:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --text: #16202e;
  --muted: #5e6878;
  --accent: #1d6fb8;
  --line: #dfe5ee;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1622;
    --card: #172233;
    --text: #e8eef6;
    --muted: #a3adbb;
    --accent: #7fb0ff;
    --line: #26344a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}
main { max-width: 760px; margin: 0 auto; padding: 40px 16px 64px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 32px; }
.wordmark { height: 30px; }
.wordmark.dark { display: none; }
@media (prefers-color-scheme: dark) {
  .wordmark.light { display: none; }
  .wordmark.dark { display: inline; }
}
nav a { color: var(--muted); text-decoration: none; margin-left: 16px; }
nav a:hover { color: var(--accent); }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.25rem; margin: 32px 0 8px; }
p, li { color: var(--text); }
.muted { color: var(--muted); }
a { color: var(--accent); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 20px 22px; margin: 16px 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.lang { display: inline-block; font-size: .8rem; font-weight: 600; color: var(--muted); border: 1px solid var(--line); border-radius: 99px; padding: 2px 10px; }
footer { margin-top: 48px; font-size: .9rem; color: var(--muted); }
hr { border: 0; border-top: 1px solid var(--line); margin: 48px 0; }
.glance { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 14px; padding: 16px 20px; margin: 20px 0; }
.glance ul { margin: 8px 0 0; padding-left: 20px; }
.toc { columns: 2; column-gap: 32px; padding-left: 20px; font-size: .95rem; }
@media (max-width: 560px) { .toc { columns: 1; } }
.table-wrap { overflow-x: auto; margin: 16px 0; }
table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; }
.meta { font-size: .9rem; color: var(--muted); }
h3 { font-size: 1.05rem; margin: 20px 0 6px; }
section + section { margin-top: 8px; }