.course-layout{display:grid;grid-template-columns:1fr minmax(0,720px) 1fr;gap:0;max-width:1280px;margin:0 auto;padding:0 16px}.course-page{max-width:720px;width:100%;margin:0 auto;padding:48px 24px 80px;grid-column:2}.nav-sidebar{grid-column:1;position:relative}.nav-sidebar-inner{position:sticky;top:120px;padding:24px 12px 24px 48px;max-height:calc(100vh - 200px);overflow-y:auto}.nav-sidebar-inner::-webkit-scrollbar{display:none}.nav-sidebar-inner{scrollbar-width:none}.nav-sidebar .nav-label{font-family:var(--font-body);font-size:11px;font-weight:500;letter-spacing:2px;text-transform:uppercase;color:var(--text-dim);margin-bottom:16px;padding-left:12px}.nav-sidebar a{display:block;font-family:var(--font-body);font-size:13px;font-weight:400;color:var(--text-dim);text-decoration:none;padding:6px 12px;border-left:2px solid transparent;transition:color .25s,border-color .25s;line-height:1.4}.nav-sidebar a:hover{color:var(--text-secondary)}.nav-sidebar a.active{color:var(--text-primary);border-left-color:var(--warm-glow);font-weight:500}.glossary-sidebar{grid-column:3;position:relative}.glossary-sidebar-inner{position:sticky;top:120px;padding:24px 0 24px 12px;max-height:calc(100vh - 200px);overflow-y:auto}.glossary-sidebar-inner::-webkit-scrollbar{display:none}.glossary-sidebar-inner{scrollbar-width:none}.glossary-sidebar .glossary-label{font-family:var(--font-body);font-size:11px;font-weight:500;letter-spacing:2px;text-transform:uppercase;color:var(--text-dim);margin-bottom:16px;padding-left:4px}.glossary-entry{padding:5px 4px;font-family:var(--font-body);font-size:12px;line-height:1.4;color:var(--text-dim);transition:opacity .3s,max-height .4s;max-height:60px;overflow:hidden}.glossary-entry .abbr-key{font-weight:600;color:var(--text-secondary);font-size:12px;letter-spacing:.5px}.glossary-entry .abbr-full{color:var(--text-dim)}.glossary-entry.hidden{opacity:0;max-height:0;padding:0 4px;overflow:hidden}[id^=sec-],[id^=sub-]{scroll-margin-top:90px}.nav-sidebar a.nav-sub{font-size:12px;padding-left:20px;color:color-mix(in srgb,var(--text-dim) 80%,transparent)}.nav-sidebar a.nav-sub:hover{color:var(--text-dim)}.nav-sidebar a.nav-sub.active{color:var(--text-secondary);border-left-color:color-mix(in srgb,var(--warm-glow) 50%,transparent);font-weight:400}@media (max-width: 1200px){.course-layout{grid-template-columns:1fr}.nav-sidebar,.glossary-sidebar{display:none}.course-page{grid-column:1}}.back-link{display:inline-block;font-family:var(--font-body);font-size:12px;font-weight:400;letter-spacing:1.5px;text-transform:uppercase;color:var(--text-dim);text-decoration:none;margin-bottom:32px;transition:color .3s}.back-link:hover{color:var(--warm-glow)}.course-page h1{font-family:var(--font-display);font-size:36px;font-weight:400;color:var(--text-primary);letter-spacing:2px;margin-bottom:8px;text-align:center}.course-page .meta{font-family:var(--font-body);font-size:12px;font-weight:300;color:var(--text-dim);text-align:center;letter-spacing:1px;margin-bottom:48px}.session-badge{display:inline-block;font-family:var(--font-body);font-size:11px;font-weight:500;letter-spacing:2px;text-transform:uppercase;color:var(--warm-glow);border:1px solid var(--warm-glow);padding:4px 