/* THE SITE wears the app's palette (ui/src/index.css): charcoal and gold, every
 * neutral a step on one charcoal ramp, gold the only colour that acts. Dark
 * unless the system asks for light, as the app does. Words wear their own
 * hashed colour (ui/src/lib/palette.ts, served as /palette.js). */

@font-face {
  font-family: 'Outfit';
  src: url('/assets/outfit.woff2') format('woff2');
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --page: 19 21 25;
  --panel: 27 30 35;
  --panel-2: 36 40 44;
  --line: 54 59 66;
  --line-soft: 39 43 49;
  --ink: 250 253 255;
  --ink-2: 179 187 196;
  --ink-3: 129 139 149;
  --ink-4: 93 102 111;
  --good: 52 211 153;
  --bad: 248 113 113;
  --gold: 240 176 20;
  --warn: 251 146 60;
  --on-gold: 26 20 4;
  --glow: 240 176 20;
  color-scheme: dark;

  --display: 'Outfit', ui-sans-serif, system-ui, sans-serif;
  --body: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', monospace;
  --ease: cubic-bezier(0.33, 1, 0.68, 1);
  --short: 200ms;
  --page-t: 320ms;
  --hop: 600ms;
  --radius: 18px;
  --gutter: 20px;
}

@media (prefers-color-scheme: light) {
  :root {
    --page: 247 247 246;
    --panel: 255 255 255;
    --panel-2: 240 241 242;
    --line: 211 215 220;
    --line-soft: 228 231 234;
    --ink: 36 40 44;
    --ink-2: 84 92 101;
    --ink-3: 121 130 140;
    --ink-4: 166 174 182;
    --good: 4 120 87;
    --bad: 190 18 60;
    --gold: 194 140 12;
    --warn: 180 83 9;
    --on-gold: 32 26 6;
    --glow: 217 158 11;
    color-scheme: light;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: rgb(var(--page));
  color: rgb(var(--ink));
  font: 400 18px/1.6 var(--body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--display); margin: 0; letter-spacing: -0.02em; }
p { margin: 0; }
em { font-style: normal; color: rgb(var(--gold)); }
code { font-family: var(--mono); font-size: 0.9em; }
.muted { color: rgb(var(--ink-3)); }
.small { font-size: 0.85rem; }

.wrap { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 var(--gutter); }
.wrap.narrow { max-width: 800px; }

/* ---------------------------------------------------------------- nav */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: rgb(var(--page) / 0.78);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid rgb(var(--line-soft) / 0.7);
}
.nav-row { display: flex; align-items: center; gap: 28px; height: 64px; }
.brand img { height: 34px; width: auto; }
.nav-links { display: none; gap: 26px; margin-left: auto; font-size: 0.92rem; }
.nav-links a { text-decoration: none; color: rgb(var(--ink-2)); transition: color var(--short) var(--ease); }
.nav-links a:hover { color: rgb(var(--ink)); }
.nav .btn { margin-left: auto; }
@media (min-width: 860px) {
  .nav-links { display: flex; }
  .nav .btn { margin-left: 0; }
}

/* ---------------------------------------------------------------- buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; height: 50px; padding: 0 26px; border-radius: 999px;
  font: 600 1rem/1 var(--body); text-decoration: none; cursor: pointer;
  border: 1px solid transparent;
  transition: transform var(--short) var(--ease), background var(--short) var(--ease),
    border-color var(--short) var(--ease), box-shadow var(--short) var(--ease), color var(--short) var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn-gold { background: rgb(var(--gold)); color: rgb(var(--on-gold)); box-shadow: 0 8px 30px -10px rgb(var(--glow) / 0.65); }
.btn-gold:hover { box-shadow: 0 10px 40px -8px rgb(var(--glow) / 0.8); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: rgb(var(--ink)); border-color: rgb(var(--line)); }
.btn-ghost:hover { border-color: rgb(var(--ink-3)); }
.btn-sm { height: 40px; padding: 0 18px; font-size: 0.9rem; }
.btn-lg { height: 58px; padding: 0 36px; font-size: 1.08rem; }
.btn[disabled] { opacity: 0.35; cursor: default; transform: none; }
.btn:focus-visible, a:focus-visible, summary:focus-visible { outline: 2px solid rgb(var(--gold)); outline-offset: 3px; }

