/* Tài Giỏi website, "Sơn Mài" style (matches the app). */
:root {
  --bg: #FBF7EF;
  --surface: #FFFFFF;
  --border: #E9DFCC;
  --ink: #1C1917;
  --muted: #6B5E4F;
  --primary: #A61B1B;
  --primary-dark: #7D1414;
  --on-primary: #FFF8EC;
  --gold: #B8902F;
  --gold-text: #86661C;
  --gold-light: #F3D27A;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}
a { color: var(--primary); }
a:hover { color: var(--primary-dark); }
.wrap { max-width: 880px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { border-bottom: 1px solid var(--border); background: var(--bg); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 68px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 700; font-size: 20px; }
.brand img { width: 32px; height: 32px; }
.lang { display: flex; gap: 4px; background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: 3px; }
.lang a { min-width: 44px; padding: 6px 12px; border-radius: 999px; text-align: center; text-decoration: none; font-size: 13px; font-weight: 600; color: var(--muted); }
.lang a[aria-current="true"] { background: var(--primary); color: var(--on-primary); }

/* Hero */
.hero { background: var(--primary); color: var(--on-primary); position: relative; overflow: hidden; }
.hero .wrap { padding-top: 64px; padding-bottom: 64px; position: relative; }
.hero h1 { font-size: clamp(32px, 6vw, 48px); line-height: 1.15; margin: 0 0 16px; max-width: 18ch; }
.hero p { font-size: 18px; margin: 0 0 28px; max-width: 46ch; color: #F6DCD7; }
.hero .lanterns { position: absolute; right: 20px; top: 0; width: 180px; height: auto; }
@media (max-width: 640px) { .hero .lanterns { width: 110px; opacity: 0.85; } }
.btn { display: inline-flex; align-items: center; min-height: 48px; padding: 0 22px; border-radius: 14px; font-weight: 700; text-decoration: none; }
.btn-light { background: var(--on-primary); color: var(--primary); border: 2px solid var(--gold-light); }
.btn-light:hover { color: var(--primary-dark); }

/* Sections */
main { padding: 48px 0 64px; }
h1 { font-size: clamp(28px, 5vw, 36px); line-height: 1.2; margin: 0 0 12px; }
h2 { font-size: 24px; line-height: 1.3; margin: 40px 0 12px; }
h3 { font-size: 18px; margin: 28px 0 8px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-top: 20px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 20px; }
.card h3 { margin: 0 0 6px; }
.card p { margin: 0; color: var(--muted); }
.note { background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--gold); border-radius: 12px; padding: 16px 18px; margin: 20px 0; }
.legal p, .legal li { color: var(--ink); }
.legal ul, .legal ol { padding-left: 22px; }
.meta { color: var(--muted); font-size: 14px; }
.eyebrow { color: var(--gold-text); font-weight: 700; letter-spacing: 1px; text-transform: uppercase; font-size: 13px; margin: 0; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }