:root {
  color-scheme: light dark;
  --fg: #1a1a1a;
  --muted: #666;
  --bg: #ffffff;
  --accent: #2b6cb0;
  --border: #e2e2e2;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #ededed;
    --muted: #a0a0a0;
    --bg: #161616;
    --accent: #7fb1e6;
    --border: #2c2c2c;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Helvetica Neue", Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.8;
  margin: 0;
  padding: 0;
}
.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}
header.site {
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
  margin-bottom: 2rem;
}
header.site a.brand {
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  color: var(--fg);
}
nav.lang { float: right; font-size: 0.85rem; }
nav.lang a { color: var(--accent); text-decoration: none; margin-left: 0.75rem; }
h1 { font-size: 1.6rem; line-height: 1.4; margin: 0 0 0.25rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 0.5rem; }
p, li { font-size: 0.98rem; }
a { color: var(--accent); }
.updated { color: var(--muted); font-size: 0.85rem; margin-bottom: 2rem; }
.placeholder {
  background: rgba(255, 196, 0, 0.16);
  border: 1px dashed rgba(180, 130, 0, 0.6);
  border-radius: 4px;
  padding: 0 0.3em;
  font-weight: 600;
}
.notice {
  border-left: 3px solid var(--accent);
  padding: 0.5rem 1rem;
  background: rgba(43, 108, 176, 0.07);
  margin: 1.5rem 0;
  font-weight: 600;
}
footer.site {
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  padding-top: 1rem;
  color: var(--muted);
  font-size: 0.85rem;
}
footer.site a { color: var(--muted); margin-right: 1rem; }
table.kv { border-collapse: collapse; width: 100%; margin: 1rem 0; }
table.kv th, table.kv td {
  border: 1px solid var(--border);
  padding: 0.6rem 0.75rem;
  text-align: left;
  vertical-align: top;
  font-size: 0.95rem;
}
table.kv th { width: 34%; background: rgba(128, 128, 128, 0.08); font-weight: 600; }