/* ============================================================
   IdeaAnchor project page
   warm paper · oxblood accent · serif prose · one module per row
   ============================================================ */
:root {
  --paper: #F6F3EC;
  --paper-2: #EFEBE1;
  --paper-3: #E8E3D6;
  --card: #FBF9F4;
  --ink: #15141A;
  --ink-2: #2A2830;
  --ink-3: #5E5B66;
  --ink-4: #6A6674;
  --rule: #D9D3C3;
  --rule-2: #E6E1D2;
  --accent: #7A1A1A;
  --link-line: rgba(122, 26, 26, 0.38);

  /* series: paper hues, re-stepped to pass CVD checks */
  --c-base: #A3A9B2;
  --c-ssd: #C24A5C;
  --c-sft: #3366AA;
  --c-rl: #0A8F84;
  --c-anchor: #B8650A;
  --c-anchor-soft: rgba(184, 101, 10, 0.10);

  --font-serif: 'Newsreader', 'Iowan Old Style', Georgia, serif;
  --font-sans: 'Inter Tight', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, Menlo, monospace;
  --wide: 960px;
  --text: 720px;
  --gutter: clamp(18px, 4vw, 48px);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; overflow-x: clip; }
body { background: var(--paper); color: var(--ink); font-family: var(--font-sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
button { font: inherit; }
::selection { background: rgba(184, 101, 10, 0.22); }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(8px); -webkit-backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid transparent; transition: border-color 0.2s;
}
.topbar.scrolled { border-bottom-color: var(--rule); }
.topbar .in { max-width: calc(var(--wide) + 2 * var(--gutter)); margin: 0 auto; padding: 12px var(--gutter); display: flex; align-items: center; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-mono); font-size: 13px; text-decoration: none; color: var(--ink); }
.brand svg { width: 20px; height: 20px; }
.topbar .sp { flex: 1; }
.topbar .lnk { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--ink-3); text-decoration: none; }
.topbar .lnk:hover { color: var(--accent); }
.progress { position: absolute; left: 0; bottom: -1px; height: 2px; background: var(--c-anchor); width: 0; }

/* ---------- collapsible contents ---------- */
.toc { position: fixed; left: 0; top: 50%; transform: translateY(-50%); z-index: 25; padding: 14px 0 14px 14px; }
.toc-rail { display: flex; flex-direction: column; gap: 11px; padding: 10px 12px 10px 4px; }
.toc-rail i { display: block; width: 14px; height: 2px; border-radius: 1px; background: var(--rule); transition: width 0.2s, background 0.2s; }
.toc-rail i.on { width: 24px; background: var(--c-anchor); }
.toc-panel {
  position: absolute; left: 10px; top: 50%; transform: translate(-8px, -50%);
  width: 210px; padding: 14px 16px 12px; background: var(--card); border: 1px solid var(--rule); border-radius: 6px;
  box-shadow: 0 16px 40px -22px rgba(0, 0, 0, 0.4); opacity: 0; pointer-events: none; transition: opacity 0.18s, transform 0.2s;
}
.toc:hover .toc-panel, .toc:focus-within .toc-panel { opacity: 1; transform: translate(0, -50%); pointer-events: auto; }
.toc-panel h3 { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-4); font-weight: 500; margin: 0 0 8px; }
.toc-panel ol { list-style: none; margin: 0; padding: 0; }
.toc-panel a { display: block; padding: 4px 0 4px 10px; border-left: 2px solid transparent; font-size: 13.5px; color: var(--ink-3); text-decoration: none; }
.toc-panel a:hover { color: var(--ink); }
.toc-panel a.active { color: var(--ink); border-left-color: var(--c-anchor); }

/* ---------- page ---------- */
.page { max-width: calc(var(--wide) + 2 * var(--gutter)); margin: 0 auto; padding: 0 var(--gutter) 72px; }
.prose { max-width: var(--text); margin-left: auto; margin-right: auto; }
section { scroll-margin-top: 64px; }

