:root {
  --bg: #ffffff;
  --fg: #1f2328;
  --muted: #59636e;
  --line: #d1d9e0;
  --accent: #0969da;
  --panel: #f6f8fa;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #9198a1;
    --line: #30363d;
    --accent: #4493f8;
    --panel: #161b22;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 16px 64px;
}

header.top {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: baseline;
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
  margin-bottom: 28px;
}

header.top a.brand {
  font-weight: 650;
  color: var(--fg);
  text-decoration: none;
  margin-right: auto;
}

nav a, a { color: var(--accent); }

h1 { font-size: 28px; line-height: 1.25; margin: 0 0 8px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
h3 { font-size: 17px; margin: 22px 0 6px; }

.meta { color: var(--muted); font-size: 14px; margin-bottom: 24px; }

.lang {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 20px;
}

.note {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 16px;
  margin: 18px 0;
}

table { border-collapse: collapse; width: 100%; margin: 12px 0; font-size: 15px; }
th, td { text-align: left; border-bottom: 1px solid var(--line); padding: 8px 6px; vertical-align: top; }
th { color: var(--muted); font-weight: 600; }

hr.lang-split { border: 0; border-top: 1px solid var(--line); margin: 48px 0 32px; }

footer {
  border-top: 1px solid var(--line);
  margin-top: 48px;
  padding-top: 16px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 520px) {
  h1 { font-size: 24px; }
  table { font-size: 14px; }
}