/* Citensus — site styles. Chart tokens follow the validated reference palette. */

:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --accent: #2a78d6;        /* series-1 blue, light step */
  --accent-deep: #1c5cab;   /* blue 550 for links/hover */
  --whisker: #52514e;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --muted: #898781;
    --grid: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --accent: #3987e5;      /* series-1 blue, dark step */
    --accent-deep: #6da7ec;
    --whisker: #c3c2b7;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --ink: #ffffff;
  --ink-2: #c3c2b7;
  --muted: #898781;
  --grid: #2c2c2a;
  --baseline: #383835;
  --border: rgba(255, 255, 255, 0.10);
  --accent: #3987e5;
  --accent-deep: #6da7ec;
  --whisker: #c3c2b7;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
}
a { color: var(--accent-deep); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 880px; margin: 0 auto; padding: 0 24px; }

header.site {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 20px 0; border-bottom: 1px solid var(--grid);
}
.logo { font-weight: 700; font-size: 20px; letter-spacing: -0.02em; color: var(--ink); }
.logo .tick { color: var(--accent); }
nav a { margin-left: 20px; font-size: 14px; color: var(--ink-2); }
nav a.active { color: var(--ink); font-weight: 600; }

.hero { padding: 72px 0 40px; }
.hero h1 {
  font-size: clamp(30px, 5vw, 44px); line-height: 1.15;
  letter-spacing: -0.02em; margin: 0 0 16px; max-width: 20ch;
}
.hero p.lede { font-size: 19px; color: var(--ink-2); max-width: 56ch; margin: 0 0 28px; }

.btn {
  display: inline-block; padding: 10px 18px; border-radius: 8px;
  font-size: 15px; font-weight: 600;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-deep); text-decoration: none; }
.btn.ghost { border: 1px solid var(--border); color: var(--ink); margin-left: 10px; }

.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin: 40px 0; }
.tile {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 16px 18px;
}
.tile .big { font-size: 28px; font-weight: 700; letter-spacing: -0.02em; }
.tile .cap { font-size: 13px; color: var(--ink-2); margin-top: 2px; }

section.block { padding: 36px 0; border-top: 1px solid var(--grid); }
section.block h2 { font-size: 24px; letter-spacing: -0.01em; margin: 0 0 12px; }
section.block p { color: var(--ink-2); max-width: 62ch; }
section.block li { color: var(--ink-2); margin-bottom: 6px; }

.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.cols h3 { font-size: 16px; margin: 0 0 6px; }
.cols p { font-size: 14.5px; }

footer.site {
  padding: 32px 0 48px; border-top: 1px solid var(--grid);
  font-size: 13px; color: var(--muted);
}

/* ---------- Chart components ---------- */
.chart-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 20px 22px; margin: 24px 0;
}
.chart-card h3 { margin: 0 0 2px; font-size: 17px; }
.chart-card .sub { font-size: 13.5px; color: var(--ink-2); margin: 0 0 16px; }

.barlist { display: grid; grid-template-columns: max-content 1fr max-content; gap: 8px 12px; align-items: center; }
.barlist .name { font-size: 14px; color: var(--ink); white-space: nowrap; }
.barlist .val { font-size: 13.5px; color: var(--ink-2); font-variant-numeric: tabular-nums; white-space: nowrap; }
.track { position: relative; height: 18px; }
.track::before {
  content: ""; position: absolute; inset: 2px 0; border-left: 1px solid var(--baseline);
}
.bar {
  position: absolute; top: 2px; bottom: 2px; left: 0;
  background: var(--accent); border-radius: 0 4px 4px 0;
  min-width: 2px;
}
.ci {
  position: absolute; top: 50%; height: 0; border-top: 1.5px solid var(--whisker);
  opacity: 0.75;
}
.ci::before, .ci::after {
  content: ""; position: absolute; top: -4px; height: 8px; border-left: 1.5px solid var(--whisker);
}
.ci::before { left: 0; } .ci::after { right: 0; }
.row-hit { position: absolute; inset: -4px 0; cursor: default; }

.viz-tooltip {
  position: fixed; z-index: 10; pointer-events: none;
  background: var(--surface); color: var(--ink);
  border: 1px solid var(--border); border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  padding: 8px 12px; font-size: 13px; line-height: 1.45;
  max-width: 260px; display: none;
}
.viz-tooltip .t-title { font-weight: 600; }
.viz-tooltip .t-sub { color: var(--ink-2); }

.note {
  font-size: 13px; color: var(--muted); border-left: 3px solid var(--grid);
  padding: 2px 0 2px 12px; margin: 20px 0;
}

table.data { border-collapse: collapse; width: 100%; font-size: 14px; margin: 12px 0; }
table.data th { text-align: left; color: var(--ink-2); font-weight: 600; border-bottom: 1px solid var(--baseline); padding: 6px 10px 6px 0; }
table.data td { border-bottom: 1px solid var(--grid); padding: 6px 10px 6px 0; font-variant-numeric: tabular-nums; }

.demo-video {
  display: block; width: 100%; height: auto; margin-top: 8px;
  border: 1px solid var(--border); border-radius: 12px;
  background: var(--surface);
}

/* ---------- Demo page ---------- */
.demo-controls { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin: 20px 0; }
.demo-controls select {
  flex: 1; min-width: 260px; max-width: 640px;
  padding: 10px 12px; font: inherit; font-size: 14.5px;
  color: var(--ink); background: var(--surface);
  border: 1px solid var(--baseline); border-radius: 8px;
}
.btn.small { padding: 9px 16px; font-size: 14px; cursor: pointer; border: none; font-family: inherit; }
.btn.small:disabled { opacity: 0.45; cursor: default; }
.btn.ghost.small { border: 1px solid var(--border); background: none; }

.demo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: start; }
@media (max-width: 760px) { .demo-grid { grid-template-columns: 1fr; } }

.run-meta { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 8px; }
.run-count { font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }
.answer-text { font-size: 14.5px; color: var(--ink-2); line-height: 1.65; min-height: 96px; }
.answer-text .hl {
  color: var(--ink); font-weight: 600;
  border-bottom: 2px solid var(--accent);
}
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.chip {
  font-size: 12px; color: var(--ink-2);
  border: 1px solid var(--grid); border-radius: 999px;
  padding: 2px 10px; background: var(--page);
}
.chip-label { font-size: 12px; color: var(--muted); width: 100%; margin-bottom: -2px; }
.converge-note { font-size: 13px; color: var(--muted); margin-top: 14px; }
.demo-empty { color: var(--muted); font-size: 14px; padding: 24px 0; }

.doc h2 { font-size: 22px; margin-top: 36px; }
.doc h3 { font-size: 17px; margin-top: 24px; }
.doc p, .doc li { color: var(--ink-2); }
.doc { padding-bottom: 48px; }