:root {
  --bg: #fbfaff;
  --surface: #ffffff;
  --text: #1c1b22;
  --muted: #5d5a6b;
  --accent: #4f5aa8;
  --border: #e4e2ef;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121118;
    --surface: #1b1a23;
    --text: #ecebf3;
    --muted: #a6a3b5;
    --accent: #aab3ff;
    --border: #2d2b38;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 48px 16px 64px; }
header.site { max-width: 720px; margin: 0 auto; padding: 20px 16px 0; }
header.site a { color: var(--text); text-decoration: none; font-weight: 600; }
h1 { font-size: 2rem; line-height: 1.25; margin: 0 0 8px; }
h2 { font-size: 1.25rem; margin: 40px 0 8px; }
h3 { font-size: 1.05rem; margin: 24px 0 4px; }
p, li { color: var(--text); }
.muted { color: var(--muted); }
a { color: var(--accent); }
ul { padding-left: 1.25rem; }
li { margin: 4px 0; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  margin: 24px 0;
}
.center { text-align: center; }
.icon { font-size: 56px; line-height: 1; margin-bottom: 12px; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { text-align: left; vertical-align: top; padding: 8px; border-bottom: 1px solid var(--border); }
footer { max-width: 720px; margin: 0 auto; padding: 24px 16px 48px; color: var(--muted); font-size: 0.9rem; border-top: 1px solid var(--border); }
footer a { color: var(--muted); margin-right: 16px; }