/* bn26.click — design system (ธีมเข้ม ทอง-แดง) */
:root{
  --bg:#0B1020; --bg2:#0F1628; --panel:#141C31; --panel2:#1A2440;
  --line:#25314F; --line2:#334467;
  --gold:#F3B71B; --gold2:#FFD65C; --red:#E23B3B; --red2:#FF5A5A;
  --green:#28C76F; --text:#E9EEF9; --muted:#9DAAC6; --white:#fff;
  --r:14px; --r2:22px; --wrap:1180px;
  --sh:0 10px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--text);
  font:400 17px/1.85 "Noto Sans Thai",system-ui,-apple-system,"Segoe UI",sans-serif;
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--gold2);text-decoration:none}
a:hover{text-decoration:underline}
p{margin:0 0 18px}
ul,ol{margin:0 0 18px;padding-left:22px}
li{margin:6px 0}
strong{color:#fff}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 18px}
.mb0{margin-bottom:0}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;z-index:99;background:var(--gold);color:#111;padding:8px 14px;border-radius:8px}

/* topbar */
.topbar{background:#080C18;border-bottom:1px solid var(--line);font-size:14px;color:var(--muted)}
.topbar .wrap{display:flex;gap:16px;justify-content:space-between;align-items:center;flex-wrap:wrap;padding:8px 18px}
.topbar p{margin:0}
.b18{display:inline-block;background:var(--red);color:#fff;font-weight:700;font-size:12px;padding:1px 7px;border-radius:6px;margin-right:4px}

/* header */
.site-head{position:sticky;top:0;z-index:40;background:rgba(11,16,32,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.site-head .wrap{display:flex;align-items:center;gap:18px;min-height:66px}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:0;text-decoration:none}
.brand:hover{text-decoration:none}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:11px;
  background:linear-gradient(135deg,var(--gold),#E05A2B);color:#1A1206;font-weight:800;font-size:17px;letter-spacing:.5px}
.brand-txt{font-size:22px;color:#fff;font-weight:800;letter-spacing:.3px}
.brand-txt em{font-style:normal;color:var(--gold);font-weight:500;font-size:15px}
.nav{display:flex;align-items:center;gap:2px;margin-left:auto;flex-wrap:wrap}
.nav>a{color:var(--muted);padding:8px 11px;border-radius:9px;font-size:15.5px;white-space:nowrap}
.nav>a:hover{color:#fff;background:var(--panel);text-decoration:none}
.nav>a[aria-current=page]{color:#111;background:var(--gold);font-weight:700}
.nav-cta{display:flex;gap:8px;margin-left:10px}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line2);border-radius:9px;padding:9px 10px}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--text);margin:4px 0;border-radius:2px}
.btn{display:inline-block;border-radius:10px;padding:11px 20px;font-weight:700;font-size:15.5px;line-height:1.2;
  border:1px solid transparent;cursor:pointer;text-align:center}
.btn:hover{text-decoration:none;filter:brightness(1.06)}
.btn-gold{background:linear-gradient(135deg,var(--gold),#E9A00A);color:#1A1206}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line2)}
.btn-red{background:var(--red);color:#fff}
.btn-lg{padding:15px 30px;font-size:17px;border-radius:12px}

/* crumbs */
.crumbs{border-bottom:1px solid var(--line);background:var(--bg2);font-size:14px;color:var(--muted)}
.crumbs .wrap{padding:10px 18px}
.crumbs span{color:var(--muted)}

/* main + sections */
main{display:block;padding-bottom:40px}
section{padding:46px 0}
section+section{border-top:1px solid var(--line)}
.sect-h{font-size:clamp(21px,2.6vw,29px);line-height:1.5;margin:0 0 10px;color:#fff;font-weight:800;max-width:960px}
.sect-lead{color:var(--muted);margin:0 0 24px;max-width:860px}
.paper{background:var(--bg2)}
h3{font-size:19px;margin:26px 0 10px;color:#fff;font-weight:700;line-height:1.6}
h4{font-size:16.5px;margin:18px 0 8px;color:var(--gold2)}

/* hero */
.hero{position:relative;background:
  radial-gradient(1100px 460px at 12% -10%,rgba(243,183,27,.16),transparent 62%),
  radial-gradient(900px 420px at 96% 0%,rgba(226,59,59,.14),transparent 60%),var(--bg);
  padding:44px 0 40px;border-bottom:1px solid var(--line)}
.hero .wrap{display:grid;grid-template-columns:1.08fr .92fr;gap:34px;align-items:center}
.hero h1{font-size:clamp(25px,3.5vw,41px);line-height:1.42;margin:0 0 14px;color:#fff;font-weight:800}
.hero p{color:#C8D3E8;max-width:640px}
.hero-art{border-radius:var(--r2);overflow:hidden;border:1px solid var(--line2);box-shadow:var(--sh)}
.hero-art img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0 18px}
.pills{display:flex;gap:10px;flex-wrap:wrap;list-style:none;padding:0;margin:0}
.pills li{background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:7px 15px;font-size:14px;color:#CFD9EE;margin:0}
.pills b{color:var(--gold)}

/* toc */
.toc{background:var(--panel);border:1px solid var(--line);border-left:4px solid var(--gold);border-radius:var(--r);padding:20px 24px;margin:0 0 26px}
.toc h2{font-size:18px;margin:0 0 10px;color:var(--gold2)}
.toc ol{margin:0;padding-left:20px}
.toc a{color:#D9E2F5}
.toc a:hover{color:var(--gold2)}

