/* FangBook Help Center — dark theme, Kiefer Green accents */
:root {
  --bg: #0B0E0C;
  --card: #141816;
  --green: #2E7D5B;
  --green-bright: #3fa37a;
  --text: #e8f0ea;
  --muted: #9db3a5;
  --border: #234034;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

.wrap { max-width: 860px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 18px 0;
  position: sticky;
  top: 0;
  background: rgba(11, 14, 12, 0.96);
  backdrop-filter: blur(6px);
  z-index: 10;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.brand { font-weight: 800; font-size: 1.25rem; letter-spacing: 0.5px; }
.brand .fang { color: var(--text); }
.brand .book { color: var(--green-bright); }
.brand small {
  display: block;
  font-weight: 400;
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 2px;
  text-transform: uppercase;
}
nav.main-nav { display: flex; gap: 8px; }
nav.main-nav a {
  color: var(--text);
  padding: 8px 16px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
}
nav.main-nav a:hover { background: var(--card); text-decoration: none; }
nav.main-nav a.active { background: var(--green); color: #fff; }

/* Hero */
.hero { text-align: center; padding: 56px 20px 36px; }
.hero h1 { font-size: 2.2rem; margin: 0 0 12px; }
.hero h1 .accent { color: var(--green-bright); }
.hero p { color: var(--muted); font-size: 1.1rem; margin: 0 auto; max-width: 600px; }

/* FAQ accordion */
.faq-list { display: flex; flex-direction: column; gap: 12px; padding-bottom: 24px; }
details.faq {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
details.faq summary {
  cursor: pointer;
  padding: 18px 20px;
  font-weight: 700;
  font-size: 1.02rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after {
  content: "+";
  color: var(--green-bright);
  font-size: 1.5rem;
  font-weight: 400;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}
details.faq[open] summary::after { transform: rotate(45deg); }
details.faq summary:hover { color: var(--green-bright); }
.faq-body { padding: 0 20px 20px; color: var(--text); }
.faq-body p { margin: 0 0 10px; }
.faq-body p:last-child { margin-bottom: 0; }
.faq-body ul { margin: 8px 0; padding-left: 22px; }
.faq-body li { margin-bottom: 6px; }

/* Guide cards */
.guide-grid { display: flex; flex-direction: column; gap: 18px; padding-bottom: 24px; }
.guide-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 26px;
}
.guide-card h2 { margin: 0 0 4px; font-size: 1.35rem; color: var(--green-bright); }
.guide-card .tagline { color: var(--muted); margin: 0 0 14px; font-size: 0.95rem; }
.guide-card h3 { font-size: 1rem; margin: 18px 0 8px; color: var(--text); }
.guide-card ul { margin: 0; padding-left: 22px; }
.guide-card li { margin-bottom: 8px; }
.guide-card li::marker { color: var(--green-bright); }

/* Support strip */
.support-strip {
  background: var(--card);
  border: 1px solid var(--green);
  border-radius: 12px;
  padding: 28px;
  text-align: center;
  margin: 12px 0 48px;
}
.support-strip h2 { margin: 0 0 8px; }
.support-strip p { color: var(--muted); margin: 0 0 16px; }
.btn {
  display: inline-block;
  background: var(--green);
  color: #fff !important;
  font-weight: 700;
  padding: 12px 28px;
  border-radius: 999px;
}
.btn:hover { background: var(--green-bright); text-decoration: none; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 0.9rem;
}
.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

@media (max-width: 560px) {
  .hero h1 { font-size: 1.7rem; }
  .guide-card { padding: 20px; }
  details.faq summary { padding: 15px 16px; font-size: 0.97rem; }
}