/* Showcase layer: semantic palette, dark mode, chapter nav, and the paper-driven interactive components. */
:root{
  --ours:#3b5bdb;--ours-soft:#edf1ff;
  --cpt:#e8893a;--cpt-soft:#fff1e6;
  --sft:#7c5cd6;--sft-soft:#f0ebff;
  --rl:#2447c9;--rl-soft:#e6ecff;
  --base:#9aa3b2;--base-soft:#f1f3f6;
  --baseline:#aab3c5;--baseline-soft:#e6e9f0;
  --nav-type:#4f7bd9;--dlg-type:#9a6fd6;--cmb-type:#e06a5a;--ui-type:#3fa88f;--puz-type:#e5a53a;
  --up:#1f9d6b;--down:#d64c4c;
  --surface:#fff;--surface-2:#f7f8fb;--ink-on-dark:#edf2ff;
  --blue:var(--ours)
}
html[data-theme=dark]{
  --ink:#e8ecf5;--secondary:#b4bccc;--muted:#8891a3;--line:#242b3a;--alt:#0f1420;--surface:#141a28;--surface-2:#10151f;
  --ours-soft:#1a2340;--cpt-soft:#2b1e14;--sft-soft:#221a36;--rl-soft:#15203f;--base-soft:#1a1f2a;--baseline-soft:#1e2433;
  color-scheme:dark
}
html[data-theme=dark] body{background:#0b0f1a}
html[data-theme=dark] .nav{background:#0b0f1aee;border-color:var(--line)}
html[data-theme=dark] .nav nav a{color:var(--secondary)}html[data-theme=dark] .brand{color:var(--ink)}

html[data-theme=dark] .video-card,html[data-theme=dark] .paper-figure,html[data-theme=dark] .figure-details,html[data-theme=dark] .story-feature,html[data-theme=dark] .comparison-panel,html[data-theme=dark] .engine-table,html[data-theme=dark] .result-panel,html[data-theme=dark] .resource-card,html[data-theme=dark] .memory-flow,html[data-theme=dark] .rollout-counts,html[data-theme=dark] .latency-panel,html[data-theme=dark] .video-figure,html[data-theme=dark] dialog,html[data-theme=dark] .segmented button[aria-pressed=true],html[data-theme=dark] .showcase-filters button{background:var(--surface);color:var(--ink);border-color:var(--line)}
html[data-theme=dark] .segmented{background:#1b2130}html[data-theme=dark] .paper-figure>a,html[data-theme=dark] .hero-framework>a{background:#fff;border-radius:8px}
html[data-theme=dark] .memory-flow span{background:var(--ours-soft);color:#b8c6ff}html[data-theme=dark] .memory-flow #memory-mode-title{background:var(--ours);color:#fff}
html[data-theme=dark] .engine-summary{background:var(--ours-soft);border-color:#2a3660}html[data-theme=dark] .stats-band{background:var(--alt)}
html[data-theme=dark] .highlight,html[data-theme=dark] .comparison-row.ours{background:var(--ours-soft);color:#b8c6ff}
html[data-theme=dark] .pill{background:#1b2130;color:var(--ink)}html[data-theme=dark] .pill-accent{background:#ffd56a;color:#14161a}
html[data-theme=dark] .team-plaque{background:#141a28ee;color:var(--ink)}
html[data-theme=dark] img.paper-figure{background:#fff}
html[data-theme=dark] .method-tags>span{background:var(--ours-soft);border-color:#2a3660;color:#b8c6ff}
html[data-theme=dark] table th{color:var(--muted)}html[data-theme=dark] .showcase-filters button[aria-pressed=true]{background:var(--ours);color:#fff;border-color:var(--ours)}
html[data-theme=dark] .stage-track,html[data-theme=dark] .latency-track,html[data-theme=dark] .research-track{background:#1e2434}
html[data-theme=dark] .data-metrics>div,html[data-theme=dark] .infra-metrics>div,html[data-theme=dark] .hierarchy-cards article,html[data-theme=dark] .result-callouts>div,html[data-theme=dark] .infra-flow article,html[data-theme=dark] .streaming-metric,html[data-theme=dark] .training-notes>div,html[data-theme=dark] .memory-notes article{background:var(--surface);border-color:var(--line)}

