/* Documentation site — shared shell, prose and demo-widget styles. */

:root {
  --bg: #14171c;
  --bg-2: #1a1e24;
  --panel: #1c2128;
  --line: #2a3038;
  --line-soft: #232931;
  --ink: #d7dde5;
  --ink-dim: #9aa3ad;
  --ink-faint: #6f7883;
  --amber: #e0a04a;
  --green: #6bbd84;
  --red: #d9655b;
  --blue: #6f9fd8;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.68 var(--sans);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--amber); text-decoration-thickness: 1px; text-underline-offset: 2px; }

/* ---- top bar ---- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 26px; flex-wrap: wrap;
  padding: 13px 28px;
  background: rgba(20,23,28,.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.brand {
  font: 700 13px/1 var(--mono);
  letter-spacing: .13em;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.brand span {
  margin-left: 8px; padding: 3px 6px;
  border-radius: 3px;
  background: rgba(224,160,74,.14);
  color: var(--amber);
  font-size: 10px; letter-spacing: .1em;
}
.topbar nav { display: flex; gap: 20px; flex-wrap: wrap; }
.topbar nav a {
  font: 500 13.5px/1 var(--sans);
  color: var(--ink-dim);
  text-decoration: none;
  padding: 5px 0;
  border-bottom: 1.5px solid transparent;
}
.topbar nav a:hover { color: var(--ink); }
.topbar nav a.on { color: var(--ink); border-bottom-color: var(--amber); }

/* ---- page frame ---- */
.page { max-width: 900px; margin: 0 auto; padding: 52px 28px 100px; }

h1 { font: 700 clamp(30px, 4.6vw, 44px)/1.1 var(--sans); letter-spacing: -.02em; margin: 14px 0 0; }
h2 {
  font: 700 24px/1.2 var(--sans); letter-spacing: -.012em;
  margin: 56px 0 0; padding-top: 26px; border-top: 1px solid var(--line-soft);
}
h3 { font: 600 17px/1.3 var(--sans); margin: 34px 0 0; }
p { margin: 15px 0 0; color: var(--ink-dim); }
.page > p:first-of-type, .lede { font-size: 17.5px; color: var(--ink-dim); }
strong { color: var(--ink); font-weight: 600; }

ul, ol { margin: 15px 0 0; padding-left: 20px; color: var(--ink-dim); }
li { margin-bottom: 8px; }
li::marker { color: var(--ink-faint); }

code {
  font: 500 13.5px/1.4 var(--mono);
  background: rgba(255,255,255,.05);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 5px;
  color: #c6ced8;
}
pre {
  margin: 20px 0 0;
  padding: 16px 18px;
  background: #0f1115;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow-x: auto;
}
pre code { background: none; border: 0; padding: 0; font-size: 13px; line-height: 1.65; color: #c6ced8; }

figure { margin: 26px 0 0; border: 1px solid var(--line); border-radius: 9px; overflow: hidden; background: #0f1115; }
figcaption {
  padding: 9px 13px; border-top: 1px solid var(--line);
  font: 500 11.5px/1.45 var(--mono); color: var(--ink-faint); background: var(--bg-2);
}

/* ---- demo widgets ---- */
.demo {
  margin: 28px 0 0;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 22px;
}
.demo-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 4px; }
.demo-head h3 { margin: 0; font-size: 16px; }
.demo-head .live {
  font: 600 10px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase;
  padding: 4px 7px; border-radius: 3px;
  background: rgba(107,189,132,.13); color: var(--green);
}
.demo-sub { margin: 6px 0 18px; font-size: 13.5px; color: var(--ink-faint); }

.controls { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 14px 20px; margin-bottom: 20px; }
.controls-wide { grid-template-columns: repeat(auto-fit, minmax(165px, 1fr)); }
.ctl label { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; margin-bottom: 5px; }
.ctl label span:first-child {
  font: 500 11px/1.3 var(--mono); letter-spacing: .05em; text-transform: uppercase; color: var(--ink-faint);
}
.ctl-val { font: 600 12px/1 var(--mono); color: var(--amber); white-space: nowrap; }
.ctl input[type=range] { width: 100%; accent-color: var(--blue); }

