/* FortuneAI brand site — design tokens & shared components.
   Source of truth: /DESIGN.md at repo root. Do not deviate without updating that file too. */

:root {
  --ink: #1B1815;
  --ink-2: #26221D;
  --ink-3: #322C25;
  --paper: #F7F3EC;
  --paper-2: #EFE8DA;
  --seal: #C22E26;
  --seal-deep: #8F2018;
  --seal-bright: #D93A31;
  --gold: #A6813C;
  --gold-soft: #C9A968;
  --ink-muted: #9C9188;
  --paper-muted: #6B6259;
  --paper-text: #211D19;

  --font-serif: 'Noto Serif TC', serif;
  --font-sans: 'Noto Sans TC', sans-serif;
  --font-display: 'Fraunces', serif;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;
  --space-8: 128px;

  --max-width: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--ink);
  color: var(--paper);
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--seal); color: var(--paper); }

.wrap { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-3); }
@media (max-width: 640px) { .wrap { padding: 0 var(--space-2); } }

h1, h2, h3 { font-family: var(--font-serif); text-wrap: balance; margin: 0; }

a { color: inherit; }

/* ---------- top nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(27,24,21,0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(166,129,60,0.22);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-2) 0;
}
.wordmark {
  font-family: var(--font-display);
  font-weight: 600; font-size: 20px; letter-spacing: 0.01em;
  color: var(--paper); text-decoration: none;
}
.wordmark span { color: var(--seal-bright); }
.nav-links { display: flex; gap: var(--space-4); font-size: 14px; color: var(--ink-muted); }
.nav-links a { text-decoration: none; white-space: nowrap; }
.nav-links a:hover { color: var(--paper); }
.nav-inner .btn { white-space: nowrap; flex-shrink: 0; }
@media (max-width: 720px) {
  .nav-links { display: none; }
}

/* ---------- section label ---------- */
.section-label {
  font-family: var(--font-sans); font-size: 12px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--gold-soft);
  margin-bottom: var(--space-2); display: block;
}

/* ---------- hexagram motif ---------- */
.hexagram { display: flex; flex-direction: column; gap: 10px; width: 96px; }
.hexagram .line { height: 8px; display: flex; gap: 10px; }
.hexagram .line .bar { flex: 1; background: var(--gold); border-radius: 1px; }
.hexagram .line.broken .bar { flex: 0 0 calc(50% - 5px); }
.hexagram.large { width: 240px; gap: 22px; }
.hexagram.large .line { height: 16px; gap: 22px; }
.hexagram.large .line.broken .bar { flex: 0 0 calc(50% - 11px); }
.hexagram.dim .bar { opacity: 0.5; }
.hexagram.small { width: 56px; gap: 6px; }
.hexagram.small .line { height: 5px; gap: 6px; }
.hexagram.small .line.broken .bar { flex: 0 0 calc(50% - 3px); }

/* ---------- hero ---------- */
.hero {
  position: relative; padding: var(--space-8) 0 var(--space-7); overflow: hidden;
  background: radial-gradient(ellipse 900px 500px at 82% -10%, rgba(194,46,38,0.16), transparent 60%), var(--ink);
}
.hero-bg-hex { position: absolute; right: -60px; top: 50%; transform: translateY(-50%) rotate(-6deg); opacity: 0.9; }
.hero-inner { position: relative; max-width: 620px; }
.eyebrow {
  font-family: var(--font-sans); font-size: 13px; letter-spacing: 0.14em;
  color: var(--gold-soft); text-transform: uppercase; margin-bottom: var(--space-3);
  display: flex; align-items: center; gap: 10px;
}
.eyebrow::before { content: ''; width: 28px; height: 1px; background: var(--gold-soft); display: inline-block; }
.hero h1 { font-size: clamp(38px, 6vw, 64px); font-weight: 700; line-height: 1.22; color: var(--paper); }
.hero h1 em { font-style: normal; color: var(--seal-bright); }
.hero-sub { font-family: var(--font-sans); font-weight: 300; font-size: 18px; line-height: 1.75; color: var(--ink-muted); margin-top: var(--space-3); max-width: 480px; }
.hero-actions { display: flex; gap: var(--space-2); margin-top: var(--space-5); flex-wrap: wrap; }

/* ---------- buttons ---------- */
.btn {
  font-family: var(--font-sans); font-size: 15px; font-weight: 500;
  padding: 14px 30px; border-radius: 2px; border: 1px solid transparent;
  cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 8px;
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--seal); color: var(--paper); }
.btn-primary:hover { background: var(--seal-bright); }
.btn-secondary { background: transparent; color: var(--paper); border-color: rgba(247,243,236,0.3); }
.btn-secondary:hover { border-color: rgba(247,243,236,0.6); }

/* ---------- trust strip ---------- */
.trust { padding: var(--space-7) 0; background: var(--ink-2); border-top: 1px solid rgba(166,129,60,0.15); border-bottom: 1px solid rgba(166,129,60,0.15); }
.trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
@media (max-width: 800px) { .trust-grid { grid-template-columns: 1fr; gap: var(--space-4); } }
.trust-item { border-left: 1px solid rgba(166,129,60,0.35); padding-left: var(--space-3); }
.trust-item h3 { font-size: 21px; color: var(--paper); font-weight: 600; margin-bottom: 10px; }
.trust-item p { font-size: 15px; line-height: 1.8; color: var(--ink-muted); margin: 0; font-weight: 300; }