/* Unify the title gradient with the palette (blue → violet), reserve orange for CPT. */
.gradient-title{background:linear-gradient(100deg,#c5d2ff 0%,#8ea4ff 45%,#b79bff 100%);background-clip:text;-webkit-background-clip:text}
.team-plaque{background:transparent;box-shadow:none;border:1px solid #ffffff2e;margin:24px auto 0;color:#dfe6ff;padding:9px 22px;gap:18px}.team-plaque strong{color:#fff;font-size:22px;letter-spacing:-.8px}.team-plaque span{color:#c0cbea;border-color:#ffffff33;font-size:13px}
.hero{padding-bottom:0}.hero .hero-media{margin-top:30px}.hero-lede{max-width:760px;margin:16px auto 0;font-size:15px;color:#ffffffc9;line-height:1.75}.hero-lede b{color:#fff;font-weight:600}
.hero-strip{margin-top:28px;border-top:1px solid #ffffff1c;background:#070a12}

/* Nav: chapter groups, scroll-spy, progress bar, theme toggle */
#read-progress{position:fixed;top:0;left:0;height:2px;width:100%;background:var(--ours);transform-origin:0 50%;transform:scaleX(0);z-index:40;pointer-events:none}
.nav nav{gap:4px}.nav nav a{padding:6px 10px;border-radius:999px}.nav nav a.current{color:var(--ours);background:var(--ours-soft)}
.nav nav .nav-chapter{font-size:10px;letter-spacing:1.2px;text-transform:uppercase;color:var(--muted);padding:0 6px 0 14px;font-weight:700;border-left:1px solid var(--line);margin-left:6px}.nav nav .nav-chapter:first-child{border:0;margin:0;padding-left:0}
#theme-toggle{border:1px solid var(--line);background:transparent;color:var(--secondary);border-radius:999px;width:34px;height:34px;display:grid;place-items:center;font-size:15px;margin-left:-14px}#theme-toggle:hover{color:var(--ours);border-color:var(--ours)}
html[data-theme=dark] #theme-toggle{color:#ffd56a}
.chapter-marker{display:flex;align-items:center;gap:16px;margin:0 0 14px;font-size:11px;font-weight:700;letter-spacing:1.8px;text-transform:uppercase;color:var(--muted)}.chapter-marker b{color:var(--ours);font-size:13px;letter-spacing:1px}.chapter-marker i{flex:1;height:1px;background:var(--line)}
.chapter-intro{padding:52px 0 0}.chapter-intro h2{font-size:clamp(32px,3.6vw,46px);max-width:900px}.chapter-intro .lead{max-width:860px}
#real-time{padding-bottom:clamp(48px,6vw,80px)}

/* Reveal */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}.reveal.is-visible{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* 48-game marquee */
.game-marquee{overflow:hidden;position:relative;padding:14px 0;mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.marquee-track{display:flex;gap:10px;width:max-content;animation:marquee 110s linear infinite}
.marquee-item{display:inline-flex;flex-direction:column;gap:1px;padding:8px 14px;border:1px solid #ffffff22;border-radius:9px;background:#ffffff0a;white-space:nowrap}.marquee-item b{font-size:12px;color:#eef2ff;font-weight:600}
@keyframes marquee{to{transform:translateX(-50%)}}
@media(prefers-reduced-motion:reduce){.marquee-track{animation:none;flex-wrap:wrap;width:auto;justify-content:center}}

/* Stats band with comparisons */
.stats>a strong{color:var(--ours)}.stats>a .versus{display:block;margin-top:7px;font-size:11px;color:var(--secondary);font-weight:500}.stats>a .versus b{color:var(--down);font-weight:700}.stats>a .versus b.up{color:var(--up)}

