/* ============================================================
   Buddha — Hub CSS ("Cosmic Enlightenment")
   Theme: gold #daa520, ivory #faf8f0, deep indigo #0d1b3e, amber #c88a3c
   ============================================================ */

/* --- Design Tokens --- */
:root {
  --bd-dk: #0d1b3e;
  --bd-navy: #0f2045;
  --bd-midnight: #16265c;
  --bd-gold: #daa520;
  --bd-amber: #c88a3c;
  --bd-ivory: #faf8f0;
  --bd-linen: #ede4cc;
  --bd-stone: #9e9a8e;
  --bd-mut: #6b7a94;
}

/* --- Hero --- */
.bd-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--bd-dk);
  position: relative;
  overflow: hidden;
}
.bd-hero::before {
  content: '';
  position: absolute; inset: 0; z-index: 1;
  background:
    radial-gradient(ellipse at 50% 20%, rgba(218,165,32,0.12) 0%, transparent 55%),
    radial-gradient(ellipse at 35% 65%, rgba(200,138,60,0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 50%, rgba(218,165,32,0.03) 0%, transparent 40%);
}

/* Mandala geometry background */
.bd-mandala {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(circle at 50% 30%, rgba(218,165,32,0.04) 0%, transparent 28%),
    radial-gradient(circle at 50% 30%, rgba(218,165,32,0.03) 0%, transparent 18%),
    radial-gradient(circle at 50% 30%, rgba(218,165,32,0.02) 0%, transparent 8%);
  mask-image: radial-gradient(ellipse at 50% 30%, black 50%, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, black 50%, transparent 85%);
}

/* Floating lotus petals — pure CSS */
.bd-petals {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
}
.bd-petal {
  position: absolute;
  width: 8px; height: 14px;
  background: radial-gradient(ellipse at center, rgba(218,165,32,0.25) 0%, transparent 70%);
  border-radius: 50%;
  animation: bd-petal-float 12s linear infinite;
  opacity: 0;
}
@keyframes bd-petal-float {
  0% { transform: translateY(100vh) rotate(0deg) scale(0); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-10vh) rotate(720deg) scale(1.5); opacity: 0; }
}

.bd-hero-bg-img {
  position: absolute; inset: 0; z-index: 0;
}
.bd-hero-bg-img img {
  width: 100%; height: 100%; object-fit: cover; object-position: center 30%;
  opacity: 0.65;
  mask-image: radial-gradient(ellipse at 50% 30%, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, black 30%, transparent 70%);
}

.bd-hero-content {
  position: relative; z-index: 2; max-width: 600px;
}
.bd-hero-sigil {
  font-size: 3rem; margin-bottom: 16px;
  animation: bd-glow-pulse 3s ease-in-out infinite;
}
@keyframes bd-glow-pulse {
  0%, 100% { text-shadow: 0 0 20px rgba(218,165,32,0.3); }
  50% { text-shadow: 0 0 50px rgba(218,165,32,0.7), 0 0 80px rgba(218,165,32,0.3); }
}
.bd-hero-kicker {
  font-family: 'Cinzel', serif;
  font-size: 0.75rem; letter-spacing: 8px; text-transform: uppercase;
  color: var(--bd-gold); margin-bottom: 12px;
}
.bd-hero-title {
  font-family: 'Cinzel', serif;
  font-size: clamp(2.5rem, 5.5vw, 4rem); font-weight: 700;
  color: var(--bd-ivory); margin-bottom: 8px;
  text-shadow: 0 0 60px rgba(218,165,32,0.3);
}
.bd-hero-name-zh {
  font-family: 'Ma Shan Zheng', 'Noto Serif SC', serif;
  font-size: 2rem; color: var(--bd-gold); opacity: 0.7;
  margin-bottom: 16px;
}
.bd-hero-divider {
  width: 80px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--bd-gold), transparent);
  margin: 0 auto 16px;
}
.bd-hero-tagline {
  font-size: 0.95rem; line-height: 1.9; color: var(--bd-stone);
  max-width: 500px; margin: 0 auto;
}
.bd-hero-tagline strong { color: var(--bd-gold); }