/* ---------------------------------------------------------------- hero */
.hero { position: relative; padding: 56px 0 72px; overflow: hidden; }
.hero::before {
  content: ''; position: absolute; inset: -20% -10% auto auto; width: 70vw; height: 70vw; max-width: 900px; max-height: 900px;
  background: radial-gradient(closest-side, rgb(var(--glow) / 0.14), transparent 70%);
  pointer-events: none;
}
.hero-grid { position: relative; display: grid; gap: 40px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font: 500 0.82rem/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase;
  color: rgb(var(--gold)); margin-bottom: 18px;
}
h1 { font-size: clamp(2.8rem, 8.6vw, 5rem); line-height: 1; font-weight: 700; }
.lead { margin-top: 24px; font-size: 1.16rem; color: rgb(var(--ink-2)); max-width: 34em; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.ticks { display: flex; flex-wrap: wrap; gap: 8px 22px; list-style: none; padding: 0; margin: 28px 0 0; color: rgb(var(--ink-3)); font-size: 0.9rem; }
.ticks li { display: flex; align-items: center; gap: 8px; }
.ticks li::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: rgb(var(--gold)); }

.hero-art { margin: 0; justify-self: center; width: min(100%, 500px); }
.hero-art figcaption { margin-top: 14px; text-align: center; font-size: 0.88rem; color: rgb(var(--ink-3)); }
#graph { width: 100%; height: auto; overflow: visible; }
#graph .link { stroke: rgb(var(--ink-4)); stroke-linecap: round; transition: stroke var(--page-t) var(--ease), stroke-opacity var(--page-t) var(--ease); }
#graph .link.on { stroke: rgb(var(--gold)); stroke-opacity: 1; }
#graph .link.off { stroke-opacity: 0.28; }
#graph .node { cursor: default; transition: opacity var(--page-t) var(--ease); }
#graph .node.off { opacity: 0.5; }
#graph .node .dot { stroke: rgb(var(--page)); stroke-width: 3; }
#graph .node .halo { fill-opacity: 0; transition: fill-opacity var(--page-t) var(--ease); }
#graph .node.on .halo { fill-opacity: 0.22; }
#graph .node text { font: 500 14px var(--mono); fill: rgb(var(--ink-2)); text-anchor: middle; }
#graph .node.on text { fill: rgb(var(--ink)); font-weight: 600; }

@media (min-width: 960px) {
  .hero { padding: 88px 0 112px; }
  .hero-grid { grid-template-columns: 1.1fr 0.9fr; gap: 64px; }
}

/* ---------------------------------------------------------------- sections */
.section { padding: 88px 0; }
.section-alt { background: rgb(var(--panel) / 0.55); border-block: 1px solid rgb(var(--line-soft)); }
.section-head { max-width: 760px; margin-bottom: 44px; }
h2 { font-size: clamp(2rem, 5.6vw, 3.25rem); line-height: 1.05; font-weight: 700; }
.sub { margin-top: 18px; color: rgb(var(--ink-2)); font-size: 1.08rem; }
h3 { font-size: 1.32rem; font-weight: 600; letter-spacing: -0.01em; }

.card {
  background: rgb(var(--panel));
  border: 1px solid rgb(var(--line-soft));
  border-radius: var(--radius);
  padding: 28px;
}
.card p { color: rgb(var(--ink-2)); margin-top: 10px; }

