:root {
  --bg: #f6f8fa;
  --panel: #ffffff;
  --border: #d0d7de;
  --fg: #1f2328;
  --muted: #59636e;
  --accent: #0969da;
  --accent2: #bc4c00;
  --accent3: #1a7f37;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}
a { color: var(--accent); }
header, nav, main, footer { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
header { padding-top: 32px; padding-bottom: 8px; }
h1 { font-size: 2.2rem; margin: 0 0 8px; letter-spacing: -0.02em; }
.tagline { color: var(--muted); margin: 4px 0; max-width: 70ch; }

nav {
  position: sticky; top: 0; z-index: 10;
  background: rgba(246,248,250,0.92);
  backdrop-filter: blur(6px);
  padding-top: 12px; padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  display: flex; flex-wrap: wrap; gap: 8px;
}
nav a {
  font-size: 0.85rem; text-decoration: none;
  padding: 4px 10px; border: 1px solid var(--border);
  border-radius: 999px; color: var(--muted);
  background: var(--panel);
}
nav a:hover { color: var(--fg); border-color: var(--accent); }

main { padding-top: 24px; padding-bottom: 48px; }
.loading { color: var(--muted); }

.category { margin: 36px 0 12px; }
.category h2 {
  font-size: 1.3rem; margin: 0 0 4px;
  text-transform: capitalize;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
  gap: 18px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px 10px;
}
.card h3 { margin: 0; font-size: 1.05rem; }
.card .meta { color: var(--muted); font-size: 0.8rem; margin: 2px 0 8px; }
.card .meta code { color: var(--accent2); }
svg { display: block; width: 100%; height: auto; overflow: visible; }
.axis { stroke: #8c959f; stroke-width: 1; }
.grid-line { stroke: var(--border); stroke-width: 1; stroke-dasharray: 2 3; opacity: 0.9; }
.tick-label { fill: var(--muted); font-size: 10px; }
.axis-title { fill: var(--muted); font-size: 11px; }
.errbar { stroke-width: 1.4; }
.legend { font-size: 11px; fill: var(--muted); }
.annotation-label { font-size: 10px; font-weight: 600; }

.pred-table {
  width: 100%; border-collapse: collapse;
  font-size: 0.92rem; margin: 12px 0 24px;
  background: var(--panel);
  border: 1px solid var(--border); border-radius: 10px;
  overflow: hidden;
}
.pred-table th, .pred-table td {
  padding: 8px 12px; border-bottom: 1px solid var(--border);
  text-align: left; vertical-align: top;
}
.pred-table th {
  background: #eaeef2; font-weight: 600; color: var(--fg);
}
.pred-table tr:last-child td { border-bottom: none; }
.pred-table td.num { font-variant-numeric: tabular-nums;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, monospace; }
.hint { color: var(--muted); font-style: italic; font-size: 0.9em; }

/* global all-masses figure */
.global-wrap {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  margin-top: 10px;
}
.global-label { font-size: 11px; }
.global-band { stroke: none; }

/* vertical-zoom control bar */
#zoom-bar {
  margin: 30px 0 6px;
  padding: 10px 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.84rem;
  display: flex; flex-wrap: wrap; gap: 6px 12px; align-items: baseline;
}
.zoom-label { color: var(--muted); }
#zoom-links { display: inline-flex; flex-wrap: wrap; gap: 6px; }
#zoom-links a {
  text-decoration: none;
  padding: 3px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--accent);
}
#zoom-links a.active {
  background: var(--accent); color: #fff; border-color: var(--accent);
}
.ann-toggle {
  display: inline-flex; gap: 4px; align-items: center;
  color: var(--muted); padding-left: 4px;
}
.ann-toggle input { cursor: pointer; }
.ann-toggle label { cursor: pointer; }

.tooltip {
  position: fixed; pointer-events: none;
  background: #1f2328; color: #fff;
  border: 1px solid #1f2328; border-radius: 6px;
  padding: 6px 9px; font-size: 12px; z-index: 50;
  opacity: 0; transition: opacity 0.08s;
  white-space: nowrap;
}
footer {
  border-top: 1px solid var(--border);
  padding-top: 16px; padding-bottom: 40px;
  color: var(--muted); font-size: 0.82rem;
}
footer code { color: var(--accent2); }

@media print {
  nav { position: static; }
  #zoom-bar { background: none; }
  .card, .global-wrap { break-inside: avoid; }
}