:root {
  --bg: #0b0e13;
  --bg2: #111827;
  --bg3: #161d2b;
  --gold: #facc15;
  --gold2: #fbbf24;
  --gold3: #b45309;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --line: #1f2937;
  --red: #dc2626;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: "Prompt", "Sarabun", system-ui, -apple-system, sans-serif;
  font-size: 16px; line-height: 1.75;
  padding-bottom: 68px; /* footerbar */
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--gold); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- topbar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 60; display: flex; align-items: center;
  gap: 14px; padding: 8px 16px; background: rgba(11,14,19,.96);
  border-bottom: 1px solid var(--line); backdrop-filter: blur(6px);
}
.topbar .logo { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }
.topbar .logo img { height: 38px; width: auto; }
.topbar nav { display: flex; gap: 4px; flex-wrap: wrap; flex: 1 1 auto; }
.topbar nav a {
  color: var(--text); font-size: 14px; padding: 6px 10px; border-radius: 8px;
  white-space: nowrap;
}
.topbar nav a:hover { background: var(--bg3); color: var(--gold); text-decoration: none; }
.topbar nav a.active { color: var(--gold); }
.top-cta { display: flex; gap: 8px; flex: 0 0 auto; }
.btn {
  display: inline-block; border-radius: 8px; padding: 8px 14px; font-size: 14px;
  font-weight: 600; color: #111; background: linear-gradient(180deg,var(--gold),var(--gold2));
  border: 1px solid #a16207; white-space: nowrap;
}
.btn:hover { filter: brightness(1.08); text-decoration: none; }
.btn.alt { background: linear-gradient(180deg,#f87171,var(--red)); color: #fff; border-color: #7f1d1d; }
.btn.ghost { background: transparent; color: var(--gold); border: 1px solid var(--gold3); }
.nav-toggle { display: none; }

/* ---------- hero ---------- */
.hero-img { width: 100%; max-height: 420px; object-fit: cover; border-bottom: 1px solid var(--line); }
.sec-img { width: 100%; border-radius: 12px; margin: 18px 0; border: 1px solid var(--line); }

/* ---------- content ---------- */
.wrap { max-width: 980px; margin: 0 auto; padding: 22px 16px 60px; }
h1 { font-size: clamp(22px, 3.4vw, 36px); color: #fff; margin: 18px 0 12px; line-height: 1.3; }
h2 { color: var(--gold); font-size: clamp(19px, 2.2vw, 26px); margin: 30px 0 12px; line-height: 1.35; }
h3 { color: #fff; font-size: clamp(17px, 1.8vw, 21px); margin: 22px 0 10px; }
p { margin: 0 0 14px; }
ul, ol { margin: 0 0 16px 22px; padding: 0; }
li { margin-bottom: 6px; }
.toc { background: var(--bg2); border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; }
.toc ul { list-style: none; margin: 0; padding-left: 0; }
.toc li { margin: 4px 0; }
.toc li::before { content: "▸ "; color: var(--gold); }

table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 15px; display: table; }
th, td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; vertical-align: top; }
th { background: var(--bg3); color: var(--gold); font-weight: 600; }
tr:nth-child(even) td { background: rgba(255,255,255,.02); }

.quick-facts { background: var(--bg2); border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; margin: 18px 0; }
.quick-facts ul { list-style: none; margin: 0; padding: 0; }
.quick-facts li { padding: 4px 0; }
.quick-facts li::before { content: "★ "; color: var(--gold); }

.cta-box {
  background: linear-gradient(180deg, rgba(250,204,21,.12), rgba(250,204,21,.04));
  border: 1px solid var(--gold3); border-radius: 14px; padding: 18px 20px; margin: 22px 0;
  text-align: center;
}
.cta-box .cta-text { font-size: 17px; font-weight: 600; color: #fff; margin-bottom: 12px; }
.cta-box .btn { font-size: 16px; padding: 10px 22px; margin: 0 5px; }

.step-item { background: var(--bg2); border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px; margin: 10px 0; }
.step-item .step-title { font-weight: 600; color: var(--gold); }
.step-item .step-desc { color: var(--muted); font-size: 15px; }
.step-item .step-time { color: #86efac; font-size: 14px; }

.card-desc { color: var(--muted); font-size: 15px; margin-bottom: 8px; }
.article-note { color: #6b7280; font-size: 13px; border-top: 1px dashed var(--line); padding-top: 10px; }

.faq-item { background: var(--bg2); border: 1px solid var(--line); border-radius: 10px; margin: 10px 0; }
.faq-item summary, .faq-item .faq-q {
  cursor: pointer; padding: 12px 16px; font-weight: 600; color: #fff; list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::before, .faq-item .faq-q::before { content: "❓ "; }
.faq-item .faq-answer { padding: 0 16px 12px; color: var(--text); }
.faq-item .faq-answer p { margin: 0 0 8px; }

/* ---------- footerbar (mobile sticky CTA) ---------- */
.footerbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 90; display: flex;
  background: rgba(11,14,19,.97); border-top: 1px solid var(--gold3);
  backdrop-filter: blur(6px);
}
.footerbar a {
  flex: 1; text-align: center; padding: 13px 6px; font-weight: 700; font-size: 15px;
  color: #111; letter-spacing: .2px;
}
.footerbar a.reg { background: linear-gradient(180deg,var(--gold),var(--gold2)); }
.footerbar a.enter { background: linear-gradient(180deg,#f87171,var(--red)); color: #fff; }
.footerbar a:hover { filter: brightness(1.1); text-decoration: none; }

/* ---------- footer ---------- */
footer.site { border-top: 1px solid var(--line); background: var(--bg2); padding: 26px 16px 90px; }
footer.site .inner { max-width: 980px; margin: 0 auto; }
footer.site h3 { color: var(--gold); font-size: 16px; margin: 0 0 10px; }
footer.site .links { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 14px; margin-bottom: 14px; }
footer.site .copy { color: #6b7280; font-size: 13px; }
footer.site .brandline { color: var(--muted); font-size: 14px; margin-bottom: 12px; }

@media (max-width: 860px) {
  .topbar { flex-wrap: wrap; }
  .topbar nav { order: 3; width: 100%; display: none; overflow-x: auto; }
  .topbar.open nav { display: flex; }
  .nav-toggle { display: inline-block; background: transparent; border: 1px solid var(--gold3);
    color: var(--gold); border-radius: 8px; padding: 6px 10px; font-size: 14px; }
  .top-cta .btn { padding: 7px 10px; font-size: 13px; }
  table { font-size: 13px; }
  th, td { padding: 7px 8px; }
}