:root {
  --fg: #1f2328;
  --muted: #59636e;
  --line: #d8dee4;
  --accent: #0b6bcb;
  --bg: #ffffff;
  --soft: #f6f8fa;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --fg: #e6edf3; --muted: #9198a1; --line: #30363d; --accent: #4493f8; --bg: #0d1117; --soft: #161b22; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.75 "Noto Sans Thai", "Sarabun", "Leelawadee UI", "Thonburi", system-ui, sans-serif;
}
a { color: var(--accent); }
header.site, footer.site {
  max-width: 46rem;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.25rem;
  align-items: center;
  justify-content: space-between;
}
header.site { border-bottom: 1px solid var(--line); }
footer.site { border-top: 1px solid var(--line); color: var(--muted); font-size: .875rem; }
.brand { font-weight: 700; font-size: 1.125rem; text-decoration: none; color: var(--fg); }
.brand span { color: var(--muted); font-weight: 400; }
nav { display: flex; gap: 1rem; font-size: .9375rem; }
main.doc { max-width: 46rem; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; }
h1 { font-size: 1.6rem; line-height: 1.35; margin: .5rem 0 1rem; }
h2 { font-size: 1.2rem; margin: 2rem 0 .5rem; padding-top: .5rem; border-top: 1px solid var(--line); }
p, ul, ol { margin: .5rem 0 1rem; }
ul, ol { padding-left: 1.4rem; }
li { margin: .25rem 0; }
code { background: var(--soft); padding: .1rem .3rem; border-radius: 4px; }
.hero { text-align: center; padding: 4rem 1.25rem 3rem; }
.hero h1 { font-size: 2rem; margin-bottom: .25rem; }
.hero p { color: var(--muted); }
.links { display: flex; flex-direction: column; gap: .5rem; align-items: center; margin-top: 2rem; }