:13px;background:var(--line);transition:background .15s}.od-switch-track i{position:absolute;inset-block-start:3px;inset-inline-start:3px;inline-size:20px;block-size:20px;border-radius:50%;background:#fff;box-shadow:0 1px 3px #0000004d;transition:transform .15s}.od-switch[aria-checked=true] .od-switch-track{background:var(--accent)}.od-switch[aria-checked=true] .od-switch-track i{transform:translate(18px)}[dir=rtl] .od-switch[aria-checked=true] .od-switch-track i{transform:translate(-18px)}@media(prefers-reduced-motion:reduce){.od-switch-track,.od-switch-track i{transition:none}}.btn.od-why-btn{display:inline-flex;align-items:center;justify-content:center;inline-size:auto;max-inline-size:none;min-block-size:48px;padding:12px 22px;margin:0;font-size:14px;font-weight:600;border-radius:var(--btn-radius,12px)}sub.od-sub{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Arial,sans-serif;font-size:.7em;font-weight:inherit;font-style:normal;font-variant-numeric:lining-nums;line-height:0;vertical-align:baseline;position:relative;inset-block-start:.28em;letter-spacing:0}.od-qhead{display:flex;align-items:center;gap:10px;margin:0 0 12px}.od-qhead b{font-size:16px}.od-qn{color:var(--muted);font-size:13px;flex:1}.od-qhead .btn{min-height:44px;font-size:14px}.od-jump{inline-size:min(560px,100%);max-inline-size:100%;max-block-size:72dvh;margin:auto;padding:14px 14px 18px;border:1px solid var(--line);border-radius:16px;background:var(--bg);color:var(--text);overflow:auto}.od-jump::backdrop{background:#1e282073}.od-jump-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:0 0 12px}.od-jump-top .btn{min-height:44px}.od-jump .od-grid{margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(44px,1fr))}@media(max-width:700px){.od-jump{margin:auto 0 0;inline-size:100%;border-radius:16px 16px 0 0;padding-block-end:calc(18px + env(safe-area-inset-bottom))}}.od-why-host{scroll-margin-block-end:calc(var(--od-tab-h,72px) + env(safe-area-inset-bottom) + 20px)}.od-why-host:not(:empty){margin-block-end:12px}.od-qn{white-space:nowrap}.od-jump-top .od-qn{flex:1;margin-inline-start:4px}@media(max-width:560px){.od-qn-head{display:none}.od-qhead{justify-content:space-between}}.od-flame{display:inline-block;inline-size:1.05em;block-size:1.05em;vertical-align:-.15em;margin-inline-end:2px;color:var(--accent);stroke-width:1.8}.od-morph>.s,.od-morph>.p{flex:1 1 0;display:flex;justify-content:center;min-inline-size:0}.od-morph .sk-svg{max-inline-size:100%;block-size:auto}@media(max-width:820px),(pointer:coarse){button:not(.mp-tick):not(.od-tab),a.btn,.btn,.icon-button,.od-link,.od-account-link,summary{min-height:44px}button:not(.mp-tick):not(.od-tab):not(.od-unit):not(.od-mtile):not(.od-cardface):not(.quiz-option):not(.pc-dot),.icon-button,.play-button{min-width:44px}select,input:not([type=range]):not([type=checkbox]):not([type=radio]),textarea{font-size:16px!important;min-height:44px!important;box-sizing:border-box}select{-webkit-appearance:none;appearance:none;height:44px;padding-block:8px;padding-inline:12px 34px;border:1px solid var(--line);border-radius:10px;background-color:var(--panel);background-repeat:no-repeat;background-position:right 12px center;background-size:12px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5l5-5' fill='none' stroke='%2366634f' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}[dir=rtl] select{background-position:left 12px center;padding-inline:34px 12px}.od-link,.od-account-link{display:inline-flex;align-items:center;justify-content:center;padding-inline:8px}.od-sticky{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:0 4px}.od-sticky.od-sticky{padding-block:4px}.scene-toolbar .icon-button,.molecule-select button,.variant-select button,.mech-tabs button,.topic-nav button,.cg-topics button{min-height:44px}.mp-tick{position:relative}.mp-tick:after{content:"";position:absolute;inset:-12px}summary{display:flex;align-items:center}}@media(max-width:820px){.od-account-float{position:static!important;display:flex;justify-content:flex-end;padding:6px 16px 0}}.board .loupe{position:fixed;z-index:60;width:78px;height:78px;border-radius:50%;overflow:hidden;border:2px solid var(--accent);background:var(--canvas);box-shadow:0 4px 14px #0003;pointer-events:none;isolation:isolate;-webkit-mask-image:-webkit-radial-gradient(white,black)}.board .loupe[hidden]{display:none}.board .loupe svg{display:block;width:78px;height:78px;max-width:none;position:relative;z-index:0}.board .loupe .loupe-svg .target .lp-ring,.board .loupe .loupe-svg .bond-hot.target{stroke-width:1.6}.board .loupe:before,.board .loupe:after{content:"";position:absolute;left:50%;top:50%;z-index:1;pointer-events:none}.board .loupe:before{width:18px;height:18px;margin:-10px 0 0 -10px;border:2px solid var(--accent);border-radius:50%;background:transparent}.board .loupe:after{width:3px;height:3px;margin:-1.5px 0 0 -1.5px;border-radius:50%;background:var(--accent)}.drill-overall{margin:0 0 12px;padding:10px 14px;border-radius:10px;background:var(--accent-soft);color:var(--text);font-size:15px;font-weight:600;line-height:1.4;overflow-wrap:anywhere}.drill-overall:before{content:"Overall ";font-weight:500;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.4px;margin-inline-end:6px}.board .hit{fill:transparent;stroke:none;pointer-events:none}.board.is-ss .source .lp-ring,.board.is-ss .bond-hot{stroke:#009e73;fill:#009e7314}.board .ss-src .lp-ring,.board .bond-hot.ss-src{fill:#009e7333;stroke:#009e73;stroke-width:2.4;stroke-dasharray:none}.board .atom.ss-src .label{fill:#007a59}.board .atom.ss-sink .label{fill:#b04a00}.board .atom.ss-sink:before{content:""}.board .ss-sink .lp-ring,.board .bond-hot.ss-sink{fill:#d55e0033;stroke:#d55e00;stroke-width:2.4;stroke-dasharray:none}.board .glow-sink .lp-ring,.board .bond-hot.glow-sink{fill:#d55e0033;stroke:#d55e00;stroke-width:2;stroke-dasharray:none}.board .atom.glow .label,.board .atom.glow-sink .label{paint-order:stroke;stroke-width:9px}.board .atom.glow .label{stroke:#e69f0066}.board .atom.glow-sink .label{stroke:#d55e0066}.board .atom.ss-src .label{paint-order:stroke;stroke:#009e7355;stroke-width:9px}.board .atom.ss-sink .label{paint-order:stroke;stroke:#d55e0055;stroke-width:9px}.board .ss-tag{font:700 13px Inter,Arial,sans-serif;text-anchor:middle}.board .ss-tag.src{fill:#007a59}.board .ss-tag.sink{fill:#b04a00}.board .arrow.ghost{stroke:var(--muted);stroke-dasharray:6 5;opacity:.85}.board .head-ghost{fill:var(--muted)}.board .arrow.worked{opacity:.9}.board .arrow.bad.snap{animation:od-snap .15s ease-in forwards}@keyframes od-snap{0%{opacity:1;transform:none}to{opacity:0}}.board .tip{fill:none;stroke:#3f6fb0;stroke-width:2}.drill-rescue{display:flex;gap:10px;margin-top:10px}.drill-rescue .btn{flex:1;min-height:48px}.drill-feedback .od-more{display:block;margin-top:4px}.drill-feedback[data-error]{animation:od-shake .2s}@media(prefers-reduced-motion:reduce){.drill-feedback[data-error],.board .arrow.bad.snap{animation:none}}.drill-actions .btn[data-a=hint][data-hint-level="1"],.drill-actions .btn[data-a=hint][data-hint-level="2"],.drill-actions .btn[data-a=hint][data-hint-level="3"]{border-color:#e69f00;color:#8a5a00}.mv-bar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:0 0 12px}.mv-bar .chip{min-height:44px;padding:8px 14px;border:1px solid var(--line);border-radius:20px;background:var(--panel);color:var(--muted);font-size:13px}.mv-bar .chip[aria-pressed=true],.mv-bar .chip.active{background:var(--accent-soft);color:var(--accent);border-color:var(--accent)}.mv-fade{display:flex;gap:6px;flex-wrap:wrap;margin:0 0 12px}.mv-fade button{min-height:44px;padding:8px 12px;border:1px solid var(--line);border-radius:10px;background:var(--panel);font-size:13px;color:var(--muted)}.mv-fade button.active{border-color:var(--accent);background:var(--accent-soft);color:var(--accent);font-weight:700}.mv-fade button.done{color:#3f7a4c}.mastery{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted)}.mastery .seg4{display:grid;grid-template-columns:repeat(4,22px);gap:3px}.mastery .seg4 i{height:8px;border-radius:3px;background:var(--line)}.mastery .seg4 i.on{background:var(--accent)}.mastery b{color:var(--text);font-weight:700}.mv-after{margin-top:14px;display:grid;gap:12px}.mv-mistakes{border:1px solid #E69F0066;border-radius:10px;background:#e69f001a;padding:10px 12px;font-size:14px;line-height:1.45}.mv-mistakes b{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.4px;color:#8a5a00;margin-bottom:2px}.mv-mistakes p{margin:0}.mv-explain{border:1px solid var(--line);border-radius:12px;background:var(--panel);padding:12px 14px}.mv-explain h4{margin:0 0 8px;font-size:16px;font-family:Georgia,serif;font-weight:400}.mv-explain .quiz-option{width:100%;min-height:48px;margin-bottom:6px;font-size:15px}.mv-explain .od-fb{margin-top:8px}.mastery .seg4 i.new{background:var(--muted);opacity:.5}.scheme-fig{display:flex;align-items:center;justify-content:center;gap:4px;flex-wrap:nowrap;color:var(--text)}.scheme-fig .sc-cell{margin:0;display:flex;flex-direction:column;align-items:center;gap:2px;min-width:0}.scheme-fig .sc-cell svg{max-width:112px;height:auto;max-height:110px}.scheme-fig figcaption{font-size:11px;color:var(--muted);text-align:center;line-height:1.2;max-width:112px}.scheme-fig .sc-arrow{display:flex;flex-direction:column;align-items:center;gap:2px;flex:0 1 92px;min-width:56px}.scheme-fig .sc-r{font-size:12px;line-height:1.2;text-align:center;overflow-wrap:anywhere}.scheme-fig .occl{background:repeating-linear-gradient(45deg,var(--soft),var(--soft) 6px,var(--line) 6px,var(--line) 12px);border:2px dashed var(--muted);border-radius:10px;display:grid;place-items:center;font-weight:800;color:var(--muted)}.scheme-fig .sc-cell.occl{width:96px;height:80px;font-size:34px}.scheme-fig .sc-r.occl{padding:6px 14px;font-size:20px;min-width:44px}.od-card-fig .scheme-fig svg{max-height:110px}.mv-explain .mv-q{margin:0 0 10px;font-size:16px;line-height:1.4}.mv-explain .quiz-option{display:flex;gap:10px;align-items:center;text-align:start}.od-tag{display:inline-block;margin:0 0 8px;padding:3px 10px;border-radius:12px;background:#e69f0026;color:#8a5a00;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.4px}.od-goal{display:flex;align-items:center;gap:10px;margin:0 0 12px;flex-wrap:wrap}.od-week{display:inline-flex;gap:5px}.od-week i{width:18px;height:18px;border-radius:50%;border:2px solid var(--line);background:var(--panel)}.od-week i.on{background:var(--accent);border-color:var(--accent)}.od-week i.now{outline:2px solid var(--accent);outline-offset:2px}.od-goal-t{font-size:13px;color:var(--muted);flex:1;min-width:120px}.od-goal .chip{min-height:44px;padding:8px 14px;border:1px solid var(--line);border-radius:20px;background:var(--panel);color:var(--muted);font-size:13px}.od-exam-ctl{display:flex;gap:8px;align-items:center}.od-exam-ctl input[type=date]{min-height:44px;padding:6px 10px;border:1px solid var(--line);border-radius:10px;background:var(--panel);color:var(--text);font-size:16px}.od-onb{position:fixed;inset:0;z-index:80;background:var(--bg);color:var(--text);overflow:auto;padding:env(safe-area-inset-top) 0 env(safe-area-inset-bottom);-webkit-overflow-scrolling:touch}body.od-onb-open{overflow:hidden}.od-onb-top{display:flex;align-items:center;justify-content:space-between;margin:0 0 14px}.od-onb-dots{display:inline-flex;gap:6px}.od-onb-dots i{width:28px;height:6px;border-radius:3px;background:var(--line)}.od-onb-dots i.on{background:var(--accent)}.od-onb .od-h2{font-family:Georgia,serif;font-weight:400;font-size:22px;margin:18px 0 10px}.od-onb .runner-figure{display:flex;justify-content:center;margin:0 0 12px}.od-save{margin-top:8px}.od-report-row{display:flex;flex-wrap:wrap;gap:6px 14px;align-items:center;justify-content:flex-end;margin:10px 0 0;font-size:12px;color:var(--muted)}.od-report{display:inline-flex;align-items:center;min-height:44px;padding:0 4px;color:var(--muted);text-decoration:underline}.od-byline{margin-inline-end:auto}.od-a2hs{position:fixed;inset-inline:10px;bottom:calc(var(--od-tab-h) + env(safe-area-inset-bottom) + 70px);z-index:45;display:flex;gap:12px;align-items:center;justify-content:space-between;background:var(--panel);border:1px solid var(--accent);border-radius:14px;padding:12px 14px;box-shadow:0 8px 28px #0002}.od-a2hs strong{display:block;font-size:14px}.od-a2hs p{margin:4px 0 0;font-size:13px;color:var(--muted);display:flex;align-items:center;gap:4px;flex-wrap:wrap}.od-a2hs .btn{min-height:44px;flex:none}body.od-layer-open .od-a2hs{bottom:calc(var(--od-tab-h) + env(safe-area-inset-bottom) + 12px)}.od-diff{display:inline-flex;align-items:center;gap:3px;font-size:12px;color:var(--muted)}.od-diff i{width:8px;height:8px;border-radius:50%;border:1.5px solid var(--muted)}.od-diff i.on{background:var(--accent);border-color:var(--accent)}.od-diff em{font-style:normal;margin-inline-start:4px}.od-sess-top{gap:8px;align-items:center}.od-sess-top span:first-child{flex:1}.mv-cation{border:1px solid var(--line);border-radius:12px;background:var(--panel);padding:12px 14px;margin:0 0 12px}.mv-cation h4{margin:0 0 6px;font-size:16px;font-family:Georgia,serif;font-weight:400}.mv-cation .mv-q{margin:0 0 8px;font-size:15px}.mv-cation .quiz-option{width:100%;min-height:52px;margin-bottom:6px}.mv-cation .mv-why{margin:8px 0 0;font-size:14px;color:var(--muted)}.mv-cation .runner-figure{display:flex;justify-content:center}.od-stab{display:grid;gap:6px;margin:10px 0 0}.od-stab-row{display:grid;grid-template-columns:minmax(110px,40%) 1fr;gap:10px;align-items:center;font-size:13px}.od-stab-bar{height:10px;border-radius:5px;background:var(--line);overflow:hidden;display:block}.od-stab-bar