/* Pipeline overview */
#pipeline{padding-bottom:clamp(48px,6vw,80px)}
.pipeline{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:0;margin:30px 0 10px;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--surface)}
.pipeline a{position:relative;display:block;padding:22px 20px 20px;color:var(--ink);border-left:1px solid var(--line);text-decoration:none;transition:background .2s}.pipeline a:first-child{border-left:0}.pipeline a:hover{background:var(--alt);text-decoration:none}
.pipeline a::before{content:'';position:absolute;left:0;right:0;top:0;height:4px;background:var(--stage-color,var(--ours))}
.pipeline .step-no{display:block;font-size:10px;font-weight:700;letter-spacing:1.4px;color:var(--stage-color,var(--ours))}.pipeline h3{font-size:16px;margin:9px 0 5px;letter-spacing:-.3px}.pipeline p{font-size:12px;color:var(--secondary);margin:0 0 12px;line-height:1.6}
.pipeline strong{display:block;font-size:22px;letter-spacing:-.7px;color:var(--stage-color,var(--ours))}.pipeline small{display:block;font-size:10px;color:var(--muted);margin-top:2px}
.pipeline .s-data{--stage-color:#5b6b85}.pipeline .s-cpt{--stage-color:var(--cpt)}.pipeline .s-sft{--stage-color:var(--sft)}.pipeline .s-rl{--stage-color:var(--rl)}.pipeline .s-engine{--stage-color:#1c9a8a}
.pipeline-note{display:flex;gap:30px;flex-wrap:wrap;margin:18px 0 0;font-size:12px;color:var(--secondary)}.pipeline-note span b{color:var(--ink)}

/* Agent comparison (Table 1) */
.agent-table-wrap{margin-top:28px;border:1px solid var(--line);border-radius:14px;overflow:auto;background:var(--surface)}
.agent-table{font-size:13px;white-space:nowrap}.agent-table th:first-child,.agent-table td:first-child{text-align:left}.agent-table td,.agent-table th{text-align:center}.agent-table th:nth-child(-n+4),.agent-table td:nth-child(-n+4){text-align:left}
.agent-table td.yes{color:var(--up);font-weight:700;font-size:15px}.agent-table td.no{color:var(--base);font-size:15px}.agent-table tr.highlight th,.agent-table tr.highlight td{background:var(--ours-soft);font-weight:700;color:var(--ours)}.agent-table tr.highlight td.yes{color:var(--up)}

/* Stage badges on recording cards */
.stage-badge{position:absolute;left:9px;top:9px;padding:3px 8px;border-radius:5px;font-size:9.5px;font-weight:800;letter-spacing:.8px;color:#fff;background:var(--base)}
.stage-badge.stage-cpt{background:var(--cpt)}.stage-badge.stage-sft{background:var(--sft)}.stage-badge.stage-rl{background:var(--rl)}.stage-badge.stage-base{background:var(--base)}
.tag-row{display:flex;gap:6px;flex-wrap:wrap;align-items:center;margin-top:10px}.tag-row .type-tag{margin:0!important}.ability-tag{font-size:10px;font-weight:600;color:var(--secondary);background:var(--alt);border:1px solid var(--line);padding:2px 8px;border-radius:99px}
.hover-preview{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;background:#000}
.stage-legend{display:flex;gap:14px;flex-wrap:wrap;font-size:11px;color:var(--secondary);margin:14px 0 0}.stage-legend span{display:inline-flex;align-items:center;gap:6px}.stage-legend i{width:10px;height:10px;border-radius:3px;background:var(--base)}.stage-legend .cpt i{background:var(--cpt)}.stage-legend .sft i{background:var(--sft)}.stage-legend .rl i{background:var(--rl)}

/* Grouped recordings */
.video-grid.grouped{display:block}
.mechanic-group{margin-top:34px;padding-top:26px;border-top:1px solid var(--line)}.mechanic-group:first-child{border-top:0;padding-top:0;margin-top:14px}
.mechanic-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:16px;flex-wrap:wrap}.mechanic-head h3{font-size:22px;letter-spacing:-.5px;margin:0 0 3px}.mechanic-head p{margin:0;font-size:12px;color:var(--muted)}.mechanic-desc{max-width:420px;font-size:13px!important;color:var(--secondary)!important}
.mechanic-row{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,2fr);gap:17px;align-items:start}.mechanic-row:has(> :only-child){grid-template-columns:minmax(0,1.6fr)}
.mechanic-rest{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.mechanic-rest .video-card .video-meta{padding:10px 12px 12px}.mechanic-rest .video-card h3{font-size:13px;margin-bottom:2px}.mechanic-rest .video-meta p{font-size:10.5px}.mechanic-rest .tag-row{display:none}.mechanic-rest .play-icon{width:36px;height:36px;font-size:17px}.mechanic-rest .clip-duration{font-size:10px;padding:2px 6px}
.video-card.featured{border-top-width:4px;border-top-color:var(--ours)}.video-card.featured .video-meta{padding:18px 20px 20px}.video-card.featured h3{font-size:19px}.featured-note{font-size:12.5px!important;color:var(--secondary)!important;line-height:1.7;margin:10px 0 0!important}
.video-card.recording-card{border-top:4px solid var(--ours)}