12px;margin-bottom:20px}.session-header{text-align:center;margin-bottom:48px}.session-title{font-family:var(--font-display);font-size:28px;font-weight:400;color:var(--text-primary);letter-spacing:1px;margin-bottom:8px;margin-top:12px}.session-subtitle{font-family:var(--font-body);font-size:13px;font-weight:300;color:var(--text-dim);letter-spacing:1px}.course-page h2{font-family:var(--font-display);font-size:20px;font-weight:500;color:var(--text-primary);margin:48px 0 16px;letter-spacing:.5px}.course-page h3{font-family:var(--font-display);font-size:16px;font-weight:500;color:var(--text-primary);margin:32px 0 12px;letter-spacing:.3px}.course-page p{font-family:var(--font-body);font-size:15px;font-weight:300;color:var(--text-secondary);line-height:1.85;margin-bottom:16px}.course-page strong{font-weight:500;color:var(--text-primary)}.course-page em{font-style:italic}.course-page ul{padding-left:20px;margin:12px 0 16px}.course-page li{font-family:var(--font-body);font-size:15px;font-weight:300;color:var(--text-secondary);line-height:1.8;margin-bottom:8px}.section-divider{border:none;border-top:1px solid var(--border-subtle);margin:40px 0}.formula-box{background:var(--warm-glow-soft);border:1px solid var(--border-warm);padding:20px 28px;margin:28px auto;text-align:center;font-family:var(--font-display);font-size:20px;font-weight:500;color:var(--text-primary);letter-spacing:1px;max-width:420px}.network-cascade{margin:20px 0 28px}.cascade-step{display:flex;gap:16px;align-items:flex-start;padding:12px 0;border-bottom:1px solid var(--border-subtle)}.cascade-step:last-child{border-bottom:none}.cascade-num{font-family:var(--font-body);font-size:10px;font-weight:600;letter-spacing:1.5px;color:var(--warm-glow);min-width:32px;padding-top:2px;flex-shrink:0}.cascade-content{flex:1}.cascade-name{font-family:var(--font-body);font-size:13px;font-weight:500;color:var(--text-primary);margin-bottom:3px}.cascade-abbr{font-weight:300;color:var(--text-dim);font-size:11px;letter-spacing:.5px;margin-left:6px}.cascade-desc{font-family:var(--font-body);font-size:13px;font-weight:300;color:var(--text-secondary);line-height:1.65}.niche-cards{display:flex;flex-direction:column;gap:10px;margin:20px 0 24px}.niche-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-left:2px solid var(--warm-glow);padding:14px 18px}.niche-label{font-family:var(--font-body);font-size:10px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:var(--warm-glow);margin-bottom:5px}.niche-card p{font-size:13px;margin-bottom:0;line-height:1.7;color:var(--text-secondary)}.niche-card strong{font-weight:500;color:var(--text-primary)}.debate-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:20px 0 24px}@media (max-width: 560px){.debate-grid{grid-template-columns:1fr}}.debate-card{background:var(--bg-card);border:1px solid var(--border-subtle);padding:18px}.debate-card.continuity{border-top:2px solid var(--warm-glow)}.debate-card.uniqueness{border-top:2px solid rgba(150,150,210,.5)}.debate-side{font-family:var(--font-body);font-size:10px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:var(--text-dim);margin-bottom:4px}.debate-author{font-family:var(--font-display);font-size:14px;font-weight:500;color:var(--text-primary);margin-bottom:12px;line-height:1.4}.debate-card ul{padding-left:14px;margin:0}.debate-card li{font-size:13px;line-height:1.65;margin-bottom:7px;color:var(--text-secondary)}.debate-card