/* header */
.head { text-align: center; padding: 56px 0 8px; }
.head h1 { font-family: var(--font-serif); font-weight: 400; font-size: clamp(34px, 4.8vw, 56px); line-height: 1.08; letter-spacing: -0.022em; margin: 0 auto; max-width: 900px; }
.head h1 .name { font-family: var(--font-mono); font-weight: 500; font-size: 0.8em; letter-spacing: -0.04em; color: var(--c-anchor); }
.authors { margin: 28px 0 0; font-size: 16px; line-height: 1.9; }
.authors .a { white-space: nowrap; margin: 0 10px; }
.authors sup { font-family: var(--font-mono); font-size: 10px; margin-left: 2px; font-weight: 600; }
.affils { font-size: 13.5px; color: var(--ink-3); margin-top: 2px; line-height: 1.8; }
.affils span { margin: 0 9px; white-space: nowrap; }
.affils sup { font-family: var(--font-mono); font-size: 9.5px; font-weight: 600; margin-right: 3px; }
.sup-c { color: #800000; } .sup-y { color: #00356B; } .sup-i { color: #E0540A; } .sup-t { color: #017EC7; }
.logos { display: flex; align-items: center; justify-content: center; gap: 28px; margin: 22px 0 0; flex-wrap: wrap; }
.logos img { width: auto; }
.btns { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin: 26px 0 0; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; text-decoration: none;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase;
  padding: 9px 15px; border: 1px solid var(--ink); border-radius: 20px; color: var(--ink); transition: background 0.15s, color 0.15s;
}
.btn img, .btn svg { width: 15px; height: 15px; }
.btn:hover { background: var(--ink); color: var(--paper); }
.btn:hover img { filter: invert(1); }
.btn.hf:hover img { filter: none; }
.btn.primary { background: var(--ink); color: var(--paper); }
.btn.primary:hover { background: var(--accent); border-color: var(--accent); }

/* teaser */
.hero { margin: 40px 0 0; padding: 20px 0 0; border-top: 1px solid var(--rule); }
.hero svg { width: 100%; height: auto; display: block; overflow: visible; font-family: var(--font-sans); }
.hero .steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-top: 14px; }
.hero .steps button {
  text-align: left; background: none; border: 0; border-top: 2px solid var(--rule); cursor: pointer; padding: 9px 0 0; position: relative;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; color: var(--ink-4);
}
.hero .steps button .bar { position: absolute; left: 0; top: -2px; height: 2px; width: 0; background: var(--c-anchor); }
.hero .steps button b { display: block; font-family: var(--font-sans); font-size: 14px; font-weight: 500; letter-spacing: 0; color: var(--ink-3); margin-top: 2px; }
.hero .steps button.on b { color: var(--ink); }
.hero .steps button .d { display: block; font-family: var(--font-sans); font-size: 12.5px; letter-spacing: 0; color: var(--ink-4); margin-top: 2px; line-height: 1.4; }

/* stats */
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin: 34px 0 0; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--rule); }
.stat { padding: 16px 16px 14px; text-align: center; }
.stat + .stat { border-left: 1px solid var(--rule-2); }
.stat .v { font-family: var(--font-serif); font-size: clamp(28px, 3.2vw, 40px); line-height: 1; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.stat .v small { font-size: 0.45em; color: var(--ink-3); margin-left: 3px; }
.stat .l { font-size: 13px; line-height: 1.4; color: var(--ink-3); margin-top: 8px; }

/* prose */
.prose h2 {
  font-family: var(--font-serif); font-weight: 500; font-size: clamp(25px, 2.5vw, 31px); letter-spacing: -0.015em; line-height: 1.2;
  margin: 64px 0 14px; display: flex; align-items: baseline; gap: 14px;
}
.prose h2 .n { font-family: var(--font-mono); font-size: 12px; font-weight: 500; color: var(--c-anchor); letter-spacing: 0.04em; }
.prose p { font-family: var(--font-serif); font-size: 18.5px; line-height: 1.7; color: var(--ink-2); margin: 0 0 18px; }
#abstract p { font-size: 18px; text-align: justify; hyphens: auto; }
.prose p.note { font-family: var(--font-sans); font-size: 15.5px; line-height: 1.55; color: var(--ink-2); padding-left: 14px; border-left: 3px solid var(--c-anchor); margin: -6px auto 8px; }
.prose p.ack { font-size: 15px; color: var(--ink-3); }
.prose a:not(.btn) { text-decoration: none; border-bottom: 1px solid var(--link-line); }
.prose strong { font-weight: 600; color: var(--ink); }
code { font-family: var(--font-mono); font-size: 0.8em; background: var(--paper-2); border: 1px solid var(--rule-2); border-radius: 3px; padding: 1px 5px; }
.math { font-size: 19px; text-align: center; margin: 4px 0 8px; overflow-x: auto; }
.hl { background: linear-gradient(transparent 58%, rgba(184, 101, 10, 0.24) 58%); }
.tag { font-family: var(--font-mono); font-size: 10.5px; padding: 1px 6px; border-radius: 2px; color: #fff; white-space: nowrap; vertical-align: 1px; }