/* Give video playback more room while keeping the dialog controls visible. */
#demo-dialog.wide-demo-dialog[open] {
  display: flex;
  flex-direction: column;
  width: min(1440px, calc(100% - 24px));
  max-width: none;
  max-height: calc(100dvh - 24px);
}
#demo-dialog.wide-demo-dialog > :not(.dialog-media) { flex-shrink: 0; }
#demo-dialog.wide-demo-dialog .dialog-media {
  display: flex;
  min-height: 96px;
}
#demo-dialog.wide-demo-dialog .dialog-media :is(video, img) { max-height: none; }
#demo-dialog.wide-demo-dialog .dialog-copy {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 4px 16px;
  padding: 12px 18px;
}
#demo-dialog.wide-demo-dialog .dialog-copy :is(h2, #dialog-status) { margin: 0; }

/* Action packet demo (Fig. 3) */
.action-demo{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:22px;margin:28px 0 0;border:1px solid var(--line);border-radius:14px;background:var(--surface);padding:24px;overflow:hidden}
.action-left h3,.action-right h3{font-size:12px;letter-spacing:1.3px;text-transform:uppercase;color:var(--muted);margin:0 0 12px;font-weight:700}
.action-think{min-height:64px;padding:12px 14px;border-radius:9px;background:var(--sft-soft);border-left:3px solid var(--sft);font-size:13px;line-height:1.7;color:var(--ink);font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.action-think.empty{color:var(--muted);background:var(--alt);border-left-color:var(--line)}
.packet{display:grid;grid-template-columns:auto repeat(6,minmax(0,1fr));gap:6px;align-items:stretch;margin-top:16px}
.packet .packet-mouse{display:flex;flex-direction:column;justify-content:center;gap:4px;padding:8px 10px;border-radius:8px;background:var(--alt);border:1px solid var(--line);font-size:11px;font-variant-numeric:tabular-nums;min-width:92px}.packet .packet-mouse span{font-size:9px;letter-spacing:1px;color:var(--muted);font-weight:700}
.packet-block{display:grid;place-items:center;min-height:44px;padding:6px 4px;border-radius:8px;border:1px solid var(--line);background:var(--alt);font-size:11px;font-weight:700;color:var(--muted);font-variant-numeric:tabular-nums;transition:background .15s,color .15s,transform .15s}.packet-block.held{color:var(--ink);background:var(--surface)}.packet-block.active{background:var(--ours);color:#fff;border-color:var(--ours);transform:translateY(-2px)}
.packet-scale{display:flex;justify-content:space-between;margin:6px 0 0 100px;font-size:9.5px;color:var(--muted)}
.action-serial{margin:16px 0 0;padding:10px 12px;border-radius:8px;background:#0f1420;color:#b8c6ff;font-size:11px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;white-space:nowrap;overflow:auto}
.action-note{font-size:12px;color:var(--secondary);margin:12px 0 0;min-height:20px}
.action-controls{display:flex;gap:8px;align-items:center;margin-top:14px;font-size:11px;color:var(--muted)}.action-controls button{border:1px solid var(--line);background:var(--surface);color:var(--ours);border-radius:999px;padding:6px 12px;font-size:12px;font-weight:600}.action-controls span{margin-left:auto;font-variant-numeric:tabular-nums}
.keyboard{display:flex;flex-direction:column;gap:6px;align-items:center;padding:16px;border-radius:12px;background:var(--alt);border:1px solid var(--line)}.key-row{display:flex;gap:6px}.key{min-width:44px;padding:9px 10px;text-align:center;border-radius:7px;background:var(--surface);border:1px solid var(--line);border-bottom-width:3px;font-size:12px;font-weight:700;color:var(--secondary);transition:all .12s}.key.down{background:var(--ours);border-color:var(--rl);color:#fff;transform:translateY(2px);border-bottom-width:1px}
.mouse-pad{position:relative;height:110px;margin-top:12px;border-radius:12px;background:var(--alt);border:1px solid var(--line);display:grid;place-items:center;overflow:hidden}.mouse-pad::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at center,var(--line) 1px,transparent 1.5px) 0 0/14px 14px}
.mouse-arrow{position:absolute;left:50%;top:50%;width:120px;height:3px;background:var(--cpt);transform-origin:0 50%;border-radius:2px;transition:transform .25s,opacity .25s}.mouse-arrow::after{content:'';position:absolute;right:-2px;top:-5px;border:6px solid transparent;border-left:10px solid var(--cpt)}
.mouse-dot{width:10px;height:10px;border-radius:50%;background:var(--ink);position:relative;z-index:1}
.mouse-label{position:absolute;left:10px;bottom:8px;font-size:10px;color:var(--muted);font-variant-numeric:tabular-nums}
.action-facts{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:22px}.action-facts div{border-left:2px solid var(--line);padding-left:12px}.action-facts strong{display:block;font-size:20px;letter-spacing:-.5px;color:var(--ours)}.action-facts span{font-size:11px;color:var(--secondary);line-height:1.5;display:block}