/* ---------------------------------------------------------------- the idea */
.idea-grid { display: grid; gap: 36px; align-items: center; }
@media (min-width: 960px) { .idea-grid { grid-template-columns: 1.15fr 0.85fr; gap: 72px; } }
.idea-grid .section-head { margin-bottom: 0; }
.sub + .sub { margin-top: 14px; }
.quote {
  position: relative; margin: 0; padding: 34px 32px 28px;
  background: rgb(var(--panel)); border: 1px solid rgb(var(--line-soft)); border-left: 3px solid rgb(var(--gold));
  border-radius: 6px var(--radius) var(--radius) 6px;
}
.quote::before { content: '“'; position: absolute; top: -6px; left: 24px; font: 700 4.2rem/1 var(--display); color: rgb(var(--gold)); }
.quote p { font: 500 1.4rem/1.42 var(--display); letter-spacing: -0.01em; margin-top: 14px; }
.quote footer { margin-top: 18px; color: rgb(var(--ink-3)); font: 400 0.82rem var(--mono); }

.layers { display: grid; gap: 18px; }
@media (min-width: 900px) { .layers { grid-template-columns: 1fr 1fr; } }
.layer { display: flex; flex-direction: column; }
.card .layer-tag { margin: 0 0 14px; font: 500 0.78rem/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: rgb(var(--gold)); }
.ranks { list-style: none; padding: 0; margin: 26px 0 0; display: grid; gap: 11px; }
.ranks li { display: grid; grid-template-columns: 6.6em 1fr 2.8em; align-items: center; gap: 12px; }
.term-name { display: flex; align-items: center; gap: 8px; min-width: 0; font: 500 0.92rem var(--mono); color: rgb(var(--ink)); }
.term-name::before { content: ''; flex: none; width: 9px; height: 9px; border-radius: 50%; background: var(--term, rgb(var(--gold))); }
.bar { height: 10px; border-radius: 6px; background: var(--term, rgb(var(--gold))); transition: width 1040ms var(--ease); }
.bar[data-w="100"] { width: 100%; } .bar[data-w="84"] { width: 84%; } .bar[data-w="71"] { width: 71%; }
.bar[data-w="62"] { width: 62%; } .bar[data-w="50"] { width: 50%; } .bar[data-w="46"] { width: 46%; }
.bar[data-w="38"] { width: 38%; } .bar[data-w="31"] { width: 31%; } .bar[data-w="23"] { width: 23%; }
.js .layer:not(.in) .bar { width: 0; }
.pct { font: 500 0.85rem var(--mono); color: rgb(var(--ink-2)); text-align: right; }
.define { margin-top: 24px; padding-top: 20px; border-top: 1px solid rgb(var(--line-soft)); }
.card .define-head { margin: 0; display: flex; flex-wrap: wrap; align-items: center; gap: 10px; font-size: 0.95rem; }
.define .ranks { margin-top: 16px; }
.edge-note { margin-top: 18px; display: flex; flex-wrap: wrap; align-items: center; gap: 16px 22px; }
.card.edge-note p { margin: 0; flex: 1 1 22em; }
.edge-note strong { color: rgb(var(--ink)); font-weight: 600; }
.term-edge { font-size: 1.05rem; padding: 11px 16px; }

.tri { display: grid; gap: 30px; }
@media (min-width: 860px) { .tri { grid-template-columns: repeat(3, 1fr); gap: 44px; } }
.tri-item { border-top: 1px solid rgb(var(--line)); padding-top: 22px; }
.tri-n { font: 600 0.85rem var(--mono); color: rgb(var(--gold)); margin-bottom: 14px; }
.tri-item h3 { font-size: 1.45rem; }
.tri-item p:last-child { color: rgb(var(--ink-2)); margin-top: 10px; }

/* ---------------------------------------------------------------- how */
.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 18px; }
@media (min-width: 860px) { .steps { grid-template-columns: repeat(3, 1fr); } }
.steps .card { display: flex; flex-direction: column; }
.step-n {
  display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%;
  font: 700 0.95rem/1 var(--display); color: rgb(var(--on-gold)); background: rgb(var(--gold));
  margin-bottom: 18px; flex: none;
}
.chip-demo {
  margin-top: auto; padding-top: 22px; display: flex; flex-wrap: wrap; align-items: center; gap: 10px 12px; font-size: 0.88rem;
}
.up { color: rgb(var(--good)); font-family: var(--mono); }

