:root {
  --brand: #0d47a1;
  --brand-soft: #e8eef8;
  --text: #1a2433;
  --muted: #5b6575;
  --line: #dde3ec;
  --bg: #ffffff;
  --card: #f6f8fb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand: #82aaf0;
    --brand-soft: #1b2638;
    --text: #e6eaf0;
    --muted: #a3acba;
    --line: #2c3545;
    --bg: #11161f;
    --card: #182030;
  }
  .logo { background: #fff; border-radius: 8px; padding: 4px 8px; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}
a { color: var(--brand); }
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.logo { height: 44px; display: block; }
nav { display: flex; gap: 14px; flex-wrap: wrap; font-size: 15px; }
nav a { text-decoration: none; }
nav a[aria-current] { font-weight: 600; text-decoration: underline; }
main { padding-top: 24px; padding-bottom: 40px; }
h1 { font-size: 28px; line-height: 1.25; margin: 8px 0 4px; }
h2 { font-size: 20px; margin: 32px 0 8px; color: var(--brand); }
h3 { font-size: 17px; margin: 20px 0 6px; }
.meta { color: var(--muted); font-size: 14px; margin: 0 0 20px; }
.note {
  background: var(--brand-soft);
  border-left: 4px solid var(--brand);
  padding: 12px 16px;
  border-radius: 6px;
  margin: 16px 0;
}
.hero { text-align: center; padding: 24px 0 8px; }
.hero img { width: 160px; max-width: 50%; }
.tagline { font-size: 20px; color: var(--muted); margin: 4px 0 24px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; }
.card h3 { margin-top: 0; }
table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 8px 0; }
th, td { text-align: left; vertical-align: top; padding: 8px; border-bottom: 1px solid var(--line); }
th { background: var(--card); }
.table-wrap { overflow-x: auto; }
footer { color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); padding-top: 16px; padding-bottom: 32px; }
@media (max-width: 520px) {
  header { flex-direction: column; align-items: flex-start; }
  h1 { font-size: 24px; }
}