p{font-size:13px;margin-bottom:0;line-height:1.7;color:var(--text-secondary)}.debate-card strong{font-weight:500;color:var(--text-primary)}.tract-list{margin:16px 0 20px}.tract-row{display:flex;gap:12px;align-items:baseline;padding:9px 0;border-bottom:1px solid var(--border-subtle)}.tract-row:last-child{border-bottom:none}.tract-label{font-family:var(--font-body);font-size:10px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:var(--warm-glow);min-width:88px;flex-shrink:0}.tract-path{font-family:var(--font-body);font-size:13px;font-weight:300;color:var(--text-secondary);letter-spacing:.2px}.tract-path .arrow{color:var(--text-dim);margin:0 3px}.figure-block{margin:28px 0 32px;border:1px solid var(--border-subtle);background:var(--bg-card);padding:16px}.figure-block img{width:100%;display:block}.figure-block figcaption{font-family:var(--font-body);font-size:12px;font-weight:300;color:var(--text-dim);line-height:1.6;margin-top:10px;font-style:italic}.course-page table{width:100%;border-collapse:collapse;margin:24px 0;font-family:var(--font-body);font-size:13px}.course-page th{font-weight:500;color:var(--text-dim);text-transform:uppercase;letter-spacing:1px;font-size:11px;padding:10px 14px;border-bottom:1px solid var(--border-warm);text-align:left}.course-page td{padding:10px 14px;color:var(--text-secondary);border-bottom:1px solid var(--border-subtle);vertical-align:top;line-height:1.6}.course-page tr:last-child td{border-bottom:none}.level-tag{font-size:11px;font-weight:500;color:var(--warm-glow);letter-spacing:.5px;white-space:nowrap}.video-block{margin:36px 0}.video-label{font-family:var(--font-body);font-size:11px;font-weight:500;letter-spacing:2px;text-transform:uppercase;color:var(--text-dim);margin-bottom:10px;display:flex;align-items:center;gap:10px}.video-label:after{content:"";flex:1;height:1px;background:var(--border-subtle)}.video-wrapper{position:relative;padding-bottom:56.25%;height:0;overflow:hidden;background:#0000004d}.video-wrapper iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:none}.video-caption{font-family:var(--font-body);font-size:12px;font-weight:300;color:var(--text-dim);margin-top:8px;font-style:italic}.yt-facade{position:absolute;inset:0;cursor:pointer;display:flex;align-items:center;justify-content:center;background:#000}.yt-facade img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.82;transition:opacity .2s}.yt-facade:hover img{opacity:1}.yt-play-btn{position:relative;z-index:1;width:64px;height:44px;background:#c61c1ce0;border-radius:12px;display:flex;align-items:center;justify-content:center;transition:background .2s,transform .2s}.yt-facade:hover .yt-play-btn{background:#c00;transform:scale(1.08)}.yt-play-btn svg{fill:#fff;width:22px;height:22px}.video-wrapper.playing{box-shadow:0 0 0 1px var(--warm-glow)}.video-grid-label{font-family:var(--font-body);font-size:11px;font-weight:500;letter-spacing:2px;text-transform:uppercase;color:var(--text-dim);margin:32px 0 14px;display:flex;align-items:center;gap:10px}.video-grid-label:after{content:"";flex:1;height:1px;background:var(--border-subtle)}.video-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:8px}.video-grid-item{display:block}.video-grid-solo{max-width:50%;margin:12px 0 0}@media (max-width: 560px){.video-grid{grid-template-columns:1fr}.video-grid-solo{max-width:100%}}.question-list{margin:0;padding:0;list-style:none}.question-list