/* a word, as the app shows one: mono, in its own colour */
.term {
  display: inline-flex; align-items: center; gap: 8px;
  font: 500 0.95rem/1 var(--mono);
  padding: 8px 12px; border-radius: 999px;
  background: rgb(var(--panel-2)); border: 1px solid rgb(var(--line-soft));
  color: rgb(var(--ink));
}
.term::before { content: ''; width: 9px; height: 9px; border-radius: 50%; background: var(--term, rgb(var(--gold))); }

/* ---------------------------------------------------------------- the story */
.story { display: grid; gap: 24px; padding: 18px; }
@media (min-width: 960px) { .story { grid-template-columns: 1.55fr 1fr; padding: 28px; gap: 36px; } }
.story-chart svg { width: 100%; height: auto; overflow: visible; }
.story-side { display: flex; flex-direction: column; gap: 22px; padding: 6px 6px 8px; }
.story-dots { display: flex; gap: 8px; list-style: none; padding: 0; margin: 0; }
.story-dots li { width: 26px; height: 4px; border-radius: 4px; background: rgb(var(--line)); transition: background var(--page-t) var(--ease); }
.story-dots li.on { background: rgb(var(--gold)); }
.story-text { font: 500 1.22rem/1.45 var(--display); min-height: 5.8em; color: rgb(var(--ink)); }
.story-text b { color: rgb(var(--gold)); font-weight: 600; }
.story-ledger { margin: 0; display: grid; gap: 10px; border-top: 1px solid rgb(var(--line-soft)); padding-top: 18px; }
.story-ledger div { display: flex; justify-content: space-between; align-items: baseline; }
.story-ledger dt { display: flex; align-items: center; gap: 10px; color: rgb(var(--ink-2)); }
.story-ledger dd { margin: 0; font: 500 1rem var(--mono); }
.swatch { width: 12px; height: 12px; border-radius: 3px; }
.swatch-a { background: var(--ana, rgb(var(--gold))); }
.swatch-b { background: var(--ben, #4ec9e8); }
.story-ctl { display: flex; gap: 10px; margin-top: auto; }

.axis { stroke: rgb(var(--line)); stroke-width: 1; }
.grid-line { stroke: rgb(var(--line-soft)); stroke-width: 1; stroke-dasharray: 2 5; }
.axis-label { fill: rgb(var(--ink-3)); font: 400 13px var(--mono); }
.curve-line { fill: none; stroke: rgb(var(--ink)); stroke-width: 2.5; stroke-linecap: round; }
.price-dot { fill: rgb(var(--gold)); stroke: rgb(var(--panel)); stroke-width: 3; }
.price-tag { fill: rgb(var(--ink)); font: 600 15px var(--mono); }
.area-label { font: 600 14px var(--mono); }
.narrow .axis-label { font-size: 15px; }
.narrow .price-tag { font-size: 17px; }
.narrow .area-label { font-size: 15px; }

.facts { display: grid; gap: 18px; margin-top: 18px; }
@media (min-width: 860px) { .facts { grid-template-columns: repeat(3, 1fr); } }
.fact { padding: 24px 26px; border-radius: var(--radius); border: 1px solid rgb(var(--line-soft)); background: rgb(var(--panel) / 0.6); }
.fact-big { font: 700 2.1rem/1 var(--display); color: rgb(var(--gold)); margin-bottom: 10px; letter-spacing: -0.02em; }
.fact p:last-child { color: rgb(var(--ink-2)); }

