:root{--bg:#101312;--panel:#191d1b;--panel-hi:#202622;--border:#343b35;--ink:#eeeede;--muted:#a5afa4;--lime:#d6e8a4;--cream:#f1eedf;--blue:#bccfe8;--bad:#ffb5a6;--radius:14px;color-scheme:dark;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-synthesis:none}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-size:14px;line-height:1.55}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}a{color:inherit}button{color:inherit}button:disabled{opacity:.38;cursor:not-allowed}[hidden]{display:none!important}:focus-visible{outline:3px solid var(--blue);outline-offset:4px}button:focus-visible,input:focus-visible{outline-offset:3px}.skip-link{position:fixed;top:-60px;left:20px;z-index:100;background:var(--cream);color:var(--bg);padding:12px 20px;border-radius:8px}.skip-link:focus{top:12px}.app-shell{display:grid;grid-template-columns:258px minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;height:100dvh;overflow:auto;border-right:1px solid var(--border);padding:34px 23px 22px;background:#151a16;display:flex;flex-direction:column}.brand{display:flex;gap:12px;align-items:center;text-decoration:none;font-size:23px;font-weight:550;letter-spacing:-1px}.brand-mark{font-family:Georgia,serif;font-size:38px;line-height:1;display:inline-flex;gap:0;color:var(--lime)}.brand-mark>span{font-family:inherit;transform:translate(-3px,8px)}.brand-day{font-size:17px;color:var(--muted);font-weight:400;margin-left:5px;letter-spacing:-.4px}.course-label{font-size:9px;letter-spacing:1.4px;font-weight:600;color:var(--muted);margin-top:45px}.sidebar-title{font-family:Georgia,"Times New Roman",serif;font-size:25px;line-height:1.24;letter-spacing:-.7px;margin:11px 0 15px;color:var(--cream)}.course-meta{display:flex;gap:13px;font-size:10px;color:var(--muted)}.course-meta span+span{border-left:1px solid var(--border);padding-left:13px}.sidebar-progress{margin:24px 0 27px;font-size:10px}.sidebar-progress>div:first-child{display:flex;justify-content:space-between;color:var(--muted);margin-bottom:9px}.progress-track{height:4px;background:#323a30;border-radius:6px;overflow:hidden}#progress-fill{height:100%;background:var(--lime);width:0;transition:width .3s ease}.nav-lesson{border:1px solid transparent;width:100%;border-radius:9px;display:grid;grid-template-columns:28px 1fr 13px;gap:10px;text-align:left;background:none;padding:13px 10px;margin:2px 0;color:var(--muted)}.nav-lesson:hover{background:#222923;color:var(--cream)}.nav-lesson[aria-current=step]{background:#d7e6ad;color:#18201a;border-color:#e4f0c2}.nav-number{height:27px;width:27px;border:1px solid #4a5349;border-radius:50%;display:grid;place-items:center;font-size:10px;line-height:1}.nav-lesson[aria-current=step] .nav-number{border-color:#748663}.nav-text{font-size:12px;font-weight:550;line-height:1.4;align-self:center}.nav-text small{font-size:9px;display:block;opacity:.65;margin-top:2px;font-weight:400}.nav-check{font-size:12px;align-self:center}.sidebar-bottom{margin-top:auto;padding-top:38px}.local-indicator{font-size:10px;display:flex;align-items:center;gap:7px;color:#c7d1bd}.local-indicator span{width:5px;height:5px;border-radius:50%;background:var(--lime)}.sidebar-bottom p{font-size:10px;line-height:1.7;color:var(--muted);margin:9px 0 10px}.text-button{border:0;background:transparent;padding:5px 0;text-align:left;font-size:11px;color:var(--muted)}.text-button:hover{color:var(--ink)}.sidebar-bottom .text-button{text-decoration:underline;text-underline-offset:3px}.workspace{min-width:0}.topbar{height:79px;padding:0 