u{display:block;height:100%;background:var(--muted);border-radius:5px;text-decoration:none}.od-stab-row.best .od-stab-bar u{background:var(--accent)}.od-stab-row.best span{font-weight:700}.od-route{margin:0 0 12px}.od-route-ctl{display:grid;grid-template-columns:1fr 1fr auto;gap:8px;align-items:end;margin-top:8px}.od-route-ctl label{display:grid;gap:4px;font-size:12px;color:var(--muted)}.od-route-ctl select{min-height:44px;font-size:16px;border:1px solid var(--line);border-radius:10px;background:var(--panel);color:var(--text);padding:6px 8px;min-width:0}.od-route-list,.od-route-steps{list-style:none;margin:10px 0 0;padding:0;display:grid;gap:8px}.od-route-pick,.od-route-step{display:flex;justify-content:space-between;gap:8px;align-items:center;width:100%;min-height:48px;padding:8px 12px;text-align:start;border:1px solid var(--line);border-radius:10px;background:var(--panel);font-size:14px}.od-route-pick.on{border-color:#d55e00;background:#d55e0014}.od-route-pick em{font-style:normal;color:var(--muted);font-size:12px;flex:none}.od-route-step{flex-direction:column;align-items:flex-start;gap:2px}.od-route-step span{color:var(--muted);font-size:12px}.od-route-steps{counter-reset:rs}.od-route-steps li{counter-increment:rs;display:flex;gap:8px;align-items:center}.od-route-steps li:before{content:counter(rs);width:24px;height:24px;border-radius:50%;background:#d55e00;color:#fff;display:grid;place-items:center;font-size:12px;font-weight:700;flex:none}.od-edge.route .line{stroke:#d55e00;opacity:1;stroke-width:4}.od-edge.route text{fill:var(--text);font-weight:700}@media(max-width:420px){.od-route-ctl{grid-template-columns:1fr 1fr}.od-route-ctl .btn{grid-column:1/-1}}.od-exam-date summary,.od-route summary{cursor:pointer;font-size:15px;font-weight:600;list-style:none;justify-content:space-between}.od-exam-date summary::-webkit-details-marker,.od-route summary::-webkit-details-marker{display:none}.od-exam-date summary:after,.od-route summary:after{content:"▾";color:var(--muted);margin-inline-start:8px}.od-exam-date[open] summary:after,.od-route[open] summary:after{content:"▴"}.od-exam-date,.od-route{border:1px solid var(--line);border-radius:12px;background:var(--panel);padding:0 14px 10px}.od-exam-date .od-exam-ctl{margin-top:4px}.od-unit-m{grid-column:1/-1}.od-unit-m .mastery{gap:0}.od-route-ctl .btn{font-size:15px;min-height:48px}.od-onb .btn,.mv-fade button,.mv-bar .chip{font-size:14px}body:has(.od-session) .od-a2hs,body:has(.pc) .od-a2hs{display:none}.pl-cont{display:flex;justify-content:center;align-items:center;inline-size:100%;min-height:56px;font-size:17px;border-radius:14px;margin:4px 0 8px}.od-btn-ghost{background:none}.pl-div{margin:22px 4px 8px;font-size:12px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);display:flex;align-items:center;gap:10px}.pl-div:after{content:"";flex:1;border-top:1px solid var(--line)}.pl-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}.pl-row{display:flex;align-items:center;gap:14px;inline-size:100%;min-height:60px;padding:8px 14px;text-align:start;background:var(--panel);border:1px solid var(--line);border-radius:14px;color:var(--text);font-size:16px}.pl-row .pl-t{flex:1;min-inline-size:0;font-weight:600;line-height:1.25}.pl-row .pl-s{font-size:13px;color:var(--muted);min-inline-size:20px;text-align:end}.pl-row.current{border:2px solid var(--accent);background:var(--accent-soft);box-shadow:var(--shadow)}.pl-row.next{opacity:.72}.pl-row.next.locked{opacity:.6}.pl-row.done .pl-s{color:var(--accent);font-weight:700}.pl-row:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.pl-ring{position:relative;inline-size:44px;block-size:44px;flex:none;display:grid;place-items:center}.pl-ring svg{position:absolute;inset:0;inline-size:100%;block-size:100%}.pl-ring .trk{fill:none;stroke:var(--line);stroke-width:3.4}.pl-ring .val{fill:none;stroke:var(--accent);stroke-width:3.4;stroke-linecap:round}.pl-ring b{font-size:15px;font-weight:700;position:relative}.pl-ring.done b{color:var(--accent);font-size:18px}.pl-hint{position:relative;display:grid;gap:4px;justify-items:start;padding:14px 16px;margin:0 0 12px;background:var(--accent-soft);border:1px solid var(--accent);border-radius:14px}.pl-hint-n{margin:0;font-size:12px;color:var(--muted)}.pl-hint-t{margin:0 0 6px;font-size:18px;font-weight:700}.pl-hint .btn{min-height:44px}.pl-x{position:absolute;inset-block-start:0;inset-inline-end:0;inline-size:44px;block-size:44px;font-size:24px;color:var(--muted)}.pl-map{margin:18px 0 6px;display:flex;flex-wrap:wrap;gap:8px}.pl-map .btn{min-height:44px}@media(min-width:1024px){.pl-plan{display:none}}.pl-help{max-inline-size:640px;margin-block:8px;color:var(--muted);font-size:14px}.pl-help summary{display:list-item;cursor:pointer;min-block-size:44px;padding:12px 8px;inline-size:fit-content;min-inline-size:70px}.pl-help .btn{min-block-size:44px;margin:4px 8px}.pl-legal{margin-top:18px;font-size:12px;color:var(--muted)}.pl-legal a{color:var(--muted)}.pc{display:flex;flex-direction:column;min-block-size:calc(100dvh - var(--od-tab-h) - env(safe-area-inset-bottom) - 56px);max-inline-size:640px;margin:0 auto}.pc-top{display:flex;align-items:center;gap:6px;margin:0 0 10px}.pc-back{inline-size:44px;block-size:44px;flex:none;font-size:24px;border-radius:12px;color:var(--text);border:1px solid var(--line);background:var(--panel)}.pc-bar{flex:1;block-size:10px;border-radius:99px;background:var(--line);overflow:hidden}.pc-count{font-size:13px;font-weight:600;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}.pc-bar i{display:block;block-size:100%;background:var(--accent);border-radius:99px;transition:inline-size .3s}.pc-kicker{margin:0 0 8px;font-size:13px;color:var(--muted);font-weight:600}.pc-step{flex:1;display:flex;flex-direction:column;gap:12px}.pc-dots{display:flex;gap:6px}.pc-dot{display:inline-flex;align-items:center;block-size:44px;margin-block:-19.5px;padding:0;border:0;background:none;cursor:default}button.pc-dot{cursor:pointer}button.pc-dot:hover i{opacity:.85}button.pc-dot:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}.pc-dots i{display:block;inline-size:22px;block-size:5px;border-radius:9px;background:var(--line)}.pc-dots i.done{background:var(--accent);opacity:.5}.pc-dots i.cur{background:var(--accent)}.pc-title{margin:4px 0 0;font-family:Georgia,serif;font-weight:400;font-size:26px;line-height:1.2}.pc-vis{display:grid;place-items:center;min-block-size:220px;max-block-size:300px;padding:10px;background:var(--canvas,var(--soft));border:1px solid var(--line);border-radius:16px;overflow:hidden;color:var(--text)}.pc-vis.none{min-block-size:0;display:none}.pc-vis svg{max-inline-size:100%;block-size:auto;max-block-size:270px}.pc-vis.pc-3d{display:block;block-size:min(300px,42dvh);padding:0}.pc-vis.pc-3d canvas{inline-size:100%!important;block-size:100%!important;display:block;touch-action:none}.pc-cap{margin:0;font-size:18px;line-height:1.4}.pc-foot{position:sticky;inset-block-end:0;display:flex;gap:10px;padding:12px 0 6px;background:linear-gradient(transparent,var(--bg) 24%)}.pc-foot .btn{flex:1;min-height:52px;font-size:16px;border-radius:14px}.pc-foot.col{flex-direction:column}.pc-done{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:8px;padding:28px 0}.pc-done h2{margin:0;font-family:Georgia,serif;font-weight:400;font-size:28px}.pc-check{inline-size:84px;block-size:84px;border-radius:50%;display:grid;place-items:center;font-size:44px;background:var(--accent);color:var(--bg);margin-bottom:8px}.pc .od-session{box-shadow:none}.od-stats{margin-top:22px}@media(min-width:1024px){.pc{min-block-size:calc(100dvh - 96px)}.pc-title{font-size:30px}.pc-vis.pc-3d{block-size:340px}.pl-cont,.pl-list{max-inline-size:none}.od-wrap:has(.pl-list){max-inline-size:760px}}@media(max-width:380px){.pc-title{font-size:23px}.pc-cap{font-size:17px}}@media(prefers-reduced-motion:reduce){.pc-bar i{transition:none}}.pl-legal a,.pl-legal button{display:inline-flex;align-items:center;min-block-size:44px;padding:0 8px}.pl-hint .btn{font-size:15px;padding:0 20px;border-radius:12px;background:var(--panel);border:1px solid var(--line)}.od-account-link{min-block-size:44px;min-inline-size:44px}.od-sess-dots[hidden],.od-session .mv-bar,.od-session .drill-overall,.od-session .drill-head,.od-session .mv .player{display:none}.od-session .drill-prompt{margin:4px 0 8px;font-size:16px;line-height:1.4}.od-appbar{display:none}@media(min-width:1024px){.od-appbar{position:fixed;inset:0 0 auto;block-size:56px;z-index:41;display:flex;align-items:center;padding-inline:24px;background:var(--bg);border-block-end:1px solid var(--line)}.od-appbar-brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;color:var(--text);text-decoration:none}.od-appbar-brand b{font-family:Georgia,serif;font-weight:400;font-size:20px;letter-spacing:-.2px}.od-appbar-brand svg{inline-size:26px;block-size:26px;color:var(--accent);stroke-width:1.6}.od-tabview{inset-block-start:56px}.od-tabs{inset-block-start:56px;padding-top:12px}.od-account-float,body:has(.od-test-banner) .od-account-float{top:6px;inset-inline-end:24px;z-index:42}.pc{inline-size:100%;min-block-size:0;max-inline-size:760px;margin-inline:auto}.pc-step{flex:none}.pc-vis{min-block-size:340px;block-size:340px;max-block-size:340px}.pc-vis svg{max-block-size:310px}.pc-vis>svg.sk-svg{inline-size:100%;block-size:310px;max-block-size:310px}.pc-vis>svg:not(.sk-svg){inline-size:min(100%,560px);max-block-size:310px}.pc-vis.pc-3d{block-size:340px}.pc-foot{position:static;padding:20px 0 6px;background:none}.pc:has(.pc-done) .pc-foot{padding-block-start:8px}.od-wrap{padding-top:24px}}.pc-vis.pc-play{display:flex;flex-direction:column;align-items:stretch;place-items:initial;max-block-size:none;padding:0;background:var(--panel)}.pc-play .mp-stage{flex:none;block-size:min(300px,40dvh);min-block-size:240px;inline-size:100%}.pc-play .mp-dock{border-top:1px solid var(--line)}.pc-play .mp{padding:10px 12px 12px;gap:8px}.pc-play .mp-caption{block-size:auto!important;min-block-size:0!important}.od-lock{display:inline-block;inline-size:1em;block-size:1em;vertical-align:-.15em;margin-inline-end:.35em;stroke-width:1.8}.pl-s .od-lock{margin:0;inline-size:18px;block-size:18px}.pc-done{flex:none;padding:36px 0 20px}.pc:has(.pc-done) .pc-foot{position:static;padding-block-start:8px}.pl-hint{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:0 0 0 14px;min-block-size:44px;margin:0 0 10px;font-size:14px;color:var(--text);max-inline-size:640px}.pl-hint .pl-x{position:static;flex:none;font-size:22px}.pc-play .mp-stage{block-size:min(250px,32dvh);min-block-size:190px}.pc-play .mp-capmeta,.pc-play .mp-speed{display:none}.pc-play .mp-caption{min-height:0}.pc-step:has(.pc-play) .pc-cap{display:none}.pc-play .mp-controls{gap:8px}.od-session.od-mechq>.od-sess-top,.od-session.od-mechq>.od-sess-dots{display:none}.pc .od-mech-pat{display:none}.pc:has(.od-mechq) .pc-kicker{display:none}.od-ovf-row{display:flex;justify-content:flex-end;margin:4px 0 0}.od-ovf>summary{list-style:none;display:grid;place-items:center;inline-size:44px;block-size:44px;margin-inline-start:auto;border-radius:12px;font-size:22px;line-height:1;color:var(--muted);cursor:pointer}.od-ovf>summary::-webkit-details-marker{display:none}.od-ovf[open]{display:flex;align-items:center;justify-content:space-between;gap:12px;inline-size:100%}.od-ovf[open]>summary{order:3}.pc-vis>svg:not(.sk-svg){inline-size:min(100%,440px);block-size:auto;max-block-size:300px}@media(max-width:700px){.pc-vis>svg:not(.sk-svg){inline-size:min(100%,360px)}}.pc{position:relative}.pc-side{display:none}@media(min-width:1200px){.pc-side{display:flex;flex-direction:column;gap:10px;position:absolute;inset-block-start:56px;inset-inline-start:calc(100% + 20px);inline-size:192px;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:var(--panel);font-size:14px;line-height:1.35}.pc-side p{margin:0;display:flex;flex-direction:column;gap:2px}.pc-side span{display:block}.pc-side b{font-size:12px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}.pc-side svg{display:inline-block;inline-size:14px;block-size:14px;vertical-align:-2px;margin-inline-end:4px}}@media(min-width:1200px){.pc:has(.od-mechq) .pc-side{display:none}}.pc-watch{position:relative;display:flex;align-items:center;min-block-size:44px;margin:-52px 10px 8px auto;padding:0 16px;border:1px solid var(--accent);border-radius:99px;background:var(--panel);color:var(--accent);font-size:14px;font-weight:600;box-shadow:0 1px 4px #2a3a2a1a}.pc-check{animation:pc-pop .5s cubic-bezier(.2,.9,.3,1.2) both}@keyframes pc-pop{0%{transform:scale(.6);opacity:0}to{transform:none;opacity:1}}@media(prefers-reduced-motion:reduce){.pc-check{animation:none}}.pc-up{margin:0;font-size:16px;color:var(--accent);font-weight:600}.pc-tour{display:grid;gap:8px;justify-items:center;text-align:center;margin:4px 0 6px;padding:14px 16px;background:var(--accent-soft);border:1px solid var(--line);border-radius:14px}.pc-tour p{margin:0;font-size:16px}.pc-tour-btns{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.pc-tour .btn{min-height:44px}.pl-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.pl-head h1{margin:0}.pl-head .pl-plan{min-height:44px;min-inline-size:44px}.pl-prog{margin:4px 0 8px;font-size:15px;color:var(--muted)}.pc-words{margin:14px 0 0;padding:10px 14px 2px;border:1px solid var(--line);border-radius:12px;background:var(--panel)}.pc-words-h{margin:0 0 6px;font-weight:600;font-size:14px;color:var(--muted)}.pc-words ul{list-style:none;margin:0;padding:0;display:grid;gap:6px;font-size:15px;line-height:1.4}.pc-words li b,.pc-words-list