/* ---------- module card ---------- */
figure.viz {
  position: relative; margin: 26px 0 30px; padding: 22px 28px 16px;
  background: var(--card); border: 1px solid var(--rule); border-radius: 8px;
}
.viz .vh { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.viz h4 { font-family: var(--font-sans); font-size: 17px; font-weight: 600; margin: 0; color: var(--ink); }
.viz .hint { font-family: var(--font-mono); font-size: 11px; color: var(--ink-4); letter-spacing: 0.02em; }
.viz .vh .tgl, .viz .vh .seg-ctl { margin-left: auto; }
.viz .ctl { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; margin: 0 0 14px; }
.viz .ctl .lab { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-4); margin-right: -6px; }
.viz svg { width: 100%; height: auto; display: block; overflow: visible; font-family: var(--font-sans); }
.viz figcaption { font-family: var(--font-mono); font-size: 11.5px; line-height: 1.6; color: var(--ink-3); margin-top: 16px; padding-top: 10px; border-top: 1px solid var(--rule-2); }
.viz figcaption b { color: var(--ink-2); font-weight: 500; }
.viz .tbl { display: none; }
.viz.show-table .tbl { display: block; }
.viz.show-table .plot { display: none; }
.viz table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.viz th { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.07em; text-transform: uppercase; font-weight: 500; color: var(--ink-3); text-align: left; padding: 8px; border-bottom: 1px solid var(--ink); }
.viz td { padding: 6px 8px; border-bottom: 1px solid var(--rule-2); color: var(--ink-2); font-variant-numeric: tabular-nums; }
.viz td.n, .viz th.n { text-align: right; }

/* controls */
.seg-ctl { display: inline-flex; border: 1px solid var(--rule); border-radius: 3px; overflow: hidden; background: var(--paper); }
.seg-ctl button { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.05em; padding: 6px 11px; background: transparent; color: var(--ink-3); border: 0; cursor: pointer; transition: background 0.15s, color 0.15s; }
.seg-ctl button + button { border-left: 1px solid var(--rule); }
.seg-ctl button:hover { color: var(--ink); }
.seg-ctl button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.chip {
  display: inline-flex; align-items: center; gap: 7px; cursor: pointer; font-size: 13px; color: var(--ink-2);
  padding: 5px 11px; border: 1px solid var(--rule); border-radius: 20px; background: var(--paper); transition: opacity 0.15s, border-color 0.15s; user-select: none;
}
.chip i { width: 10px; height: 10px; border-radius: 50%; background: var(--c); flex: none; }
.chip svg { width: 12px !important; height: 12px !important; flex: none; overflow: visible; }
.chip:hover { border-color: var(--ink-3); }
.chip[aria-pressed="false"] { opacity: 0.4; }
.tgl { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); background: var(--paper); border: 1px solid var(--rule); border-radius: 3px; padding: 5px 10px; cursor: pointer; }
.tgl:hover { color: var(--accent); border-color: var(--accent); }
.switch { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font-size: 13px; color: var(--ink-2); user-select: none; }
.switch input { display: none; }
.switch .tr { width: 30px; height: 17px; border-radius: 10px; background: var(--rule); position: relative; transition: background 0.2s; flex: none; }
.switch .tr::after { content: ""; position: absolute; left: 2px; top: 2px; width: 13px; height: 13px; border-radius: 50%; background: #fff; transition: transform 0.2s; box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2); }
.switch input:checked + .tr { background: var(--ink); }
.switch input:checked + .tr::after { transform: translateX(13px); }
.switch.big { font-size: 14.5px; font-weight: 500; }
.legend-inline { display: inline-flex; gap: 14px; font-size: 13px; color: var(--ink-2); align-items: center; }
.legend-inline span { display: inline-flex; gap: 6px; align-items: center; }
.legend-inline i { width: 10px; height: 10px; border-radius: 2px; }

