:root {
  --bg: #fff6e8;
  --ink: #3a1a10;
  --soft: rgba(58, 26, 16, 0.65);
  --accent: #e0452b;
  --line: rgba(58, 26, 16, 0.14);
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #1e0907;
    --ink: #fff6e8;
    --soft: rgba(255, 246, 232, 0.7);
    --line: rgba(255, 246, 232, 0.16);
    --card: #2a1210;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', system-ui, sans-serif;
  line-height: 1.8;
}
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
header.site { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
header.site img { width: 48px; height: 48px; border-radius: 12px; }
header.site a { color: inherit; text-decoration: none; font-weight: 900; font-size: 20px; }
h1 { font-size: 26px; line-height: 1.4; margin: 0 0 8px; }
h2 { font-size: 18px; margin: 32px 0 8px; padding-top: 8px; border-top: 1px solid var(--line); }
p, li { font-size: 15px; }
.meta { color: var(--soft); font-size: 13px; }
a { color: var(--accent); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
.card { background: var(--card); border-radius: 16px; padding: 16px 20px; margin: 16px 0; }
nav.foot { margin-top: 48px; display: flex; flex-wrap: wrap; gap: 16px; font-size: 14px; }
.hero { text-align: center; padding: 24px 0; }
.hero img { width: 128px; height: 128px; border-radius: 28px; box-shadow: 0 8px 24px rgba(58, 26, 16, 0.25); }
.hero h1 { font-size: 32px; color: var(--accent); margin-top: 16px; }