@charset "UTF-8";
:root{--bg:#f6f5f0;--paper:#fffefa;--ink:#1b3634;--muted:#6a7771;--line:#dce1d7;--accent:#235c4b;--lime:#d4edab;--wash:#eaf0e5;--code:#183331;--code-ink:#e0eddf;--orange:#b96d3f;--shadow:0 16px 50px #143c3a0d;color-scheme:light;font-family:Inter,"Segoe UI",Arial,sans-serif;font-synthesis:none}
:root[data-theme=dark]{--bg:#142321;--paper:#1c2e2a;--ink:#e5eddb;--muted:#a7b5aa;--line:#34463f;--accent:#bcdda5;--lime:#c5e5a1;--wash:#293d31;--code:#0b1918;--code-ink:#deead7;color-scheme:dark}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.6}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #94b957;outline-offset:4px}button{color:inherit}button,select,input,textarea{border:1px solid var(--line);background:var(--paper);border-radius:7px}h1,h2,h3,p{margin-top:0}h1,h2,h3{font-weight:600;letter-spacing:-.045em;line-height:1.12}h1{font-size:clamp(36px,4.1vw,65px)}h2{font-size:clamp(25px,2.7vw,36px)}h3{font-size:20px}p{margin-bottom:1.2em}code,kbd,pre,.mono{font-family:"Cascadia Code",Consolas,"Liberation Mono",monospace}code{font-size:.87em;background:var(--wash);padding:.13em .33em;border-radius:4px;overflow-wrap:anywhere}pre code{background:none;padding:0;overflow-wrap:normal;font-size:13px;line-height:1.7}pre{margin:0;overflow:auto;tab-size:4}hr{border:0;border-top:1px solid var(--line);margin:30px 0}.sr-only{position:absolute;clip:rect(0,0,0,0);width:1px;height:1px;overflow:hidden}.skip{position:fixed;top:-100px;left:20px;padding:12px;background:var(--lime);z-index:100}.skip:focus{top:10px}
.sidebar{width:256px;position:fixed;inset:0 auto 0 0;padding:32px 22px 22px;border-right:1px solid var(--line);background:var(--paper);display:flex;flex-direction:column;z-index:30;overflow:auto}.brand{display:flex;gap:11px;align-items:center;font-size:23px;letter-spacing:-1px;font-weight:650;line-height:1}.brand:hover{text-decoration:none}.brand-icon{font-size:46px;line-height:40px;color:var(--accent);letter-spacing:-8px;margin-right:4px}.brand-light{font-weight:350}.brand-sub{display:block;letter-spacing:1.8px;font-size:8px;margin-top:10px}.search-launch{display:flex;justify-content:space-between;align-items:center;width:100%;padding:10px 12px;background:var(--bg);margin:33px 0 30px;font-size:12px;color:var(--muted)}kbd{border:1px solid var(--line);border-radius:3px;padding:0 5px;font-size:10px}.nav-caption,.eyebrow{font-size:10px;letter-spacing:1.8px;font-weight:700;color:var(--muted)}.nav-caption{margin:0 12px 12px}.nav-item{display:flex;align-items:center;gap:11px;font-size:12px;border-radius:7px;margin:4px 0;padding:11px 12px;color:var(--muted)}.nav-item:hover{background:var(--wash);text-decoration:none;color:var(--ink)}.nav-item.active{background:var(--wash);color:var(--ink);font-weight:650}.nav-number{font:10px Consolas,monospace;opacity:.8;min-width:18px}.nav-complete{margin-left:auto;color:var(--accent)}.nav-separator{height:1px;background:var(--line);margin:17px 12px}.sidebar-bottom{margin-top:auto;padding:40px 10px 0}.edition{font:9px Consolas,monospace;white-space:nowrap}.edition>span:last-child{color:var(--muted)}.status-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:#7ca351;margin-right:5px}.sidebar-bottom p{font-size:13px;line-height:1.5;color:var(--muted);margin:19px 0}.sidebar-bottom a{font-size:11px;display:flex;justify-content:space-between}.workspace{margin-left:256px}.topbar{height:78px;display:flex;align-items:center;justify-content:space-between;gap:18px;border-bottom:1px solid var(--line);padding:0 38px;background:var(--bg);position:sticky;top:0;z-index:20}#breadcrumb{font:10px Consolas,monospace;letter-spacing:1px;color:var(--muted)}.header-actions{display:flex;gap:18px;align-items:center}.mode-switch{display:flex;border:1px