/* Repeat-aware decay + remapping */
.cpt-tricks{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:24px}.cpt-trick{border:1px solid var(--line);border-radius:14px;background:var(--surface);padding:22px}.cpt-trick h3{font-size:16px;margin-bottom:6px}.cpt-trick>p{font-size:12.5px;color:var(--secondary);margin:0 0 16px;line-height:1.7}
.decay-demo{display:flex;gap:4px;align-items:flex-end;height:120px;padding:0 0 26px;position:relative}.decay-cell{flex:1;position:relative;height:100%;display:flex;flex-direction:column;justify-content:flex-end;align-items:center}.decay-cell i{display:block;width:100%;background:var(--cpt);opacity:.55;border-radius:4px 4px 0 0;transition:height .4s}.decay-cell.fresh i{opacity:1}.decay-cell b{position:absolute;bottom:-18px;font-size:11px;color:var(--ink)}.decay-cell small{position:absolute;bottom:-30px;font-size:8.5px;color:var(--muted)}
.decay-caption{font-size:11px;color:var(--muted);margin:22px 0 0}
.remap{display:grid;grid-template-columns:1fr auto 1fr;gap:14px;align-items:center}.remap .keys{display:flex;gap:6px;justify-content:center}.remap .key{min-width:38px}.remap .key.rebound{background:var(--cpt-soft);border-color:var(--cpt);color:var(--cpt)}.remap .arrow{font-size:22px;color:var(--muted)}.remap p{grid-column:1/-1;margin:8px 0 0;font-size:11px;color:var(--muted);text-align:center}

/* Pause ⇄ Run (Table 5) */
.pause-run{border:1px solid var(--line);border-radius:16px;background:var(--surface);padding:26px;margin-top:28px}
.pr-head{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;margin-bottom:14px}.pr-head h3{font-size:16px;margin:0}
.pr-switch{display:inline-flex;align-items:center;gap:12px;border:0;background:transparent;padding:0;font:inherit;color:var(--secondary);font-size:13px;font-weight:600;cursor:pointer}.pr-switch .knob{position:relative;width:64px;height:32px;border-radius:999px;background:#c8ceda;transition:background .25s}.pr-switch .knob::after{content:'';position:absolute;top:3px;left:3px;width:26px;height:26px;border-radius:50%;background:#fff;box-shadow:0 2px 6px #0003;transition:transform .25s}.pr-switch[aria-checked=true] .knob{background:var(--down)}.pr-switch[aria-checked=true] .knob::after{transform:translateX(32px)}
.pr-switch .lab{opacity:.5}.pr-switch[aria-checked=false] .lab.paused,.pr-switch[aria-checked=true] .lab.running{opacity:1;color:var(--ink)}
.pr-summary{font-size:15px;line-height:1.7;color:var(--ink);margin:0 0 20px;min-height:26px;font-weight:500}
.pr-chart{display:flex;flex-direction:column;gap:7px}
.pr-row{display:grid;grid-template-columns:200px 1fr 46px 56px;gap:12px;align-items:center;padding:6px 10px;border-radius:7px;font-size:12.5px;transition:order .3s}.pr-row.ours{background:var(--ours-soft)}.pr-name{color:var(--secondary)}.ours .pr-name{color:var(--ours);font-weight:700}
.pr-track{position:relative;height:18px;background:var(--baseline-soft);border-radius:4px;overflow:hidden}.pr-track i{position:absolute;left:0;top:0;height:100%;background:var(--baseline);border-radius:4px;transition:width .7s cubic-bezier(.2,.8,.2,1)}.ours .pr-track i{background:var(--ours)}
.pr-value{text-align:right;font-variant-numeric:tabular-nums;font-size:14px}.ours .pr-value{color:var(--ours)}.pr-delta{font-size:11px;font-variant-numeric:tabular-nums;font-weight:700}.pr-delta.down{color:var(--down)}.pr-delta.up{color:var(--up)}
.pr-axis{display:flex;justify-content:space-between;margin:12px 0 0 222px;font-size:10px;color:var(--muted);border-top:1px solid var(--line);padding-top:6px}

