:root {
  color-scheme: light;
  --bg: #f2f6ff;
  --card: #ffffff;
  --text: #1c2740;
  --muted: #5b6b80;
  --line: #dce6fb;
  --primary: #325dff;
  --primary-2: #8b5cf6;
  --accent: #00b8a9;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Arial, sans-serif;
  background:
    radial-gradient(circle at 0% 0%, #e8f0ff 0, transparent 36%),
    radial-gradient(circle at 100% 0%, #efe9ff 0, transparent 30%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: rgba(255,255,255,0.88);
  border-bottom: 1px solid var(--line);
}
.site-header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 14px;
}
.brand:hover { text-decoration: none; }
.brand-word {
  font-size: 24px;
  line-height: 1;
  font-weight: 800;
  text-transform: lowercase;
  letter-spacing: .2px;
  color: #0f2e5e;
}
.brand-sub {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 999px;
  line-height: 1;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--primary));
}
.header-actions a {
  display: inline-block;
  padding: 7px 12px;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  font-size: 13px;
  font-weight: 600;
}
.header-actions a:hover {
  text-decoration: none;
  filter: brightness(1.05);
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: 0 14px 30px rgba(40,62,120,0.07);
}
h1, h2, h3 { margin-top: 0; line-height: 1.25; }
h1 { font-size: 30px; margin-bottom: 10px; }
h2 { font-size: 22px; margin-bottom: 10px; margin-top: 16px; color: #253f86; }
h3 { font-size: 17px; margin-bottom: 8px; margin-top: 14px; color: #294057; }
p { margin: 8px 0; color: var(--text); }
ul, ol { margin: 8px 0 8px 20px; }
li { margin: 5px 0; }
.muted { color: var(--muted); }
.pill {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: #edf4ff;
  color: #2459c9;
  font-size: 12px;
  font-weight: 600;
  margin-right: 6px;
}
.topnav {
  margin-bottom: 16px;
  font-size: 14px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 12px;
}
.grid a {
  display: block;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  background: #fff;
  transition: transform .16s ease, box-shadow .16s ease;
}
.grid a:hover {
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(50,93,255,.14);
}
code {
  background: #f1f5fb;
  border: 1px solid #e2eaf5;
  border-radius: 6px;
  padding: 1px 5px;
}
.doc-footer {
  margin-top: 24px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(180deg, #fff, #f8faff);
  color: var(--muted);
  font-size: 13px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: space-between;
  align-items: center;
}
.doc-footer a { font-weight: 600; }
.footer-note {
  margin-top: 16px;
  font-size: 13px;
  color: var(--muted);
}
.warning-bar {
  background: #fff4e5;
  border: 1px solid #ffd8a8;
  border-left: 5px solid #ff922b;
  border-radius: 10px;
  padding: 12px 14px;
  color: #7a4100;
  font-weight: 600;
}
@media (max-width: 700px) {
  .site-header-inner { padding: 9px 12px; }
  .brand-word { font-size: 21px; }
  .brand-sub { font-size: 10px; padding: 4px 7px; }
  .header-actions a { padding: 6px 10px; font-size: 12px; }
  .wrap { padding: 14px 12px 30px; }
  .card { padding: 16px; border-radius: 14px; }
  h1 { font-size: 24px; }
  h2 { font-size: 19px; }
  h3 { font-size: 16px; }
  .grid { grid-template-columns: 1fr; gap: 10px; }
  .doc-footer { display: block; line-height: 1.8; }
}