solid var(--line);border-radius:7px;padding:3px;background:var(--paper)}.mode-switch button{border:0;background:none;padding:7px 13px;font-size:11px;border-radius:4px;color:var(--muted)}.mode-switch button[aria-pressed=true]{background:var(--ink);color:var(--bg)}.mode-dot{display:inline-block;height:5px;width:5px;background:#9dc48c;border-radius:50%;margin-left:5px}.icon-button{background:transparent;border:0;padding:7px;font-size:19px;line-height:1}.mobile-menu{display:none}main{padding:40px 38px 60px;max-width:1540px;margin:auto;min-height:80vh}.footer{padding:22px 38px;border-top:1px solid var(--line);font-size:10px;display:flex;justify-content:space-between;gap:14px;color:var(--muted)}
.home-top{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:24px}.pill{display:inline-flex;gap:8px;align-items:center;border:1px solid var(--line);border-radius:30px;padding:5px 11px;font-size:9px;font-weight:600;letter-spacing:1px}.home-top .mono{font-size:10px;color:var(--muted)}.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:10px;min-height:365px;border-bottom:1px solid var(--line);padding-bottom:30px}.hero-copy{padding:15px 0 10px}.hero h1{max-width:620px;font-size:clamp(42px,4.4vw,70px);line-height:1.04;letter-spacing:-3px;margin-bottom:22px;font-weight:550}.hero h1 em{font-family:Georgia,serif;font-weight:400;color:var(--accent)}.hero p{max-width:400px;color:var(--muted);font-size:14px;line-height:1.75}.button{display:inline-flex;align-items:center;justify-content:center;gap:16px;padding:12px 18px;border:1px solid var(--line);border-radius:6px;font-size:12px;font-weight:600;background:var(--paper);text-decoration:none}.button:hover{filter:brightness(.96);text-decoration:none}.button.primary{background:var(--ink);color:var(--bg);border-color:var(--ink)}.button.small{font-size:11px;padding:8px 12px}.button.text{background:transparent;border-color:transparent;color:var(--muted);padding-left:0}.hero-actions{display:flex;gap:12px;margin-top:27px;flex-wrap:wrap}.hero-visual{position:relative;min-width:0;border-radius:8px;align-self:center}.hero-visual svg{width:100%;height:auto;display:block}.visual-label{position:absolute;bottom:10px;left:24px;font:8px Consolas,monospace;color:var(--muted);letter-spacing:1px}.hero-stats{display:flex;gap:0;margin:25px 0 33px;border-bottom:1px solid var(--line);padding-bottom:25px}.hero-stat{flex:1;padding:0 22px;border-right:1px solid var(--line)}.hero-stat:first-child{padding-left:0}.hero-stat:last-child{border:0}.hero-stat strong{font-size:25px;font-weight:500;letter-spacing:-1px;display:block}.hero-stat span{font-size:10px;color:var(--muted)}.home-grid{display:grid;grid-template-columns:minmax(0,1fr) 278px;gap:30px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:19px}.section-heading h2{font-size:24px;margin:0}.section-heading .mono{font-size:9px;color:var(--muted)}.lesson-card{display:grid;grid-template-columns:44px 1fr 38px;align-items:center;gap:14px;padding:20px 0;border-top:1px solid var(--line);transition:background .2s}.lesson-card:hover{background:var(--wash);text-decoration:none}.lesson-card:last-child{border-bottom:1px solid var(--line)}.lesson-card .number{font:21px Consolas,monospace;color:#92a18e;font-weight:300}.lesson-card h3{font-size:16px;margin:0 0 6px;letter-spacing:-.4px}.lesson-card p{font-size:11px;color:var(--muted);margin:0;max-width:480px}.lesson-card .card-arrow{justify-self:end;border:1px solid var(--line);height:29px;width:29px;border-radius:50%;display:grid;place-items:center;font-size:14px}.card-meta{font:9px Consolas,monospace;color:var(--muted);margin-bottom:5px}.panel{border:1px solid var(--line);padding:22px;border-radius:8px;background:var(--paper)}.panel h3{font-size:19px;margin:12px 