li{display:flex;gap:20px;align-items:baseline;padding:14px 0;border-bottom:1px solid var(--border-subtle);font-family:var(--font-body);font-size:14px;font-weight:300;color:var(--text-secondary);line-height:1.65}.question-list li:first-child{border-top:1px solid var(--border-subtle)}.question-num{font-size:11px;font-weight:500;color:var(--warm-glow);letter-spacing:1px;min-width:24px;flex-shrink:0;padding-top:1px}.bibliography{margin-top:48px}.bib-item{font-family:var(--font-body);font-size:13px;font-weight:300;color:var(--text-dim);line-height:1.7;margin-bottom:12px;padding-left:20px;text-indent:-20px}.bib-item a{color:var(--warm-glow);text-decoration:none;opacity:.8;transition:opacity .2s}.bib-item a:hover{opacity:1}.bib-item em{font-style:italic}.act-nav{display:flex;justify-content:center;gap:0;margin-bottom:8px;border-bottom:1px solid var(--border-subtle);overflow-x:auto}.act-tab{font-family:var(--font-body);font-size:11px;font-weight:500;letter-spacing:1.2px;text-transform:uppercase;color:var(--text-dim);padding:12px 20px 10px;border:none;background:none;cursor:pointer;white-space:nowrap;border-bottom:2px solid transparent;transition:color .3s,border-color .3s;opacity:.45}.act-tab.active{color:var(--warm-glow);border-bottom-color:var(--warm-glow);opacity:1}.act-tab.upcoming{cursor:default;opacity:.25}.act-tab:not(.upcoming):hover{color:var(--warm-glow);opacity:.8}.time-machine{border-top:1px solid var(--border-subtle);padding:18px 0 14px;position:fixed;bottom:0;left:0;right:0;z-index:100;background:var(--bg-card);box-shadow:0 -2px 12px #0000004d;overflow:hidden}.time-machine-inner{max-width:672px;margin:0 auto;padding:0 32px;box-sizing:border-box}.tm-checks{display:flex;justify-content:space-between;gap:4px}.tm-check{display:flex;flex-direction:column;align-items:center;gap:4px;cursor:pointer;-webkit-tap-highlight-color:transparent;user-select:none;-webkit-user-select:none;flex:1;padding:4px 0}.tm-check input[type=checkbox]{-webkit-appearance:none;appearance:none;width:18px;height:18px;border:1.5px solid var(--border-subtle);border-radius:4px;cursor:pointer;transition:background .2s,border-color .2s;position:relative;flex-shrink:0}.tm-check input[type=checkbox]:checked{background:var(--warm-glow);border-color:var(--warm-glow)}.tm-check input[type=checkbox]:checked:after{content:"";position:absolute;left:5px;top:2px;width:5px;height:9px;border:solid var(--bg-card);border-width:0 2px 2px 0;transform:rotate(45deg)}.tm-check span{font-family:var(--font-body);font-size:11px;font-weight:400;color:var(--text-dim);transition:color .2s,font-weight .2s;letter-spacing:.01em}.tm-check input[type=checkbox]:checked+span{color:var(--warm-glow);font-weight:600}@media (max-width: 560px){.time-machine-inner{padding:0 16px}.tm-check span{font-size:10px}}.s2{transition:opacity .4s ease}p.s2,li.s2{color:color-mix(in srgb,var(--text-secondary) 70%,#c8956c 30%)}p.s2 strong,li.s2 strong{color:color-mix(in srgb,var(--text-primary) 70%,#c8956c 30%)}h3.s2{color:color-mix(in srgb,var(--text-primary) 75%,#c8956c 25%)}p.s2 em{color:color-mix(in srgb,var(--text-dim) 70%,#c8956c 30%)}span.s2{color:color-mix(in srgb,var(--text-secondary) 70%,#c8956c 30%)}span.s2 strong{color:color-mix(in srgb,var(--text-primary) 70%,#c8956c 30%)}div.s2 