42px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:15px}.workspace-name{display:flex;align-items:center;gap:10px;font-size:9px;letter-spacing:1.45px;color:var(--muted)}.tiny-orbit{font-size:24px;color:var(--lime)}.top-actions{display:flex;gap:19px}.top-button{font-size:11px;background:none;border:0;display:flex;gap:20px;align-items:center;padding:9px 0;color:#d8dccf}.top-button:hover{color:var(--lime)}.export-button{border:1px solid var(--border);padding:8px 13px;border-radius:6px}main{max-width:1480px;margin:0 auto;padding:39px 42px 20px}.lesson-heading{display:flex;gap:20px;align-items:center;justify-content:space-between;margin-bottom:30px}.eyebrow{font-size:9px;letter-spacing:1.6px;font-weight:550;color:var(--lime);text-transform:uppercase}h1{font-family:Georgia,"Times New Roman",serif;font-weight:400;font-size:clamp(34px,3.4vw,51px);line-height:1.13;letter-spacing:-1.6px;margin:11px 0 12px}.lesson-heading p{color:var(--muted);font-size:12px;max-width:610px;margin:0}.lesson-time{border:1px solid var(--border);padding:10px 16px;border-radius:9px;text-align:center;flex-shrink:0}.lesson-time span{display:block;font-size:9px;color:var(--muted)}.lesson-time span:first-child{font-size:15px;color:var(--cream);margin-bottom:1px}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 248px;gap:28px}.lesson-primary{min-width:0}.section-line{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:13px}.section-line h2{margin:0;font-size:13px;font-weight:550;display:flex;align-items:center;gap:9px}.step-label{font-family:monospace;font-size:10px;color:var(--muted);font-weight:400}.pill{font-size:8px;letter-spacing:1px;padding:4px 7px;border:1px solid #3e4b39;border-radius:4px;color:var(--lime);white-space:nowrap}.video-stage{aspect-ratio:16/9;position:relative;overflow:hidden;border:1px solid #525e57;border-radius:var(--radius);background:#262f35}.video-stage iframe{position:absolute;inset:0;border:0;width:100%;height:100%;background:#000}.poster-art{position:absolute;width:100%;height:100%;inset:0}.video-thumbnail{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.58;filter:saturate(.7)}.poster-overlay{position:absolute;inset:0;background:linear-gradient(0deg,rgba(10,20,21,.92),rgba(10,20,21,.12) 70%);display:flex;align-items:flex-end;padding:28px}.poster-copy{max-width:76%;position:relative}.poster-kicker{font-size:8px;letter-spacing:1.8px;color:#c8d4b9;margin-bottom:8px}.poster-copy h3{font-family:Georgia,serif;font-size:clamp(24px,2.7vw,38px);font-weight:400;letter-spacing:-.8px;line-height:1.1;margin:0 0 8px;color:#f5f1e5}.poster-copy p{font-size:11px;line-height:1.5;color:#b9c8c6;margin:0;max-width:380px}.play-button{position:absolute;right:27px;bottom:31px;display:grid;place-items:center;border:1px solid #eff2de;width:58px;height:58px;border-radius:50%;background:#e4edc9;color:#14221c;font-size:21px;box-shadow:0 0 0 7px #d6e8a419}.play-button:hover{background:white}.video-placeholder-label{position:absolute;top:19px;left:22px;display:flex;align-items:center;gap:8px;font-size:8px;letter-spacing:1.6px;color:#d3dfd4}.video-placeholder-label{z-index:1;background:#11251abf;border:1px solid #9aaf7b66;border-radius:4px;padding:5px 7px;backdrop-filter:blur(4px)}.video-placeholder-label .dot{width:5px;height:5px;background:var(--lime);border-radius:50%}.video-details{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:15px 0 12px}.video-details h3{font-size:13px;font-weight:550;line-height:1.5;margin:0 0 4px}.video-details p{font-size:10px;color:var(--muted);margin:0}#video-source-note{font-size:9px;line-height:1.7;color:#91a18a;margin-top:8px;max-width:630px}.video-list{display:flex;gap:9px;overflow:auto;padding:0 0 