/* tooltip */
.tip {
  position: absolute; pointer-events: none; z-index: 5; background: #fff; color: var(--ink); border: 1px solid var(--rule); border-radius: 4px;
  padding: 8px 11px; font-size: 13px; line-height: 1.45; box-shadow: 0 10px 28px -14px rgba(0, 0, 0, 0.4); min-width: 130px;
  opacity: 0; transform: translateY(4px); transition: opacity 0.12s, transform 0.12s;
}
.tip.on { opacity: 1; transform: none; }
.tip .th { font-weight: 600; margin-bottom: 4px; }
.tip .tr { display: flex; align-items: center; gap: 8px; font-variant-numeric: tabular-nums; }
.tip .tr b { font-weight: 600; min-width: 40px; }
.tip .tr span { color: var(--ink-3); }
.tip .tr i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; }

/* entrance */
.anim-fade { opacity: 0; transition: opacity 0.4s ease var(--d, 0ms); }
.in .anim-fade { opacity: 1; }
.reveal { opacity: 0; transform: translateY(12px); transition: opacity 0.6s ease, transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1); }
.reveal.in { opacity: 1; transform: none; }
@keyframes swapIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.fade-swap { animation: swapIn 0.35s ease; }

/* ---------- panels shared ---------- */
.anc-panel { background: var(--paper); border: 1px solid var(--rule); border-radius: 5px; padding: 16px 18px; font-size: 14.5px; line-height: 1.55; color: var(--ink-2); }
.anc-panel .ey { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-4); margin-bottom: 8px; }
.anc-panel h5 { font-family: var(--font-serif); font-size: 19px; font-weight: 500; line-height: 1.3; margin: 0 0 10px; color: var(--ink); }
.learn { border-left: 2px solid var(--c-anchor); padding-left: 12px; margin-top: 10px; }
.learn b { display: block; font-family: var(--font-mono); font-size: 10.5px; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--c-anchor); margin-bottom: 2px; }
.role { display: inline-block; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.04em; padding: 2px 8px; border-radius: 2px; color: #fff; background: var(--rc); }
.crit { list-style: none; padding: 0; margin: 0; }
.crit li { display: grid; grid-template-columns: 24px minmax(0, 1fr); gap: 8px; padding: 8px 0; border-bottom: 1px dashed var(--rule); align-items: start; }
.crit li:last-child { border-bottom: 0; }
.crit .bx { width: 16px; height: 16px; border: 1.5px solid var(--ink-3); border-radius: 3px; margin-top: 2px; position: relative; display: inline-block; transition: background 0.2s, border-color 0.2s; }
.crit li.ok > .bx, .crit .bx.on { background: var(--c-rl); border-color: var(--c-rl); animation: tick 0.35s cubic-bezier(0.2, 0.7, 0.2, 1.6); }
.crit li.ok > .bx::after, .crit .bx.on::after { content: ""; position: absolute; left: 4px; top: 0; width: 5px; height: 9px; border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg); }
@keyframes tick { from { transform: scale(0.5); } to { transform: none; } }
.crit .cat { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-4); display: block; }
.crit .more { color: var(--ink-4); font-style: italic; }

/* anchor explorer */
.anc-tabs { display: flex; gap: 22px; border-bottom: 1px solid var(--rule); margin-bottom: 18px; }
.anc-tabs button { background: none; border: 0; cursor: pointer; padding: 8px 0 10px; font-size: 14.5px; color: var(--ink-4); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.anc-tabs button .k { font-family: var(--font-mono); font-size: 11px; margin-right: 6px; }
.anc-tabs button.on { color: var(--ink); border-bottom-color: var(--c-anchor); }
.anc-body { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 28px; align-items: start; }
.anc-body .anc-panel { min-height: 300px; }
#anc-svg .a-box { transition: stroke 0.2s; }
#anc-svg .a-paper:hover .a-box { stroke: var(--ink-3); }
#anc-svg .a-paper:focus { outline: none; }
#anc-svg .a-paper:focus-visible .a-box { stroke: var(--accent); stroke-width: 2; }
#anc-svg .a-edge { opacity: 0; transition: opacity 0.45s; }
#anc-svg.a-rel .a-edge, #anc-svg.a-crit .a-edge { opacity: 1; }
#anc-svg .a-gapnode { opacity: 0.28; transition: opacity 0.45s; }
#anc-svg.a-rel .a-gapnode, #anc-svg.a-crit .a-gapnode { opacity: 1; }
#anc-svg .a-idea { opacity: 0.3; transition: opacity 0.45s; }
#anc-svg.a-crit .a-idea { opacity: 1; }
#anc-svg .a-chkfill { opacity: 0; transform: scale(0.3); transform-box: fill-box; transform-origin: center; transition: opacity 0.25s ease var(--d, 0ms), transform 0.4s cubic-bezier(0.2, 0.7, 0.2, 1.6) var(--d, 0ms); }
#anc-svg.a-crit.play .a-chkfill { opacity: 1; transform: none; }
#anc-svg .a-role { transition: opacity 0.4s; }
#anc-svg.a-rel .a-role, #anc-svg.a-crit .a-role { opacity: 0.5; }