p,div.s2 li,div.s2 .cascade-desc,div.s2 .niche-card p{color:color-mix(in srgb,var(--text-secondary) 70%,#c8956c 30%)}div.s2 strong{color:color-mix(in srgb,var(--text-primary) 70%,#c8956c 30%)}div.s2 h3{color:color-mix(in srgb,var(--text-primary) 75%,#c8956c 25%)}.s2.hidden{display:none}.s3{transition:opacity .4s ease}p.s3,li.s3{color:color-mix(in srgb,var(--text-secondary) 70%,#c47a8a 30%)}p.s3 strong,li.s3 strong{color:color-mix(in srgb,var(--text-primary) 70%,#c47a8a 30%)}h3.s3{color:color-mix(in srgb,var(--text-primary) 75%,#c47a8a 25%)}p.s3 em{color:color-mix(in srgb,var(--text-dim) 70%,#c47a8a 30%)}span.s3{color:color-mix(in srgb,var(--text-secondary) 70%,#c47a8a 30%)}span.s3 strong{color:color-mix(in srgb,var(--text-primary) 70%,#c47a8a 30%)}div.s3 p,div.s3 li,div.s3 .cascade-desc,div.s3 .niche-card p{color:color-mix(in srgb,var(--text-secondary) 70%,#c47a8a 30%)}div.s3 strong{color:color-mix(in srgb,var(--text-primary) 70%,#c47a8a 30%)}div.s3 h3{color:color-mix(in srgb,var(--text-primary) 75%,#c47a8a 25%)}.s3.hidden{display:none}.s4{transition:opacity .4s ease}p.s4,li.s4{color:color-mix(in srgb,var(--text-secondary) 70%,#8a7ab8 30%)}p.s4 strong,li.s4 strong{color:color-mix(in srgb,var(--text-primary) 70%,#8a7ab8 30%)}h3.s4,h2.s4{color:color-mix(in srgb,var(--text-primary) 75%,#8a7ab8 25%)}p.s4 em{color:color-mix(in srgb,var(--text-dim) 70%,#8a7ab8 30%)}span.s4{color:color-mix(in srgb,var(--text-secondary) 70%,#8a7ab8 30%)}span.s4 strong{color:color-mix(in srgb,var(--text-primary) 70%,#8a7ab8 30%)}div.s4 p,div.s4 li,div.s4 .cascade-desc,div.s4 .niche-card p{color:color-mix(in srgb,var(--text-secondary) 70%,#8a7ab8 30%)}div.s4 strong{color:color-mix(in srgb,var(--text-primary) 70%,#8a7ab8 30%)}div.s4 h3{color:color-mix(in srgb,var(--text-primary) 75%,#8a7ab8 25%)}figure.s4 figcaption{color:color-mix(in srgb,var(--text-dim) 70%,#8a7ab8 30%)}.s4.hidden{display:none}.s5{transition:opacity .4s ease}p.s5,li.s5{color:color-mix(in srgb,var(--text-secondary) 70%,#6a9dab 30%)}p.s5 strong,li.s5 strong{color:color-mix(in srgb,var(--text-primary) 70%,#6a9dab 30%)}h3.s5,h2.s5{color:color-mix(in srgb,var(--text-primary) 75%,#6a9dab 25%)}p.s5 em{color:color-mix(in srgb,var(--text-dim) 70%,#6a9dab 30%)}span.s5{color:color-mix(in srgb,var(--text-secondary) 70%,#6a9dab 30%)}span.s5 strong{color:color-mix(in srgb,var(--text-primary) 70%,#6a9dab 30%)}div.s5 p,div.s5 li,div.s5 .cascade-desc,div.s5 .niche-card p{color:color-mix(in srgb,var(--text-secondary) 70%,#6a9dab 30%)}div.s5 strong{color:color-mix(in srgb,var(--text-primary) 70%,#6a9dab 30%)}div.s5 h3{color:color-mix(in srgb,var(--text-primary) 75%,#6a9dab 25%)}figure.s5 figcaption{color:color-mix(in srgb,var(--text-dim) 70%,#6a9dab 30%)}.s5.hidden{display:none}.s6{transition:opacity .4s ease}p.s6,li.s6{color:color-mix(in srgb,var(--text-secondary) 70%,#7a8ac4 30%)}p.s6 strong,li.s6 strong{color:color-mix(in srgb,var(--text-primary) 70%,#7a8ac4 30%)}h3.s6,h2.s6{color:color-mix(in srgb,var(--text-primary) 75%,#7a8ac4 25%)}p.s6 em{color:color-mix(in srgb,var(--text-dim) 70%,#7a8ac4 30%)}span.s6{color:color-mix(in srgb,var(--text-secondary) 70%,#7a8ac4 30%)}span.s6 strong{color:color-mix(in srgb,var(--text-primary) 70%,#7a8ac4 30%)}div.s6 p,div.s6 li,div.s6 .cascade-desc,div.s6 .niche-card p{color:color-mix(in srgb,var(--text-secondary) 