b{font-weight:700}.pc-words-all{display:inline-flex;align-items:center;min-height:44px;padding:0;font-size:14px;font-weight:600;color:var(--accent);text-decoration:underline;text-underline-offset:3px}.pc-words.pc-words-none{border:0;background:none;padding:0;margin-top:6px}.od-kw{position:relative;display:inline}.od-kw-t{all:unset;cursor:help;color:inherit;font:inherit;text-decoration:underline dotted;text-decoration-thickness:1.5px;text-underline-offset:.22em;border-radius:3px}.od-kw-t:hover,.od-kw.open .od-kw-t{text-decoration-style:solid;color:var(--accent)}.od-kw-t:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.od-kw-pop{position:absolute;top:calc(100% + 6px);inset-inline-start:0;z-index:40;inline-size:max-content;max-inline-size:min(280px,calc(100vw - 24px));padding:10px 12px;border-radius:10px;background:var(--panel);color:var(--text);border:1px solid var(--line);box-shadow:0 10px 28px #0003;font:400 14px/1.4 Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Arial,sans-serif;letter-spacing:0;text-align:start;white-space:normal}.od-kw-pop[hidden]{display:none}.od-kw-pop b{font-weight:700}dialog.od-kw-all{inline-size:min(560px,calc(100vw - 24px));max-block-size:min(80dvh,720px);padding:0;border:1px solid var(--line);border-radius:16px;background:var(--panel);color:var(--text)}dialog.od-kw-all::backdrop{background:#0008}.od-kw-all-in{padding:6px 18px 18px}.od-kw-all-top{display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;background:var(--panel);padding:8px 0}.od-kw-all-top h2{margin:0;font-size:20px}.od-kw-all-top .btn{min-width:44px;min-height:44px}.pc-words-list{list-style:none;margin:0;padding:0;display:grid;gap:10px;font-size:15px;line-height:1.45}.od-hint-row{margin:10px 0 0;display:grid;justify-items:start;gap:6px}.btn.ghost.od-hint-btn{min-height:44px;padding:0 18px;border:1px solid var(--line);border-radius:999px;color:var(--accent);font-size:15px;font-weight:600}.btn.ghost.od-hint-btn:hover{background:var(--accent-soft)}.od-hint{margin:0;padding:10px 14px;border-radius:10px;background:var(--accent-soft);font-size:15px;line-height:1.4}.od-hint:focus{outline:none}.pc-vis.pc-draw{display:block;place-items:normal;justify-items:stretch;min-block-size:0;block-size:auto;max-block-size:none;overflow:visible;padding:8px}.pc-vis.pc-draw .board svg{max-block-size:none}.pc-redraw{justify-self:start;margin:8px 0 0;min-height:44px}.pl-unlock{display:flex;justify-content:center;align-items:center;inline-size:100%;min-height:48px;font-size:16px;border-radius:14px;margin:0 0 8px}.pl-s{white-space:nowrap}.pl-row.locked .pl-s{font-size:15px}@media(min-width:1024px){.pl-unlock{max-inline-size:none}.pc-done h2{font-size:30px}.pc-done .pc-cap{font-size:18px}.pc-foot.col .btn{min-height:56px;font-size:17px}}.od-q:has(.od-why) .od-trick,.od-wrap:has(.od-why) .od-trick{display:none}.pl-firststep{margin:0 4px 14px;font-size:15px;color:var(--muted);text-align:center}.pl-fullcourse{margin:0 0 10px;text-align:center}.pl-fullbtn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;padding:0 20px;border-radius:999px;border:1px solid var(--accent);background:var(--accent-soft);color:var(--accent);font:inherit;font-size:15px;font-weight:700;letter-spacing:.01em;cursor:pointer}.pl-fullbtn:hover{filter:brightness(.97)}.pl-fullbtn:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.pl-free{display:inline-block;padding:2px 9px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:13px;font-weight:700;letter-spacing:.02em}.pl-div .pl-own{order:3;padding:2px 9px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:12px;letter-spacing:.04em}.pl-div .pl-sem-unlock{order:3;display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 12px;border:1px solid var(--line);border-radius:999px;background:var(--panel);color:var(--accent);font-size:13px;font-weight:700;letter-spacing:.02em;text-transform:none}.pl-div .pl-sem-unlock .od-lock{inline-size:14px;block-size:14px;margin:0}.pl-div:after{order:2}.pc-offer{margin:14px 0 4px;padding:14px 16px;border:1px solid var(--accent);border-radius:14px;background:var(--accent-soft);text-align:left}.pc-offer h3{margin:0 0 4px;font:400 20px/1.25 Georgia,serif;color:var(--text)}.pc-offer p{margin:4px 0 0;font-size:14px;line-height:1.45;color:var(--text)}.pc-offer-price b{font-size:17px}.pc-offer-founder{font:italic 13px/1.4 Georgia,serif;color:var(--muted)!important}.pl-sub{margin:-8px 0 12px;font-size:14px;line-height:1.4;color:var(--muted);text-wrap:pretty}@media(min-width:600px){.pl-sub{font-size:15px}}[data-sess]:empty{min-height:min(476px,62vh);border-radius:14px;background:linear-gradient(90deg,var(--panel) 0%,var(--soft,var(--panel)) 50%,var(--panel) 100%) 0 0/200% 100%;animation:od-skel 1.2s linear infinite}@keyframes od-skel{to{background-position:-200% 0}}@media(prefers-reduced-motion:reduce){[data-sess]:empty{animation:none}}.od-mpane~[data-sess]:empty{min-height:0;background:none;animation:none}.dark .pc-offer-founder{color:#bccab8!important}.pc-pass-preview{margin-block-start:12px;border-block-start:1px solid var(--line);font-size:14px;line-height:1.4}.pc-pass-preview>summary{display:flex;align-items:center;justify-content:space-between;gap:12px;min-block-size:48px;padding-block:10px;cursor:pointer;list-style:none;font-weight:600;color:var(--text)}.pc-pass-preview>summary::-webkit-details-marker{display:none}.pc-pass-preview>summary:after{content:"";flex:none;inline-size:7px;block-size:7px;margin-inline-end:3px;border-inline-end:2px solid currentColor;border-block-end:2px solid currentColor;transform:rotate(45deg)}.pc-pass-preview[open]>summary:after{transform:rotate(-135deg)}.pc-pass-preview>summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}.pc-pass-total,.pc-pass-count{display:block;margin-block-start:3px;font-size:12px;font-weight:400;color:var(--muted)}.pc-pass-preview>ol{list-style:none;margin:0;padding:0}.pc-pass-preview li{padding-block:9px;border-block-start:1px solid var(--line)}.pc-pass-title{display:block;font-weight:600;overflow-wrap:anywhere}.pc-sheet,.pl-sheet{display:inline-flex;align-items:center;min-block-size:44px;padding-inline:8px;font-size:13px;font-weight:600;color:var(--accent);text-underline-offset:3px}.pc-sheet{margin-block:-4px 8px}.pl-sheet{margin-inline-start:64px}.pc-sheet:focus-visible,.pl-sheet:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}.od-sheet-locked{gap:6px;border:0;background:none;font-family:inherit;color:var(--muted);text-decoration:underline;cursor:pointer}.od-sheet-locked svg{inline-size:14px;block-size:14px}.pc-sn2-preview{display:grid;gap:10px;margin:12px 0 6px}.pc-sn2-preview>h3{margin:0;font:400 24px/1.25 Georgia,serif;color:var(--text)}.pc-sn2-preview>.pc-cap{font-size:16px;line-height:1.45}.pc-sn2-preview>.pc-redraw{justify-self:start;margin:0}.btn.ghost.pc-relesson{display:block;margin:16px auto 0;min-height:44px;padding:0 18px;border:1px solid var(--line);border-radius:999px;color:var(--accent);font-size:15px;font-weight:600}@media all{.pc-vis.pc-draw{padding:6px 8px}.pc-step:has(.pc-draw){gap:8px}.pc-step:has(.pc-draw) .pc-title{margin-block:0}.pc-draw .guided-first-top{min-block-size:40px}.pc-draw .guided-first [data-guided-dismiss]{min-height:40px}.pc-draw .drill{display:flex;flex-direction:column}.pc-draw .drill>*{order:5}.pc-draw .drill-head{order:0;margin-block-end:2px}.pc-draw .drill-head .eyebrow{display:none}.pc-draw .drill-head h3{margin-block:2px 0}.pc-draw .drill-prompt{order:1;margin-block:4px}.pc-draw .guided-first{order:2;margin-block:4px 6px;padding-block:4px}.pc-draw .guided-first[data-guided=active]>p:not([data-guided-hint]){position:absolute;inline-size:1px;block-size:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;margin:0}.pc-draw .board{order:3}.pc-draw .drill:has([data-guided-hint]:not([hidden])) .drill-prompt{display:none}.pc-draw .drill-feedback{order:4}.pc-draw .player{order:9;margin-block-start:8px}}[data-hero-demo].pl-hero-go{cursor:pointer;-webkit-tap-highlight-color:transparent}.pc-sheet .od-sheet-ic,.pl-sheet .od-sheet-ic{inline-size:1em;block-size:1em;margin-inline-end:.4em;vertical-align:-.15em}.pc-sheet:not(.od-sheet-locked),.pl-sheet:not(.od-sheet-locked){border:0;background:none;font-family:inherit;cursor:pointer;text-decoration:underline}.od-sv-open{overflow:hidden}.od-sheet-viewer{position:fixed;inset:0;z-index:90;display:grid;place-items:stretch}.od-sv-backdrop{position:absolute;inset:0;background:#10180fcc}.od-sv-panel{position:relative;display:flex;flex-direction:column;inline-size:min(900px,100%);margin:auto;block-size:100%;max-block-size:100dvh;background:var(--bg);color:var(--text);box-shadow:0 20px 60px #0006}@media(min-width:960px){.od-sv-panel{block-size:calc(100dvh - 32px);border-radius:16px;margin-block:16px}}.od-sv-top{display:flex;align-items:center;gap:10px;padding:10px 12px 10px 16px;border-bottom:1px solid var(--line);padding-top:max(10px,env(safe-area-inset-top))}.od-sv-title{flex:1;margin:0;font-size:17px;line-height:1.2}.od-sv-dl{min-block-size:40px;padding-inline:14px;font-size:14px;display:inline-flex;align-items:center;gap:6px;white-space:nowrap}.od-sv-dl .od-lock{margin:0;inline-size:14px;block-size:14px}.od-sv-dl-gated{opacity:.9}.od-sv-x{min-inline-size:44px;min-block-size:44px;border:0;background:none;color:var(--text);font-size:26px;line-height:1;cursor:pointer;border-radius:8px}.od-sv-x:focus-visible,.od-sv-dl:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.od-sv-status{margin:0;padding:8px 16px;font-size:13px;color:var(--muted)}.od-sv-pages{flex:1;overflow:auto;padding:0 12px 24px;-webkit-overflow-scrolling:touch;-webkit-touch-callout:none;-webkit-user-select:none;user-select:none}.od-sv-page{display:block;inline-size:100%;block-size:auto;margin:0 auto 14px;background:#fff;border-radius:6px;box-shadow:0 2px 12px #17383f33;pointer-events:none}@media(max-width:480px){.od-sv-dl{padding-inline:10px;font-size:13px}.od-sv-title{font-size:15px}}@media print{.od-sheet-viewer{display:none!important}}.od-sub,.od-note,.od-goal-t,.od-tap,.od-next-in,.od-fb,.pc-kicker,.pc-count,.od-unit-n,.od-diff,.od-sess-top,.pl-help,.pl-help summary,.od-switch-t,.od-lede{font-size:15px}.btn,.chip,.od-chips .chip,.od-chips[aria-label=Course] .chip,.od-onb .btn,.mv-bar .chip,.od-mside .chip,.od-mpane .chip,.od-modes .btn,.od-actions .btn,.od-card .btn,.od-sess-actions .btn,.btn.od-why-btn,.od-qhead .btn,.od-why-bar .btn,.od-goal .chip,.od-gq,.od-mtile,.od-exam-chip,.od-account-link,.od-link-plain,.od-link{font-size:15px}.od-why-bar>span{font-size:15px}.od-grade small,.od-diff em,.option-letter,.od-report-row,.od-legal,.pl-legal,.od-wrap .odp-head small,.od-wrap .odp-kpi p,.od-wrap .odp-note,.od-wrap .odp-mini,.od-wrap .odp-topics li em,.od-wrap .odp-topics li,.od-wrap .odp-crowd{font-size:13px}.od-wrap .odp-kpi span,.od-sec,.pl-div,.od-badge,.od-mgroup h2{font-size:12px}.od-fb.no strong{color:#a2402a}.dark .od-fb.no strong{color:#f0a392}.od-fb.no .od-next-in{color:var(--text)}.od-sess-top{align-items:center;gap:8px;margin-bottom:10px}.od-sess-exit{inline-size:44px;block-size:44px;flex:none;margin:0 0 2px;font-size:24px;line-height:1;border-radius:12px;color:var(--text);border:1px solid var(--line);background:var(--panel)}.od-sess-exit+span{flex:1}.od-session.od-mechq>.od-sess-top{display:flex}.od-session.od-mechq>.od-sess-top>:not(.od-sess-exit){display:none}.od-session.od-mechq>.od-sess-top:not(:has(.od-sess-exit)){display:none}.od-empty{display:grid;gap:10px;justify-items:start;margin:8px 0 14px}.od-empty p{margin:0;font-size:15px;color:var(--muted)}.od-goal .od-goal-btn{display:inline-flex;align-items:center;gap:6px;color:var(--text);flex:0 1 auto}.od-goal .od-goal-btn:after{content:"▾";font-size:12px;color:var(--muted)}.od-goal .od-goal-btn .od-goal-t{flex:none;min-width:0;color:inherit}.dark .od-grade .again{color:#f0a392;border-color:#c0634f}.dark .od-grade .good{color:#93d5a3;border-color:#4d8a5a}.dark .od-grade .easy{color:#93bdf2;border-color:#3b6fb0}.od-mbrand{display:flex;width:max-content;align-items:center;gap:8px;margin:0 0 4px;min-height:36px;color:var(--text);text-decoration:none;border-radius:8px}.od-mbrand:focus-visible,.od-appbar-brand:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.od-appbar-brand{text-decoration:none;border-radius:8px}.od-mbrand svg{inline-size:24px;block-size:24px;color:var(--accent);stroke-width:1.6}.od-mbrand b{font:400 20px/1.2 Georgia,serif;letter-spacing:-.2px}@media(min-width:1024px){.od-mbrand{display:none}}.pl-founder{margin:-6px 0 10px;text-align:center;font:italic 14px/1.4 Georgia,serif;color:var(--muted)}.pl-founder span{font-style:normal;font-family:inherit;white-space:nowrap}@media(min-width:1200px){:root{--od-rail-w:220px}.od-tabs{grid-template-rows:repeat(5,44px);gap:4px;padding:20px 14px 0;background:var(--sidebar,var(--panel))}.od-tab{flex-direction:row;justify-content:flex-start;gap:12px;min-height:44px;padding:0 12px;border-radius:10px;font-size:14px;font-weight:600;letter-spacing:0;color:var(--muted)}.od-tab svg{width:20px;height:20px;flex:none}.od-tab:hover{background:var(--soft);color:var(--text)}.od-tab.on{background:var(--accent-soft);color:var(--accent)}.od-tab.on:before{inset-block:10px;inset-inline-start:-14px;width:3px}.od-tab .od-badge{position:static;margin-inline-start:auto}.od-tab:focus-visible{outline-offset:0}.od-tabview .od-wrap:has(.pc-side){max-inline-size:1016px}.od-tabview .od-wrap:has(.pc-side) .pc{margin-inline:0 auto}}@media(min-width:1200px)and (min-height:700px){.od-dialog:has(>.cv):has(>.od-pricing){width:min(1140px,100%);display:grid;grid-template-columns:minmax(0,370px) minmax(0,1fr);column-gap:32px;align-content:start;padding:30px 