/* Stage ladder (Table 6) */
.stage-ladder{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:28px}
.ladder-panel{border:1px solid var(--line);border-radius:14px;background:var(--surface);padding:22px 22px 18px}.ladder-panel h3{font-size:17px;margin:0 0 2px}.ladder-sub{font-size:11px;color:var(--muted);margin:0 0 20px}
.ladder-steps{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:14px;height:230px;align-items:end;margin-bottom:40px;border-bottom:1px solid var(--line)}
.ladder-step{position:relative;height:100%;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;padding-top:26px}.ladder-step i{display:block;width:100%;border-radius:6px 6px 0 0;background:var(--base);transition:height .9s cubic-bezier(.2,.8,.2,1)}.ladder-step b{font-size:17px;letter-spacing:-.5px;margin-bottom:6px;font-variant-numeric:tabular-nums}.ladder-step span{position:absolute;bottom:-22px;font-size:12px;font-weight:700}.ladder-step small{position:absolute;bottom:-36px;font-size:9.5px;color:var(--muted);white-space:nowrap}
.ladder-step.stage-1 i{background:var(--cpt)}.ladder-step.stage-2 i{background:var(--sft)}.ladder-step.stage-3 i{background:var(--rl)}.ladder-step.stage-1 b{color:var(--cpt)}.ladder-step.stage-2 b{color:var(--sft)}.ladder-step.stage-3 b{color:var(--rl)}.ladder-step.stage-0 b{color:var(--base)}
.ladder-baseline{position:absolute;left:0;right:0;bottom:calc((100% - 26px) * var(--v,0));border-top:2px dashed var(--down);pointer-events:none}.ladder-baseline span{position:absolute;right:0;top:-18px;font-size:10px;color:var(--down);font-weight:600;background:var(--surface);padding:0 4px}
.ladder-gain{margin:10px 0 0;font-size:12px;font-weight:600;color:var(--secondary)}

/* Milestone timeline (Tables 13/14) */
.ms-timeline{margin-top:18px}.ms-head{display:flex;justify-content:space-between;font-size:12px;color:var(--secondary);margin-bottom:8px}.ms-head strong{color:var(--ink)}
.ms-bar{display:flex;gap:2px;height:34px;border-radius:7px;overflow:hidden}.ms-seg{border:0;padding:0;min-width:3px;background:var(--base);cursor:pointer;transition:filter .15s,transform .15s}.ms-seg:hover,.ms-seg.current{filter:brightness(1.15);transform:scaleY(1.12)}.ms-seg:focus-visible{outline:2px solid var(--ink);outline-offset:-2px}
.ms-seg.nav,.ms-legend .nav i{background:var(--nav-type)}.ms-seg.dlg,.ms-legend .dlg i{background:var(--dlg-type)}.ms-seg.cmb,.ms-legend .cmb i{background:var(--cmb-type)}.ms-seg.ui,.ms-legend .ui i{background:var(--ui-type)}.ms-seg.puz,.ms-legend .puz i{background:var(--puz-type)}
.ms-legend{display:flex;gap:14px;flex-wrap:wrap;margin:10px 0;font-size:11px;color:var(--secondary)}.ms-legend span{display:inline-flex;align-items:center;gap:6px}.ms-legend i{width:10px;height:10px;border-radius:3px}
.ms-detail{display:grid;gap:4px;padding:12px 14px;border-radius:9px;background:var(--alt);border:1px solid var(--line);min-height:70px;font-size:13px}.ms-detail b{font-size:11px;letter-spacing:.6px;text-transform:uppercase;color:var(--ours)}.ms-detail small{font-size:11px;color:var(--muted)}
.quest-card{border:1px solid var(--line);border-radius:14px;background:var(--surface);padding:22px;margin-top:20px}.quest-card h3{font-size:18px;margin-bottom:4px}.quest-card>p{font-size:12.5px;color:var(--secondary);margin:0}