70%,#7a8ac4 30%)}div.s6 strong{color:color-mix(in srgb,var(--text-primary) 70%,#7a8ac4 30%)}div.s6 h3{color:color-mix(in srgb,var(--text-primary) 75%,#7a8ac4 25%)}figure.s6 figcaption{color:color-mix(in srgb,var(--text-dim) 70%,#7a8ac4 30%)}.s6.hidden{display:none}.s7{transition:opacity .4s ease}p.s7,li.s7{color:color-mix(in srgb,var(--text-secondary) 70%,#8aab6a 30%)}p.s7 strong,li.s7 strong{color:color-mix(in srgb,var(--text-primary) 70%,#8aab6a 30%)}h3.s7,h2.s7{color:color-mix(in srgb,var(--text-primary) 75%,#8aab6a 25%)}p.s7 em{color:color-mix(in srgb,var(--text-dim) 70%,#8aab6a 30%)}span.s7{color:color-mix(in srgb,var(--text-secondary) 70%,#8aab6a 30%)}span.s7 strong{color:color-mix(in srgb,var(--text-primary) 70%,#8aab6a 30%)}div.s7 p,div.s7 li,div.s7 .cascade-desc,div.s7 .niche-card p{color:color-mix(in srgb,var(--text-secondary) 70%,#8aab6a 30%)}div.s7 strong{color:color-mix(in srgb,var(--text-primary) 70%,#8aab6a 30%)}div.s7 h3{color:color-mix(in srgb,var(--text-primary) 75%,#8aab6a 25%)}figure.s7 figcaption{color:color-mix(in srgb,var(--text-dim) 70%,#8aab6a 30%)}.s7.hidden{display:none}h3.s8,h2.s8{color:color-mix(in srgb,var(--text-primary) 75%,#c4a55a 25%)}p.s8,li.s8{color:color-mix(in srgb,var(--text-secondary) 70%,#c4a55a 30%)}p.s8 strong,li.s8 strong{color:color-mix(in srgb,var(--text-primary) 70%,#c4a55a 30%)}.s8 .cascade-desc{color:color-mix(in srgb,var(--text-dim) 70%,#c4a55a 30%)}span.s8{color:color-mix(in srgb,var(--text-secondary) 70%,#c4a55a 30%)}span.s8 strong{color:color-mix(in srgb,var(--text-primary) 70%,#c4a55a 30%)}div.s8 p,div.s8 li,div.s8 .cascade-desc,div.s8 .niche-card p{color:color-mix(in srgb,var(--text-secondary) 70%,#c4a55a 30%)}div.s8 strong{color:color-mix(in srgb,var(--text-primary) 70%,#c4a55a 30%)}div.s8 h3{color:color-mix(in srgb,var(--text-primary) 75%,#c4a55a 25%)}figure.s8 figcaption{color:color-mix(in srgb,var(--text-dim) 70%,#c4a55a 30%)}.s8.hidden{display:none}.s9{transition:opacity .4s ease}p.s9,li.s9{color:color-mix(in srgb,var(--text-secondary) 70%,#ab6a8a 30%)}p.s9 strong,li.s9 strong{color:color-mix(in srgb,var(--text-primary) 70%,#ab6a8a 30%)}h3.s9,h2.s9{color:color-mix(in srgb,var(--text-primary) 75%,#ab6a8a 25%)}p.s9 em{color:color-mix(in srgb,var(--text-dim) 70%,#ab6a8a 30%)}span.s9{color:color-mix(in srgb,var(--text-secondary) 70%,#ab6a8a 30%)}span.s9 strong{color:color-mix(in srgb,var(--text-primary) 70%,#ab6a8a 30%)}div.s9 p,div.s9 li,div.s9 .cascade-desc,div.s9 .niche-card p{color:color-mix(in srgb,var(--text-secondary) 70%,#ab6a8a 30%)}div.s9 strong{color:color-mix(in srgb,var(--text-primary) 70%,#ab6a8a 30%)}div.s9 h3{color:color-mix(in srgb,var(--text-primary) 75%,#ab6a8a 25%)}figure.s9 figcaption{color:color-mix(in srgb,var(--text-dim) 70%,#ab6a8a 30%)}.s9.hidden,[data-session].hidden{display:none}.course-page p.hidden,.course-page h3.hidden,.course-page ul.hidden,.course-page ol.hidden,.course-page table.hidden,.course-page figure.hidden,.course-page .formula-box.hidden,.course-page .video-block.hidden,.course-page .video-grid.hidden,.course-page .video-grid-solo.hidden,.course-page .video-grid-label.hidden,.course-page .network-cascade.hidden,.course-page .niche-cards.hidden,.course-page .tract-list.hidden,.course-page .debate-grid.hidden,.course-page .figure-block.hidden{display:none}