32px}.od-dialog:has(>.cv):has(>.od-pricing)>*{grid-column:1}.od-dialog:has(>.cv):has(>.od-pricing)>h2{margin-block-end:6px}.od-dialog:has(>.cv):has(>.od-pricing)>.od-pricing{grid-column:2;grid-row:1 / span 6;margin:0}.od-dialog:has(>.cv):has(>.od-pricing)>.od-login{align-self:start}.od-dialog:has(>.cv):has(>.od-pricing) .cv-board{max-block-size:170px}.od-dialog:has(>.cv):has(>.od-pricing) .od-plans{gap:12px}}.cs-sub{margin:-6px 0 18px;color:var(--muted);font-size:15px;line-height:1.5;max-inline-size:62ch}.cs-list{list-style:none;margin:0 0 22px;padding:0;display:grid;gap:8px}.cs-row{display:grid;grid-template-columns:36px minmax(0,1fr) auto;grid-template-areas:"n t tag" "n act act";align-items:center;column-gap:12px;row-gap:10px;padding:12px 14px;border:1px solid var(--line);border-radius:14px;background:var(--panel)}.cs-n{grid-area:n;align-self:start;display:grid;place-items:center;inline-size:36px;block-size:36px;border-radius:10px;background:var(--accent-soft,var(--soft));color:var(--accent);font-weight:700;font-size:15px}.cs-row.locked{grid-template-areas:"n t act"}.cs-row.locked .cs-n{align-self:center;background:var(--soft);color:var(--muted)}.cs-t{grid-area:t;display:flex;flex-direction:column;gap:2px;min-inline-size:0}.cs-t b{font-size:15px;font-weight:650;line-height:1.3}.cs-t small{color:var(--muted);font-size:13px}.cs-free{grid-area:tag;justify-self:end;display:inline-flex;align-items:center;gap:4px;font-size:12px;font-weight:700;letter-spacing:.2px}.cs-free{padding:2px 8px;border-radius:999px;background:var(--accent-soft,var(--soft));color:var(--accent)}.cs-act svg{inline-size:14px;block-size:14px}.cs-act{grid-area:act;display:flex;flex-wrap:wrap;gap:8px}.cs-act .btn{display:inline-flex;align-items:center;gap:6px;min-block-size:40px;padding:0 14px;font-size:14px}.cs-act .od-sheet-ic{inline-size:16px;block-size:16px}.cs-dl-gated{color:var(--muted)}@media(min-width:768px){.cs-row,.cs-row.locked{grid-template-columns:36px minmax(0,1fr) auto auto;grid-template-areas:"n t tag act";padding:12px 16px}.cs-n{align-self:center}.cs-act{justify-content:flex-end}}@media(min-width:1200px){.cs-list{grid-template-columns:1fr}}.mt-sub{margin:-6px 0 18px;color:var(--muted);font-size:15px;line-height:1.5;max-inline-size:62ch}.mt-list{list-style:none;margin:0 0 22px;padding:0;display:grid;gap:8px}.mt-row{display:grid;grid-template-columns:36px minmax(0,1fr) auto auto;align-items:center;column-gap:12px;inline-size:100%;min-block-size:64px;padding:12px 14px;text-align:start;font:inherit;color:var(--text);background:var(--panel);border:1px solid var(--line);border-radius:14px;cursor:pointer}.mt-row:hover{border-color:color-mix(in srgb,var(--accent) 45%,var(--line))}.mt-row:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.mt-n{display:grid;place-items:center;inline-size:36px;block-size:36px;border-radius:10px;background:var(--accent-soft);color:var(--accent);font-weight:700;font-size:15px}.mt-row.locked .mt-n{background:var(--soft);color:var(--muted)}.mt-t{display:flex;flex-direction:column;gap:2px;min-inline-size:0}.mt-t b{font-size:15px;font-weight:650;line-height:1.3}.mt-t small{color:var(--muted);font-size:13px;font-variant-numeric:tabular-nums}.mt-free{padding:2px 8px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:12px;font-weight:700}.mt-go{display:flex;align-items:center;font-size:13px;font-weight:650;color:var(--accent);white-space:nowrap}.mt-row.locked .mt-go{color:var(--muted)}.mt-go .od-lock{inline-size:16px;block-size:16px}@media(min-width:768px){.mt-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}}.mt-game{display:grid;gap:12px;max-inline-size:1040px}.mt-top{display:grid;grid-template-columns:auto minmax(0,1fr) auto;grid-template-areas:"back h new";align-items:center;gap:4px 10px;margin:-4px 0 0}.mt-back{grid-area:back}.mt-top .mt-h{grid-area:h}.mt-top .mt-new{grid-area:new}.mt-back{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-block-size:44px;min-inline-size:44px;padding:0 4px;margin-inline-start:-6px;border-radius:10px;font-size:15px;font-weight:600;color:var(--accent)}.mt-back svg{inline-size:20px;block-size:20px;stroke-width:1.8}.mt-back:hover{background:var(--soft)}.mt-game .mt-new{display:inline-flex;min-block-size:44px;padding:0 12px;font-size:14px;color:var(--text);border:1px solid var(--line);background:var(--panel);border-radius:12px}.mt-game .mt-new svg{inline-size:16px;block-size:16px;stroke-width:1.8}.mt-back span{display:none}.mt-h{display:flex;flex-direction:column;gap:1px;min-inline-size:0;margin:0;font:400 21px/1.15 var(--serif,Georgia,serif);letter-spacing:-.01em;outline:0}.mt-h small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font:500 13px/1.3 Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Arial,sans-serif;color:var(--muted);letter-spacing:0}.mt-bar{display:flex;align-items:center;gap:8px 14px;flex-wrap:wrap;font-size:14px;color:var(--muted);font-variant-numeric:tabular-nums}.mt-clock{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;background:var(--accent-soft);color:var(--accent)}.mt-clock b{font-size:17px;font-weight:700;min-inline-size:3.2ch}.mt-clock-i{inline-size:18px;block-size:18px}.mt-count{font-weight:600;color:var(--text)}.mt-best{margin-inline-start:auto}.mt-hint{margin:0;font-size:14px;color:var(--muted)}@media(max-width:899.98px){.mt-hint{position:absolute;inline-size:1px;block-size:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}}.mt-board{display:grid;gap:12px}.mt-ch{margin:0 0 6px;font-size:12px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}.mt-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}.mt-stack{display:grid;gap:6px}.mt-card{position:relative;display:flex;align-items:center;gap:8px;inline-size:100%;min-block-size:48px;margin:0;padding:8px 12px;text-align:start;font:inherit;font-size:15px;line-height:1.35;color:var(--text);background:var(--panel);border:1.5px solid var(--line);border-radius:12px;box-shadow:0 1px color-mix(in srgb,var(--line) 70%,transparent);cursor:pointer;touch-action:manipulation;transition:border-color .12s,background-color .12s,opacity .3s,transform .3s}.mt-term{justify-content:center;text-align:center;font-weight:650}.mt-def{font-size:14px}.mt-card:hover{border-color:color-mix(in srgb,var(--accent) 50%,var(--line))}.mt-card:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.mt-card[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft);box-shadow:inset 0 0 0 1px var(--accent)}.mt-ok{display:none;flex:none;inline-size:18px;block-size:18px;color:var(--accent)}.mt-card.ok,.mt-card:disabled{opacity:1;cursor:default}.mt-card.ok{border-color:var(--accent);background:var(--accent-soft)}.mt-card.ok .mt-ok{display:block}.mt-card.gone{background:none;border-style:dashed;border-color:color-mix(in srgb,var(--line) 85%,transparent);box-shadow:none}.mt-card.gone>*{opacity:0;transition:opacity .3s}.mt-card.bad{border-color:#b8503a;background:color-mix(in srgb,#b8503a 9%,var(--panel));animation:mt-shake .36s}@keyframes mt-shake{20%{transform:translate(-6px)}40%{transform:translate(5px)}60%{transform:translate(-4px)}80%{transform:translate(2px)}}.mt-live{position:absolute;inline-size:1px;block-size:1px;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.mt-game.is-done .mt-board,.mt-game.is-done .mt-hint{display:none}.mt-done{display:grid;justify-items:center;gap:6px;padding:28px 20px 24px;text-align:center;background:var(--panel);border:1px solid var(--line);border-radius:18px;box-shadow:var(--card-shadow,var(--shadow))}.mt-done[hidden]{display:none}.mt-done-k{margin:0;font-size:12px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--accent)}.mt-done h2{margin:0;font:400 54px/1.1 var(--serif,Georgia,serif);font-variant-numeric:tabular-nums;color:var(--text);outline:0}.mt-done-s{margin:0;font-size:15px;line-height:1.5;color:var(--muted);max-inline-size:40ch}.mt-done-act{display:grid;gap:8px;inline-size:100%;max-inline-size:340px;margin-block-start:14px}.mt-done-act .btn{min-block-size:50px;font-size:16px;border-radius:12px}.mt-done-act .btn.ghost{color:var(--accent)}@media(min-width:900px){.mt-game{gap:14px}.mt-top{grid-template-areas:"back . new" "h h h";row-gap:10px}.mt-back{justify-content:flex-start;padding:0 10px 0 4px;margin-inline-start:-4px}.mt-back span{display:inline}.mt-h{gap:2px;font-size:30px}.mt-h small{font-size:14px}.mt-board{gap:24px}.mt-grid,.mt-stack{gap:8px}.mt-card{padding:10px 16px;line-height:1.4}.mt-board{grid-template-columns:minmax(0,300px) minmax(0,1fr);gap:24px;align-items:start}.mt-grid{grid-template-columns:1fr}.mt-term,.mt-def{min-block-size:68px}.mt-term{justify-content:flex-start;text-align:start}.mt-def{font-size:15px}}@media(prefers-reduced-motion:reduce){.mt-card,.mt-card.gone>*{transition:none;transform:none}.mt-card.bad{animation:none}}@media(max-width:1023.98px){.od-tab-wide,.od-tabs-sep{display:none}}#od-more[hidden]{display:none}.od-tab-more[aria-expanded=true]{color:var(--text)}#od-more{position:fixed;inset:0 0 calc(var(--od-tab-h) + env(safe-area-inset-bottom)) 0;z-index:41}#od-more{margin:0}.od-more-back{position:absolute;inset:0;background:#10291e52}.od-more-panel{position:absolute;inset-inline:10px;bottom:10px;display:flex;flex-direction:column;padding:8px;border:1px solid var(--line);border-radius:18px;background:var(--panel);color:var(--text);box-shadow:0 12px 40px #10291e38;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Arial,sans-serif}.od-more-h{margin:6px 12px;font-size:12px;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;color:var(--muted)}.od-more-item{display:flex;align-items:center;gap:14px;min-block-size:52px;margin:0;padding:0 12px;border:0;border-radius:12px;background:none;color:var(--text);font:inherit;font-size:16px;font-weight:600;text-align:start;cursor:pointer;touch-action:manipulation}.od-more-item svg{inline-size:22px;block-size:22px;flex:none;color:var(--muted)}.od-more-item:hover,.od-more-item:focus-visible{background:var(--soft)}.od-more-item:focus-visible{outline:3px solid var(--accent);outline-offset:-3px}.od-more-item.on{background:var(--accent-soft);color:var(--accent)}.od-more-item.on svg{color:var(--accent)}.od-more-item .od-badge{margin-inline-start:auto;min-width:22px;height:22px;padding:0 7px;border-radius:11px;background:#b8503a;color:#fff;font-size:12px;line-height:22px;text-align:center;font-weight:700}.od-more-item .od-badge[hidden]{display:none}.od-more-acct{margin-top:6px;border-top:1px solid var(--line);border-radius:0 0 12px 12px;padding-top:2px}@media(min-width:1024px){.od-tab-more,#od-more{display:none!important}.od-tabs{grid-template-rows:repeat(5,76px) 21px repeat(3,76px)}.od-tabs-sep{display:block;margin:10px 18px 0;border-top:1px solid var(--line);font-size:0;overflow:hidden}}@media(min-width:1200px){.od-tabs{grid-template-rows:repeat(5,44px) 46px repeat(3,44px)}.od-tabs-sep{display:flex;align-items:flex-end;margin:10px 0 4px;padding:0 12px 6px;border-top:1px solid var(--line);font-size:11px;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;color:var(--muted)}}@media(min-width:1024px){body .od-tabview .od-wrap{max-width:1180px;padding-inline:32px}.od-head h1{font-size:32px}.mh{max-inline-size:none}.mh:not(.mh-prob) .mh-h1{font-size:36px}.mh-accl{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;align-items:start}.mh-accl .mh-ch.open{grid-column:1/-1}.mh-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.mh-actions .btn{min-block-size:46px;padding-inline:20px}body .od-tabview .od-wrap:has(.mh-prob){max-width:1760px}.mh-prob{display:grid;grid-template-columns:minmax(0,1fr) clamp(300px,28%,420px);column-gap:28px;row-gap:0;align-items:start}.mh-prob>[data-mh-board],.mh-prob .mv,.mh-prob .mv>[data-drill],.mh-prob .drill{display:contents}.mh-prob>*,.mh-prob .mv>*,.mh-prob .drill>*{grid-column:2;min-inline-size:0}.mh-prob .mh-top{grid-column:1/-1;grid-row:1;margin:0 0 14px}.mh-prob .board{grid-column:1;grid-row:2 / span 60;align-self:start;position:sticky;inset-block-start:8px;inline-size:100%;aspect-ratio:640/420;min-block-size:0;max-block-size:calc(100dvh - 190px);display:grid;place-items:stretch}.mh-prob .board svg{inline-size:100%;block-size:100%;display:block}.mh-prob .board-bar{grid-column:1;grid-row:62;margin-block-start:10px}.mh-prob .mh-solved{order:1;margin:0 0 12px;padding:14px 16px;font-size:16px}.mh-prob .drill-head{order:2;margin:0 0 8px}.mh-prob .drill-head h3{font-size:22px;line-height:1.2}.mh-prob .drill-head .eyebrow{margin:0 0 2px}.mh-prob .drill-overall{order:3;margin:0 0 10px}.mh-prob .drill-prompt{order:4;margin:0 0 10px;min-height:0;font-size:15px}.mh-prob .drill>.od-more{order:4;margin:-6px 0 10px}.mh-prob .drill-actions:has([data-a=nextmech]){display:none}.mh-prob .guided-first{order:5}.mh-prob .drill-feedback{order:6;margin:0 0 10px}.mh-prob .drill-rescue{order:7}.mh-prob .drill-actions{order:8;margin:0 0 12px}.mh-prob .mh-foot{order:9;margin:0 0 16px;padding:14px 0 16px;border-block:1px solid var(--line)}.mh-prob .mv-fade{order:10;margin:0 0 8px}.mh-prob .mv-bar{order:11;margin:0 0 10px}.mh-prob .player{order:12;margin:0 0 12px}.mh-prob [data-cation-host]{order:13}.mh-prob .mv-after{order:14;margin:0 0 12px}.mh-prob .kbd{order:15;margin:0 0 10px}.mh-prob .od-report-row{order:16;margin:4px 0 0}.mh-prob.is-done .mh-foot{border-color:var(--accent);background:var(--accent-soft);border-radius:14px;padding:14px}.mh-prob.is-done .mh-foot .btn.primary{flex:1.6;font-size:16px}.mh-prob:has(.nm){display:block;max-inline-size:960px}.od-wrap .od-units{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;align-items:start}.od-wrap .od-units li{min-inline-size:0}.od-wrap .od-units li.od-sub{margin-inline-start:0;margin-block-start:0;padding-inline-start:10px}.od-wrap [data-view]:has(>.od-card.od-due){display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:14px;row-gap:12px;align-items:stretch}.od-wrap [data-view]:has(>.od-card.od-due)>*{min-inline-size:0;margin-block:0}.od-wrap [data-view]:has(>.od-card.od-due)>.od-head,.od-wrap [data-view]:has(>.od-card.od-due)>.od-goal,.od-wrap [data-view]:has(>.od-card.od-due)>.od-card.od-due,.od-wrap [data-view]:has(>.od-card.od-due)>.od-note,.od-wrap [data-view]:has(>.od-card.od-due)>.od-exams{grid-column:1/-1}.od-wrap [data-view]:has(>.od-card.od-due)>.od-head{margin-block-end:2px}.od-wrap [data-view]:has(>.od-card.od-due)>.od-card{margin:0}.od-wrap .mt-list{gap:12px}.od-wrap .mt-game{max-inline-size:1240px}.od-wrap .mt-board{grid-template-columns:minmax(0,340px) minmax(0,1fr);gap:28px}.od-wrap .mt-term{font-size:17px}.od-wrap .mt-def{font-size:16px}.od-wrap .mt-term,.od-wrap .mt-def{min-block-size:72px}.od-wrap .cs-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;align-items:start}.od-wrap .cs-row,.od-wrap .cs-row.locked{grid-template-columns:36px minmax(0,1fr) auto;grid-template-areas:"n t tag" "n act act";padding:14px 16px}.od-wrap .cs-row .cs-n{align-self:start}.od-wrap .cs-act{justify-content:flex-start}.od-sv-panel{inline-size:min(1040px,100%)}.od-mgrid{grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:10px}.od-mstage{min-height:520px}body .od-tabview .od-wrap:has(.od-session){max-width:1040px}.od-session{padding:22px 26px 24px}.od-q h2{font-size:22px}.od-q .quiz-option{font-size:16px;min-height:56px}.od-q .runner-figure>svg,.od-q .runner-figure .rxn-fig svg{max-height:290px}.od-q .runner-figure>svg[viewBox]:not([width]){width:min(100%,520px)}.od-q .fig-options .quiz-option{min-height:190px}.od-q .fig-options .opt-fig svg{max-height:160px}.od-cardface{min-height:360px}.od-why-cap{font-size:17px}}@media(min-width:1200px){.od-q:has(>.runner-figure):has(>.quiz-options:not(.fig-options)){display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);column-gap:28px;align-items:start}.od-q:has(>.runner-figure):has(>.quiz-options:not(.fig-options))>*{grid-column:1/-1;min-inline-size:0}.od-q:has(>.runner-figure):has(>.quiz-options:not(.fig-options))>.runner-figure{grid-column:1;margin:0}.od-q:has(>.runner-figure):has(>.quiz-options:not(.fig-options))>.quiz-options{grid-column:2}}@media(min-width:1280px){.od-wrap .mt-list{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(min-width:1440px){body .od-tabview .od-wrap{max-width:1360px;padding-inline:40px}body .od-tabview .od-wrap:has(.db){max-inline-size:1400px;padding-inline:40px}.db{grid-template-columns:minmax(0,1fr) clamp(320px,24vw,400px);gap:28px}.db-draw{min-block-size:360px}.db-draw-body{padding:32px 34px}.db-draw h2{font-size:38px}.db-draw-sub{font-size:17px}.db-opts{gap:14px}.db-opt{padding:20px}.db-opt-t b{font-size:17px}.db-opt-t small{font-size:14px}.db-card{padding:22px 24px}.db-stat dd{font-size:24px}.db-sec{font-size:28px}body .od-tabview .od-wrap:has(.db) .pl-list{gap:16px}.od-wrap [data-view]:has(>.od-card.od-due){grid-template-columns:repeat(3,minmax(0,1fr))}body .od-tabview .od-wrap:has(.pc-side){max-inline-size:1320px}.od-tabview .pc{max-inline-size:min(960px,calc(100% - 256px))}.od-tabview .pc-side{inline-size:236px;font-size:15px}.od-tabview .pc-vis:not(.pc-draw):not(.pc-play){min-block-size:430px;block-size:430px;max-block-size:430px}.od-tabview .pc-vis:not(.pc-draw):not(.pc-play) svg{max-block-size:400px}.od-tabview .pc-vis:not(.pc-draw):not(.pc-play)>svg.sk-svg{block-size:400px;max-block-size:400px}.od-tabview .pc-vis:not(.pc-draw):not(.pc-play)>svg:not(.sk-svg){inline-size:min(100%,720px);max-block-size:400px}.od-tabview .pc-cap{font-size:19px}body .od-tabview .od-wrap:has(.od-session){max-width:1120px}.od-q h2{font-size:24px}.od-sv-panel{inline-size:min(1160px,100%)}.od-mstage{min-height:600px}.mh-prob .drill-head h3{font-size:24px}}@media(min-width:1600px){.mh-list,.od-wrap .od-units{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(min-width:1800px){body .od-tabview .od-wrap:has(.db) .pl-list{grid-template-columns:repeat(4,minmax(0,1fr))}.od-wrap .mt-list{grid-template-columns:repeat(4,minmax(0,1fr))}.od-wrap .cs-list{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(min-width:1920px){body .od-tabview .od-wrap{max-width:1600px;padding-inline:48px}body .od-tabview .od-wrap:has(.db){max-inline-size:1600px;padding-inline:48px}.db{grid-template-columns:minmax(0,1fr) clamp(360px,22vw,440px);gap:32px}.db-draw{min-block-size:420px}.db-draw h2{font-size:42px}.db-draw-sub{font-size:18px}.db .db-cta{min-height:60px;font-size:18px}.db-opt-t b{font-size:18px}.db-stat dd{font-size:28px}.db-sec{font-size:30px}body .od-tabview .od-wrap:has(.mh-prob){max-width:1900px}.mh-prob{grid-template-columns:minmax(0,1fr) 440px;column-gap:36px}.mh-prob .board{aspect-ratio:640/400}.mh-prob .drill-prompt,.mh-prob .drill-feedback{font-size:16px}body .od-tabview .od-wrap:has(.pc-side){max-inline-size:1440px}.od-tabview .pc{max-inline-size:min(1040px,calc(100% - 256px))}.od-tabview .pc-vis:not(.pc-draw):not(.pc-play){min-block-size:480px;block-size:480px;max-block-size:480px}.od-tabview .pc-vis:not(.pc-draw):not(.pc-play) svg,.od-tabview .pc-vis:not(.pc-draw):not(.pc-play)>svg.sk-svg,.od-tabview .pc-vis:not(.pc-draw):not(.pc-play)>svg:not(.sk-svg){max-block-size:450px}.od-tabview .pc-vis:not(.pc-draw):not(.pc-play)>svg.sk-svg{block-size:450px}.od-tabview .pc-cap{font-size:20px}body .od-tabview .od-wrap:has(.od-session){max-width:1200px}.od-session{padding:26px 32px 28px}.od-q h2{font-size:26px}.od-q .quiz-option{font-size:17px;min-height:60px}.od-cardface{min-height:420px}.od-sv-panel{inline-size:min(1280px,100%)}.od-mstage{min-height:680px}.od-wrap .mt-board{grid-template-columns:minmax(0,400px) minmax(0,1fr)}}@media(min-width:2200px){body .od-tabview .od-wrap{max-width:1760px}body .od-tabview .od-wrap:has(.db){max-inline-size:1760px}.db-draw{min-block-size:460px}.db-draw h2{font-size:46px}}@media(min-width:1920px){.od-landing{max-inline-size:1560px;padding-inline:72px}}@media(min-width:2400px){.od-landing{max-inline-size:1720px}}.od-finals-sub{color:var(--muted);font-size:14px;margin:-6px 0 10px;max-width:60ch}.od-finals{display:grid;grid-template-columns:minmax(0,1fr);gap:10px;margin:0 0 16px}@media(min-width:768px){.od-finals{grid-template-columns:repeat(3,minmax(0,1fr))}}.od-final{display:grid;gap:6px;width:100%;min-width:0;min-height:104px;padding:14px 16px;text-align:start;color:var(--text);background:var(--panel);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);touch-action:manipulation}.od-final:hover{border-color:var(--accent)}.od-final:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.od-final.locked{opacity:.7}.od-final-t{display:flex;align-items:center;gap:6px;font-size:16px;font-weight:600}.od-final-t .od-lock{width:16px;height:16px}.od-final-n{color:var(--muted);font-size:13px;font-variant-numeric:tabular-nums}.od-final-s{display:flex;justify-content:space-between;gap:10px;margin-top:4px;padding-top:8px;border-top:1px solid var(--line);color:var(--muted);font-size:13px;font-variant-numeric:tabular-nums}.od-final-s b{color:var(--text);font-weight:600}.od-final-s b[data-final-best]{color:var(--accent)}.od-end .od-sess-actions{flex-wrap:wrap}.od-end .od-retake{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}.db{display:grid;gap:14px;margin:4px 0 0}.db-main,.db-side{display:grid;gap:14px;align-content:start;min-inline-size:0}.db-card,.db-draw{background:var(--panel);border:1px solid var(--line);border-radius:18px;box-shadow:var(--card-shadow,var(--shadow))}.db-draw{display:grid;overflow:hidden;border-color:color-mix(in srgb,var(--accent) 38%,var(--line))}.db-draw-art{min-inline-size:0;background:var(--canvas);border-block-end:1px solid var(--line)}.db-draw-body{display:grid;gap:6px;padding:16px 18px 18px}.db-eyebrow{margin:0;font-size:12px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--accent)}.db-draw h2{margin:0;font:400 28px/1.15 var(--serif,Georgia,serif);letter-spacing:-.02em;color:var(--text)}.db-draw-sub{margin:0;font-size:15px;line-height:1.45;color:var(--text);text-wrap:pretty}.db-draw-meta{margin:2px 0 0;font-size:13px;color:var(--muted)}.db-draw-meta b{color:var(--accent)}.db-draw-act{display:grid;gap:4px;margin-block-start:8px}.db .db-cta{display:flex;justify-content:center;align-items:center;gap:8px;inline-size:100%;min-height:54px;margin:0;font-size:17px;border-radius:14px}.db-arrow{display:inline-block;transition:transform .15s}.db-cta:hover .db-arrow,.db-opt:hover .db-arrow,.db-due:hover .db-arrow{transform:translate(3px)}.db .db-firststep{margin:4px 0 0}.db-link{justify-self:center;min-height:44px;padding:0 8px;border:0;background:none;font:inherit;font-size:14px;font-weight:600;color:var(--accent);text-decoration:underline;text-underline-offset:3px;cursor:pointer}.db-opts{display:grid;gap:8px}.db-opt{display:flex;align-items:center;gap:12px;inline-size:100%;min-height:64px;padding:10px 14px;text-align:start;font:inherit;color:var(--text);background:var(--panel);border:1px solid var(--line);border-radius:14px;cursor:pointer}.db-opt:hover{border-color:color-mix(in srgb,var(--accent) 45%,var(--line))}.db-opt:focus-visible,.db-due:focus-visible,.db-link:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.db-opt-i{flex:none;display:grid;place-items:center;inline-size:40px;block-size:40px;border-radius:11px;background:var(--accent-soft);color:var(--accent)}.db-opt-t{flex:1;min-inline-size:0;display:grid;gap:1px}.db-opt-t b{font-size:16px}.db-opt-t small{font-size:13px;line-height:1.35;color:var(--muted)}.db-opt-m{flex:none;display:flex;align-items:center;gap:6px;font-size:12px;font-weight:600;color:var(--muted);white-space:nowrap}.db-opt-m .db-arrow{color:var(--accent);font-size:15px}.db-match{display:flex;align-items:center;gap:12px;inline-size:100%;min-height:56px;padding:8px 14px;text-align:start;font:inherit;color:var(--text);background:var(--panel);border:1px solid var(--line);border-radius:14px;cursor:pointer}.db-match:hover{border-color:color-mix(in srgb,var(--accent) 45%,var(--line))}.db-match:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.db-match .db-opt-i{inline-size:34px;block-size:34px;border-radius:10px}.db-match .db-opt-i svg{inline-size:19px;block-size:19px}.db-match .db-opt-t b{font-size:15px}.db-match:hover .db-arrow{transform:translate(3px)}.db-card{padding:16px 18px}.db-h{margin:0 0 10px;font-size:12px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}.db-stats{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:0}.db-stat{padding:10px 12px;border-radius:12px;background:var(--soft)}.db-stat dt{font-size:12px;color:var(--muted)}.db-stat dd{margin:2px 0 0;font-size:22px;font-weight:700;font-variant-numeric:tabular-nums;color:var(--text)}.db-stat dd small{font-size:13px;font-weight:500;color:var(--muted)}.db-stats.is-empty dd{color:var(--muted)}.db-week{display:flex;gap:6px;margin:12px 0 0}.db-week i{flex:1;display:grid;place-items:center;block-size:26px;border-radius:7px;background:var(--soft);font-style:normal;font-size:11px;font-weight:700;color:var(--muted)}.db-week i.on{background:var(--accent);color:var(--panel)}.db-week i.now{box-shadow:inset 0 0 0 1.5px var(--accent)}.db-empty{margin:10px 0 0;font-size:13px;line-height:1.4;color:var(--muted)}.db-due{display:flex;align-items:center;gap:10px;inline-size:100%;min-height:48px;margin:12px 0 0;padding:8px 12px;font:inherit;font-size:14px;text-align:start;color:var(--text);background:var(--accent-soft);border:1px solid var(--line);border-radius:12px;cursor:pointer}.db-due svg{flex:none;inline-size:20px;block-size:20px;color:#b8503a;stroke-width:1.8}.db-due span{flex:1}.db-due .db-arrow{flex:none;color:var(--accent)}.db-trial{margin:12px 0 0;font-size:13px;line-height:1.5;color:var(--muted)}.db-next{display:grid;gap:3px}.db-next-k{margin:0;font-size:12px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}.db-next-t{margin:4px 0 0;font-size:17px;font-weight:700;line-height:1.3}.db-next-s{margin:0;font-size:13px;color:var(--muted);line-height:1.4}.db-next-row{display:grid;gap:8px;margin-block-start:10px}.db-next>.db-next-btn{margin-block-start:10px}.db-next .btn,.db-next .pl-cont{inline-size:100%;min-height:48px;margin:0;font-size:15px;border-radius:12px}.db-sec{display:flex;align-items:baseline;gap:10px;margin:26px 4px 0;font:400 22px/1.2 var(--serif,Georgia,serif);letter-spacing:-.01em;scroll-margin-block-start:16px;outline:0}.db-sec small{font:500 13px/1 Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Arial,sans-serif;color:var(--muted)}.od-tabview .od-wrap:has(.db) .pl-div:first-of-type{margin-block-start:10px}@media(min-width:768px){.od-tabview .od-wrap:has(.db){max-inline-size:960px;padding-inline:28px}.db,.db-main{gap:18px}.db-draw{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr)}.db-draw-art{display:grid;align-items:center;border-block-end:0;border-inline-end:1px solid var(--line)}.db-draw-body{align-content:center;padding:24px 26px}.db-draw h2{font-size:32px}.db-opts{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.db-opt{flex-direction:column;align-items:flex-start;gap:10px;min-height:0;padding:16px}.db-opt-m{margin-block-start:auto}.db-side{grid-template-columns:1fr 1fr;gap:18px}.db-sec{margin-block-start:36px;font-size:26px}.od-tabview .od-wrap:has(.db) .pl-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.od-tabview .od-wrap:has(.db) .pl-list>li{display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--line);border-radius:16px;transition:border-color .15s,box-shadow .15s}.od-tabview .od-wrap:has(.db) .pl-list>li:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--line));box-shadow:var(--card-shadow,var(--shadow))}.od-tabview .od-wrap:has(.db) .pl-list>li:has(.pl-row.current){border:2px solid var(--accent);background:var(--accent-soft)}.od-tabview .od-wrap:has(.db) .pl-list .pl-row{flex:1;align-items:flex-start;min-height:84px;padding:14px 16px;border:0;border-radius:16px;background:none;box-shadow:none}.od-tabview .od-wrap:has(.db) .pl-list .pl-row.current{border:0;background:none;box-shadow:none}.od-tabview .od-wrap:has(.db) .pl-list .pl-tt{flex:1;min-inline-size:0;display:grid;gap:3px;padding-block-start:2px}.od-tabview .od-wrap:has(.db) .pl-list .pl-s{align-self:flex-start;padding-block-start:4px}.od-tabview .od-wrap:has(.db) .pl-list .pl-sheet{align-self:flex-start;margin:-10px 0 6px 72px;min-block-size:36px}.od-tabview .od-wrap:has(.db) .pl-free{display:inline-block;padding:2px 8px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:12px;font-weight:700}.od-tabview .od-wrap:has(.db) .pl-list>li:has(.pl-row.current) .pl-free{background:var(--panel)}.od-tabview .od-wrap:has(.db) .pl-div{margin:26px 4px 12px}.od-wrap:has(.db) .pl-map,.od-wrap:has(.db) .pl-help,.od-tabview .od-wrap:has(.db) .pl-legal{margin-inline:4px}}@media(min-width:1024px){.od-tabview .od-wrap:has(.db){max-inline-size:1180px;padding:32px 40px 56px}.od-tabview .od-wrap:has(.db) .pl-head h1{font:400 34px/1.15 var(--serif,Georgia,serif);letter-spacing:-.02em}.od-tabview .od-wrap:has(.db) .pl-sub{margin:4px 0 22px;font-size:16px}.db-main{gap:20px}.db-draw{min-block-size:300px}.db-draw-body{padding:28px 30px}.db-draw h2{font-size:32px}.db-draw-sub{font-size:16px}.db-draw-act{justify-items:start}.db .db-cta{inline-size:auto;min-inline-size:220px;padding-inline:26px}.db-link{justify-self:start;padding:0}.db .db-firststep{text-align:start;margin-inline:2px}.db-card{padding:20px 22px}.od-tabview .od-wrap:has(.db) .pl-list{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}}@media(min-width:1024px)and (max-width:1199px){.od-tabview .od-wrap:has(.db){max-inline-size:960px}.od-tabview .od-wrap:has(.db) .pl-list{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(min-width:1200px){.db{grid-template-columns:minmax(0,1fr) clamp(290px,24vw,340px);gap:24px;align-items:start}.db-draw{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.db-draw-body{padding:26px 24px}.db-draw h2{font-size:30px}.db-side{grid-template-columns:1fr;gap:20px;position:sticky;inset-block-start:24px}}@media(min-width:1400px){.db-draw{grid-template-columns:minmax(0,1.1fr) minmax(0,1fr)}.db-draw-body{padding:28px 30px}.db-draw h2{font-size:34px}}@media(prefers-reduced-motion:reduce){.db-arrow{transition:none}.db-cta:hover .db-arrow,.db-opt:hover .db-arrow,.db-due:hover .db-arrow{transform:none}}.db-tools{display:flex;flex-wrap:wrap;align-items:center;gap:4px 14px;margin:10px 2px 0;font-size:13px;color:var(--muted)}.db-tools>span{font-weight:600}.db-tools button{display:inline-flex;align-items:center;gap:6px;min-block-size:36px;padding:0 2px;border:0;background:none;font:inherit;font-weight:600;color:var(--accent);cursor:pointer;text-decoration:underline;text-decoration-color:color-mix(in srgb,currentColor 35%,transparent);text-underline-offset:3px}.db-tools button:hover{text-decoration-color:currentColor}.db-tools svg{inline-size:16px;block-size:16px}.db-tools button:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}.od-appbar{justify-content:space-between}.pd-footer{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:40px;border-top:1px solid var(--line);padding-top:14px;font-size:12px;color:var(--muted)}.pd-small{font-size:15px;line-height:1.5;color:var(--muted)}.pd-full{width:100%}.pd-section-title{font:400 25px/1.2 var(--serif);margin:28px 0 14px}.pd-back{margin:0 0 18px;padding-left:0;font-size:14px}.pd-molecule{padding:28px 16px;text-align:center}.pd-molecule svg{width:100%;height:auto;max-height:270px;margin:auto}.pd-molecule>p:last-child{font-size:12px;color:var(--muted);margin:10px 0 0}.db-draw-art{place-items:center}.db-tools{margin:0}.db-card p{margin:8px 0 12px}.pl-div{display:flex;align-items:center;justify-content:space-between}.pl-div small{font-size:12px;font-weight:400;color:var(--muted);letter-spacing:0;text-transform:none}.pl-list{grid-template-columns:1fr}.pl-list>li{border:1px solid var(--line);border-radius:15px;background:var(--panel);overflow:hidden}.pl-list .pl-row{width:100%;background:none;border:0}.pl-tt{display:grid;gap:4px}.pl-c{font-size:12px;color:var(--muted)}.pl-list li:hover{border-color:var(--accent)}.pd-lesson-layout{display:grid;gap:24px}.pd-lesson{min-width:0}.pd-lesson-tabs{display:flex;gap:8px;margin-bottom:18px;overflow:auto;padding-bottom:5px}.pd-lesson-tabs button{min-width:110px;flex:1;display:grid;gap:6px;padding:12px;border-top:2px solid var(--line);color:var(--muted);text-align:left}.pd-lesson-tabs button.on{border-color:var(--accent);background:var(--accent-soft);color:var(--accent);border-radius:0 0 8px 8px}.pd-lesson-tabs span{font-size:12px}.pd-reading{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:26px 28px;margin-bottom:18px}.pd-reading h2{font:400 28px/1.25 var(--serif);margin:4px 0 18px}.pd-reading p{white-space:pre-line;font-size:17px;line-height:1.75}.pd-reading .db-eyebrow{font-size:11px}.pd-example{margin-top:24px;padding:18px 22px;border-radius:14px;background:var(--soft)}.pd-example h3{font-size:14px;margin:0 0 8px}.pd-example p{font-size:16px;margin:0}.pd-lesson-side{align-self:start}.pd-lesson-side .btn{width:100%;margin-top:9px;min-height:46px}.pd-activity-grid{display:grid;grid-template-columns:1fr;gap:12px}.pd-activity-card{display:grid;grid-template-columns:40px 1fr;gap:6px 12px;align-content:start;text-align:left;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:var(--shadow);color:var(--text);min-width:0}.pd-activity-card:hover{border-color:var(--accent)}.pd-activity-card .db-opt-i{grid-column:1;grid-row:1/3}.pd-activity-type{font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}.pd-activity-card b{grid-column:2;font-size:18px}.pd-activity-card small{grid-column:1/-1;font-size:14px;line-height:1.5;color:var(--muted);margin-top:8px}.pd-activity-bottom{grid-column:1/-1;font-size:13px;color:var(--accent);margin-top:12px}.pd-why{border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-top:14px}.pd-why summary{font-weight:600;color:var(--accent);cursor:pointer;min-height:26px}.pd-why p{margin:12px 0 0;font-size:16px;line-height:1.6}.quiz-option:disabled{opacity:1;cursor:default}.pd-final-review{margin-top:26px}.pd-final-review details{padding:16px;border:1px solid var(--line);border-radius:12px;background:var(--panel);margin:10px 0}.pd-final-review summary{cursor:pointer;font-weight:600}.pd-final-review p{line-height:1.6}.od-end h2{font:400 64px/1.2 var(--serif);margin:12px}.pd-review-grid{display:grid;grid-template-columns:1fr;gap:14px}.pd-review-grid h2{font:400 24px/1.2 var(--serif);margin:0}.pd-review-grid p{font-size:14px;color:var(--muted)}.pd-match-status{font-size:14px;color:var(--accent);margin:0;min-height:24px}.cs-list .cs-row{list-style:none}.cs-tag{font-size:10px;color:var(--muted)}.pd-sheet{max-width:1000px;margin:auto;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:30px 36px}.pd-sheet h1{font:400 34px/1.2 var(--serif);margin:8px 0 24px}.pd-sheet h2{font:400 23px/1.3 var(--serif);margin:0 0 8px}.pd-sheet section{border-top:1px solid var(--line);padding:18px 0 6px;break-inside:avoid}.pd-sheet p{white-space:pre-line;line-height:1.7}.pd-preview-controls{border-top:1px solid var(--line);padding-top:14px;margin-top:20px;font-size:13px}.pd-preview-controls summary{cursor:pointer;color:var(--muted)}.pd-preview-controls p{margin-top:10px!important}.pd-preview-controls .od-row{margin-top:10px}.od-sess-top{gap:16px}.od-sess-top>span:last-child{white-space:nowrap}.od-tabs-sep{grid-row:6}.od-tab-sec{grid-row:auto}@media(min-width:768px){.pd-activity-grid,.pl-list{grid-template-columns:repeat(2,minmax(0,1fr))}.pd-review-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(min-width:1024px){.od-mtop{display:none}.pd-lesson-layout{grid-template-columns:minmax(0,1fr) 280px}.pd-activity-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.od-tabview .od-wrap:has(.pl-list){max-inline-size:1360px}.pd-reading{padding:32px 38px}}@media(min-width:1440px){.pl-list{grid-template-columns:repeat(3,minmax(0,1fr))}.pd-lesson-layout{grid-template-columns:minmax(0,1fr) 340px;gap:32px}.pd-activity-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}@media(min-width:1920px){.pl-list{grid-template-columns:repeat(4,minmax(0,1fr))}}@media(max-width:767px){.od-mbrand b{font-size:20px}.od-topend{gap:5px}.pd-molecule{padding:12px 20px}.pd-molecule svg{max-height:185px}.pd-molecule>p:last-child{margin:0}.pd-molecule>.db-eyebrow{font-size:10px}.pd-reading{padding:20px}.pd-reading h2{font-size:25px}.pd-reading p{font-size:16px}.pd-example{padding:15px}.pd-sheet{padding:22px 18px}.pd-sheet h1{font-size:28px}.pd-footer{display:grid;gap:5px}.pd-review-grid .db-card{margin:0}.pd-section-title{font-size:24px}}@media print{html,body{overflow:visible!important;height:auto!important;background:#fff!important;color:#111!important}.od-appbar,.od-tabs,.od-mtop,.pd-footer,.pd-no-print,#od-more,dialog,.od-sticky,.od-toast,.od-save-card{display:none!important}.od-tabview{position:static!important;overflow:visible!important;max-height:none!important}.od-wrap{padding:0!important;max-width:none!important}body.od-has-tabs{padding:0!important}.pd-sheet{padding:0;border:0;box-shadow:none;background:#fff;color:#111;max-width:none}.pd-sheet section{break-inside:avoid}.pd-sheet h1{font-size:25pt}.pd-sheet p{font-size:11pt}}.pd-track{display:flex;align-items:center;justify-content:flex-end;gap:12px;margin:0 0 24px;font-size:12px;color:var(--muted)}.pd-track>div{display:flex;background:var(--soft);border:1px solid var(--line);border-radius:999px;padding:3px}.pd-track button{padding:8px 15px;min-height:36px;border-radius:999px;font-size:12px;color:var(--muted)}.pd-track button[aria-pressed=true]{background:var(--accent);color:var(--on-accent,#fff)}.pd-calc-note{border-left:3px solid var(--accent);padding:12px 18px;background:var(--accent-soft);border-radius:0 12px 12px 0;margin-top:20px}.pd-calc-note h3{font-size:14px;margin:0}.pd-calc-note p{font-size:16px;margin:8px 0 0}.od-session .od-q h2{line-height:1.45}.pd-molecule>svg{display:block}.quiz-option{min-height:58px}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:3px}@media(max-width:767px){.pd-track{justify-content:space-between;margin-bottom:21px;gap:6px}.pd-track button{padding:8px 11px}.pl-div small{white-space:nowrap}.pl-div{gap:12px}.pl-div>span{max-width:70%}}@media(min-width:1024px){.od-wrap [data-view]:has(>.od-card.od-due){display:flex;flex-direction:column;gap:20px}.od-wrap [data-view]:has(>.od-card.od-due)>.pd-review-grid{width:100%}.od-wrap [data-view]:has(>.od-card.od-due)>.pd-activity-grid{width:100%}}@media(min-width:1920px){.od-tabview .od-wrap:has(.pl-list){max-inline-size:1600px}}.pd-activity-card b,.pd-activity-card small,.quiz-option>span:last-child{min-width:0;overflow-wrap:anywhere}.dark .pd-track button[aria-pressed=true]{color:var(--bg)}.pd-activity-card.locked,.mt-row.locked,.cs-row.locked,.od-final.locked{opacity:.72}.pd-activity-card.locked .pd-activity-bottom,.mt-row.locked .mt-go,.cs-row.locked .cs-tag,.od-final.locked b{color:var(--muted)}.od-lock{inline-size:14px;block-size:14px;display:inline-block;vertical-align:-2px;margin-inline-end:4px}.od-save-note{color:var(--muted)}.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.od-sess-top .od-sess-h{flex:1;margin:0;font:inherit;color:inherit;letter-spacing:inherit}body{background:var(--bg)}.od-landing{max-inline-size:1240px;margin:0 auto;padding:0 40px;color:var(--text);isolation:isolate;position:relative}.od-landing,.od-landing *{box-sizing:border-box}body.od-landing-on{padding-block-end:0!important;overflow-x:hidden;overflow-y:auto!important}body.od-landing-on .od-tabs,body.od-landing-on .od-sticky,body.od-landing-on .od-tabview,body.od-landing-on .od-appbar,body.od-landing-on .od-account-float,body.od-landing-on .od-a2hs,.od-landing[hidden]{display:none!important}.od-landing:before{content:"";position:absolute;z-index:-2;inset:0 calc(50% - 50vw) auto;block-size:850px;pointer-events:none;background:radial-gradient(ellipse at 75% 27%,color-mix(in srgb,var(--accent) 11%,transparent),transparent 55%),radial-gradient(ellipse at 5% 30%,color-mix(in srgb,var(--accent) 4%,transparent),transparent 50%)}.od-landing:after{content:"";position:absolute;z-index:-1;inset:80px -20px auto 50%;block-size:600px;pointer-events:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='72' height='124' viewBox='0 0 72 124'%3E%3Cpath d='M36 1 71 21v41L36 83 1 62V21ZM1 62l35 21v40M71 62 36 83M36 1V0M1 21 0 20M71 21l1-1' fill='none' stroke='%2388a887' stroke-width='.7'/%3E%3C/svg%3E");opacity:.12;mask-image:radial-gradient(ellipse,black,transparent 73%)}.od-land-header{block-size:100px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line)}.od-land-brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);min-block-size:44px;border-radius:8px;flex-shrink:0}.od-land-brand>span{display:grid;place-items:center;inline-size:34px;block-size:36px;color:var(--accent)}.od-land-brand svg{inline-size:30px;block-size:30px;stroke-width:1.8}.od-land-brand b{font:400 25px/1.1 var(--serif,Georgia,serif);letter-spacing:-.7px}.od-land-header nav{display:flex;align-items:center;gap:26px}.od-land-header nav>a{display:inline-flex;align-items:center;gap:8px;min-block-size:44px;font-size:13px;font-weight:550;text-decoration:none;color:var(--muted)}.od-land-header