:root{
  --bg:#f7f6f2; --card:#ffffff; --ink:#1d2421; --muted:#5d6762; --line:#e3e1da;
  --brand:#0f7a4f; --brand-ink:#ffffff; --accent:#e8b923;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#121614; --card:#1a201d; --ink:#e9efeb; --muted:#9aa6a0; --line:#2b332f;
         --brand:#3cc68a; --brand-ink:#0b1410; --accent:#f0c94a; }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:"Noto Sans Thai","Noto Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  line-height:1.7;font-size:16px}
a{color:var(--brand)}
.wrap{max-width:860px;margin:0 auto;padding:0 16px}
header{border-bottom:1px solid var(--line);background:var(--card)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:700}
.logo .mark{width:34px;height:34px;border-radius:9px;background:var(--brand);color:var(--brand-ink);
  display:grid;place-items:center;font-size:18px}
nav{display:flex;gap:4px;flex-wrap:wrap;align-items:center}
nav a{padding:6px 10px;border-radius:8px;text-decoration:none;color:var(--muted);font-size:15px}
nav a:hover,nav a[aria-current=page]{background:var(--bg);color:var(--ink)}
.lang{border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:8px;
  padding:5px 10px;font:inherit;font-size:14px;cursor:pointer}
main{padding:32px 0 48px}
h1{font-size:clamp(26px,5vw,38px);line-height:1.25;margin:0 0 12px}
h2{font-size:21px;margin:32px 0 8px}
h3{font-size:17px;margin:20px 0 4px}
.lead{font-size:18px;color:var(--muted);margin:0 0 24px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;margin:16px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.grid .card{margin:0}
.k{color:var(--muted);font-size:14px;margin:0}
.v{margin:0;font-weight:600;word-break:break-word}
.btn{display:inline-block;background:var(--brand);color:var(--brand-ink);text-decoration:none;
  padding:10px 18px;border-radius:10px;font-weight:600;margin:4px 8px 4px 0}
.btn.ghost{background:transparent;color:var(--brand);border:1px solid var(--brand)}
table{width:100%;border-collapse:collapse;font-size:15px}
th,td{text-align:left;vertical-align:top;padding:10px 8px;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-weight:600}
.tbl{overflow-x:auto}
.note{border-left:4px solid var(--accent);padding:10px 14px;background:var(--card);border-radius:0 10px 10px 0}
footer{border-top:1px solid var(--line);padding:20px 0 32px;color:var(--muted);font-size:14px}
footer p{margin:2px 0}
ol li,ul li{margin:4px 0}
/* bilingual */
html[lang=th] [lang=en]:not(html){display:none}
html[lang=en] [lang=th]:not(html){display:none}