/* Four distinct teaching modes, using the established site palette. */
.slide-stage.mode-divider{padding:0;overflow:hidden;position:relative;background:#101b24;isolation:isolate}.chapter-art{min-height:inherit;padding:35px 44px;display:flex;flex-direction:column;justify-content:space-between;position:relative;background:linear-gradient(90deg,#0b1925f5 0%,#10212acb 49%,#10212a19 100%),url('/assets/pixel-hero.webp') center/cover}.chapter-art-2,.chapter-art-5{background-image:linear-gradient(90deg,#0b1925f5,#10212ab5 52%,#10212a20),url('/assets/pixel-courses.webp');background-size:auto,auto 150%;background-position:center,left center}.chapter-art-3,.chapter-art-6{background-position:center,75% center}.chapter-art-4{background-image:linear-gradient(90deg,#131824f5,#181827b5 52%,#10212a20),url('/assets/pixel-hero.webp');background-position:center,85% center}.chapter-intro{padding:55px 0;max-width:850px}.chapter-intro h1{font-family:'Aptos Black',Aptos,system-ui,sans-serif;font-size:clamp(42px,5vw,70px);font-weight:900;line-height:1.08;margin:22px 0;max-width:800px}.chapter-intro .lead{font-size:23px;max-width:650px;color:#d6e2e6}.chapter-rule{height:4px;width:110px;background:var(--gold);margin-top:30px}.chapter-bottom{display:flex;justify-content:space-between;gap:15px;font-size:12px;color:#c7d4db;line-height:1.6}.slide-purpose{display:block;color:var(--teal);font-size:10px;font-weight:700;letter-spacing:2px;margin:0 0 17px}.lecture-first h1{font-size:clamp(29px,3.1vw,45px);line-height:1.12}.lecture-first .lead{font-size:21px;margin-top:18px;line-height:1.5;max-width:1050px}.teaching-notes{display:grid;grid-template-columns:repeat(auto-fit,minmax(235px,1fr));gap:25px;margin-top:28px}.teaching-notes article{border-top:2px solid var(--teal);padding:16px 0 0}.teaching-notes article:nth-child(2){border-color:var(--gold)}.teaching-notes article:nth-child(3){border-color:var(--violet)}.teaching-notes h3{font-size:19px;color:var(--text);margin:0 0 9px}.teaching-notes p{font-size:17px;line-height:1.55;color:#c4d2d9;margin:0}.teaching-notes.with-evidence{gap:20px;margin-top:20px}.teaching-notes.with-evidence p{font-size:16px}.evidence-stats{display:flex;gap:30px;margin-top:26px;flex-wrap:wrap}.evidence-stats>div{flex:1;min-width:190px;border-left:3px solid var(--gold);padding-left:18px}.evidence-stats strong{display:block;font-size:clamp(28px,3.4vw,46px);line-height:1.15;color:var(--gold);font-weight:900;letter-spacing:-1px}.evidence-stats span{display:block;font-size:14px;color:var(--muted);margin-top:9px;max-width:270px;line-height:1.5}.ownership-map{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:25px}.ownership-map article{background:#85cec40b;border:1px solid #85cec440;border-radius:12px;padding:18px 22px}.ownership-map article:nth-child(2){background:#e8bd760a;border-color:#e8bd7640}.ownership-map strong{font-size:47px;color:var(--teal);line-height:1}.ownership-map article:nth-child(2) strong{color:var(--gold)}.ownership-map h3{font-size:21px;margin:8px 0}.ownership-map p{font-size:15px;color:var(--muted);line-height:1.5}.teaching-table{overflow:auto;margin-top:25px}.teaching-table table{width:100%;border-collapse:collapse;text-align:left;font-size:17px}.teaching-table caption{text-align:left;color:var(--muted);font-size:13px;margin-bottom:12px;line-height:1.5}.teaching-table th,.teaching-table td{padding:15px;border-bottom:1px solid #ffffff20;line-height:1.4}.teaching-table thead{color:var(--teal);background:#85cec40a}.teaching-table td:last-child{color:var(--gold);font-weight:700}.measure-definitions{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin:22px 0}.measure-definitions>div{border-top:3px solid var(--gold);padding:14px 10px;background:#ffffff04}.measure-definitions dt{font-size:18px;color:var(--gold);margin-bottom:9px;font-weight:800}.measure-definitions dd{font-size:15px;line-height:1.5;color:#c4d2d9;margin:0}.slide-stage.mode-takeaway{background:radial-gradient(ellipse at right bottom,#85cec415,transparent 65%),#172b35;border-left:4px solid var(--teal)}.mode-takeaway .slide-purpose{color:var(--gold)}.mode-takeaway .lead{font-size:clamp(25px,2.9vw,39px);line-height:1.45;max-width:1020px}.mode-takeaway .teaching-notes{max-width:1000px}.remember-line{display:flex;flex-wrap:wrap;gap:24px;font-size:11px;letter-spacing:2px;color:var(--teal);margin-top:35px}.slide-stage.mode-activity{border-top:4px solid var(--violet);background:radial-gradient(ellipse at right top,#c5b5e511,transparent 70%),#1b2938}.mode-activity .slide-purpose{color:var(--violet)}.slide-stage.mode-question{position:relative;background:radial-gradient(ellipse at right,#e8bd7611,transparent 65%),#1c2b35;border-top:4px solid var(--gold)}.mode-question .slide-purpose{color:var(--gold)}.mode-question .lead{font-size:clamp(28px,3.6vw,48px);max-width:850px}.question-mark{font-size:130px;color:#e8bd7628;line-height:1;margin:25px 0}.question-followup{color:var(--muted);font-size:18px}.mode-teaching .chart-area{margin-top:23px}.mode-teaching .bar-row{font-size:15px}.mode-teaching .slide-source{margin-top:18px}.mode-comic .slide-purpose{color:var(--gold)}@media(max-width:900px){.measure-definitions{grid-template-columns:repeat(3,1fr)}.teaching-notes p{font-size:16px}.chapter-art{padding:30px}}@media(max-width:700px){.chapter-art{min-height:600px;padding:24px}.chapter-intro{padding:45px 0}.chapter-intro h1{font-size:41px}.chapter-intro .lead{font-size:19px}.chapter-bottom{display:block;font-size:11px}.chapter-bottom span{display:block;margin-top:8px}.lecture-first h1{font-size:30px}.lecture-first .lead{font-size:18px}.teaching-notes,.ownership-map{grid-template-columns:1fr;gap:18px}.teaching-notes p,.teaching-notes.with-evidence p{font-size:16px}.evidence-stats{gap:18px}.evidence-stats>div{min-width:100%}.measure-definitions{grid-template-columns:1fr 1fr}.measure-definitions dt{font-size:17px}.measure-definitions dd{font-size:14px}.teaching-table table{font-size:14px;min-width:400px}.teaching-table td,.teaching-table th{padding:10px}.mode-takeaway .lead{font-size:26px}.mode-question .lead{font-size:30px}}