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5vw;height:78px;gap:12px}.brand{font-size:12px}.brand small{font-size:7px;letter-spacing:0}.seal{width:34px;height:34px;font-size:10px}.week-nav{gap:1px}.week-nav a{padding:8px;font-size:12px}#library-button{font-size:11px;padding:7px}.hero{grid-template-columns:1fr;gap:34px;padding-top:40px}.hero h1{letter-spacing:-.025em}.hero-art{min-height:280px;padding:25px;border-top-left-radius:80px}.week-grid{grid-template-columns:1fr;gap:10px}.week-card h3{font-size:25px}.basis{grid-template-columns:1fr;gap:12px}.lecture{padding:18px 5vw 0}.lecture-toolbar{flex-wrap:wrap}.lecture-toolbar .tools{gap:0}.lecture-toolbar button{font-size:11px;padding:.5rem}.slide{min-height:calc(100vh - 255px)}.slide h1{letter-spacing:-.02em}.cards{grid-template-columns:1fr 1fr}.concept-card{padding:20px;min-height:0}.concept-card h2{font-size:19px}.concept-card p{font-size:15px}.sim{grid-template-columns:1fr;padding:20px}.options{grid-template-columns:1fr}.option{padding:16px}.footer-hint{display:none}.slide-footer{gap:10px}.footer-arrows button{padding:10px 14px}.schedule{grid-template-columns:1fr}.flow-node{min-width:120px;font-size:16px}.notes{padding:20px}.notes p{font-size:15px}td,th{padding:12px;font-size:14px}dialog{padding:20px;width:94vw;max-height:92vh}.dialog-top{top:-20px}.hero-meta{gap:16px;font-size:11px}}@media(max-width:480px){.brand small{display:none}.week-nav a{padding:6px}.cards{grid-template-columns:1fr}.lecture-toolbar .week-label{font-size:11px}.hero h1{font-size:38px}.page-count{font-size:11px}.slide-footer{padding:10px 0}.hero-art{box-shadow:8px 8px 0 var(--blue)}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}@media print{body{background:white;color:black}.topbar,#main,dialog,.site-footer{display:none!important}#print-root{display:block}.print-slide{break-after:page;padding:1cm 0;font-size:11pt}.print-slide h1{font-size:24pt}.print-slide h2{font-size:16pt}.print-slide .kicker{color:#813d31;font-size:10pt}.print-slide p,.print-slide li{font-size:12pt;line-height:1.6}.print-slide .formula{font-size:20pt;background:#eee;color:black}.print-slide .concept-card{min-height:0;background:white}.print-slide .notes{background:#f3f3f3}.print-slide .notes p{font-size:11pt}.print-slide a{color:black}.print-slide .sources-inline{font-size:9pt}.print-slide table{font-size:10pt}.print-slide th{background:#eee;color:black}.print-slide td,.print-slide th{font-size:10pt;padding:10px}.print-slide .cards{grid-template-columns:1fr 1fr}.print-slide details{display:block}.print-slide summary{display:none}.print-slide .activity .answer{font-size:11pt}.print-slide button{display:none}@page{size:A4 landscape;margin:14mm}}
.hero .hero-art .art-caption{color:#d0dbd4}.hero .hero-art .art-title{color:#e4c696}.sim svg{max-height:240px}

/* Embedded Paperlogy also covers diagrams, controls, and printed lecture notes. */
svg text{font-family:Paperlogy,'Malgun Gothic',sans-serif}button,input,select,textarea{font-family:inherit}.notes p{white-space:pre-line}