/* Scaling-law explorer */
.sl-explorer{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:22px;margin-top:26px;border:1px solid var(--line);border-radius:14px;background:var(--surface);padding:22px}
.sl-svg{width:100%;height:auto;display:block}.sl-svg .grid{stroke:var(--line);stroke-width:1}.sl-svg .tick{font-size:10px;fill:var(--muted)}.sl-svg .axis{font-size:11px;fill:var(--secondary)}.sl-svg .curve{fill:none;stroke:var(--baseline);stroke-width:1.5;opacity:.6}.sl-svg .curve.active{stroke:var(--cpt);stroke-width:3;opacity:1}.sl-svg .curve-label{font-size:10px;fill:var(--muted)}.sl-svg .curve-label.active{fill:var(--cpt);font-weight:700}.sl-svg .marker{fill:var(--ours);stroke:#fff;stroke-width:2}
.sl-controls{display:grid;gap:16px;align-content:start}.sl-controls label{display:grid;gap:6px;font-size:12px;font-weight:600;color:var(--secondary)}.sl-controls label span{display:flex;justify-content:space-between}.sl-controls output{color:var(--ours);font-weight:700}.sl-controls input[type=range]{width:100%;accent-color:var(--cpt)}.sl-controls select{padding:7px 10px;border:1px solid var(--line);border-radius:7px;background:var(--surface);color:var(--ink)}
.sl-readout{padding:14px;border-radius:10px;background:var(--cpt-soft);border:1px solid #f3d2b3;display:grid;gap:2px}.sl-readout b{font-size:28px;letter-spacing:-1px;color:var(--cpt)}.sl-readout span{font-size:12px;color:var(--ink);font-weight:600}.sl-readout small{font-size:10.5px;color:var(--secondary)}
.sl-formula{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:10.5px;color:var(--muted);margin:0;word-break:break-all}

/* Abstract, BibTeX, resources */
.abstract-box{border:1px solid var(--line);border-radius:14px;background:var(--surface);padding:26px 30px;margin-top:26px}.abstract-box p{font-size:14.5px;line-height:1.85;color:var(--secondary);margin:0}
.bibtex-box{position:relative;margin-top:16px;border:1px solid var(--line);border-radius:12px;background:#0f1420;color:#c9d3ef;padding:18px 20px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;line-height:1.6;overflow:auto}.bibtex-box pre{margin:0}
#copy-bibtex{position:absolute;top:10px;right:10px;border:1px solid #ffffff33;background:#ffffff14;color:#fff;border-radius:999px;padding:6px 12px;font-size:11px;font-weight:600}#copy-bibtex:hover{background:var(--ours)}
.resource-grid{grid-template-columns:repeat(2,1fr)}

/* Table 9 waterfall */
.waterfall{display:grid;gap:8px;margin-top:6px}.wf-row{display:grid;grid-template-columns:210px 1fr 70px;gap:12px;align-items:center;font-size:12px}.wf-row span{color:var(--secondary)}.wf-track{position:relative;height:16px}.wf-track i{position:absolute;top:0;height:100%;border-radius:3px;background:var(--baseline)}.wf-track i.cut{background:#1c9a8a;opacity:.85}.wf-row b{text-align:right;font-variant-numeric:tabular-nums}.wf-row.final span,.wf-row.final b{color:var(--ours);font-weight:700}.wf-row.final .wf-track i{background:var(--ours)}

