:root {
  --bg: #f8f9fd;
  --surface: #ffffff;
  --text: #191c22;
  --muted: #444853;
  --primary: #1f4fb4;
  --border: #c4c7d2;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101318;
    --surface: #181b21;
    --text: #e1e2e9;
    --muted: #c3c6d1;
    --primary: #b2c5ff;
    --border: #43474f;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { padding-top: 32px; padding-bottom: 8px; }
.brand { display: flex; align-items: center; gap: 14px; }
.brand img { width: 52px; height: 52px; border-radius: 12px; }
.brand strong { display: block; font-size: 1.15rem; }
.brand span { color: var(--muted); font-size: 0.9rem; }
nav { margin-top: 16px; display: flex; gap: 20px; flex-wrap: wrap; }
nav a { color: var(--primary); text-decoration: none; font-weight: 600; }
nav a:hover, nav a[aria-current="page"] { text-decoration: underline; }
main { padding-top: 12px; padding-bottom: 24px; }
h1 { font-size: 1.9rem; line-height: 1.25; margin: 20px 0 4px; }
h2 { font-size: 1.25rem; margin: 32px 0 8px; }
p, li { color: var(--text); }
.meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 20px; }
ul { padding-left: 22px; }
li { margin: 6px 0; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  margin: 16px 0;
}
table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 0.95rem; }
th, td { text-align: left; padding: 10px 12px; border: 1px solid var(--border); vertical-align: top; }
th { background: var(--surface); }
a { color: var(--primary); }
footer { padding-top: 16px; padding-bottom: 40px; color: var(--muted); font-size: 0.9rem; border-top: 1px solid var(--border); margin-top: 32px; }
footer a { margin-right: 16px; }