:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1d1d1f;
  --muted: #6e6e73;
  --accent: #e91e63;
  --card: #f5f5f7;
  --border: #d2d2d7;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1c1e;
    --fg: #f5f5f7;
    --muted: #98989d;
    --card: #2c2c2e;
    --border: #3a3a3c;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.8;
}
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}
header.site {
  border-bottom: 1px solid var(--border);
  padding: 14px 20px;
}
header.site .inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}
header.site .icon {
  width: 28px; height: 28px;
  border-radius: 7px;
  background: linear-gradient(135deg, #f06292, #e91e63);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 15px;
}
h1 { font-size: 1.7rem; margin: 1.2em 0 0.5em; }
h2 {
  font-size: 1.2rem;
  margin: 2em 0 0.6em;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
p, li { color: var(--fg); }
.muted { color: var(--muted); font-size: 0.9rem; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
dt { font-weight: 700; margin-top: 1.2em; }
dd { margin: 0.3em 0 0 0; }
footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}