/* one price, two pictures */
.views { margin-top: 18px; display: grid; gap: 18px; }
.views-head h3 { font-size: 1.2rem; }
.card .views-head p { margin-top: 6px; }
.views-charts { display: grid; gap: 14px 28px; }
@media (min-width: 700px) { .views-charts { grid-template-columns: 1fr 1fr; } }
.views figure { margin: 0; }
.views figcaption { font: 500 0.8rem/1 var(--mono); color: rgb(var(--ink-3)); margin-bottom: 8px; }
.views svg { width: 100%; height: auto; overflow: visible; cursor: ew-resize; touch-action: pan-y; }
.views .axis-label { font-size: 12px; }
@media (max-width: 520px) { .views .axis-label { font-size: 15px; } }
.views-area { fill: rgb(var(--gold)); fill-opacity: 0.16; }
.guide { stroke: rgb(var(--ink-4)); stroke-width: 1; stroke-dasharray: 3 4; }
.views-ctl { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 22px; }
.views-ctl input { flex: 1 1 220px; accent-color: rgb(var(--gold)); }
.card .views-read { margin: 0; font: 500 0.92rem var(--mono); color: rgb(var(--ink-2)); }
.views-read b { color: rgb(var(--ink)); font-weight: 600; }
@media (min-width: 700px) { .card .views-read { min-width: 47ch; } }

/* ---------------------------------------------------------------- features */
.grid4 { display: grid; gap: 18px; }
@media (min-width: 700px) { .grid4 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1100px) { .grid4 { grid-template-columns: repeat(4, 1fr); } }
.feature { position: relative; overflow: hidden; transition: border-color var(--short) var(--ease), transform var(--short) var(--ease); }
.feature::after {
  content: ''; position: absolute; left: 28px; top: 0; width: 36px; height: 3px; border-radius: 0 0 3px 3px;
  background: rgb(var(--gold));
}
.feature:hover { border-color: rgb(var(--line)); transform: translateY(-2px); }

/* ---------------------------------------------------------------- rules */
.rules { display: grid; gap: 0; border: 1px solid rgb(var(--line-soft)); border-radius: var(--radius); overflow: hidden; background: rgb(var(--panel)); }
@media (min-width: 860px) { .rules { grid-template-columns: repeat(4, 1fr); } }
.rule { padding: 28px; border-bottom: 1px solid rgb(var(--line-soft)); }
.rule:last-child { border-bottom: 0; }
@media (min-width: 860px) {
  .rule { border-bottom: 0; border-right: 1px solid rgb(var(--line-soft)); }
  .rule:last-child { border-right: 0; }
}
.rule h3 { font-size: 1.16rem; display: flex; align-items: center; gap: 10px; }
.rule h3::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: rgb(var(--gold)); flex: none; }
.rule p { color: rgb(var(--ink-2)); margin-top: 10px; font-size: 0.97rem; }
.contract { margin-top: 22px; color: rgb(var(--ink-3)); font-size: 0.9rem; }
.contract a { color: rgb(var(--ink-2)); text-underline-offset: 3px; }

/* ---------------------------------------------------------------- live */
.pulse { width: 8px; height: 8px; border-radius: 50%; background: rgb(var(--good)); box-shadow: 0 0 0 0 rgb(var(--good) / 0.6); animation: pulse 2s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgb(var(--good) / 0.55); } 70% { box-shadow: 0 0 0 10px rgb(var(--good) / 0); } 100% { box-shadow: 0 0 0 0 rgb(var(--good) / 0); } }
.live-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.live-list a {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 16px 18px; border-radius: 14px; text-decoration: none;
  background: rgb(var(--panel)); border: 1px solid rgb(var(--line-soft));
  transition: border-color var(--short) var(--ease), transform var(--short) var(--ease);
}
.live-list a:hover { border-color: var(--term, rgb(var(--gold))); transform: translateY(-2px); }
.live-word { display: flex; align-items: center; gap: 10px; min-width: 0; font: 500 1rem var(--mono); }
.live-word span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.live-word::before { content: ''; flex: none; width: 10px; height: 10px; border-radius: 50%; background: var(--term); }
.live-price { text-align: right; font: 500 0.95rem var(--mono); white-space: nowrap; }
.live-price small { display: block; color: rgb(var(--ink-3)); font-size: 0.75rem; margin-top: 3px; }