.toggle {
  width: 100%; padding: 8px 10px;
  background: var(--panel); color: var(--ink-dim);
  border: 1px solid var(--line); border-radius: 6px;
  font: 500 13px/1.2 var(--sans); cursor: pointer;
}
.toggle:hover { border-color: #3d4650; color: var(--ink); }
.toggle.on { background: rgba(107,189,132,.14); border-color: rgba(107,189,132,.4); color: var(--green); }

.seg { display: flex; gap: 0; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.seg-btn {
  flex: 1; padding: 7px 4px;
  background: var(--panel); color: var(--ink-dim);
  border: 0; border-right: 1px solid var(--line);
  font: 500 12px/1.2 var(--sans); cursor: pointer;
}
.seg-btn:last-child { border-right: 0; }
.seg-btn.on { background: rgba(111,159,216,.16); color: var(--blue); }

.demo-panel { display: grid; gap: 16px; }
.demo-panel.demo-split { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: start; }
.demo-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.demo canvas { border-radius: 7px; display: block; }
.demo-hint { margin: 0 0 4px; font-size: 13px; color: var(--ink-faint); grid-column: 1 / -1; }

.readout { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 7px; overflow: hidden; }
.ro-row { display: flex; justify-content: space-between; gap: 14px; padding: 9px 13px; background: var(--panel); }
.ro-k { font: 500 11px/1.4 var(--mono); letter-spacing: .05em; text-transform: uppercase; color: var(--ink-faint); }
.ro-v { font: 600 13px/1.3 var(--mono); color: var(--ink); text-align: right; }
.ro-v.amber { color: var(--amber); }
.ro-v.green { color: var(--green); }
.ro-v.red { color: var(--red); }

.bars { margin-top: 14px; display: grid; gap: 6px; }
.bar-row { display: grid; grid-template-columns: 130px 1fr 56px; gap: 10px; align-items: center; }
.bar-k { font: 500 11px/1.3 var(--mono); color: var(--ink-faint); }
.bar-track { height: 7px; background: #0f1115; border-radius: 4px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--amber); border-radius: 4px; }
.bar-fill.neg { background: var(--green); }
.bar-v { font: 600 11.5px/1 var(--mono); color: var(--ink-dim); text-align: right; }

/* ---- live 3D lab ---- */
.lab-stage { margin-top: 4px; }
.lab-status {
  margin: 10px 0 0; font: 500 11.5px/1.5 var(--mono);
  letter-spacing: .04em; color: var(--ink-faint);
}
.lab-buttons { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 14px; }
.lab-buttons .toggle { width: auto; padding: 8px 14px; }
.lab-buttons .seg { flex: 0 0 auto; }
.lab-buttons .seg-btn { padding: 8px 14px; white-space: nowrap; }

/* ---- roadmap ---- */
.rm { margin: 22px 0 0; border-top: 1px solid var(--line-soft); }
.rm-item {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 16px;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14.5px;
  color: var(--ink-dim);
}
.rm-item b { color: var(--ink); font-weight: 600; }
.pill {
  display: inline-block; justify-self: start;
  padding: 3px 7px; border-radius: 4px;
  font: 600 9.5px/1.35 var(--mono); letter-spacing: .1em; text-transform: uppercase;
  white-space: nowrap;
}
.pill.done  { background: rgba(107,189,132,.13); color: var(--green); }
.pill.next  { background: rgba(224,160,74,.13); color: var(--amber); }
.pill.later { background: rgba(111,159,216,.12); color: var(--blue); }
.pill.open  { background: rgba(217,101,91,.12); color: var(--red); }

footer.site {
  border-top: 1px solid var(--line);
  padding: 30px 28px 54px;
  color: var(--ink-faint);
  font: 500 12.5px/1.6 var(--mono);
  text-align: center;
}

@media (max-width: 760px) {
  .topbar { gap: 14px; padding: 12px 18px; }
  .topbar nav { gap: 14px; }
  .page { padding: 36px 18px 70px; }
  .demo { padding: 16px; }
  .demo-row, .demo-panel.demo-split { grid-template-columns: 1fr; }
  .bar-row { grid-template-columns: 100px 1fr 50px; }
  .rm-item { grid-template-columns: 1fr; gap: 8px; }
}