0}.panel p{font-size:12px;color:var(--muted)}.panel .eyebrow{font-size:8px}.progress-panel{margin-bottom:20px}.progress-track{height:4px;background:var(--line);border-radius:3px;margin:17px 0 11px;overflow:hidden}.progress-fill{height:100%;background:var(--accent);transition:width .3s}.progress-caption{display:flex;justify-content:space-between;font:9px Consolas,monospace;color:var(--muted)}.capstone-panel{background:var(--wash);border-color:var(--wash)}.capstone-panel svg{width:100%;margin:10px 0}.capstone-panel .button{width:100%;background:var(--paper);margin-top:6px}.note-line{font-size:10px;color:var(--muted);margin:17px 2px}.course-bottom{border-top:1px solid var(--line);margin-top:34px;padding-top:20px;display:flex;gap:28px;font-size:11px;color:var(--muted)}
.page-head{max-width:850px;margin:10px 0 36px}.page-head .eyebrow{margin-bottom:14px}.page-head h1{font-size:clamp(33px,3.5vw,53px);margin:0 0 18px;max-width:800px;letter-spacing:-2px}.page-head>p{font-family:Georgia,serif;font-size:20px;color:var(--muted);max-width:720px}.page-meta{display:flex;gap:18px;font:10px Consolas,monospace;color:var(--muted);flex-wrap:wrap}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 235px;gap:35px}.reader{min-width:0;max-width:900px}.reader-section{padding:0 0 32px;margin-bottom:32px;border-bottom:1px solid var(--line);scroll-margin-top:100px}.reader-section h2{font-size:29px;line-height:1.2;margin-bottom:22px}.reader-section h3{font-size:22px;line-height:1.3;margin:24px 0 16px}.reader-section p,.reader-section li{font-size:15px;line-height:1.85}.reader-section a,.resource-body a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}.reader-section strong{font-weight:650}.reader-section ul,.reader-section ol{padding-left:23px}.reader-section li{padding:3px 0}.reader-section blockquote{border-left:3px solid var(--accent);margin:20px 0;padding:14px 20px;background:var(--wash);font-size:14px}.code-block{margin:24px 0;background:var(--code);color:var(--code-ink);border-radius:8px;overflow:hidden;position:relative;border:1px solid #416059}.code-head{display:flex;justify-content:space-between;align-items:center;padding:8px 15px;border-bottom:1px solid #ffffff18;font:9px Consolas,monospace;color:#b8cfbd;letter-spacing:1px}.copy-button{font:10px "Segoe UI",sans-serif;border:1px solid #ffffff30;color:#deead7;background:transparent;padding:3px 8px;border-radius:4px;letter-spacing:0}.code-block pre{padding:18px 20px}.table-wrap{overflow:auto;margin:22px 0;border:1px solid var(--line);border-radius:7px}table{width:100%;border-collapse:collapse;font-size:12px;line-height:1.7}th,td{text-align:left;padding:11px 13px;border-bottom:1px solid var(--line);vertical-align:top}th{background:var(--wash);font-weight:650}tr:last-child td{border-bottom:0}.check-section{display:flex;justify-content:flex-end;margin-top:20px}.check-button{border:1px solid var(--line);font-size:10px;padding:6px 10px;background:transparent;color:var(--muted)}.check-button[aria-pressed=true]{background:var(--wash);color:var(--accent)}.lesson-rail{align-self:start;position:sticky;top:104px}.lesson-rail .eyebrow{margin-bottom:13px}.toc{display:flex;flex-direction:column;gap:2px;margin-bottom:25px}.toc a{font-size:11px;color:var(--muted);padding:8px 0 8px 12px;border-left:1px solid var(--line);line-height:1.5}.toc a:hover{border-color:var(--accent);color:var(--accent)}.rail-box{padding:17px;background:var(--wash);border-radius:7px;margin-bottom:16px}.rail-box h3{font-size:14px;letter-spacing:-.3px;margin:0 0 10px}.rail-box p{font-size:11px;line-height:1.8;color:var(--muted);margin:0}.rail-link{font-size:10px;display:block;margin:11px 0;color:var(--muted)}.notes-label{font-size:10px;color:var(--muted);display:block;margin:16px 0 6px}.notes-input{width:100%;min-height:115px;resize:vertical;padding:10px;font-size:11px;line-height:1.7}.saved-caption{font-size:9px;color:var(--muted)}.lesson-next{display:flex;justify-content:space-between;gap:12px;margin:32px 0}.callout{padding:17px 20px;border-left:3px solid var(--orange);background:var(--wash);font-size:12px;margin-bottom:28px;line-height:1.8}.callout p:last-child{margin-bottom:0}