/* pipeline */
.pipe { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.pipe .st { position: relative; padding-top: 14px; border-top: 2px solid var(--rule); }
.pipe .st .k { font-family: var(--font-mono); font-size: 11px; color: var(--c-anchor); letter-spacing: 0.06em; }
.pipe .st b { display: block; font-size: 16px; font-weight: 600; margin: 4px 0 6px; }
.pipe .st > span:last-child { display: block; font-size: 14px; line-height: 1.5; color: var(--ink-3); }
.pipe .st .prog { position: absolute; left: 0; right: 0; top: -2px; height: 2px; background: var(--c-anchor); transform: scaleX(0); transform-origin: left; }
.in .pipe .st .prog { transform: none; transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1) var(--d, 0ms); }

/* paradigms */
.para-tabs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-bottom: 8px; }
.para-tabs button {
  text-align: left; cursor: pointer; background: var(--paper); border: 1px solid var(--rule); border-radius: 5px; padding: 11px 14px;
  color: var(--ink-2); position: relative; overflow: hidden; transition: border-color 0.15s, box-shadow 0.2s;
}
.para-tabs button::after { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--c); transform: scaleY(0); transform-origin: top; transition: transform 0.25s; }
.para-tabs button:hover { border-color: var(--ink-3); }
.para-tabs button.on { border-color: var(--c); box-shadow: 0 8px 22px -18px var(--c); }
.para-tabs button.on::after { transform: none; }
.para-tabs .k { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em; color: var(--c); }
.para-tabs b { display: block; font-size: 15px; font-weight: 600; margin-top: 2px; color: var(--ink); }
#para-svg { max-width: 780px; margin: 0 auto; }
#para-svg .p-scene { animation: swapIn 0.45s ease; }
.para-desc { text-align: center; font-size: 14.5px; color: var(--ink-2); line-height: 1.6; max-width: 700px; margin: 6px auto 0; }
.para-desc .eq { display: block; font-family: var(--font-serif); font-size: 17px; color: var(--ink); margin-top: 6px; }
.flow-dot { filter: drop-shadow(0 0 3px rgba(184, 101, 10, 0.5)); }

/* reward sandbox */
.rw { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: 32px; align-items: start; }
.rw-score { display: flex; align-items: baseline; gap: 10px; margin-bottom: 6px; }
.rw-score .big { font-family: var(--font-serif); font-size: 44px; line-height: 1; font-variant-numeric: tabular-nums; }
.rw-score .eqn { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); }
#rw-crit li { padding: 6px 4px; font-size: 13.5px; line-height: 1.45; cursor: pointer; border-radius: 3px; }
#rw-crit li:hover { background: var(--paper-2); }
#rw-crit li.dim { opacity: 0.45; }
#rw-crit .minis { display: inline-flex; gap: 6px; margin-right: 8px; vertical-align: -3px; }
#rw-crit .minis .bx { cursor: pointer; margin-top: 0; }
.rw-sw { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 12px; }

/* algorithm */
.algo { font-family: var(--font-mono); font-size: 13px; line-height: 2; border-top: 1.5px solid var(--ink); border-bottom: 1.5px solid var(--ink); padding: 6px 0; counter-reset: ln; }
.algo div { counter-increment: ln; padding: 0 8px; border-radius: 3px; transition: background 0.2s, color 0.2s, opacity 0.2s; color: var(--ink-3); white-space: pre; cursor: pointer; }
.algo div::before { content: counter(ln); display: inline-block; width: 22px; color: var(--ink-4); font-size: 11px; }
.algo div.on { background: var(--c-anchor-soft); color: var(--ink); }
.algo div.skip { opacity: 0.3; }
.algo .kw { color: var(--accent); font-weight: 600; }
#algo-panel { min-height: 200px; }
#algo-panel table { margin-top: 10px; font-size: 13px; }
#algo-panel th { font-size: 10px; padding: 5px 6px; }
#algo-panel td { padding: 4px 6px; }

