/* Shared header, footer, and color tokens for every page. Theme is chosen by /theme-init.js, which sets
   <html data-theme="light|dark"> before first paint (system preference unless the visitor picked one). */
:root {
  --bg: #fafafa;
  --fg: #1a1a1a;
  --muted: #666;
  --card: #fff;
  --border: #e2e2e2;
  --accent: #6d28d9;
  --accent-soft: #ede9fe;
  --accent-2: #0d9488;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #111317;
  --fg: #ececec;
  --muted: #9a9a9a;
  --card: #1b1e24;
  --border: #2c3038;
  --accent: #a78bfa;
  --accent-soft: #2e1065;
  --accent-2: #2dd4bf;
  color-scheme: dark;
}
html, body { background: var(--bg); color: var(--fg); }

.site-shell { max-width: 1100px; margin: 0 auto; padding: 0 16px; }
[data-site-header] {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  font: 15px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.site-brand { display: inline-flex; align-items: center; gap: 10px; color: var(--fg); text-decoration: none; }
.site-brand img { width: 32px; height: 32px; }
.site-wordmark { font-family: var(--mono); font-weight: 700; font-size: 1.25rem; letter-spacing: 0.02em; }
.site-nav { display: flex; gap: 4px; flex-wrap: wrap; }
.site-nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 8px;
}
.site-nav a:hover { color: var(--fg); background: var(--card); }
.site-nav a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); }
.site-links { margin-left: auto; display: flex; gap: 6px; align-items: center; }
.site-links a, .site-links button { color: var(--muted); display: inline-flex; padding: 6px; border-radius: 8px; background: none; border: 0; cursor: pointer; font: inherit; }
.site-links a:hover, .site-links button:hover { color: var(--fg); background: var(--card); }
.site-links button:focus-visible, .site-links a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.theme-toggle .sun, :root[data-theme="dark"] .theme-toggle .moon { display: none; }
:root[data-theme="dark"] .theme-toggle .sun { display: inline; }

[data-site-footer] {
  margin-top: 48px;
  padding: 20px 0 8px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font: 14px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.site-footer-links { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-bottom: 10px; }
.site-footer-links a { color: var(--muted); text-decoration: none; display: inline-flex; align-items: center; gap: 6px; }
.site-footer-links a:hover { color: var(--fg); }
.site-copyright { margin: 0; }

@media (max-width: 600px) {
  .site-links { margin-left: 0; }
}