6px}.video-choice{flex:1;min-width:150px;background:var(--panel);border:1px solid var(--border);border-radius:7px;text-align:left;padding:10px;font-size:11px;color:var(--muted)}.video-choice[aria-pressed=true]{border-color:#b5c68c;color:var(--cream)}.video-choice small{display:block;font-size:9px;margin-top:4px;opacity:.7}.video-choice:hover{background:var(--panel-hi)}.button{border:1px solid var(--border);background:var(--panel-hi);padding:10px 14px;border-radius:7px;text-decoration:none;font-size:11px;display:inline-flex;align-items:center;justify-content:center;gap:16px;font-weight:550;line-height:1.4}.button:hover{background:#303a32;border-color:#879079}.button-small{font-size:9px;padding:8px 10px;white-space:nowrap}.button-primary{background:var(--lime);color:#182019;border-color:var(--lime)}.button-primary:hover{background:#e6f4bd;border-color:#e6f4bd}.button-danger{background:#4d2d26;border-color:#98685c;color:#ffded0}.watch-assignment{display:flex;gap:11px;padding:11px 0;border-top:1px solid var(--border);font-size:11px;color:#c5cfc0}.watch-assignment p{margin:0}.note-icon{color:var(--lime);font-size:18px}.check-row{display:flex;gap:9px;align-items:flex-start;font-size:11px;color:#c6cebe;cursor:pointer;margin:13px 0 6px}.check-row input{width:15px;height:15px;flex-shrink:0;margin:2px 0 0;accent-color:var(--lime)}.honesty-note{color:var(--muted);font-size:9px;margin:4px 0 0 24px}.experiment-section,.quiz-section,.evidence-section{margin-top:37px;border-top:1px solid var(--border);padding-top:24px}.experiment-card{border:1px solid var(--border);background:var(--panel);border-radius:var(--radius);padding:20px;overflow:hidden}.experiment-head{display:flex;gap:10px;align-items:flex-start;justify-content:space-between;margin-bottom:12px}.experiment-head h3{margin:0;font-size:14px;font-weight:550;letter-spacing:-.2px}.experiment-head p{margin:4px 0 0;color:var(--muted);font-size:10px}.experiment-badge{font-size:8px;color:var(--lime);border:1px solid var(--border);border-radius:4px;white-space:nowrap;padding:3px 5px}.lab-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:center}.experiment-visual{min-width:0}.experiment-visual svg{width:100%;height:auto;display:block}.control-group{margin:12px 0}.control-group label,.control-label{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:11px;color:#d6decc;margin-bottom:6px}.control-group output{font-family:monospace;color:var(--lime);font-size:12px}input[type=range]{width:100%;accent-color:var(--lime);cursor:pointer;height:25px}.range-ends{display:flex;justify-content:space-between;color:var(--muted);font-size:9px}select{width:100%;border:1px solid #4d594d;background:#101813;border-radius:6px;padding:9px 10px;color:var(--ink);font-size:11px}.prob-row{margin:12px 0}.prob-label{display:flex;align-items:center;justify-content:space-between;font-size:11px;margin-bottom:5px}.prob-label strong{font-weight:500;font-family:monospace;color:var(--lime)}.prob-track{height:7px;border-radius:5px;background:#303830;overflow:hidden}.prob-fill{height:100%;background:var(--lime);border-radius:5px;transition:width .12s}.prob-row.blue .prob-fill{background:var(--blue)}.prob-row.blue strong{color:var(--blue)}.formula{font-family:monospace;font-size:11px;background:#111813;border:1px solid #34422f;padding:11px 12px;border-radius:7px;margin-top:13px;color:#d4dfcb;line-height:1.65}.lab-explanation{font-size:10px;color:var(--muted);margin:12px 0 0}.caveat{color:var(--muted);font-size:10px;line-height:1.7;margin:12px 0}.caveat::before{content:'MODEL LIMIT / ';font-size:8px;letter-spacing:.7px;color:#d2d9c7}.rail-card{border:1px solid