:root {
  --bg: #fafafa;
  --fg: #1a1a1a;
  --muted: #5c5c5c;
  --border: #e0e0e0;
  --accent: #1d4ed8;
  --accent-fg: #ffffff;
  --card-bg: #ffffff;
  --code-bg: #f2f2f2;
  --max-width: 960px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --fg: #eaeaea;
    --muted: #a3a3a3;
    --border: #2c2c2c;
    --accent: #6ea8fe;
    --accent-fg: #0b1220;
    --card-bg: #1b1b1b;
    --code-bg: #1e1e1e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  border-bottom: 1px solid var(--border);
  padding: 0.9rem 0;
}
.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}
.site-header .brand {
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
}
.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.92rem;
}
.site-header nav a { color: var(--muted); }
.site-header nav a.active { color: var(--accent); font-weight: 600; }

main.wrap { padding-top: 2rem; padding-bottom: 3rem; min-height: 60vh; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.hero { padding: 1rem 0 0.5rem; }
.hero h1 { margin-bottom: 0.4rem; font-size: 2.1rem; }
.hero .lede { color: var(--muted); font-size: 1.05rem; max-width: 60ch; }
.hero-plot {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin: 1.5rem 0;
}

.cta { margin-top: 1.25rem; display: flex; gap: 0.75rem; flex-wrap: wrap; }

.button {
  display: inline-block;
  padding: 0.55rem 1.05rem;
  border-radius: 6px;
  background: var(--accent);
  color: var(--accent-fg) !important;
  font-weight: 600;
  text-decoration: none !important;
}
.button.secondary {
  background: transparent;
  color: var(--accent) !important;
  border: 1px solid var(--accent);
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0 1.5rem;
  font-size: 0.95rem;
}
th, td {
  border: 1px solid var(--border);
  padding: 0.45rem 0.65rem;
  text-align: left;
}
th { background: var(--code-bg); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
table.summary td:nth-child(2), table.summary td:nth-child(3) { text-align: right; font-variant-numeric: tabular-nums; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1rem 0 2rem;
}
.card {
  display: block;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  color: var(--fg) !important;
  text-decoration: none !important;
}
.card:hover { border-color: var(--accent); }
.card h3 { margin: 0 0 0.35rem; font-size: 1.05rem; color: var(--accent); }
.card p { margin: 0; color: var(--muted); font-size: 0.92rem; }

.prose h1:first-child { margin-top: 0; }
.prose { max-width: 74ch; }
.prose code, .prose pre {
  background: var(--code-bg);
  border-radius: 4px;
}
.prose code { padding: 0.1em 0.35em; font-size: 0.9em; }
.prose pre { padding: 0.9rem 1rem; overflow-x: auto; }
.prose pre code { padding: 0; background: none; }
.prose blockquote {
  border-left: 3px solid var(--border);
  margin: 1rem 0;
  padding: 0.1rem 1rem;
  color: var(--muted);
}

.plot-gallery { margin-top: 2rem; }
.plot-gallery figure { margin: 0 0 2rem; }
.plot-gallery img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  display: block;
}
.plot-gallery figcaption { color: var(--muted); font-size: 0.9rem; margin-top: 0.5rem; }

.report-list { list-style: none; padding: 0; columns: 2; column-gap: 2rem; }
.report-list li { margin-bottom: 0.5rem; break-inside: avoid; }
@media (max-width: 560px) { .report-list { columns: 1; } }

.back { margin-bottom: 0.5rem; font-size: 0.9rem; }

.report-links { margin-top: 2rem; display: flex; gap: 0.75rem; flex-wrap: wrap; }

pre.code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.88rem;
  line-height: 1.5;
}

section.readme { margin: 1rem 0 1.5rem; padding: 0.75rem 1rem; background: var(--code-bg); border-radius: 8px; }

.note { color: var(--muted); font-size: 0.9rem; }