nav>a:hover{color:var(--text)}.od-land-header .od-land-open svg{inline-size:16px;block-size:16px}.od-land-header .od-theme-btn{border:0;background:transparent;color:var(--muted);margin-inline:-12px}.od-landing .od-land-cta{display:inline-flex;align-items:center;justify-content:center;gap:28px;min-block-size:56px;border:1px solid color-mix(in srgb,var(--accent) 80%,var(--text));padding:0 24px;border-radius:12px;background:linear-gradient(155deg,color-mix(in srgb,var(--accent) 87%,white),var(--accent) 65%,color-mix(in srgb,var(--accent) 86%,black));box-shadow:0 1px #ffffff30 inset,0 4px color-mix(in srgb,var(--accent) 55%,black),0 12px 26px -12px color-mix(in srgb,var(--accent) 60%,transparent);color:#fffdf6;font:650 15px/1.2 Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;text-decoration:none;cursor:pointer;transition:transform .18s,box-shadow .18s,filter .18s}.dark .od-landing .od-land-cta{color:var(--bg)}.od-land-cta svg{inline-size:20px;block-size:20px;stroke-width:2}.od-landing .od-land-cta:hover{transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 1px #ffffff40 inset,0 5px color-mix(in srgb,var(--accent) 55%,black),0 16px 30px -12px color-mix(in srgb,var(--accent) 60%,transparent)}.od-landing .od-land-cta:active{transform:translateY(1px)}.od-landing :is(a,button,summary):focus-visible{outline:3px solid var(--accent);outline-offset:5px;border-radius:8px}.od-landing .od-land-nav-cta{min-block-size:42px;padding-inline:17px;font-size:12px;gap:14px;border-radius:9px;box-shadow:0 1px #ffffff25 inset,0 2px color-mix(in srgb,var(--accent) 55%,black)}.od-land-nav-cta svg{inline-size:16px;block-size:16px}.od-land-hero{display:grid;grid-template-columns:minmax(0,1.13fr) minmax(0,1fr);align-items:center;gap:70px;padding:82px 0 72px}.od-landing .od-land-eyebrow{margin:0 0 22px;display:flex;align-items:center;gap:9px;color:var(--accent);font-size:11px;font-weight:650;text-transform:uppercase;letter-spacing:.13em}.od-land-eyebrow>span{inline-size:6px;block-size:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}.od-landing h1{font:400 clamp(42px,4.65vw,64px)/1.06 var(--serif,Georgia,serif);letter-spacing:-2.6px;margin:0 0 24px}.od-landing h1 em{font-style:normal;color:var(--accent)}.od-land-sub{font-size:17px;line-height:1.7;color:var(--muted);margin:0 0 28px;letter-spacing:-.15px}.od-land-actions{display:flex;flex-direction:column;align-items:flex-start;gap:14px}.od-land-actions>span{font-size:12px;color:var(--muted);padding-inline:2px}.od-land-trialbar{position:sticky;top:0;z-index:30;margin-inline:calc(50% - 50vw);padding:7px 16px;text-align:center;font-size:13px;line-height:1.5;color:var(--muted);background:var(--panel);border-bottom:1px solid var(--line)}.od-land-trialbar[hidden]{display:none}.od-land-trialbar strong{color:var(--text)}.od-land-trialbar a{color:var(--accent);font-weight:600;text-underline-offset:3px;white-space:nowrap}.od-land-actions>span strong{color:var(--text)}@media(max-width:480px){.od-land-trialbar{font-size:12px;padding-inline:10px}.od-land-trialbar .od-trial-pill{font-size:10px;padding:1px 7px}}.od-land-explore{display:inline-flex;gap:16px;align-items:center;min-block-size:44px;margin-top:15px;font-size:12px;color:var(--muted);text-underline-offset:5px;text-decoration:none}.od-land-explore span{color:var(--accent);font-size:18px}.od-land-demo{min-inline-size:0;padding:8px 3px 0 0}.od-land-demo-note{font-size:11px;text-align:center;color:var(--muted);margin:22px 0 0;letter-spacing:.02em}.od-land-trust{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;border-block:1px solid var(--line);padding:23px 0;font-size:12px;color:var(--muted)}.od-land-trust>span{display:flex;align-items:center;gap:10px}.od-land-trust svg{inline-size:18px;block-size:18px;color:var(--accent);stroke-width:1.7;flex:none}.od-land-section{padding-block:82px;border-bottom:1px solid var(--line);scroll-margin-top:30px}.od-land-section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin-bottom:34px}.od-landing h2{font:400 39px/1.13 var(--serif,Georgia,serif);letter-spacing:-1.2px;margin:0}.od-landing .od-land-section .od-land-eyebrow{margin-bottom:13px;font-size:10px}.od-land-section-head>p{font-size:14px;line-height:1.65;color:var(--muted);margin:0 0 3px;max-inline-size:40ch}.od-land-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.od-land-steps article{padding:26px;border:1px solid var(--line);border-radius:16px;background:linear-gradient(150deg,var(--panel),color-mix(in srgb,var(--panel) 70%,var(--soft)));box-shadow:0 1px #ffffff08 inset}.od-land-step-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}.od-land-step-top>span{font:400 26px/1 var(--serif,Georgia,serif);color:var(--muted)}.od-land-step-top>svg{inline-size:32px;block-size:32px;color:var(--accent);stroke-width:1.5}.od-land-steps h3,.od-land-features h3{font-size:16px;font-weight:600;letter-spacing:-.3px;margin:0 0 10px}.od-land-steps p,.od-land-features p{font-size:13px;line-height:1.7;color:var(--muted);margin:0;max-inline-size:34ch}.od-land-course+.od-land-course{margin-top:36px}.od-land-course-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:16px}.od-land-course-head h3{display:flex;align-items:center;gap:14px;font-size:18px;font-weight:600;margin:0;letter-spacing:-.4px}.od-land-course-head h3>span{font-size:10px;color:var(--accent);letter-spacing:.06em;border:1px solid var(--line);background:var(--accent-soft);padding:5px 7px;border-radius:5px}.od-land-course-head>p{font-size:12px;color:var(--muted);margin:0}.od-land-course-head p>span{padding-inline:8px;color:var(--line)}.od-roadmap-grid{list-style:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:0;padding:0}.od-roadmap-grid li{min-inline-size:0;display:flex}.od-roadmap-card{inline-size:100%;border:1px solid var(--line);border-radius:13px;background:var(--panel);padding:18px 20px;text-decoration:none;color:var(--text);transition:transform .18s,border-color .18s,box-shadow .18s}.od-roadmap-card:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--accent) 65%,var(--line));box-shadow:0 12px 25px -18px #0008}.od-roadmap-card.is-free{background:linear-gradient(140deg,var(--accent-soft),var(--panel));border-color:color-mix(in srgb,var(--accent) 45%,var(--line))}.od-roadmap-meta{display:flex;align-items:center;gap:8px;margin-bottom:13px}.od-roadmap-n{font-size:11px;font-weight:650;color:var(--muted);font-variant-numeric:tabular-nums}.od-roadmap-glyph{color:var(--accent);display:flex}.od-roadmap-glyph svg{inline-size:18px;block-size:18px;stroke-width:1.7}.od-roadmap-access{margin-inline-start:auto;display:flex;align-items:center;gap:5px;font-size:10px;color:var(--muted)}.od-roadmap-access svg{inline-size:12px;block-size:12px}.is-free .od-roadmap-access{padding:2px 8px;border-radius:5px;background:var(--accent-soft);color:var(--accent);font-weight:600;border:1px solid color-mix(in srgb,var(--accent) 25%,transparent)}.od-roadmap-card h4{font-size:14px;letter-spacing:-.2px;font-weight:600;line-height:1.35;margin:0 0 7px}.od-roadmap-card p{font-size:12px;line-height:1.55;color:var(--muted);margin:0}.od-land-features{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:26px}.od-land-features article>span{display:grid;place-items:center;inline-size:42px;block-size:42px;background:var(--accent-soft);border:1px solid var(--line);border-radius:12px;color:var(--accent);margin-bottom:22px}.od-land-features svg{inline-size:22px;block-size:22px;stroke-width:1.7}.od-land-features h3{font-size:14px}.od-land-features p{font-size:12px}.od-land-faq{display:grid;grid-template-columns:1fr 1.4fr;gap:60px}.od-land-questions details{border-bottom:1px solid var(--line)}.od-land-questions details:first-child{border-top:1px solid var(--line)}.od-land-questions summary{display:flex;align-items:center;justify-content:space-between;gap:16px;cursor:pointer;min-block-size:64px;padding:16px 0;font-size:14px;font-weight:550;list-style:none}.od-land-questions summary::-webkit-details-marker{display:none}.od-land-questions summary:after{content:"+";color:var(--accent);font-size:22px;font-weight:400}.od-land-questions details[open] summary:after{content:"−"}.od-land-questions p{font-size:13px;line-height:1.7;color:var(--muted);margin:0 26px 20px 0}.od-land-questions a{display:inline-flex;align-items:center;gap:12px;margin-bottom:20px;font-size:13px;color:var(--accent)}.od-land-questions a svg{inline-size:18px;block-size:18px}.od-landing .od-pricing{margin:0;padding-block:80px;scroll-margin-top:28px}.od-landing .od-pricing h2{margin-bottom:16px}.od-landing .od-price-lede{font-size:14px;color:var(--muted)}.od-landing .od-plans{gap:18px}.od-landing .od-plan{box-shadow:0 1px #ffffff0a inset,0 12px 28px -20px #0003;border-radius:17px;padding:28px 24px 24px}.od-landing .od-plan-hero{padding-top:52px}.od-landing .od-plan h3{font-size:12px}.od-landing .od-feats{list-style:none;padding:0;margin:10px 0 20px;display:grid;gap:10px;font-size:13px;color:var(--muted)}.od-landing .od-feats li{position:relative;padding-inline-start:22px;line-height:1.5}.od-landing .od-feats li:before{content:"";position:absolute;inset-inline-start:1px;top:.42em;inline-size:10px;block-size:6px;border-inline-start:2px solid var(--accent);border-block-end:2px solid var(--accent);transform:rotate(-48deg)}.od-landing .od-sem{max-inline-size:600px}.od-landing .od-anchor,.od-landing .od-trust,.od-landing .od-sem-what{font-size:12px;line-height:1.65;color:var(--muted)}.od-land-final{padding:64px 30px 70px;border:1px solid color-mix(in srgb,var(--accent) 28%,var(--line));border-radius:24px;background:radial-gradient(ellipse at 50% 0%,color-mix(in srgb,var(--accent) 14%,transparent),transparent 75%),var(--panel);text-align:center;margin-bottom:64px;position:relative}.od-land-final .od-land-eyebrow{justify-content:center;font-size:10px}.od-land-final h2{font-size:44px}.od-land-final>p:not(.od-land-eyebrow){font-size:13px;color:var(--muted);margin:14px 0 0}.od-land-final [data-land-final]{margin-top:28px}.od-land-footer{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:20px;padding:28px 0 36px;border-top:1px solid var(--line);font-size:11px;color:var(--muted)}.od-land-footer>nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap;justify-content:center}.od-land-footer a,.od-land-footer button{color:var(--muted);display:inline-flex;align-items:center;min-block-size:44px}.od-land-footer>nav a,.od-land-footer>nav button{padding:0 6px;font-size:11px}.od-land-footer>a:last-child{gap:10px;text-decoration:none}.od-land-footer>a:last-child svg{inline-size:16px;block-size:16px}.od-land-footer .od-land-brand b{font-size:21px;color:var(--text)}@media(min-width:1600px){.od-landing{max-inline-size:1360px;padding-inline:60px}.od-land-hero{padding-block:104px 88px;gap:90px}.od-landing h1{font-size:70px}.od-land-sub{font-size:18px}}@media(max-width:1099px){.od-land-hero{gap:36px;padding-block:65px}.od-landing h1{font-size:46px;letter-spacing:-1.8px}.od-land-sub{font-size:15px}.od-land-header nav{gap:18px}.od-land-trust{gap:16px;font-size:11px}.od-land-features{gap:18px}.od-land-features h3{font-size:13px}.od-landing h2{font-size:34px}.od-land-section-head>p{font-size:13px}}@media(max-width:768px){.od-landing{padding:0 22px}.od-land-header{block-size:78px;gap:12px}.od-land-brand{gap:6px}.od-land-brand b{font-size:22px}.od-land-brand>span{inline-size:28px}.od-land-brand svg{inline-size:26px;block-size:26px}.od-land-header nav{gap:14px}.od-land-header nav>a{font-size:12px}.od-land-header .od-land-nav-cta,.od-land-header .od-theme-btn,.od-land-open svg{display:none}.od-land-header .od-land-open{color:var(--text)}.od-land-hero{grid-template-columns:1fr;padding:43px 0 33px;gap:30px}.od-landing .od-land-eyebrow{font-size:9px;letter-spacing:.1em;margin-bottom:19px}.od-landing h1{font-size:43px;letter-spacing:-1.8px;line-height:1.09;margin-bottom:19px}.od-land-sub{font-size:15px;line-height:1.6;margin-bottom:25px}.od-land-actions{gap:12px}.od-land-actions .od-land-cta{inline-size:100%;justify-content:space-between}.od-land-actions>span{align-self:center;font-size:11px}.od-land-explore{margin-top:12px;font-size:11px}.od-land-demo{padding:0 3px 0 0}.od-land-demo-note{margin-top:19px;font-size:10px}.od-land-trust{display:grid;gap:15px;padding-block:22px;font-size:11px}.od-land-trust svg{inline-size:16px;block-size:16px}.od-land-section{padding-block:48px}.od-land-section-head{display:block;margin-bottom:25px}.od-landing h2{font-size:32px;letter-spacing:-.8px}.od-land-section-head>p{margin-top:18px;font-size:13px;line-height:1.6}.od-land-section-head>p br{display:none}.od-land-steps{grid-template-columns:1fr;gap:12px}.od-land-steps article{padding:22px}.od-land-step-top{margin-bottom:14px}.od-land-step-top>span{font-size:22px}.od-land-step-top svg{inline-size:27px;block-size:27px}.od-land-steps h3{font-size:16px}.od-land-steps p{max-inline-size:none;font-size:13px}.od-land-course-head{align-items:flex-start;gap:8px}.od-land-course-head>p{font-size:10px;text-align:right;max-inline-size:16ch}.od-land-course-head>p span{display:none}.od-land-course-head h3{font-size:17px}.od-roadmap-grid{grid-template-columns:1fr;gap:10px}.od-roadmap-card{padding:16px 18px}.od-roadmap-card h4{font-size:14px}.od-roadmap-card p{font-size:12px}.od-roadmap-meta{margin-bottom:10px}.od-land-course+.od-land-course{margin-top:27px}.od-land-features{grid-template-columns:repeat(2,minmax(0,1fr));gap:27px 20px}.od-land-features article>span{margin-bottom:14px}.od-land-features h3{font-size:14px}.od-land-features p{font-size:12px}.od-land-faq{grid-template-columns:1fr;gap:24px}.od-land-questions summary{font-size:13px;min-block-size:60px}.od-landing .od-pricing{padding-block:48px}.od-landing .od-plans{grid-template-columns:1fr;gap:16px}.od-landing .od-plan{padding:24px}.od-landing .od-plan-hero{padding-top:52px}.od-landing .od-price-lede{font-size:13px}.od-land-final{padding:40px 18px 46px;margin-bottom:40px;border-radius:18px}.od-land-final h2{font-size:33px}.od-land-final .od-land-eyebrow{font-size:9px}.od-land-final .od-land-cta{padding-inline:18px;gap:17px;font-size:14px;inline-size:100%}.od-land-footer{padding-block:22px;gap:5px 20px}.od-land-footer>nav{order:3;inline-size:100%;justify-content:flex-start;margin-top:7px}.od-land-footer>nav a,.od-land-footer>nav button{padding-inline:0 10px}.od-land-footer .od-land-brand{margin-inline-start:-2px}}@media(min-width:560px)and (max-width:768px){.od-land-hero{grid-template-columns:1fr 1fr;gap:25px}.od-landing h1{font-size:34px}.od-land-sub{font-size:13px}.od-land-actions .od-land-cta{font-size:12px;gap:8px;padding:0 12px}.od-roadmap-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.od-land-steps{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.od-land-steps article{padding:16px}.od-land-steps h3{font-size:14px}.od-land-steps p{font-size:12px}}@media(prefers-reduced-motion:reduce){.od-landing *{scroll-behavior:auto!important}.od-landing .od-land-cta,.od-roadmap-card{transition:none}.od-landing .od-land-cta:hover,.od-landing .od-land-cta:active,.od-roadmap-card:hover{transform:none}}.od-landing :is(h1,h2,h3,h4){text-wrap:balance}.od-landing p{text-wrap:pretty}.od-vh{position:absolute;inline-size:1px;block-size:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.od-land-header .od-theme-btn{display:inline-grid;place-items:center;min-inline-size:44px;min-block-size:44px;margin:0}.od-land-header nav{gap:18px}.od-roadmap-card{display:flex;flex-direction:column}.od-roadmap-card .od-roadmap-count{margin-top:auto;padding-top:10px;font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums;letter-spacing:.01em}.od-roadmap-card.is-free .od-roadmap-count{color:var(--accent);font-weight:600}.od-land-features .od-land-feat-n{font-size:13px;font-weight:650;color:var(--accent);margin:-4px 0 8px;font-variant-numeric:tabular-nums}.ld{--flow:#3f6fb0;position:relative;padding:20px 20px 18px;border:1px solid var(--line);border-radius:20px;background:var(--panel);box-shadow:0 1px #ffffff0d inset,0 24px 48px -32px #0004}.dark .ld{--flow:#8fb6ea}.ld-top{display:flex;align-items:center;justify-content:space-between;gap:12px}.od-landing .ld-eyebrow{margin:0;display:flex;align-items:center;gap:8px;font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--flow)}.ld-eyebrow>span{inline-size:7px;block-size:7px;border-radius:50%;background:var(--flow);box-shadow:0 0 0 4px color-mix(in srgb,var(--flow) 18%,transparent);animation:ld-pulse 2s ease-in-out infinite}.ld-count{margin:0;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}.ld-ask{margin:10px 0 4px;font-size:15px;line-height:1.45;font-weight:550;color:var(--text)}.ld-board{margin:6px -6px 0;border-radius:14px;background:var(--canvas);border:1px solid var(--line)}.ld-svg{display:block;inline-size:100%;block-size:auto;aspect-ratio:360/196;touch-action:none;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;cursor:default;overflow:visible}.ld.is-dragging .ld-svg{cursor:grabbing}.ld-atom{fill:var(--text);font:500 23px/1 Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Arial,sans-serif;text-anchor:middle;dominant-baseline:central}.ld-bond{fill:none;stroke:var(--text);stroke-width:1.9;stroke-linecap:round}.ld-lp{fill:var(--text)}.ld-charge{fill:none;stroke:var(--text);stroke-width:1.3;stroke-linecap:round}.ld-plus{fill:var(--muted);font:300 22px/1 Inter,Arial,sans-serif;text-anchor:middle;dominant-baseline:central}.ld-delta{fill:var(--muted);font:italic 12px/1 Georgia,serif}.ld-cap{fill:var(--muted);font:500 11px/1 Inter,Arial,sans-serif;letter-spacing:.06em;text-anchor:middle;text-transform:uppercase}.ld-hits{pointer-events:none}.ld-hits circle{fill:transparent;stroke:none}.ld-hit:focus{outline:none}.ld-hit:focus-visible circle,.ld-hit[aria-pressed=true] circle{stroke:var(--accent);stroke-width:2.5;stroke-dasharray:4 3}.ld-hit[data-kind=src]:focus-visible circle,.ld-hit[data-kind=src][aria-pressed=true] circle{stroke:var(--flow)}.ld-glow circle{fill:color-mix(in srgb,var(--flow) 16%,transparent);stroke:color-mix(in srgb,var(--flow) 55%,transparent);stroke-width:1.2;transform-box:fill-box;transform-origin:center;animation:ld-glow 1.8s ease-in-out infinite;pointer-events:none}.ld.has-lp .ld-glow-lp,.ld.has-bond .ld-glow-bond,.ld.is-product .ld-glow{display:none}.ld-hl circle{fill:color-mix(in srgb,var(--accent) 14%,transparent);stroke:var(--accent);stroke-width:1.5;pointer-events:none}.ld-live{fill:none;stroke:var(--flow);stroke-width:3;stroke-linecap:round;stroke-dasharray:6 5;opacity:.85;pointer-events:none}.ld-live-head{fill:var(--flow);opacity:.85;pointer-events:none}.ld-a-line{fill:none;stroke:var(--flow);stroke-width:3.4;stroke-linecap:round}.ld-a-head{fill:var(--flow);stroke:var(--flow);stroke-width:1;stroke-linejoin:round}.ld-arrow.is-new .ld-a-line{stroke-dasharray:1;stroke-dashoffset:1;animation:ld-draw .38s ease-out forwards}.ld-arrow.is-new .ld-a-head{opacity:0;animation:ld-fade .15s .3s ease-out forwards}.ld-nu,.ld-lg,.ld-cap,.ld-plus,.ld-new,.ld-old,.ld-lp-give,.ld-lp-new,.ld-o-charge,.ld-br-charge,.ld-delta,.ld-arrows{transition:transform .8s cubic-bezier(.4,0,.2,1),opacity .5s ease}.ld-new,.ld-lp-new,.ld-br-charge,.ld-cap-p,.ld-plus-p{opacity:0}.ld-scene{transition:transform .8s cubic-bezier(.4,0,.2,1)}.ld.is-product .ld-scene{transform:translate(-50px)}.ld.is-product .ld-nu{transform:translate(78px)}.ld.is-product .ld-lg{transform:translate(34px)}.ld.is-product :is(.ld-old,.ld-lp-give,.ld-o-charge,.ld-delta,.ld-plus-r,.ld-cap-r,.ld-arrows){opacity:0}.ld.is-product :is(.ld-new,.ld-lp-new,.ld-br-charge,.ld-plus-p,.ld-cap-p){opacity:1;transition-delay:.35s}.ld-msg{min-block-size:42px;margin:12px 0 0;font-size:14px;line-height:1.45;color:var(--muted)}.ld-msg[data-kind=ok]{color:var(--accent);font-weight:600}.ld-msg[data-kind=hint]{color:var(--text)}.ld-msg[data-kind=hint]:before{content:"Hint · ";font-weight:700;color:var(--flow)}.ld.is-wrong .ld-board{animation:ld-shake .32s ease}.ld-keys{margin:0;font-size:11.5px;line-height:1.5;color:var(--muted)}.ld-tr{display:flex;align-items:center;gap:4px;min-block-size:44px;margin-block:-8px}.ld-reset{display:inline-flex;align-items:center;gap:6px;min-block-size:44px;min-inline-size:44px;padding:0 10px;margin-inline-end:-8px;border-radius:10px;font-size:12px;font-weight:600;color:var(--accent)}.ld-reset:hover{background:var(--soft)}.ld.is-solved .ld-keys,.ld.is-solved .ld-msg{display:none}.ld-done{margin-top:12px;padding-top:16px;border-top:1px solid var(--line);animation:ld-rise .4s ease-out}.od-landing .ld-done-t{margin:0;font:400 26px/1.15 var(--serif,Georgia,serif);letter-spacing:-.6px;color:var(--text);outline:none}.ld-done-s{margin:6px 0 14px;font-size:14px;line-height:1.5;color:var(--muted)}.ld-done-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.ld-done-row .od-land-cta{gap:16px}.ld-again{min-block-size:44px;padding:0 16px;border-radius:12px;border:1px solid var(--line)!important;font-size:14px;font-weight:600;color:var(--text)}.ld-again:hover{background:var(--soft)}@keyframes ld-draw{to{stroke-dashoffset:0}}@keyframes ld-fade{to{opacity:1}}@keyframes ld-glow{0%,to{transform:scale(.85);opacity:.55}50%{transform:scale(1.15);opacity:1}}@keyframes ld-pulse{0%,to{opacity:1}50%{opacity:.45}}@keyframes ld-shake{0%,to{transform:none}25%{transform:translate(-5px)}75%{transform:translate(5px)}}@keyframes ld-rise{0%{opacity:0;transform:translateY(6px)}}@media(max-width:768px){.ld{padding:16px 14px 14px;border-radius:18px}.ld-board{margin-inline:-4px}.ld-ask{font-size:14px}.ld-done-row .od-land-cta{flex:1 1 100%;justify-content:space-between}.ld-again{flex:1 1 100%}.od-land-header .od-theme-btn{display:inline-grid;margin-inline:-6px}.od-roadmap-card p:not(.od-roadmap-count){display:none}.od-roadmap-card h4{margin:0}.od-roadmap-card .od-roadmap-count{padding-top:6px}}@media(prefers-reduced-motion:reduce){.ld *,.ld{animation:none!important;transition:none!important}.ld-arrow.is-new .ld-a-line{stroke-dashoffset:0}.ld-arrow.is-new .ld-a-head{opacity:1}}.ld-reset[hidden]{display:none}.od-landing .od-pricing{border-bottom:1px solid var(--line)}.od-land-final{margin-top:72px}.od-land-legal{display:flex;flex-wrap:wrap;align-items:center;column-gap:18px;font-size:12px;color:var(--muted)}.od-land-legal a{display:inline-flex;align-items:center;min-block-size:44px;color:var(--muted)}.od-land-legal span{min-block-size:44px;display:inline-flex;align-items:center}.od-land-course-head>p{max-inline-size:none!important;text-align:end}@media(min-width:1100px){.od-roadmap-grid{grid-template-columns:repeat(5,minmax(0,1fr))}.od-roadmap-card{padding:16px}}@media(max-width:768px){.od-land-final{margin-top:48px}.od-land-course-head{flex-direction:column;align-items:flex-start;gap:6px}.od-land-course-head>p{text-align:start!important;font-size:12px!important}.od-roadmap-grid{gap:8px}.od-roadmap-card{display:grid;grid-template-columns:44px 1fr auto;grid-template-areas:"n t a" "n c a";align-items:center;column-gap:10px;padding:12px 14px;border-radius:12px}.od-roadmap-meta{display:contents}.od-roadmap-glyph{display:none}.od-roadmap-n{grid-area:n;font-size:12px}.od-roadmap-access{grid-area:a;margin:0}.od-roadmap-card h4{grid-area:t;font-size:15px}.od-roadmap-card .od-roadmap-count{grid-area:c;padding-top:2px}.od-land-legal{column-gap:16px}.od-land-legal span{inline-size:100%;min-block-size:0;padding-block:6px}}.od-landing .od-land-nav-cta{min-block-size:44px}.od-landing .od-school-code a,.od-land-questions details a{display:inline-flex;align-items:center;min-block-size:44px}.od-land-sub-short{display:none}.od-landing .od-land-offer{margin:-2px 0 0;font-size:13px;line-height:1.5;color:var(--muted);max-inline-size:46ch}.od-land-offer b{color:var(--text);font-weight:650}.od-landing .od-land-cta-2{min-block-size:48px;padding:0 18px;gap:18px;font-size:14px;background:transparent;color:var(--accent);border:1.5px solid color-mix(in srgb,var(--accent) 55%,var(--line));box-shadow:none}.dark .od-landing .od-land-cta-2{color:var(--accent)}.od-landing .od-land-cta-2:hover{background:var(--accent-soft);filter:none;box-shadow:none}.od-land-cta-2 svg{inline-size:18px;block-size:18px}.od-roadmap-week{white-space:nowrap;font-weight:600;color:var(--accent)}.od-land-sticky{display:none}.ld-ghost{pointer-events:none}.ld-ghost-line{fill:none;stroke:var(--flow);stroke-width:3;stroke-linecap:round;stroke-dasharray:1;stroke-dashoffset:1;opacity:0;animation:ld-ghost 2.8s ease-in-out .6s infinite}.ld-ghost-head{fill:var(--flow);opacity:0;animation:ld-ghost-head 2.8s ease-in-out .6s infinite}.ld.is-touched .ld-ghost,.ld.has-lp .ld-ghost,.ld.is-product .ld-ghost{display:none}@keyframes ld-ghost{0%{stroke-dashoffset:1;opacity:0}8%{opacity:.6}50%{stroke-dashoffset:0;opacity:.6}80%,to{stroke-dashoffset:0;opacity:0}}@keyframes ld-ghost-head{0%,42%{opacity:0}52%{opacity:.6}80%,to{opacity:0}}@keyframes od-land-up{0%{transform:translateY(100%)}}@media(max-width:768px){.od-land-header{block-size:64px}.od-land-hero{padding:16px 0 28px;gap:18px}.od-land-hero .od-land-eyebrow,.od-land-explore,.od-land-sub-long{display:none}.od-landing h1{font-size:34px;letter-spacing:-1.2px;line-height:1.08;margin-bottom:10px}.od-land-sub-short{display:block;font-size:15px;line-height:1.45;margin-bottom:16px}.od-land-actions{gap:10px}.od-land-actions .od-land-cta-2{inline-size:100%;justify-content:space-between}.od-landing .od-land-offer{align-self:stretch;font-size:12px}.od-land-sticky{display:block;position:fixed;inset-inline:0;bottom:0;z-index:40;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:color-mix(in srgb,var(--bg) 94%,transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-top:1px solid var(--line);animation:od-land-up .22s ease-out}.od-land-sticky[hidden]{display:none}.od-land-sticky .od-land-cta{inline-size:100%;justify-content:space-between;min-block-size:52px}}@media(prefers-reduced-motion:reduce){.od-land-sticky{animation:none}.ld .ld-ghost-line{stroke-dashoffset:0;opacity:.4}.ld .ld-ghost-head{opacity:.4}}.od-landing.is-funnel .od-land-nav-cta{display:none}.od-landing .od-land-first-problem{min-block-size:60px;font-size:17px;padding-inline:28px}@media(max-width:768px){.od-land-actions .od-land-first-problem{inline-size:100%;justify-content:space-between}}.ld-table{fill:none;stroke:var(--muted);stroke-width:2.2;stroke-linecap:round}.ld-book rect{fill:var(--panel);stroke:var(--text);stroke-width:1.9}.ld-dir{fill:var(--line);stroke:var(--muted);stroke-width:1;opacity:.9}.ld-chip rect{fill:var(--panel);stroke:var(--line);stroke-width:1.4}.ld-chip text{fill:var(--text);font:600 12px/1 Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Arial,sans-serif;text-anchor:middle;dominant-baseline:central}.ld .ld-atom{font-size:15px;font-weight:600}.ld-a-label{fill:var(--flow);font:italic 600 14px/1 Georgia,serif;text-anchor:middle;dominant-baseline:central}.ld.has-lp .ld-glow-gravity,.ld.has-bond .ld-glow-normal{display:none}.ld.is-product .ld-scene{transform:none}.ld.is-product .ld-chips{opacity:0}.ld.is-product .ld-arrows{opacity:1}.ld .ld-dirs{transition:opacity .5s ease}.ld.is-product .ld-dirs{opacity:0}.ld .ld-cap-p{text-transform:none;letter-spacing:.01em;font-size:13px;font-weight:600;dominant-baseline:central}.ld.is-product .ld-book rect{fill:var(--accent-soft);transition:fill .5s}.ld .ld-cap-r{display:none}