var(--border);border-radius:11px;padding:20px;margin-bottom:18px;background:var(--panel)}.rail-card h2{font-size:12px;font-weight:550;margin:0 0 10px}.rail-card p{font-size:11px;color:var(--muted);line-height:1.8;margin:0}.takeaway-card{background:var(--cream);border:0;color:#253025;padding:23px 20px}.takeaway-card .eyebrow{color:#64765a;font-size:8px;letter-spacing:1.2px}.takeaway-card h2{font-family:Georgia,serif;font-size:23px;letter-spacing:-.6px;font-weight:400;line-height:1.2;margin:14px 0 13px}.takeaway-card p{color:#52604d;font-size:11px;line-height:1.7}.rail-divider{height:1px;background:#d3d4bd;margin:19px 0 17px}.takeaway-card .rail-divider+.eyebrow{margin-bottom:10px}.rail-card dl{margin:0}.rail-card dt{font-size:11px;font-weight:550;color:#d5dfc7;margin:14px 0 5px}.rail-card dd{margin:0;font-size:10px;color:var(--muted);line-height:1.75}.source-card .section-line{margin-bottom:10px}.source-card .section-line h2{margin:0}.source-link{display:block;text-decoration:none;padding:13px 0;border-top:1px solid var(--border);margin-top:13px;color:var(--cream);font-size:11px}.source-link+ .source-link{margin-top:0}.source-link span{display:flex;justify-content:space-between;gap:8px}.source-link small{display:block;color:var(--muted);font-size:9px;line-height:1.6;margin-top:4px}.source-link:hover{color:var(--lime)}.boundary-card{background:none;border-style:dashed}.boundary-card h2{display:inline;font-size:11px}.boundary-card p{margin-top:9px;font-size:10px}.boundary-dot{display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--lime);margin-right:7px}.quiz-card{border:1px solid var(--border);border-radius:10px;padding:18px;margin-bottom:13px;background:var(--panel)}.quiz-card legend{font-size:12px;font-weight:550;padding:0}.quiz-card fieldset{border:0;padding:0;margin:0;min-width:0}.quiz-options{display:grid;gap:8px;margin-top:15px}.quiz-option{display:flex;gap:10px;align-items:flex-start;padding:10px 11px;border-radius:6px;background:#232a24;border:1px solid #3b453a;font-size:11px;color:#c9d0c2;cursor:pointer}.quiz-option input{accent-color:var(--lime);margin:2px 0 0;flex-shrink:0}.quiz-option:hover{border-color:#7b896d}.quiz-option:has(input:checked){border-color:#b7cb8b;color:var(--cream)}.quiz-feedback{margin-top:12px;font-size:11px;color:var(--lime);border-top:1px solid #414d39;padding-top:12px}.quiz-feedback.wrong{color:var(--bad);border-color:#655047}.quiz-feedback strong{display:block;margin-bottom:5px;font-weight:550}.muted{color:var(--muted);font-size:10px}.evidence-section{background:var(--cream);color:#253025;border:0;border-radius:var(--radius);padding:22px}.evidence-section .section-line h2{font-size:13px}.evidence-section .step-label{color:#73816b}.evidence-section p{font-size:11px;color:#53614d;line-height:1.75;margin:14px 0}.light-pill{border-color:#c3cbae;color:#5f7250}.field-label{display:block;font-size:10px;color:#56644d;font-weight:550;margin:18px 0 7px}textarea{width:100%;background:#faf9f0;color:#253025;border:1px solid #cdd2be;border-radius:8px;resize:vertical;padding:13px;font-size:12px;line-height:1.75;min-height:140px;color-scheme:light}textarea::placeholder{color:#90977c}.save-line{display:flex;justify-content:space-between;font-size:9px;color:#768369;margin-top:6px;gap:10px}.evidence-section .check-row{color:#53614d;font-size:11px;margin:18px 0}.evidence-section .check-row input{accent-color:#4f6e3d}.complete-row{display:flex;gap:14px;align-items:center;flex-wrap:wrap}.evidence-section .button-primary{background:#283a29;color:#edf0db;border-color:#283a29}.evidence-section .button-primary:hover{background:#40533a}.evidence-section .complete-row p{font-size:10px;margin:0;max-width:230px}.requirements{display:flex;gap:5px 12px;flex-wrap:wrap;margin-top:14px}.requirement{font-size:9px;color:#7b6658}.requirement.done{color:#536d3d}.lesson-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:29px 0 17px}.lesson-footer>span{color:var(--muted);font-size:10px}.app-footer{max-width:1480px;margin:0 auto;padding:17px 42px 25px;border-top:1px solid var(--border);display:flex;justify-content:space-between;gap:15px;color:#798574;font-size:9px}.notice{padding:13px 42px;background:#453826;color:#f7dfb5;font-size:12px}.notice a{color:inherit}.memory-bars{display:grid;gap:10px;margin:18px 0}.memory-row{display:flex;align-items:center;justify-content:space-between;padding:9px 12px;background:#232b24;border-radius:6px;font-size:11px}.memory-row strong{color:var(--lime);font-family:monospace;font-weight:400}details>summary{cursor:pointer;padding:10px 0}details>summary:hover{color:var(--lime)}.code-panel{background:#0e1511;border:1px solid #374534;border-radius:8px;padding:15px;white-space:pre;overflow:auto;font-family:monospace;font-size:10px;line-height:1.7;color:#cfe0bf;max-height:280px}.code-actions{display:flex;gap:10px;flex-wrap:wrap;margin:12px 0}.code-status{font-size:10px;color:var(--muted)}.bits-row{display:flex;gap:12px;justify-content:center;margin:22px 0}.bit-button{width:58px;height:66px;border-radius:9px;background:#263826;border:1px solid #758d5d;color:var(--lime);font:30px Georgia,serif;display:flex;align-items:center;justify-content:center;flex-direction:column}.bit-button small{font:9px system-ui;color:var(--muted);margin-top:3px}.bit-button.flipped{background:#452e23;color:#f2c49f;border-color:#9b6c4f}.bit-button:hover{border-color:var(--cream)}.syndrome-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:17px 0}.syndrome-item{text-align:center;padding:11px;background:#121a14;border:1px solid #354230;border-radius:7px;font-size:9px;color:var(--muted)}.syndrome-item strong{display:block;font-family:monospace;font-weight:400;font-size:20px;color:var(--lime);margin-top:6px}.mini-table{width:100%;border-collapse:collapse;font-size:10px;text-align:left;margin-top:14px}.mini-table th,.mini-table td{padding:8px;border-bottom:1px solid var(--border)}.mini-table th{color:var(--muted);font-weight:400}.mini-table tr.active{background:#2d3b26;color:var(--lime)}.fit-result{font-family:monospace;font-size:11px;padding:12px;border:1px solid #4d6239;border-radius:7px;color:var(--lime);margin-top:10px}.fit-result.invalid{color:var(--bad);border-color:#6e5144}.latency-controls{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}.budget-total{display:flex;justify-content:space-between;align-items:center;font-size:11px;border-top:1px solid var(--border);padding-top:13px;margin-top:12px}.budget-total strong{font-family:monospace;font-size:23px;font-weight:400;color:var(--lime)}.budget-total.late strong{color:var(--bad)}.memo-label{display:block;margin:15px 0 8px;font-size:11px;color:var(--muted)}#product-memo{background:#101813;border-color:#4b5c3d;color:var(--cream);color-scheme:dark;min-height:350px;font-size:12px}#product-memo::placeholder{color:#6b7962}.pilot-path{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:12px 0}.pilot-path>div{border:1px solid #4b593f;border-radius:8px;padding:13px;background:#222c22;font-size:10px;color:var(--muted)}.pilot-path strong{display:block;font-size:12px;color:var(--lime);margin-bottom:6px}.pilot-path .stage-num{font-family:monospace;font-size:9px;color:#9aaa81;margin-bottom:8px;display:block}dialog{color:var(--ink);background:#1c241d;border:1px