/* Dark is the default theme; light is applied when the user's OS prefers it. */
:root {
  --bg: #0e1116;
  --panel: #161b22;
  --panel-2: #1c2330;
  --border: #2a3140;
  --text: #e6edf3;
  --muted: #9aa7b4;
  --accent: #4f8cff;
  --accent-2: #f78166;
  --ok: #3fb950;
  --tab-active-bg: #1c2330;
  --radius: 10px;
  --maxw: 1040px;
  --contentw: 720px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f8fa;
    --panel: #ffffff;
    --panel-2: #f1f4f8;
    --border: #d6dce4;
    --text: #1f2328;
    --muted: #5b6570;
    --accent: #2f6fe0;
    --accent-2: #d1481f;
    --ok: #1a7f37;
    --tab-active-bg: #ffffff;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
/* No global hover underline (looks like old hyperlinks). Prose links opt in below. */

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

header.site {
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 10;
}
header.site .wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 58px;
}
.brand { display: inline-flex; align-items: center; }
.brand img { height: 22px; width: auto; display: block; }
header.site nav { display: flex; gap: 20px; margin-left: auto; }
header.site nav a { color: var(--muted); font-size: 14px; }
header.site nav a:hover { color: var(--text); }
header.site nav a.active { color: var(--text); }

main { padding: 40px 0 80px; }

.hero { padding: 40px 0 20px; }
.hero h1 { font-size: 40px; line-height: 1.1; letter-spacing: -0.03em; margin: 0 0 14px; }
.hero p { font-size: 18px; color: var(--muted); max-width: 660px; margin: 0 0 24px; }

.btn {
  display: inline-block;
  padding: 9px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.btn:hover { border-color: var(--accent); }

h2.section {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--muted);
  margin: 40px 0 14px;
}

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }

.card {
  display: block;
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: var(--radius);
  padding: 18px 20px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); text-decoration: none; }
.card h3 { margin: 0 0 6px; font-size: 18px; letter-spacing: -0.01em; color: var(--text); }
.card p { margin: 0 0 12px; color: var(--muted); font-size: 14px; }
.card .meta { font-family: var(--mono); font-size: 12px; color: var(--muted); }

.pill { display: inline-block; font-size: 11px; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--border); color: var(--muted); vertical-align: middle; }
.pill.published { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, transparent); }

/* ── Benchmark detail ── */
.detail-head { margin-bottom: 8px; }
.detail-head h1 { font-size: 32px; letter-spacing: -0.02em; margin: 0 0 6px; }
.detail-head .tagline { color: var(--muted); font-size: 17px; margin: 0 0 10px; }
.detail-head .byline { font-size: 14px; color: var(--muted); }
.detail-head .byline a { color: var(--accent); }

.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin: 22px 0 24px;
  overflow-x: auto;
}
.tab {
  appearance: none;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  padding: 10px 14px;
  cursor: pointer;
  white-space: nowrap;
  margin-bottom: -1px;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--text); border-bottom-color: var(--accent); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.prose { max-width: var(--contentw); }
.prose p { margin: 0 0 16px; font-size: 16px; }
.prose a { color: var(--accent); }
.prose a:hover { text-decoration: underline; }

.metrics { max-width: var(--contentw); display: flex; flex-direction: column; gap: 12px; }
.metric {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.metric .name { font-family: var(--mono); font-size: 15px; color: var(--text); }
.metric .name .unit { color: var(--muted); font-size: 13px; margin-left: 6px; }
.metric .kind { font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); border: 1px solid var(--border); border-radius: 999px; padding: 1px 7px; margin-left: 8px; }
.metric .desc { color: var(--muted); font-size: 14px; margin-top: 6px; }

.publisher { max-width: var(--contentw); border: 1px solid var(--border); background: var(--panel); border-radius: var(--radius); padding: 22px 24px; }
.publisher h3 { margin: 0 0 4px; font-size: 22px; letter-spacing: -0.01em; }
.publisher .since { color: var(--muted); font-size: 13px; margin: 0 0 14px; }
.publisher p { color: var(--text); margin: 0 0 16px; }
.publisher a.site { color: var(--accent); font-size: 14px; }
.publisher a.site:hover { text-decoration: underline; }

/* ── Chart controls ── */
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: flex-end;
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 18px;
}
.field { display: flex; flex-direction: column; gap: 4px; }
.field label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.field select {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 7px 10px;
  font-size: 14px;
  font-family: var(--sans);
}
.controls .spacer { margin-left: auto; }
.controls .links { display: flex; gap: 10px; align-items: center; }

.chart-panel { border: 1px solid var(--border); background: var(--panel); border-radius: var(--radius); padding: 18px; }
#chart { width: 100%; }
.empty { color: var(--muted); padding: 40px; text-align: center; }
.status { color: var(--muted); font-size: 13px; margin-top: 10px; min-height: 18px; }
.error { color: var(--accent-2); }

/* uPlot theming via CSS vars */
.uplot, .u-title { color: var(--text); font-family: var(--sans); }
.u-legend { color: var(--muted); font-size: 13px; }
.u-legend .u-marker { border-radius: 2px; }

footer.site { border-top: 1px solid var(--border); color: var(--muted); font-size: 13px; margin-top: 40px; }
footer.site .wrap { padding: 22px 20px; display: flex; gap: 16px; align-items: center; }
footer.site a { color: var(--muted); }
footer.site a:hover { color: var(--text); }