/* decomposition */
.dec { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 28px; align-items: start; }
.dec-ctl { display: flex; flex-direction: column; gap: 16px; padding-top: 6px; }
.dec-ctl .metric { border-top: 1px solid var(--rule); padding-top: 14px; font-size: 13px; color: var(--ink-3); line-height: 1.5; }
.dec-ctl .metric .u { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em; color: var(--ink-4); }
.dec-ctl .metric b { display: block; font-family: var(--font-serif); font-size: 40px; font-weight: 400; color: var(--ink); line-height: 1.1; font-variant-numeric: tabular-nums; }
.prop { background: var(--paper); border: 1px solid var(--rule); border-radius: 5px; padding: 6px 18px; font-size: 14.5px; line-height: 1.55; color: var(--ink-2); }
.prop .row { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--rule-2); align-items: center; }
.prop .row:last-child { border-bottom: 0; }
.prop .row > b { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-4); font-weight: 500; }
.prop .txt.swap { animation: swapIn 0.4s ease; }
.meter { height: 8px; background: var(--paper-3); border-radius: 4px; overflow: hidden; }
.meter i { display: block; height: 100%; width: 0; border-radius: 4px; background: var(--c); transition: width 0.6s cubic-bezier(0.2, 0.7, 0.2, 1); }
.meter-lab { font-family: var(--font-mono); font-size: 10.5px; color: var(--ink-4); margin-top: 5px; }

/* case study */
.case-papers { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.case-papers .pp { border: 1px solid var(--rule); border-radius: 20px; padding: 5px 12px; font-size: 13px; color: var(--ink-2); background: var(--paper); transition: border-color 0.2s, background 0.2s, color 0.2s; }
.case-papers .pp small { font-family: var(--font-mono); font-size: 10.5px; color: var(--ink-4); margin-left: 6px; }
.case-papers .pp.hit { border-color: var(--c-sft); background: var(--c-sft); color: #fff; }
.case-papers .pp.hit small { color: rgba(255, 255, 255, 0.8); }
.case-out { background: var(--paper); border: 1px solid var(--rule); border-radius: 5px; }
.case-out .bd { padding: 16px 20px; font-family: var(--font-serif); font-size: 16.5px; line-height: 1.62; color: var(--ink-2); }
.case-out .bd h6 { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-4); margin: 14px 0 6px; font-weight: 500; }
.case-out .bd h6:first-child { margin-top: 0; }
.case-out .bd p { margin: 0 0 10px; }
.case-out .bd .think { font-style: italic; color: var(--ink-3); border-left: 2px solid var(--rule); padding-left: 12px; margin-bottom: 6px; }
.case-out .bd ul { margin: 4px 0 10px; padding-left: 20px; }
.cite-h { font-family: var(--font-mono); font-size: 0.8em; font-style: normal; color: var(--c-sft); background: rgba(51, 102, 170, 0.09); border-radius: 3px; padding: 0 4px; cursor: help; }
.cite-b { border-bottom: 1px dotted var(--ink-4); cursor: help; }
.case-analysis { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 16px; }
.case-analysis div { border-top: 2px solid var(--c-rl); padding-top: 8px; font-size: 13.5px; line-height: 1.5; color: var(--ink-3); }
.case-analysis b { display: block; font-size: 14px; color: var(--ink); margin-bottom: 2px; }

/* benchmark squares */
.b-cell { opacity: 0; transition: opacity 0.35s ease var(--d, 0ms), fill 0.35s ease; }
.in .b-cell { opacity: 1; }
.b-cell:hover { stroke: var(--ink); stroke-width: 1.5; }