solid #647157;border-radius:16px;max-width:min(560px,calc(100vw - 32px));padding:28px;box-shadow:0 20px 100px #0008;max-height:90vh;overflow:auto}dialog::backdrop{background:#050b07bb;backdrop-filter:blur(5px)}.wide-dialog{width:800px;max-width:calc(100vw - 32px)}.dialog-top{display:flex;align-items:flex-start;justify-content:space-between;gap:20px}.dialog-top h2{font-family:Georgia,serif;font-size:27px;font-weight:400;line-height:1.2;letter-spacing:-.5px;margin:6px 0 15px}.icon-button{background:none;border:1px solid var(--border);border-radius:50%;width:29px;height:29px;font-size:19px;display:grid;place-items:center;color:var(--muted);flex-shrink:0}dialog>p{font-size:12px;color:var(--muted)}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:24px}.agenda-row{display:grid;grid-template-columns:100px 1fr 60px;gap:15px;align-items:center;border-top:1px solid var(--border);padding:15px 0}.agenda-row time{font-family:monospace;font-size:11px;color:var(--lime)}.agenda-row button{border:0;background:none;text-align:left;padding:0;font-size:13px;color:var(--cream)}.agenda-row button:hover{text-decoration:underline}.agenda-row p{font-size:10px;color:var(--muted);line-height:1.65;margin:5px 0 0}.agenda-row>span{font-size:10px;color:var(--muted);text-align:right}.agenda-break{font-size:11px;color:#b1c78d;border-top:1px solid var(--border);padding:10px;background:#273423;border-radius:6px}.agenda-total{font-size:12px;color:var(--lime);border-top:1px solid var(--border);padding-top:18px}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--cream);color:#273525;padding:11px 20px;border-radius:8px;font-size:12px;box-shadow:0 5px 30px #0008;z-index:200;max-width:calc(100vw - 30px);display:none}#toast.visible{display:block}
@media(min-width:1600px){.sidebar{padding-left:28px;padding-right:28px}.app-shell{grid-template-columns:280px minmax(0,1fr)}.lesson-layout{grid-template-columns:minmax(0,1fr) 275px;gap:35px}.lesson-heading{margin-bottom:36px}.video-details h3{font-size:15px}.video-details p{font-size:11px}.rail-card{padding:23px}.rail-card p{font-size:12px}}
@media(max-width:1180px){.app-shell{grid-template-columns:224px minmax(0,1fr)}.sidebar{padding:28px 16px 20px}.brand{font-size:21px}.sidebar-title{font-size:23px}.topbar{padding:0 28px}.lesson-layout{grid-template-columns:minmax(0,1fr) 215px;gap:20px}main{padding:32px 28px 15px}.app-footer{padding-left:28px;padding-right:28px}.rail-card{padding:16px}.poster-overlay{padding:22px}.poster-copy{max-width:75%}.play-button{width:48px;height:48px;right:21px;bottom:26px}.video-details{align-items:flex-start;flex-direction:column}.lesson-heading p{max-width:450px}.lab-grid{gap:12px}.experiment-card{padding:16px}.nav-text{font-size:11px}.nav-lesson{gap:7px;padding:12px 7px}.takeaway-card h2{font-size:22px}}
@media(max-width:1000px){.lesson-layout{grid-template-columns:1fr}.lesson-rail{display:grid;grid-template-columns:1fr 1fr;gap:16px}.rail-card{margin-bottom:0}.lesson-rail .boundary-card{align-self:start}.poster-copy h3{font-size:38px}.poster-copy p{font-size:12px}.video-details{flex-direction:row}.lesson-time{padding:8px 12px}.top-actions{gap:12px}.top-button{gap:10px}.lesson-heading{align-items:flex-start}.app-footer{flex-direction:column;gap:4px}.lab-grid{gap:22px}.lesson-rail{margin-top:25px}}