.interactive-lab{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:24px;margin:10px 0 38px;scroll-margin-top:100px}.lab-top{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px}.lab-top h2{font-size:21px;margin:0;letter-spacing:-.6px}.lab-top .pill{font-size:8px;padding:3px 8px}.lab-description{font-size:12px;color:var(--muted);margin-bottom:22px}.lab-controls{display:flex;gap:20px;flex-wrap:wrap;margin:15px 0}.lab-controls label{flex:1;min-width:160px;font-size:11px;color:var(--muted)}.lab-controls select{display:block;width:100%;padding:9px 12px;margin-top:6px}.lab-controls input[type=range]{display:block;width:100%;margin:15px 0 5px;accent-color:var(--accent)}.lab-output{background:var(--wash);border-radius:7px;padding:15px 18px;font-size:12px;line-height:1.7}.lab-output strong{color:var(--accent)}.graph-diagram{display:grid;grid-template-columns:1fr 30px 1.15fr 30px 1fr;align-items:center;margin:25px 0}.graph-node{padding:17px 8px;border:1px solid var(--line);border-radius:7px;background:var(--wash);font-size:11px;line-height:1.5}.graph-node.selected{border-color:var(--accent);box-shadow:0 0 0 2px var(--wash)}.graph-node small{display:block;color:var(--muted);font:8px Consolas,monospace;margin-top:6px}.graph-topic{font:9px Consolas,monospace;text-align:center;overflow-wrap:anywhere}.graph-arrow{color:var(--accent);text-align:center}.pulse-line{height:3px;background:var(--line);margin-top:10px;overflow:hidden}.pulse-line:after{content:'';display:block;width:35%;height:3px;background:var(--accent);animation:flow 2s linear infinite}.graph-paused .pulse-line:after{animation-play-state:paused;opacity:.2}.graph-actions{display:flex;gap:10px;align-items:center;justify-content:space-between;margin-bottom:10px}.graph-actions span{font-size:10px;color:var(--muted)}@keyframes flow{from{transform:translateX(-110%)}to{transform:translateX(400%)}}.lab-svg{display:block;width:100%;height:auto;background:var(--bg);border:1px solid var(--line);border-radius:7px;margin:15px 0}.lab-svg text{font-family:Consolas,monospace}.tf-tree{display:flex;flex-wrap:wrap;align-items:center;gap:7px;margin:24px 0}.tf-tree button{font:11px Consolas,monospace;padding:10px;background:var(--wash)}.tf-tree button[aria-pressed=true]{border-color:var(--accent)}.lab-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:20px}.lab-metric{padding:14px;background:var(--bg);border-radius:6px}.lab-metric strong{display:block;font:22px Consolas,monospace}.lab-metric span{font-size:9px;color:var(--muted)}.terminal-sim{border-radius:7px;background:var(--code);color:#deead7;padding:18px;font:11px/1.8 Consolas,monospace}.terminal-sim label{display:block;color:#a7c79f;margin-bottom:10px}.terminal-command{display:flex;gap:8px;align-items:center}.terminal-command input{width:100%;border:0;background:transparent;color:#deead7;border-radius:0;padding:7px}.terminal-sim pre{font:11px/1.9 Consolas,monospace;white-space:pre-wrap;min-height:70px;margin-top:15px}.terminal-suggestions{display:flex;gap:6px;flex-wrap:wrap;margin-top:13px}.terminal-suggestions button{font:9px Consolas,monospace;padding:5px 8px;background:transparent;color:var(--muted)}.readiness-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.readiness-list label{display:flex;gap:10px;padding:12px;border:1px solid var(--line);border-radius:6px;font-size:11px;align-items:center}.readiness-list input{accent-color:var(--accent)}