.reading-label{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 16px;margin-bottom:24px;background:#e9e2d2;border-radius:8px;font-size:13px}.reading-label span{font-weight:700;color:var(--accent)}.reading-label a{color:var(--ink)}.toc-badge{display:inline-block;margin-left:9px;padding:3px 7px;border-radius:4px;background:#e9e2d2;color:var(--accent);font-size:10px;font-weight:600}.card-count{line-height:1.7;text-align:right}@media(max-width:640px){.reading-label{align-items:flex-start;flex-direction:column;gap:8px}}
.week-card h3,.hero p{word-break:keep-all;overflow-wrap:anywhere}
.table-hint{display:none}.table-wrap th,.table-wrap td{word-break:keep-all;overflow-wrap:anywhere}@media screen and (max-width:640px){.table-wrap table{min-width:560px}.wide-table table{min-width:760px}.table-hint{display:block;font-size:12px;color:var(--muted);margin:18px 0 0}.table-wrap:focus-visible{outline:2px solid var(--accent);outline-offset:4px}}

/* Independent weekly lectures: shared chrome with Weeks 1–3. */
.topbar{position:fixed;inset:0 0 auto;height:72px;padding:0 30px;gap:24px;background:#f3f0e7f5;backdrop-filter:blur(12px);z-index:20}
.brand small{font-size:10px;letter-spacing:.04em}.header-progress{height:4px;background:var(--line);flex:1;min-width:20px}.header-progress span{display:block;height:100%;background:var(--accent)}
.week-nav{margin-left:0;gap:16px;white-space:nowrap}.week-nav a{padding:0;border:0;border-radius:0;text-decoration:underline;font-size:12px;font-weight:800}
.lecture{max-width:1440px;padding:92px 6vw 96px}.lecture-toolbar{position:sticky;top:72px;padding:14px 0;margin-bottom:20px;background:var(--paper);z-index:10;border-bottom:1px solid var(--line)}
.lecture-toolbar button{font-size:13px;padding:.6rem .8rem}.lecture-toolbar #core-toggle[aria-pressed=true]{background:var(--ink);color:white}
.slide{min-height:calc(100svh - 230px);padding:22px 0 30px}.slide h1{font-size:clamp(34px,4.4vw,68px);line-height:1.16;max-width:1200px;scroll-margin-top:150px}.lead{font-size:clamp(18px,1.8vw,26px);font-weight:600;max-width:1100px}
.bullets li{font-size:clamp(18px,1.8vw,25px);font-weight:600}.concept-card h2{font-size:clamp(21px,2.1vw,30px)}.concept-card p{font-size:18px}.concept-card{min-width:0;padding:26px}.cards{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
table{font-size:18px}.notes p{font-size:18px}.sources-inline{font-size:13px}.flow{gap:22px}.flow-node{font-size:20px;min-width:160px}.flow-node:not(:last-child):after{right:-21px}
.slide-footer{position:fixed;right:30px;bottom:24px;left:auto;background:var(--ink);color:white;padding:10px 12px;gap:15px;border:0;z-index:15}.slide-footer .progress-track,.slide-footer .footer-hint{display:none}.footer-arrows button{width:42px;height:42px;padding:0;background:#ffffff16;border-radius:0}.page-count{min-width:62px;text-align:center}
dialog{z-index:30}.notes{border-left:1px solid var(--line)}
@media(max-width:800px){.topbar{gap:12px;padding:0 20px}.brand{font-size:12px}.brand small{font-size:8px}.week-nav{gap:10px}.week-nav a{font-size:11px}.lecture{padding:92px 5vw 90px}.lecture-toolbar{gap:10px}.lecture-toolbar .tools{flex-wrap:wrap;margin-left:0}.slide h1{font-size:36px}.lead{font-size:19px}.concept-card p,.notes p{font-size:17px}.cards{grid-template-columns:1fr}.slide-footer{right:18px;bottom:16px}.flow{flex-direction:column;gap:26px}.flow-node{flex:auto;min-width:0;font-size:18px}.flow-node:not(:last-child):after{content:'↓';right:auto;left:calc(50% - 6px);top:auto;bottom:-25px}.header-progress{display:none}}
@media(max-width:480px){.topbar{gap:10px;padding:0 16px}.seal{width:32px;height:32px}.brand small{display:block;font-size:8px}.week-nav{margin-left:auto;gap:10px}.week-nav .syllabus-link{display:none}#library-button{font-size:11px;padding:0}.slide h1{font-size:32px}.lecture-toolbar .week-label{font-size:10px;line-height:1.6}.lecture-toolbar button{font-size:11px;padding:.5rem .55rem}}
@media print{.lecture{padding:0}.slide-footer,.topbar,.lecture-toolbar{display:none!important}.print-slide{min-height:0;break-after:page}.print-slide .flow{flex-direction:row}.print-slide .flow-node:after{content:'→';left:auto;right:-21px;top:40%;bottom:auto}.print-slide .notes{break-inside:avoid}.print-slide table,.print-slide .concept-card{break-inside:avoid}}

