:root{
  --bg:#FBFAF7; --surface:#FFFFFF; --ink:#1C1A17; --ink2:#5B564E; --muted:#8A8378;
  --line:rgba(28,26,23,.09); --gold:#B08D57; --gold-ink:#7A5E33; --gold-soft:#F1E7D3;
  --fill:rgba(28,26,23,.06); --r-md:16px; --r-sm:12px;
  --font:"Noto Sans Thai",-apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  --brand:"Jost","SF Pro Display",-apple-system,sans-serif;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#131211; --surface:#1E1C19; --ink:#F1ECE2; --ink2:#C7BFB0; --muted:#8F877A;
  --line:rgba(241,236,226,.10); --gold:#C9A66B; --gold-ink:#E2C68F; --gold-soft:#332B1E;
  --fill:rgba(241,236,226,.08);
}}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);
  font-size:16px;line-height:1.72;-webkit-font-smoothing:antialiased}
.wrap{max-width:760px;margin-inline:auto;padding-inline:20px}
a{color:var(--gold-ink)}
a:hover{text-decoration:none}

.hdr{position:sticky;top:0;z-index:20;background:rgba(251,250,247,.9);
  -webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);
  border-bottom:.5px solid var(--line)}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .hdr{background:rgba(19,18,17,.9)}}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:54px}
.hdr img{height:15px;width:auto;display:block}
.hdr a.back{font-size:13.5px;text-decoration:none;color:var(--ink2);white-space:nowrap}
.hdr a.back:hover{color:var(--ink)}

.lead{padding:38px 0 8px}
.lead h1{font-size:clamp(26px,5.5vw,36px);line-height:1.22;margin:0 0 10px;letter-spacing:-.01em}
.lead .sub{color:var(--ink2);font-size:15px;margin:0}
.meta{display:flex;flex-wrap:wrap;gap:6px 16px;margin:16px 0 0;font-size:13px;color:var(--muted)}

.toc{background:var(--surface);border:.5px solid var(--line);border-radius:var(--r-md);
  padding:18px 20px;margin:26px 0 8px}
.toc h2{font-size:14px;margin:0 0 10px;color:var(--ink2);font-weight:600}
.toc ol{margin:0;padding-left:20px;columns:2;column-gap:26px;font-size:14px}
.toc li{margin-bottom:5px;break-inside:avoid}
.toc a{text-decoration:none}
.toc a:hover{text-decoration:underline}
@media(max-width:600px){.toc ol{columns:1}}

section{padding-top:34px;scroll-margin-top:70px}
h2{font-size:clamp(19px,3.6vw,23px);line-height:1.3;margin:0 0 12px;letter-spacing:-.005em}
h3{font-size:16px;margin:22px 0 8px}
p{margin:0 0 14px}
ul,ol{margin:0 0 14px;padding-left:22px}
li{margin-bottom:7px}
strong{font-weight:600}

.tbl{overflow-x:auto;margin:0 0 16px;border:.5px solid var(--line);border-radius:var(--r-sm)}
table{width:100%;border-collapse:collapse;font-size:14px;min-width:520px;background:var(--surface)}
th,td{text-align:left;padding:11px 13px;border-bottom:.5px solid var(--line);vertical-align:top}
th{background:var(--fill);font-weight:600;font-size:13px;color:var(--ink2)}
tr:last-child td{border-bottom:0}

.box{background:var(--gold-soft);border:.5px solid rgba(176,141,87,.3);border-radius:var(--r-sm);
  padding:14px 16px;margin:0 0 16px;font-size:14.5px}
.box p:last-child{margin-bottom:0}
.box b{color:var(--gold-ink)}

.foot{margin-top:54px;border-top:.5px solid var(--line);padding:26px 0 60px;
  font-size:13px;color:var(--muted)}
.foot img{height:13px;width:auto;display:block;opacity:.75;margin-bottom:12px}
.foot nav{display:flex;flex-wrap:wrap;gap:8px 18px;margin:0 0 14px}
.foot nav a{color:var(--ink2);text-decoration:none}
.foot nav a:hover{text-decoration:underline}
.foot .btn-link{border:0;background:none;font:inherit;color:var(--ink2);cursor:pointer;padding:0}
.foot .btn-link:hover{text-decoration:underline}