:root {
  color-scheme: light dark;
  --background: #fffbf8;
  --foreground: #1a2338;
  --card: #ffffff;
  --muted: #fff1e6;
  --muted-foreground: #4a5878;
  --border: #e3e7ef;
  --primary: #c93f2a;
  --accent: #0f6b62;
  --warning: #ffebd6;
  --warning-foreground: #8a4b0f;
  --radius: 0.625rem;
}
@media (prefers-color-scheme: dark) {
  :root {
    --background: #0b1120;
    --foreground: #f4efea;
    --card: #121a2c;
    --muted: #1a2338;
    --muted-foreground: #a3aec4;
    --border: #253049;
    --primary: #ff8a70;
    --accent: #5fd3c3;
    --warning: #3a2a12;
    --warning-foreground: #ffb870;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--background);
  color: var(--foreground);
  font-family: Inter, "IBM Plex Sans Thai", system-ui, -apple-system, "Segoe UI", "Noto Sans Thai",
    "Sukhumvit Set", Tahoma, sans-serif;
  font-size: 1rem;
  line-height: 1.75;
}
a { color: var(--accent); text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 3px solid var(--primary); outline-offset: 3px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--card); padding: 0.5rem 1rem; }
.skip:focus { left: 1rem; top: 1rem; z-index: 10; }
.wrap { max-width: 46rem; margin: 0 auto; padding: 0 1rem; }
header.site { border-bottom: 1px solid var(--border); background: var(--card); }
header.site .wrap {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 0.5rem 1.5rem; padding-top: 0.75rem; padding-bottom: 0.75rem;
}
.brand { font-weight: 700; letter-spacing: -0.01em; color: var(--foreground); text-decoration: none; }
.brand::before {
  content: ""; display: inline-block; width: 0.7em; height: 0.7em; margin-right: 0.5em;
  border-radius: 50%; background: var(--primary);
}
nav ul { display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; margin: 0; padding: 0; list-style: none; }
nav [aria-current="page"] { font-weight: 700; color: var(--foreground); text-decoration: none; }
.brand { margin-right: auto; }
@media (max-width: 40rem) {  nav.lang { order: 1; }
  nav.menu { order: 2; flex-basis: 100%; }
}
nav.lang ul { gap: 0; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
nav.lang a { display: block; padding: 0.15rem 0.8rem; font-size: 0.9rem; text-decoration: none; }
nav.lang li + li a { border-left: 1px solid var(--border); }
nav.lang [aria-current="true"] { background: var(--muted); color: var(--foreground); font-weight: 700; }
main { padding-top: 2rem; padding-bottom: 3rem; }
h1 { font-size: 1.85rem; line-height: 1.3; margin: 0 0 1rem; letter-spacing: -0.01em; }
h2 { font-size: 1.25rem; line-height: 1.4; margin: 2.25rem 0 0.5rem; scroll-margin-top: 1rem; }
p, ul, ol { margin: 0 0 1rem; }
li { margin-bottom: 0.4rem; }
dl.meta {
  display: grid; grid-template-columns: max-content 1fr; gap: 0.35rem 1.25rem; margin: 0 0 1.5rem;
  padding: 1rem 1.25rem; background: var(--muted); border-radius: var(--radius);
}
dl.meta dt { color: var(--muted-foreground); }
dl.meta dd { margin: 0; overflow-wrap: anywhere; }
@media (max-width: 30rem) {
  dl.meta { grid-template-columns: 1fr; gap: 0; }
  dl.meta dd { margin-bottom: 0.6rem; }
}
code { font-family: ui-monospace, "SFMono-Regular", Menlo, monospace; font-size: 0.92em; }
.cards { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); margin: 1.5rem 0; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; }
.card h2 { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }
.card ul { padding-left: 1.2rem; margin-bottom: 0; }
.draft {
  background: var(--warning); color: var(--warning-foreground); border-radius: var(--radius);
  padding: 0.75rem 1rem; margin-bottom: 1.5rem; font-weight: 600;
}
mark.ph { background: var(--warning); color: var(--warning-foreground); padding: 0 0.25em; border-radius: 0.25em; }
footer.site { border-top: 1px solid var(--border); color: var(--muted-foreground); font-size: 0.9rem; padding: 1.5rem 0; }
@media print {
  header.site nav, .skip, .draft { display: none; }
  body { background: #fff; color: #000; }
}