@media screen and (max-width:1050px){.flow{flex-direction:column;gap:26px}.flow-node{flex:auto;min-width:0}.flow-node:not(:last-child):after{content:"↓";right:auto;left:calc(50% - 6px);top:auto;bottom:-25px}}

.topbar .quiet{white-space:nowrap;flex-shrink:0}.brand{min-width:0}

/* Photographs, concept diagrams and embedded videos in the weekly lesson. */
.photo-grid{display:grid;grid-template-columns:1fr;gap:24px;margin:10px 0 32px}.photo-grid.photo-pair{grid-template-columns:1fr 1fr}.photo{margin:0;background:var(--cream);border:1px solid var(--line);min-width:0}.photo-original{display:block;background:#17201d;line-height:0}.photo img{width:100%;height:auto;max-height:480px;object-fit:contain;display:block}.photo figcaption{display:flex;flex-wrap:wrap;gap:8px 20px;align-items:baseline;padding:17px 22px 0;line-height:1.6}.photo figcaption strong{font-size:17px}.photo-credit{font-size:12px;color:var(--muted)}.photo-question{padding:12px 22px 22px;margin:0;font-size:18px;font-weight:600;line-height:1.65}.photo-question span{display:block;color:var(--accent);font-size:12px;margin-bottom:6px;letter-spacing:.05em}.concept-visual{margin:24px 0 30px;background:var(--cream);border:1px solid var(--line);padding:22px;min-width:0}.visual-label{font-size:14px;font-weight:800;color:var(--accent);margin-bottom:12px}.visual-scroll{overflow-x:auto}.visual-scroll img{width:100%;min-width:800px;height:auto;display:block}.concept-visual figcaption{font-size:13px;color:var(--muted);line-height:1.7;margin-top:10px}.concept-visual figcaption a{white-space:nowrap;margin-left:12px}.lecture-video{margin:24px 0 32px;background:var(--cream);border:1px solid var(--line);padding:24px}.video-heading span{font-size:12px;font-weight:800;color:var(--accent);letter-spacing:.06em}.video-heading h2{font-size:24px;margin:10px 0 20px;line-height:1.45}.video-embed{aspect-ratio:16/9;max-width:1000px;background:#17201d}.video-embed iframe{width:100%;height:100%;border:0;display:block}.video-focus{font-size:17px}.video-question{font-size:18px;line-height:1.7;background:var(--pale);padding:18px 22px}.video-question b{color:var(--accent)}.video-link{font-size:14px;margin-bottom:0}.visual-scroll:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
@media(max-width:800px){.photo-grid.photo-pair{grid-template-columns:1fr}.photo img{max-height:380px}.photo figcaption{padding:14px 16px 0}.photo figcaption strong{font-size:15px}.photo-question{padding:12px 16px 18px;font-size:16px}.concept-visual{padding:14px}.lecture-video{padding:16px}.video-heading h2{font-size:20px}.video-question{padding:14px;font-size:16px}.photo-credit{font-size:11px}}
@media print{.photo img{max-height:60mm}.photo-grid{break-inside:avoid}.photo-question{font-size:10pt}.photo figcaption strong{font-size:10pt}.photo-credit{font-size:8pt}.concept-visual{padding:10px;break-inside:avoid}.visual-scroll img{min-width:0;max-height:65mm;object-fit:contain}.video-embed{display:none}.lecture-video{break-inside:avoid;padding:12px}.video-heading h2{font-size:14pt}.video-focus,.video-question{font-size:10pt}.print-slide{break-after:page;break-inside:auto}}