/* ---------------------------------------------------------------- start */
.start { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
@media (min-width: 860px) { .start { grid-template-columns: repeat(4, 1fr); gap: 18px; } }
.start li { display: flex; gap: 16px; padding: 24px; border-radius: var(--radius); background: rgb(var(--panel)); border: 1px solid rgb(var(--line-soft)); }
@media (min-width: 860px) { .start li { flex-direction: column; gap: 0; } }
.start h3 { font-size: 1.12rem; }
.start p { color: rgb(var(--ink-2)); margin-top: 8px; font-size: 0.95rem; }
.cta-center { display: flex; justify-content: center; margin-top: 44px; }

/* ---------------------------------------------------------------- faq */
.faq { border-top: 1px solid rgb(var(--line-soft)); }
.faq details { border-bottom: 1px solid rgb(var(--line-soft)); }
.faq summary {
  list-style: none; cursor: pointer; padding: 22px 40px 22px 0; position: relative;
  font: 500 1.12rem/1.4 var(--display);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ''; position: absolute; right: 6px; top: 50%; width: 10px; height: 10px; margin-top: -7px;
  border-right: 2px solid rgb(var(--ink-3)); border-bottom: 2px solid rgb(var(--ink-3));
  transform: rotate(45deg); transition: transform var(--short) var(--ease);
}
.faq details[open] summary::after { transform: rotate(225deg); margin-top: -2px; }
.faq details p { padding: 0 0 24px; color: rgb(var(--ink-2)); max-width: 44em; }

/* ---------------------------------------------------------------- footer */
.foot { padding: 44px 0 56px; border-top: 1px solid rgb(var(--line-soft)); }
.risk { max-width: 860px; margin-bottom: 40px; padding: 22px 24px; border: 1px solid rgb(var(--line)); border-left: 3px solid rgb(var(--warn)); border-radius: 6px 12px 12px 6px; background: rgb(var(--panel) / 0.6); }
.risk h2 { font: 600 1rem/1.3 var(--display); letter-spacing: 0; color: rgb(var(--ink)); }
.risk p { margin-top: 8px; font-size: 0.88rem; line-height: 1.6; color: rgb(var(--ink-2)); }
.foot-row { display: flex; flex-wrap: wrap; align-items: center; gap: 18px 32px; }
.foot .brand img { height: 28px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 22px; font-size: 0.92rem; }
.foot-links a { color: rgb(var(--ink-2)); text-decoration: none; }
.foot-links a:hover { color: rgb(var(--ink)); }
.foot .muted { margin-left: auto; }

/* ---------------------------------------------------------------- arrival */
.js [data-reveal] { opacity: 0; transform: translateY(14px); transition: opacity var(--hop) var(--ease), transform var(--hop) var(--ease); }
.js [data-reveal].in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
}

@media (max-width: 520px) {
  :root { --gutter: 18px; }
  body { font-size: 17px; }
  .section { padding: 68px 0; }
  .card { padding: 22px; }
  .btn { height: 48px; padding: 0 22px; }
  .brand img { height: 30px; }
  #graph .node text { font-size: 18px; }
}

