:root {
  --brand: #c72a35;
  --bg: #ffffff;
  --surface: #f6f5f4;
  --text: #1a1a1a;
  --muted: #5c5c5c;
  --line: #e4e1de;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand: #ff6b75;
    --bg: #0f0f0f;
    --surface: #1a1a1a;
    --text: #f2f2f2;
    --muted: #a8a8a8;
    --line: #2c2c2c;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
header {
  border-bottom: 1px solid var(--line);
}
header .wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 14px;
  padding-bottom: 14px;
}
header img { width: 44px; height: 44px; }
header a.home { color: var(--text); font-weight: 700; text-decoration: none; }
nav { margin-left: auto; display: flex; gap: 16px; font-size: 15px; }
nav a { color: var(--muted); text-decoration: none; }
nav a[aria-current="page"] { color: var(--brand); font-weight: 600; }
.wrap { max-width: 720px; margin: 0 auto; padding: 0 20px; }
main { padding: 32px 0 64px; }
h1 { font-size: 34px; line-height: 1.15; margin: 0 0 6px; }
h2 { font-size: 21px; margin: 36px 0 8px; }
.updated { color: var(--muted); margin: 0 0 24px; }
a { color: var(--brand); }
ul { padding-left: 22px; }
li { margin: 4px 0; }
.note {
  background: var(--surface);
  border-radius: 12px;
  padding: 14px 18px;
  margin: 20px 0;
}
.hero { text-align: center; padding-top: 24px; }
.hero img { width: 200px; height: auto; }
.cards { display: grid; gap: 12px; margin-top: 28px; }
.cards a {
  display: block;
  background: var(--surface);
  border-radius: 12px;
  padding: 16px 18px;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}
.cards span { display: block; color: var(--muted); font-weight: 400; font-size: 15px; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; padding: 20px 0 40px; }
@media (max-width: 520px) {
  h1 { font-size: 28px; }
  nav { gap: 12px; }
}