@media(max-width:1000px){.pipeline{grid-template-columns:repeat(3,1fr)}.pipeline a:nth-child(4){border-left:0}.pipeline a:nth-child(n+4){border-top:1px solid var(--line)}.mechanic-rest{grid-template-columns:repeat(2,1fr)}.resource-grid{grid-template-columns:repeat(2,1fr)}.action-facts{grid-template-columns:repeat(2,1fr)}.nav nav .nav-chapter{display:none}}
@media(max-width:800px){.pipeline{grid-template-columns:1fr 1fr}.pipeline a{border-left:0!important;border-top:1px solid var(--line)}.pipeline a:nth-child(-n+2){border-top:0}.pipeline a:nth-child(even){border-left:1px solid var(--line)!important}.mechanic-row{grid-template-columns:1fr}.action-demo,.sl-explorer,.cpt-tricks,.stage-ladder{grid-template-columns:1fr}.pr-row{grid-template-columns:120px 1fr 40px 44px;font-size:11px}.pr-axis{margin-left:132px}.wf-row{grid-template-columns:130px 1fr 60px}.hero-lede{font-size:13.5px}}
@media(max-width:520px){.pipeline{grid-template-columns:1fr}.pipeline a{border-left:0!important}.mechanic-rest,.resource-grid{grid-template-columns:1fr}.pr-row{grid-template-columns:1fr 40px 40px}.pr-track{grid-column:1/-1;grid-row:2}.pr-axis{margin-left:0}.ladder-steps{height:190px}.ladder-step small{display:none}.action-facts{grid-template-columns:1fr 1fr}.packet{grid-template-columns:repeat(3,1fr)}.packet .packet-mouse{grid-column:1/-1}.packet-scale{margin-left:0}}

/* Hero: lighter background wall, tighter vertical rhythm */
.game-wall{filter:blur(2px) saturate(.8) brightness(.7)}.game-wall img{will-change:auto}
.hero .hero-content{padding-bottom:36px}.hero .hero-buttons{margin-top:22px}
.stats>a .versus{display:block}
/* details > summary count badge alignment inside Evidence */
.figure-details>.gallery-controls{padding:0 20px}.figure-details>.comparison-panel{margin:0 20px 20px;border:0;border-top:1px solid var(--line);border-radius:0}.figure-details>.comparison-toolbar{padding:16px 20px 0}.figure-details>.research-chart{padding:0 20px 20px}

/* Main-story chapter selector and reserved video cards. */
#main-story{padding-top:48px;scroll-margin-top:78px}
.story-tabs.segmented{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));width:100%;gap:6px;padding:6px;margin:30px 0 24px;border:1px solid var(--line);border-radius:14px;background:var(--surface-2)}
.story-tabs.segmented button{display:flex;flex-direction:column;align-items:flex-start;gap:7px;padding:17px 22px;border-radius:9px;min-width:0;color:var(--secondary);text-align:left}
.story-tabs button small{font-size:10px;letter-spacing:1.4px;text-transform:uppercase}
.story-tabs button span{font-size:18px;font-weight:700;letter-spacing:.3px}
.story-tabs.segmented button[aria-pressed=true]{color:var(--ours);background:var(--surface);box-shadow:0 2px 8px #14161a0a}
.story-gallery-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:0 0 18px}
.story-gallery-heading h3{margin:0;font-size:20px}
.story-gallery-heading .gallery-count{margin:0}
.video-grid.story-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.story-grid .video-meta h3{display:none}
.story-placeholder{min-width:0;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--surface)}
.story-placeholder-screen{aspect-ratio:16/9;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:13px;background:linear-gradient(145deg,var(--surface-2),var(--ours-soft));border-bottom:1px solid var(--line)}
.story-placeholder-icon{display:block;width:42px;height:31px;position:relative;border:1.5px solid var(--muted);border-radius:6px;opacity:.6}
.story-placeholder-icon::after{content:'';position:absolute;left:16px;top:9px;border-left:9px solid var(--muted);border-top:5px solid transparent;border-bottom:5px solid transparent}
.story-placeholder-state{font-size:12px;color:var(--secondary);letter-spacing:1px}
.story-placeholder-meta{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:17px 18px}
.story-placeholder-meta h4{font-size:14px;margin:0;color:var(--ink)}
.story-placeholder-meta>span{font-size:11px;color:var(--muted)}
@media(max-width:900px){.video-grid.story-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:520px){.video-grid.story-grid{grid-template-columns:1fr}.story-tabs.segmented{gap:3px;padding:4px}.story-tabs.segmented button{padding:12px 8px;gap:5px}.story-tabs button small{font-size:8px;letter-spacing:.6px}.story-tabs button span{font-size:15px}.story-gallery-heading{align-items:flex-start;flex-direction:column;gap:8px}}