:root {
  --bg: #F5F0E8;
  --card: #FFFDF8;
  --text: #3A2E26;
  --muted: #7A6B60;
  --primary: #C67B5C;
  --line: #E8DFD3;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1F1B17;
    --card: #2A2520;
    --text: #F2EAE0;
    --muted: #B8AA9C;
    --primary: #E0957A;
    --line: #3A332C;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 40px 16px 64px; }
header { display: flex; align-items: center; gap: 16px; margin-bottom: 24px; }
header img { width: 64px; height: 64px; border-radius: 14px; }
h1 { font-size: 28px; line-height: 1.25; margin: 0; }
.sub { color: var(--muted); margin: 2px 0 0; }
h2 { font-size: 20px; margin: 32px 0 8px; color: var(--primary); }
h3 { font-size: 17px; margin: 20px 0 4px; }
section { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 4px 20px 16px; margin-top: 16px; }
a { color: var(--primary); }
nav { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 8px; }
footer { color: var(--muted); font-size: 14px; margin-top: 40px; text-align: center; }
ul { padding-left: 20px; }