:root {
  --bg: #f7f4ee;
  --text: #1f1b16;
  --secondary: #5e554a;
  --line: rgba(31, 27, 22, 0.1);
  --accent: #8a5a12;
  --display: "Hiragino Mincho ProN", "Yu Mincho", serif;
  --body: -apple-system, "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0d1118; --text: #efe9de; --secondary: #aaa398; --line: rgba(239, 233, 222, 0.1); --accent: #e7b467; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--body); font-size: 16px; line-height: 1.8; }
.site-header, main { max-width: 680px; margin: 0 auto; padding: 0 20px; }
.site-header { display: flex; justify-content: space-between; align-items: center; height: 64px; border-bottom: 1px solid var(--line); }
.wordmark { font-family: var(--display); font-weight: 600; font-size: 18px; color: var(--text); text-decoration: none; }
.lang { font-size: 14px; color: var(--secondary); }
main { padding-top: 48px; padding-bottom: 80px; }
h1 { font-family: var(--display); font-weight: 600; font-size: 32px; line-height: 1.3; margin: 0 0 16px; }
h2 { font-size: 18px; font-weight: 600; margin: 40px 0 8px; }
p, ul { margin: 0 0 12px; }
ul { padding-left: 1.2em; }
.intro { color: var(--secondary); }
.date { margin-top: 40px; font-size: 14px; color: var(--secondary); }
a { color: var(--accent); }
hr { border: 0; border-top: 1px solid var(--line); margin: 64px 0; }