/* ---------- testimonial ---------- */
.testimonial { padding: var(--space-7) 0; }
.quote { font-family: var(--font-serif); font-size: clamp(22px, 3vw, 30px); line-height: 1.65; color: var(--paper); max-width: 780px; font-weight: 400; }
.quote-mark { color: var(--seal-bright); font-family: var(--font-display); font-size: 48px; line-height: 0.5; display: block; margin-bottom: 18px; }
.quote-attr { margin-top: var(--space-3); font-size: 14px; color: var(--gold-soft); letter-spacing: 0.04em; }

/* ---------- pricing / plans ---------- */
.plans { padding: var(--space-7) 0; }
.plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); margin-top: var(--space-4); }
@media (max-width: 800px) { .plan-grid { grid-template-columns: 1fr; } }
.plan-card { border: 1px solid rgba(166,129,60,0.22); border-radius: 3px; padding: var(--space-4); background: var(--ink-2); }
.plan-card.featured { border-color: var(--seal); background: var(--ink-3); }
.plan-name { font-family: var(--font-sans); font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--gold-soft); }
.plan-price { font-family: var(--font-display); font-size: 40px; font-weight: 600; color: var(--paper); margin: var(--space-2) 0; font-variant-numeric: tabular-nums; }
.plan-price small { font-family: var(--font-sans); font-size: 14px; color: var(--ink-muted); font-weight: 400; }
.plan-desc { font-size: 14px; color: var(--ink-muted); line-height: 1.8; font-weight: 300; margin-bottom: var(--space-3); }

/* ---------- FAQ ---------- */
.faq { padding: var(--space-7) 0; }
.faq-item { border-top: 1px solid rgba(166,129,60,0.18); padding: var(--space-3) 0; }
.faq-item:last-child { border-bottom: 1px solid rgba(166,129,60,0.18); }
.faq-item summary { cursor: pointer; font-family: var(--font-serif); font-size: 18px; color: var(--paper); list-style: none; display: flex; justify-content: space-between; align-items: center; gap: var(--space-2); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-family: var(--font-display); font-size: 24px; color: var(--gold-soft); flex-shrink: 0; }
.faq-item[open] summary::after { content: '−'; }
.faq-item p { font-size: 15px; line-height: 1.85; color: var(--ink-muted); font-weight: 300; margin: var(--space-2) 0 0; max-width: 720px; }

/* ---------- footer ---------- */
footer { background: var(--ink); padding: var(--space-6) 0 var(--space-4); border-top: 1px solid rgba(166,129,60,0.18); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--space-4); }
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-col h5 { font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--gold-soft); font-weight: 500; margin: 0 0 var(--space-2); }
.footer-col a { display: block; font-size: 14px; color: var(--ink-muted); text-decoration: none; margin-bottom: 10px; }
.footer-col a:hover { color: var(--paper); }
.footer-bottom { margin-top: var(--space-6); padding-top: var(--space-3); border-top: 1px solid rgba(166,129,60,0.12); display: flex; justify-content: space-between; font-size: 12px; color: var(--ink-muted); flex-wrap: wrap; gap: 10px; }

/* ---------- legal document pages ---------- */
.legal-hero { background: var(--paper); color: var(--paper-text); padding: var(--space-6) 0 var(--space-4); }
.legal-hero .eyebrow { color: var(--seal-deep); }
.legal-hero .eyebrow::before { background: var(--seal-deep); }
.legal-hero h1 { color: var(--paper-text); font-size: clamp(28px, 4vw, 40px); }
.legal-hero .updated { font-size: 13px; color: var(--paper-muted); margin-top: var(--space-2); }

.legal-body-section { background: var(--paper); color: var(--paper-text); padding-bottom: var(--space-7); }
.legal-doc { display: grid; grid-template-columns: 240px 1fr; gap: var(--space-5); }
@media (max-width: 800px) { .legal-doc { grid-template-columns: 1fr; } }
.legal-toc { position: sticky; top: 84px; align-self: start; font-size: 13px; color: var(--paper-muted); line-height: 2.2; }
.legal-toc a { display: block; text-decoration: none; padding: 2px 0; }
.legal-toc a:hover { color: var(--seal-deep); }
.legal-article { margin-bottom: var(--space-5); scroll-margin-top: 90px; }
.legal-article h2 { font-size: 22px; color: var(--paper-text); margin-bottom: var(--space-3); padding-bottom: var(--space-1); border-bottom: 1px solid rgba(107,98,89,0.18); }
.legal-clause { margin-bottom: var(--space-2); display: flex; gap: 14px; }
.legal-clause .num { font-variant-numeric: tabular-nums; color: var(--seal-deep); font-weight: 600; font-size: 14px; flex-shrink: 0; padding-top: 2px; }
.legal-clause p, .legal-clause li { font-size: 15px; line-height: 1.9; color: #3A342D; margin: 0; font-weight: 400; }
.legal-clause ul { margin: 6px 0 0; padding-left: 18px; }
.legal-clause li { margin-bottom: 6px; }

/* ---------- theme toggle demo (optional, off by default in production) ---------- */
.theme-toggle {
  font-family: var(--font-sans); font-size: 12px; letter-spacing: 0.06em;
  color: var(--gold-soft); background: transparent; border: 1px solid rgba(166,129,60,0.4);
  padding: 6px 14px; border-radius: 2px; cursor: pointer;
}

section { scroll-margin-top: 70px; }