.quiz{margin-top:35px;border-top:1px solid var(--line);padding-top:28px}.quiz>h2{font-size:28px;margin-bottom:10px}.quiz>p{font-size:12px;color:var(--muted)}.quiz-card{padding:20px;border:1px solid var(--line);border-radius:8px;margin:15px 0;background:var(--paper)}.quiz-card legend{font-size:14px;font-weight:600;padding:0 3px;letter-spacing:-.2px}.quiz-card fieldset{margin:0;padding:0;border:0;min-width:0}.quiz-answers{display:flex;flex-direction:column;gap:8px;margin-top:15px}.quiz-answer{text-align:left;background:transparent;border:1px solid var(--line);padding:10px 13px;font-size:12px;line-height:1.6}.quiz-answer.selected{border-color:var(--orange);background:var(--wash)}.quiz-answer.correct{border-color:var(--accent);background:var(--wash)}.quiz-feedback{font-size:12px;color:var(--muted);margin:12px 0 0}.quiz-feedback:empty{display:none}.quiz-score{font:11px Consolas,monospace;margin-top:15px;color:var(--accent)}
.lecture-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;border:1px solid var(--line);border-radius:8px;padding:12px 16px;background:var(--paper);margin-bottom:24px}.lecture-toolbar .mono{font-size:11px;color:var(--muted)}.lecture-timer{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.lecture-timer strong{font:19px Consolas,monospace;min-width:70px}.lecture-timer button{font-size:10px;padding:5px 9px;background:transparent}.lecture-stage{min-height:300px}.lecture-stage .reader-section p,.lecture-stage .reader-section li{font-size:18px;line-height:1.85}.lecture-stage .reader-section h2{font-size:37px}.lecture-stage .reader-section{margin-bottom:0}.lecture-stage .reader-section pre code{font-size:14px}.lecture-nav{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:25px 0}.lecture-nav span{font:10px Consolas,monospace;color:var(--muted)}.teacher-notes{margin-top:20px;border:1px dashed var(--line);border-radius:7px;padding:15px;font-size:12px;color:var(--muted)}.teacher-notes summary{cursor:pointer;font-weight:600;color:var(--ink)}.teacher-notes ul{padding-left:18px;line-height:1.9}.agenda-list{padding-left:17px;margin:10px 0;font-size:11px;color:var(--muted);line-height:2}.resource-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.resource-card{padding:24px;background:var(--paper);border:1px solid var(--line);border-radius:7px}.resource-card h2{font-size:21px;margin-bottom:12px}.resource-card p{font-size:12px;color:var(--muted);margin-bottom:0}.resource-card .eyebrow{margin-bottom:15px}.resource-body{max-width:850px}.source-browser{margin-top:35px}.source-browser select{width:100%;padding:12px;margin-bottom:10px;font-size:12px}.source-browser .code-block{margin-top:0}.resource-body>.button{margin-bottom:25px}.downloads-bar{display:flex;gap:10px;flex-wrap:wrap;margin:25px 0}.privacy-note{font-size:11px;color:var(--muted);line-height:1.8;margin-top:25px}.empty-state{padding:30px;text-align:center;color:var(--muted);font-size:13px}
dialog{border:1px solid var(--line);border-radius:12px;padding:26px;background:var(--paper);color:var(--ink);width:min(650px,90vw);box-shadow:0 35px 100px #0004;max-height:80vh}dialog::backdrop{background:#0b24299c;backdrop-filter:blur(5px)}.dialog-top{display:flex;justify-content:space-between;align-items:center;gap:15px}.dialog-top h2{font-size:25px;margin:0 0 20px}#search-input{width:100%;padding:13px 15px;font-size:14px}#search-results{max-height:48vh;overflow:auto;margin-top:16px}.search-result{display:block;padding:15px 10px;border-bottom:1px solid var(--line)}.search-result strong{font-size:13px}.search-result p{font-size:11px;color:var(--muted);margin:5px 0 0}.search-result small{font:9px Consolas,monospace;color:var(--accent)}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);padding:12px 20px;border-radius:7px;background:var(--ink);color:var(--bg);font-size:12px;box-shadow:var(--shadow);z-index:100;opacity:0;pointer-events:none;transition:opacity .2s}#toast.visible{opacity:1}.noscript{position:fixed;bottom:0;background:#fee8b9;color:#24322c;padding:20px;width:100%;z-index:100}