/* hero states (svg.st0 … st3 are cumulative) */
#hero-svg .h-card { opacity: 0; transform: translateX(-10px); transition: opacity 0.5s ease var(--d, 0ms), transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1) var(--d, 0ms); }
#hero-svg.st0 .h-card { opacity: 1; transform: none; }
#hero-svg .h-rs, #hero-svg .h-rt { opacity: 0; transition: opacity 0.4s ease var(--d, 0ms); }
#hero-svg.st1 .h-rs, #hero-svg.st1 .h-rt { opacity: 1; }
#hero-svg .h-arc { fill: none; stroke: #5E5B66; stroke-width: 1.3; stroke-dasharray: 1; stroke-dashoffset: 1; transition: stroke-dashoffset 0.9s cubic-bezier(0.4, 0, 0.2, 1) var(--d, 0ms), opacity 0.4s; }
#hero-svg.st2 .h-arc { stroke-dashoffset: 0; }
#hero-svg.st3 .h-arc { opacity: 0.25; }
#hero-svg .h-gap { opacity: 0; transform: scale(0.6); transform-box: fill-box; transform-origin: center; transition: opacity 0.4s ease 0.9s, transform 0.5s cubic-bezier(0.2, 0.7, 0.2, 1.4) 0.9s; }
#hero-svg.st2 .h-gap { opacity: 1; transform: none; }
#hero-svg.st2 .h-gapc { animation: pulse 1.8s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
@keyframes pulse { 50% { transform: scale(1.12); } }
#hero-svg .h-flow { fill: none; stroke: #B8650A; stroke-width: 1.4; stroke-dasharray: 3 6; opacity: 0; transition: opacity 0.4s ease var(--d, 0ms); }
#hero-svg.st3 .h-flow { opacity: 0.75; animation: dash 0.9s linear infinite; }
#hero-svg .h-out { fill: none; stroke: #B8650A; stroke-width: 2; stroke-dasharray: 5 5; opacity: 0; transition: opacity 0.4s ease 0.5s; }
#hero-svg.st3 .h-out { opacity: 1; animation: dash 0.7s linear infinite; }
@keyframes dash { to { stroke-dashoffset: -18; } }
#hero-svg .h-pill { opacity: 0; transform: translateY(6px); transition: opacity 0.4s ease 0.3s, transform 0.5s cubic-bezier(0.2, 0.7, 0.2, 1) 0.3s; }
#hero-svg.st1 .h-p1, #hero-svg.st2 .h-p2, #hero-svg.st3 .h-p3 { opacity: 1; transform: none; }
#hero-svg .h-core { transition: stroke 0.4s, stroke-width 0.4s; }
#hero-svg.st3 .h-core { stroke: #B8650A; stroke-width: 2.4; }
#hero-svg.st3 .h-orbit { animation: spin 14s linear infinite; transform-box: fill-box; transform-origin: center; }
@keyframes spin { to { transform: rotate(360deg); } }
#hero-svg .h-idea { opacity: 0.35; transition: opacity 0.5s ease 0.4s; }
#hero-svg.st3 .h-idea { opacity: 1; }
#hero-svg .h-ideatop { transform: scaleX(0); transform-box: fill-box; transform-origin: left; transition: transform 0.8s ease 0.4s; }
#hero-svg.st3 .h-ideatop { transform: none; }
#hero-svg .h-fill { transform: scaleX(0); transform-box: fill-box; transform-origin: left; transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1) var(--d, 0ms); }
#hero-svg.st3 .h-fill { transform: none; }
#hero-svg .h-chk { opacity: 0; transform: scale(0.5); transform-box: fill-box; transform-origin: left center; transition: opacity 0.3s ease var(--d, 0ms), transform 0.45s cubic-bezier(0.2, 0.7, 0.2, 1.5) var(--d, 0ms); }
#hero-svg.st3 .h-chk { opacity: 1; transform: none; }

/* citation */
pre.bib { position: relative; background: var(--card); border: 1px solid var(--rule); border-radius: 6px; padding: 16px 18px; font-family: var(--font-mono); font-size: 12.5px; line-height: 1.65; color: var(--ink-2); overflow-x: auto; margin: 0 0 18px; }
.copy { position: absolute; right: 10px; top: 10px; }
footer.foot { max-width: calc(var(--wide) + 2 * var(--gutter)); margin: 0 auto; padding: 22px var(--gutter) 48px; border-top: 1px solid var(--rule); font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.05em; color: var(--ink-4); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
footer.foot a { color: inherit; text-decoration: none; }

/* ---------- responsive ---------- */
@media (max-width: 1100px) { .toc { display: none; } }
@media (max-width: 820px) {
  figure.viz { padding: 18px 16px 14px; }
  .anc-body, .rw, .dec { grid-template-columns: minmax(0, 1fr); }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat:nth-child(3) { border-left: 0; }
  .case-analysis, .pipe, .para-tabs { grid-template-columns: minmax(0, 1fr); }
  .hero .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .algo div { white-space: pre-wrap; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .anim-fade, .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
}