/* grid + cards */
.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.card h3{margin:12px 0 8px;font-size:18px}
.card p{margin:0;color:var(--muted);font-size:15.5px}
.card-link{display:block;color:var(--text);transition:border-color .15s,transform .15s}
.card-link:hover{text-decoration:none;border-color:var(--gold);transform:translateY(-2px)}
.card-icon{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;
  background:var(--panel2);border:1px solid var(--line2);color:var(--gold);font-size:20px;font-weight:800}
.card-go{display:inline-block;margin-top:12px;color:var(--gold2);font-weight:700;font-size:15px}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:6px 0 22px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:18px;text-align:center}
.stat b{display:block;font-size:27px;color:var(--gold);font-weight:800;line-height:1.3}
.stat span{font-size:14px;color:var(--muted)}

/* table */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);margin:0 0 22px;background:var(--panel)}
table.tbl{width:100%;border-collapse:collapse;font-size:15.5px;min-width:560px}
table.tbl th,table.tbl td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
table.tbl th{background:var(--panel2);color:var(--gold2);font-weight:700;white-space:nowrap}
table.tbl tr:last-child td{border-bottom:0}
table.tbl td:first-child{color:#fff;font-weight:600}

/* figures */
.figure{margin:24px 0;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--panel)}
.figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
.figure figcaption{padding:12px 16px;font-size:14px;color:var(--muted);border-top:1px solid var(--line)}
.fig-2{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:24px 0}
.fig-2 .figure{margin:0}

/* steps */
.steps{list-style:none;padding:0;counter-reset:s;margin:0 0 22px}
.steps li{counter-increment:s;position:relative;padding:0 0 18px 58px;margin:0;color:#D6DEEE}
.steps li:before{content:counter(s);position:absolute;left:0;top:0;width:38px;height:38px;border-radius:50%;
  background:var(--gold);color:#1A1206;font-weight:800;display:flex;align-items:center;justify-content:center}
.steps b{display:block;color:#fff;font-size:17px;margin-bottom:2px}

/* faq */
.faq{display:grid;gap:12px;margin:0 0 22px}
.faq details{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:0}
.faq summary{cursor:pointer;padding:17px 52px 17px 20px;font-weight:700;color:#fff;position:relative;list-style:none;font-size:17px;line-height:1.6}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);
  width:26px;height:26px;border-radius:8px;background:var(--panel2);color:var(--gold);display:flex;align-items:center;justify-content:center;font-weight:800}
.faq details[open] summary:after{content:"–"}
.faq details[open] summary{border-bottom:1px solid var(--line)}
.faq .ans{padding:16px 20px 20px;color:#CBD6EA}
.faq .ans p:last-child{margin-bottom:0}

/* note / cta */
.note{background:var(--panel);border:1px solid var(--line);border-left:4px solid var(--red);border-radius:var(--r);padding:18px 22px;font-size:15.5px;color:#C7D2E8;margin:0 0 22px}
.note p:last-child{margin-bottom:0}
.cta-bar{background:linear-gradient(135deg,#1A2440,#101728);border:1px solid var(--line2);border-radius:var(--r2);
  padding:30px;text-align:center;margin:8px 0 0}
.cta-bar h2{font-size:clamp(20px,2.4vw,27px);margin:0 0 10px;color:#fff;border:0;padding:0}
.cta-bar p{color:var(--muted);max-width:720px;margin:0 auto 20px}
.cta-bar .hero-cta{justify-content:center;margin-bottom:0}
.meta-line{margin-top:30px;padding-top:16px;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}
.meta-line p{margin:0 0 6px}

/* footer */
.site-foot{background:#080C18;border-top:1px solid var(--line);padding:48px 0 20px;margin-top:20px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.25fr;gap:30px}
.foot-brand p{color:var(--muted);font-size:15px;margin:14px 0 12px}
.foot-meta{font-size:14.5px}
.site-foot h4{color:#fff;font-size:16px;margin:0 0 12px}
.foot-list{list-style:none;padding:0;margin:0}
.foot-list li{margin:7px 0}
.foot-list a{color:var(--muted);font-size:15px}
.foot-list a:hover{color:var(--gold2)}
.foot-bottom{border-top:1px solid var(--line);margin-top:32px;padding-top:18px;font-size:14px;color:var(--muted)}
.foot-bottom p{margin:0 0 10px}

/* sticky + top */
.sticky-bar{position:fixed;left:0;right:0;bottom:0;z-index:45;background:rgba(9,13,24,.96);border-top:1px solid var(--line2);
  backdrop-filter:blur(8px);transform:translateY(120%);transition:transform .25s;padding:10px 0}
.sticky-bar.on{transform:none}
.sticky-in{max-width:var(--wrap);margin:0 auto;padding:0 18px;display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:center}
.sticky-in p{margin:0;font-size:15px;color:#D6DEEE}
.sticky-x{position:absolute;right:12px;top:8px;background:none;border:0;color:var(--muted);font-size:22px;cursor:pointer;line-height:1}
#toTop{position:fixed;right:18px;bottom:86px;z-index:44;width:44px;height:44px;border-radius:50%;border:1px solid var(--line2);
  background:var(--panel);color:var(--text);font-size:18px;cursor:pointer;opacity:0;pointer-events:none;transition:opacity .2s}
#toTop.on{opacity:1;pointer-events:auto}

@media(max-width:1000px){
  .hero .wrap{grid-template-columns:1fr}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-2{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;background:#0C1223;border-bottom:1px solid var(--line2);
    flex-direction:column;align-items:stretch;padding:12px;gap:4px}
  .nav.open{display:flex}
  .nav-toggle{display:block}
  .nav-cta{margin:8px 0 0;flex-direction:column}
  .nav>a{padding:12px}
}
@media(max-width:620px){
  .grid-3,.grid-4{grid-template-columns:1fr}
  .fig-2{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr}
  body{font-size:16.5px}
  .hero{padding:30px 0}
  section{padding:34px 0}
}