.down { color: rgb(var(--bad)); font-family: var(--mono); }

/* ---------------------------------------------------------------- the white paper
 * A document in the page: one column in a book face, numbered sections, its
 * equations in MathML (the browser sets them; nothing loaded). */
.paper-section { padding: 96px 0 104px; border-top: 1px solid rgb(var(--line-soft)); }
.paper {
  --serif: 'Iowan Old Style', 'Palatino Linotype', Palatino, 'Book Antiqua', Charter, Georgia, 'DejaVu Serif', serif;
  max-width: 780px; margin: 0 auto; padding: 56px 60px 64px;
  background: rgb(var(--panel)); border: 1px solid rgb(var(--line-soft)); border-radius: 10px;
  box-shadow: 0 30px 80px -40px rgb(0 0 0 / 0.5);
  font: 400 1.04rem/1.72 var(--serif); color: rgb(var(--ink));
  counter-reset: sec;
}
.paper .paper-meta { font: 500 0.78rem/1.6 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: rgb(var(--gold)); }
.paper h2 { font: 700 clamp(1.9rem, 4.6vw, 2.6rem)/1.12 var(--display); letter-spacing: -0.02em; margin-top: 14px; }
.paper .byline { margin-top: 14px; color: rgb(var(--ink-3)); font: 400 0.9rem/1.5 var(--body); }
.paper .byline code { word-break: break-all; }
.paper .abstract { margin: 34px 0 8px; padding: 22px 26px; border-left: 3px solid rgb(var(--gold)); background: rgb(var(--page) / 0.55); border-radius: 0 8px 8px 0; }
.paper .abstract h3 { font: 600 0.78rem/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: rgb(var(--ink-3)); margin-bottom: 10px; }
.paper .abstract p { font-size: 0.98rem; }
.paper .toc { margin: 30px 0 0; padding: 0; list-style: none; columns: 2 16em; column-gap: 28px; font: 400 0.9rem/1.9 var(--body); }
.paper .toc li { margin-top: 0; break-inside: avoid; }
.paper .toc a { color: rgb(var(--ink-2)); text-decoration: none; }
.paper .toc a:hover { color: rgb(var(--gold)); }
.paper .toc span { font-family: var(--mono); color: rgb(var(--ink-4)); margin-right: 8px; }
.paper h3.sec { counter-increment: sec; counter-reset: sub; margin: 52px 0 6px; font: 650 1.42rem/1.3 var(--display); letter-spacing: -0.01em; }
.paper h3.sec::before { content: counter(sec) '\2003'; color: rgb(var(--gold)); }
.paper h3.sec.plain { counter-increment: none; }
.paper h3.sec.plain::before { content: none; }
.paper h4 { counter-increment: sub; margin: 30px 0 4px; font: 600 1.06rem/1.4 var(--display); }
.paper h4::before { content: counter(sec) '.' counter(sub) '\2002'; color: rgb(var(--ink-3)); }
.paper p { margin-top: 14px; }
.paper p, .paper li { color: rgb(var(--ink) / 0.9); hyphens: auto; }
.paper ul, .paper ol.list { margin: 12px 0 0; padding-left: 1.4em; }
.paper li { margin-top: 6px; }
.paper em { color: inherit; font-style: italic; }
.paper strong { font-weight: 700; }
.paper code { font-size: 0.86em; padding: 1px 5px; border-radius: 4px; background: rgb(var(--page) / 0.7); }
.paper a { color: rgb(var(--gold)); text-underline-offset: 3px; }
.paper .def { margin: 18px 0 0; padding: 14px 20px; border: 1px solid rgb(var(--line-soft)); border-radius: 8px; background: rgb(var(--page) / 0.4); }
.paper .def b { font-family: var(--display); font-weight: 650; }
.paper math { font-size: 1.08em; }
.paper math[display='block'] { margin: 18px 0; overflow-x: auto; overflow-y: hidden; padding: 4px 0; }
.paper .eq { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 12px; }
.paper .eq-n { font: 400 0.9rem var(--body); color: rgb(var(--ink-3)); }
.paper table { width: 100%; margin: 18px 0 0; border-collapse: collapse; font: 400 0.9rem/1.5 var(--body); }
.paper th, .paper td { text-align: left; padding: 8px 10px; border-bottom: 1px solid rgb(var(--line-soft)); vertical-align: top; }
.paper th { font-weight: 600; color: rgb(var(--ink-2)); }
.paper td.num, .paper th.num { text-align: right; font-family: var(--mono); }
.paper .refs { margin-top: 12px; padding-left: 0; list-style: none; font-size: 0.92rem; }
.paper .refs li { padding-left: 2.4em; text-indent: -2.4em; }
.paper .refs li span { display: inline-block; width: 2.4em; text-indent: 0; color: rgb(var(--ink-3)); font-family: var(--mono); font-size: 0.85em; }
@media (max-width: 640px) {
  .paper { padding: 32px 20px 40px; border-radius: 8px; font-size: 1rem; }
  .paper .abstract { padding: 18px; }
}