/* Shared styles for BedMath's plain pages (home, About, Privacy, 404).
   Tool pages carry their own inline styles with the same color tokens. */
:root {
  --bg: #f7f6f2;
  --surface: #ffffff;
  --text: #1f2a24;
  --muted: #5b6660;
  --border: #d9dcd6;
  --accent: #2f7a4f;
  --accent-soft: #e3f1e8;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #151a17;
    --surface: #1e2521;
    --text: #e6ebe7;
    --muted: #9aa69f;
    --border: #34403a;
    --accent: #6cc392;
    --accent-soft: #1f3a2a;
  }
}
:root[data-theme="dark"] {
  --bg: #151a17;
  --surface: #1e2521;
  --text: #e6ebe7;
  --muted: #9aa69f;
  --border: #34403a;
  --accent: #6cc392;
  --accent-soft: #1f3a2a;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { padding-top: 16px; }
.site-nav { display: flex; flex-wrap: wrap; gap: 6px 18px; align-items: baseline; margin-bottom: 24px; font-size: 0.95rem; }
.site-nav .brand { font-weight: 700; color: var(--text); text-decoration: none; margin-right: auto; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.25rem; margin: 28px 0 8px; }
p, li { max-width: 68ch; }
a { color: var(--accent); }
.lede { color: var(--muted); font-size: 1.1rem; margin: 0 0 24px; }
.card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  margin: 0 0 16px;
  color: var(--text);
  text-decoration: none;
}
a.card:hover, a.card:focus-visible { border-color: var(--accent); }
.card h2 { margin: 0 0 4px; color: var(--accent); }
.card p { margin: 0; color: var(--muted); }
.note { background: var(--accent-soft); border-radius: 8px; padding: 10px 14px; }
.updated { color: var(--muted); font-size: 0.9rem; }
footer { color: var(--muted); font-size: 0.85rem; padding-top: 24px; padding-bottom: 32px; }
footer nav { display: flex; flex-wrap: wrap; gap: 6px 16px; }