:root {
  --bg: #0b111c;
  --bg-2: #101a2a;
  --card: rgba(255, 255, 255, 0.045);
  --line: rgba(255, 255, 255, 0.10);
  --text: #e9eef6;
  --muted: #9aa7b8;
  --cyan: #4dd0e1;
  --orange: #ff8a3d;
  --gold: #ffc94a;
  --radius: 18px;
  --max: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(77, 208, 225, 0.16), transparent 60%),
    radial-gradient(900px 500px at 100% 10%, rgba(255, 138, 61, 0.13), transparent 60%),
    var(--bg);
  color: var(--text);
  font: 16px/1.65 "Inter", "Noto Sans Thai", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Thai / English: only the active language shows. */
html[data-lang="en"] [lang="th"],
html[data-lang="th"] [lang="en"] { display: none !important; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* ---- header ---- */
header.top {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(11, 17, 28, 0.72);
  border-bottom: 1px solid var(--line);
}
header.top .wrap { display: flex; align-items: center; gap: 14px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 800; letter-spacing: 0.02em; }
.brand:hover { text-decoration: none; }
.brand img { width: 34px; height: 34px; border-radius: 9px; }
nav.links { margin-left: auto; display: flex; gap: 18px; align-items: center; font-size: 14px; }
nav.links a { color: var(--muted); }
nav.links a:hover { color: var(--text); text-decoration: none; }
.lang {
  border: 1px solid var(--line); background: var(--card); color: var(--text);
  border-radius: 999px; padding: 5px 12px; font: inherit; font-size: 13px; cursor: pointer;
}
.lang:hover { border-color: var(--cyan); }

/* ---- hero ---- */
.hero { padding: 72px 0 40px; }
.hero .wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: center; }
.eyebrow { color: var(--cyan); font-size: 13px; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase; }
.hero h1 { font-size: clamp(36px, 5.4vw, 60px); line-height: 1.05; margin: 12px 0 16px; letter-spacing: -0.02em; }
.hero h1 .glow {
  background: linear-gradient(90deg, var(--cyan), #c7f6ff 45%, var(--orange));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lead { color: var(--muted); font-size: 18px; max-width: 34em; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 20px; border-radius: 14px; font-weight: 700; font-size: 15px;
  border: 1px solid var(--line); background: var(--card); color: var(--text);
}
.btn:hover { text-decoration: none; border-color: var(--cyan); }
.btn.primary { background: linear-gradient(90deg, #22b8cc, #4dd0e1); color: #062027; border: 0; }
.btn.primary[aria-disabled="true"] { opacity: 0.85; cursor: default; }
.btn small { display: block; font-weight: 600; font-size: 11px; opacity: 0.75; letter-spacing: 0.06em; text-transform: uppercase; }
.hero-art { position: relative; }
.hero-art img {
  width: 100%; height: auto; border-radius: 28px; display: block;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55), 0 0 0 1px var(--line);
}
.hero-art::before {
  content: ""; position: absolute; inset: -10%; z-index: -1;
  background: radial-gradient(closest-side, rgba(77, 208, 225, 0.35), transparent);
  filter: blur(30px);
}

/* ---- sections ---- */
section { padding: 56px 0; }
h2 { font-size: clamp(26px, 3.4vw, 36px); margin: 0 0 8px; letter-spacing: -0.01em; }
.sub { color: var(--muted); margin: 0 0 30px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px;
}
.card h3 { margin: 10px 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.icon {
  width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center;
  background: rgba(77, 208, 225, 0.12); color: var(--cyan); font-size: 20px;
}
.icon.orange { background: rgba(255, 138, 61, 0.12); color: var(--orange); }
.icon.gold { background: rgba(255, 201, 74, 0.12); color: var(--gold); }

.steps { counter-reset: s; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.step { position: relative; padding-top: 44px; }
.step::before {
  counter-increment: s; content: counter(s);
  position: absolute; top: 0; left: 0; width: 32px; height: 32px; border-radius: 50%;
  display: grid; place-items: center; font-weight: 800; color: #062027;
  background: linear-gradient(135deg, var(--cyan), var(--orange));
}
.step h3 { margin: 0 0 4px; font-size: 17px; }
.step p { margin: 0; color: var(--muted); font-size: 15px; }

.note {
  border: 1px solid rgba(255, 201, 74, 0.35); background: rgba(255, 201, 74, 0.06);
  border-radius: var(--radius); padding: 16px 20px; color: #f3e2b6; font-size: 15px;
}

/* ---- documents (privacy, deletion) ---- */
.doc { max-width: 780px; padding: 48px 20px 72px; margin: 0 auto; }
.doc h1 { font-size: clamp(30px, 4vw, 42px); margin: 0 0 6px; letter-spacing: -0.01em; }
.doc .updated { color: var(--muted); margin: 0 0 28px; font-size: 14px; }
.doc h2 { font-size: 22px; margin: 34px 0 8px; }
.doc h3 { font-size: 17px; margin: 20px 0 6px; color: var(--cyan); }
.doc p, .doc li { color: #cfd7e3; }
.doc ul { padding-left: 22px; }
.doc li { margin: 4px 0; }
.doc table { width: 100%; border-collapse: collapse; margin: 10px 0 18px; font-size: 14px; }
.doc th, .doc td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.doc th { color: var(--muted); font-weight: 600; }
.doc .card { margin: 18px 0; }

/* ---- footer ---- */
footer { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 14px 24px; align-items: center; }
footer .links { display: flex; flex-wrap: wrap; gap: 18px; margin-left: auto; }
footer a { color: var(--muted); }

/* Key numbers under the hero buttons. */
.facts { list-style: none; display: grid; grid-template-columns: repeat(4, auto); justify-content: start; gap: 10px 26px; padding: 0; margin: 28px 0 0; }
.facts li { display: flex; flex-direction: column; color: var(--muted); font-size: 13px; }
.facts b { color: var(--text); font-size: 26px; font-weight: 800; line-height: 1.1; }

/* FAQ: native <details>, styled like the cards. */
.faq { display: grid; gap: 10px; max-width: 820px; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 18px; }
.faq summary { cursor: pointer; font-weight: 700; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--cyan); font-weight: 800; }
.faq details[open] summary::after { content: "–"; }
.faq details p { color: var(--muted); margin: 10px 0 0; font-size: 15px; }

@media (max-width: 860px) {
  .hero { padding-top: 40px; }
  .hero .wrap { grid-template-columns: 1fr; }
  .hero-art { max-width: 420px; }
  .grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  nav.links a.hide-sm { display: none; }
}
@media (max-width: 560px) {
  .grid, .steps { grid-template-columns: 1fr; }
  .facts { grid-template-columns: repeat(2, auto); }
  footer .links { margin-left: 0; }
}