:root {
  --blue: #426b85;
  --ink: #2f3d47;
  --muted: #61717c;
  --line: #e1e7ea;
  --paper: #fffefc;
  --bg: #f4f6f8;
  --accent: #e76f51;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Sarabun', 'Noto Sans Thai', system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 17px;
  line-height: 1.7;
}

header {
  background: var(--blue);
  color: #fff;
  padding: 14px 16px;
}

header .bar {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

header a.brand {
  color: #fff;
  font-weight: 800;
  font-size: 20px;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

header img { width: 34px; height: 34px; border-radius: 8px; }

nav.lang { margin-left: auto; display: flex; gap: 6px; }

nav.lang button {
  border: 1px solid rgba(255, 255, 255, 0.6);
  background: transparent;
  color: #fff;
  border-radius: 999px;
  padding: 4px 12px;
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}

nav.lang button[aria-pressed='true'] { background: #fff; color: var(--blue); font-weight: 700; }

main {
  max-width: 820px;
  margin: 24px auto;
  padding: 28px 22px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
}

h1 { font-size: 28px; line-height: 1.3; margin: 0 0 4px; }
h2 { font-size: 21px; margin: 30px 0 8px; color: var(--blue); }
h3 { font-size: 18px; margin: 20px 0 6px; }
.updated { color: var(--muted); font-size: 14px; margin: 0 0 18px; }
.note {
  background: #f1f8f4;
  border: 1px solid #cbe3d5;
  border-radius: 12px;
  padding: 12px 14px;
}
.warn {
  background: #fff6ee;
  border: 1px solid #f2d3bd;
  border-radius: 12px;
  padding: 12px 14px;
}
table { border-collapse: collapse; width: 100%; font-size: 15.5px; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: #f2f5f7; }
a { color: var(--blue); }
ol li, ul li { margin: 4px 0; }

.links { display: grid; gap: 12px; margin-top: 18px; }
.links a {
  display: block;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
}
.links a span { display: block; font-weight: 400; color: var(--muted); font-size: 15px; }

footer { text-align: center; color: var(--muted); font-size: 14px; padding: 0 16px 32px; }

/* one language at a time once lang.js has run; both stay visible without JS */
html.js [data-lang] { display: none; }
html.js.lang-th [data-lang='th'], html.js.lang-en [data-lang='en'] { display: block; }