@media(min-width:1550px){main{padding:50px 60px}.topbar{padding:0 60px}.hero h1{font-size:76px}.hero{min-height:410px}.hero-visual{max-width:580px;justify-self:end}}
@media(max-width:1180px){.sidebar{width:220px;padding:28px 15px}.workspace{margin-left:220px}.topbar{padding:0 25px}main{padding:30px 25px}.hero h1{font-size:49px;letter-spacing:-2px}.hero{grid-template-columns:1.1fr 1fr;min-height:330px}.home-grid{grid-template-columns:minmax(0,1fr) 240px;gap:22px}.lesson-layout{grid-template-columns:minmax(0,1fr) 190px;gap:25px}.nav-item{font-size:11px}.hero-stat{padding:0 15px}}
@media(max-width:950px){.sidebar{width:200px;padding:24px 12px}.workspace{margin-left:200px}.brand{font-size:20px}.brand-sub{font-size:7px}.hero{grid-template-columns:1fr}.hero-visual{max-width:430px;justify-self:center;width:100%;margin-top:15px}.hero-copy p{max-width:580px}.hero{padding-bottom:20px}.hero h1{max-width:620px}.home-grid{grid-template-columns:1fr}.home-aside{display:grid;grid-template-columns:1fr 1fr;gap:20px}.progress-panel{margin:0}.home-aside>.note-line{grid-column:1/-1}.lesson-layout{grid-template-columns:1fr}.lesson-rail{position:static;display:grid;grid-template-columns:1fr 1fr;gap:15px}.lesson-rail .toc-block{grid-column:1/-1}.toc{display:flex;flex-direction:row;flex-wrap:wrap;gap:10px}.toc a{border:1px solid var(--line);padding:7px 10px;border-radius:5px}.notes-area{grid-column:1/-1}.header-actions{gap:10px}.topbar{padding:0 20px}#breadcrumb{font-size:8px}.mode-switch button{padding:7px 9px}.footer{flex-wrap:wrap}}
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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}
@media print{body{background:white;color:black}.sidebar,.topbar,.footer,.interactive-lab,.lesson-rail,.lecture-toolbar,.lecture-nav,.lesson-next,.check-section,.copy-button,.teacher-notes,.downloads-bar,.hero-actions,.home-aside,dialog,#toast{display:none!important}.workspace{margin:0}main{padding:0;max-width:none}.lesson-layout{display:block}.reader{max-width:none}.page-head h1{font-size:30pt}.reader-section h2{font-size:20pt}.reader-section p,.reader-section li{font-size:11pt;line-height:1.55}.reader-section{break-inside:auto}.code-block{background:#f1f1f1;color:#111;border:1px solid #ccc;break-inside:avoid}.code-head{color:#333;border-color:#ccc}.code-block pre{white-space:pre-wrap}.quiz-answer{color:#111}.hero{display:block}.hero-visual{max-width:400px}.quiz-card{break-inside:avoid}a{color:inherit}.callout{background:#eee}}
/* Figures are readable inline and open at full resolution on small screens. */
.learning-figure{margin:30px 0;border:1px solid var(--line,#d6dccd);border-radius:12px;overflow:hidden;background:#f6f3e9}
.learning-figure a{display:block;line-height:0}
.learning-figure img{display:block;width:100%;height:auto;max-width:100%;object-fit:contain}
.learning-figure figcaption{padding:14px 18px;font-size:.85rem;line-height:1.6;color:#344c40;background:#edf1e6}
.learning-figure figcaption span{display:block;font-size:.75rem;font-weight:700;margin-top:4px}
.lecture-body .learning-figure{max-width:980px}
@media print{.learning-figure{break-inside:avoid}.learning-figure figcaption span{display:none}}
.callout a{display:inline-block;max-width:100%;font-weight:650;text-decoration:underline;text-underline-offset:3px}