@media(max-width:720px){.app-shell{display:block}.sidebar{position:relative;height:auto;display:block;padding:20px 20px 16px;border-right:0;border-bottom:1px solid var(--border);overflow:visible}.brand{font-size:23px}.brand-mark{font-size:34px}.course-label,.sidebar-title,.course-meta,.sidebar-bottom{display:none}.sidebar-progress{position:absolute;top:21px;right:20px;min-width:120px;margin:0;max-width:38%;font-size:9px}.sidebar-progress>div:first-child{gap:12px}.sidebar-progress #progress-percent{display:none}#lesson-nav{display:flex;overflow:auto;gap:7px;margin-top:20px;padding-bottom:3px;scrollbar-width:thin}.nav-lesson{flex-shrink:0;width:auto;min-width:145px;grid-template-columns:24px 1fr 10px;padding:10px 9px;margin:0;background:#202820;border-color:var(--border)}.nav-number{width:24px;height:24px}.nav-text{font-size:10px}.nav-text small{font-size:8px}.topbar{height:58px;padding:0 20px}.workspace-name{font-size:8px;letter-spacing:.8px;gap:6px}.tiny-orbit{font-size:20px}.top-button{font-size:10px;gap:8px}.export-button{padding:7px 9px}main{padding:26px 20px 15px}.lesson-heading{margin-bottom:23px;gap:12px}h1{font-size:36px;letter-spacing:-1.1px}.lesson-heading p{font-size:11px}.eyebrow{font-size:8px;letter-spacing:1.2px}.lesson-time{padding:8px 9px;margin-top:24px}.lesson-time span:first-child{font-size:12px}.lesson-time span:last-child{font-size:8px}.poster-copy h3{font-size:31px}.poster-copy p{font-size:10px}.poster-overlay{padding:20px}.poster-copy{max-width:78%}.play-button{right:20px;bottom:23px;width:42px;height:42px;font-size:17px;box-shadow:0 0 0 5px #d6e8a419}.video-placeholder-label{font-size:7px;top:15px;left:18px}.video-details h3{font-size:12px}.video-details{gap:10px}.button-small{font-size:8px;padding:8px;gap:7px}.lesson-rail{gap:13px}.rail-card{padding:16px}.takeaway-card h2{font-size:24px}.app-footer{padding:17px 20px 25px}.notice{padding:12px 20px}.lab-grid{gap:18px}.agenda-row{grid-template-columns:88px 1fr 42px;gap:10px}.agenda-row time{font-size:9px}dialog{padding:22px}.dialog-top h2{font-size:25px}}
@media(max-width:430px){.workspace-name{letter-spacing:.2px;font-size:7px}.top-actions{gap:10px}.topbar{padding:0 16px}.tiny-orbit{display:none}main{padding:23px 16px 12px}h1{font-size:31px}.lesson-time{margin-top:21px;min-width:55px}.lesson-heading p{font-size:10px}.poster-copy h3{font-size:26px}.poster-copy p{font-size:9px;max-width:245px}.poster-copy{max-width:82%}.poster-overlay{padding:16px}.play-button{right:15px;bottom:19px;width:36px;height:36px;font-size:15px}.video-stage{aspect-ratio:16/10}.video-details{flex-direction:column}.lesson-rail{grid-template-columns:1fr}.rail-card dl{display:grid;grid-template-columns:1fr;gap:0}.lab-grid{grid-template-columns:1fr}.lab-grid .experiment-visual{max-width:230px;margin:auto}.latency-controls{gap:0 12px}.pilot-path{grid-template-columns:1fr}.experiment-head{flex-direction:column}.evidence-section{padding:18px}.complete-row .button{width:100%}.lesson-footer .button{gap:8px;padding:9px;font-size:10px}.lesson-footer .text-button{font-size:10px}.requirements{display:grid;gap:5px}.agenda-row{grid-template-columns:76px 1fr}.agenda-row>span{display:none}.dialog-actions{flex-direction:column}.save-line{font-size:8px}.app-footer{padding-left:16px;padding-right:16px}.sidebar-progress{min-width:105px}.video-details .button-small{align-self:flex-start}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

.lesson-opening{margin:0 0 26px;font-size:13px;line-height:1.75;color:var(--ink)}.lesson-opening p{margin:0 0 14px;overflow-wrap:anywhere}.worked-example{border:1px solid var(--border);border-left:3px solid var(--lime);border-radius:8px;background:var(--panel);padding:14px 16px;margin:16px 0}.worked-example h2{font-size:12px;margin:0 0 8px;color:var(--lime)}.worked-example p{margin:0;font-size:12px}.lesson-opening .role-context{font-size:12px;color:var(--muted)}