/* Scroll hint */
.bd-scroll-hint {
  position: absolute; bottom: 36px; left: 50%; z-index: 2;
  transform: translateX(-50%);
}
.bd-scroll-hint span {
  display: block; width: 20px; height: 20px;
  border-right: 1px solid var(--bd-gold);
  border-bottom: 1px solid var(--bd-gold);
  transform: rotate(45deg);
  animation: scroll-bob 2s ease-in-out infinite;
  opacity: 0.4;
}

/* --- Nav --- */
.bd-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 18px 28px;
  background: linear-gradient(180deg, rgba(13,27,62,0.95) 0%, rgba(13,27,62,0) 100%);
  pointer-events: none;
}
.bd-nav a {
  pointer-events: auto; color: var(--bd-mut); text-decoration: none;
  font-size: 0.85rem; letter-spacing: 2px; text-transform: uppercase;
  font-family: 'Cinzel', serif; transition: color 0.3s;
}
.bd-nav a:hover { color: var(--bd-gold); }

/* --- Identity Cards --- */
.bd-identity-section {
  padding: var(--space-xxl) 0; background: var(--bd-navy);
}
.bd-identity-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 20px; max-width: 880px; margin: 0 auto; padding: 0 24px;
}
.bd-id-card {
  text-align: center; padding: 28px 16px;
  background: rgba(218,165,32,0.03);
  border: 1px solid rgba(218,165,32,0.06);
  border-radius: 4px;
  transition: border-color 0.3s, transform 0.3s;
}
.bd-id-card:hover {
  border-color: rgba(218,165,32,0.2);
  transform: translateY(-4px);
}
.bd-id-label {
  font-size: 0.65rem; letter-spacing: 3px;
  text-transform: uppercase; color: var(--bd-amber);
  margin-bottom: 8px;
}
.bd-id-value {
  font-family: 'Cinzel', serif;
  font-size: 0.95rem; color: var(--bd-ivory);
}

/* --- Insight Fragments --- */
.bd-insights-section {
  padding: var(--space-xxl) 0; background: var(--bd-dk);
}
.bd-insight {
  max-width: 620px; margin: 0 auto; padding: 28px 24px;
  text-align: center;
  border-bottom: 1px solid rgba(218,165,32,0.06);
}
.bd-insight:last-child { border-bottom: none; }
.bd-insight-icon { font-size: 1.8rem; margin-bottom: 8px; }
.bd-insight h3 {
  font-family: 'Cinzel', serif; font-size: 1.05rem;
  color: var(--bd-gold); margin-bottom: 8px;
}
.bd-insight p {
  font-size: 0.93rem; line-height: 1.8; color: var(--bd-stone);
}

/* --- Hub Cards — Sutra Scroll Style --- */
.bd-hub-section {
  padding: var(--space-xxl) 0; background: var(--bd-navy);
}
.bd-scrolls {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px; max-width: 900px; margin: 0 auto; padding: 0 24px;
}
.bd-scroll {
  display: flex; flex-direction: column;
  background: rgba(218,165,32,0.03);
  border: 1px solid rgba(218,165,32,0.07);
  border-radius: 3px;
  padding: 32px 24px; text-decoration: none;
  transition: border-color 0.3s, transform 0.3s;
  position: relative; overflow: hidden;
}
.bd-scroll::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--bd-gold), transparent);
  opacity: 0; transition: opacity 0.3s;
}
.bd-scroll:hover {
  border-color: rgba(218,165,32,0.25);
  transform: translateY(-6px);
}
.bd-scroll:hover::before { opacity: 1; }
.bd-scroll-icon { font-size: 2rem; margin-bottom: 14px; }
.bd-scroll h3 {
  font-family: 'Cinzel', serif; font-size: 1.05rem;
  color: var(--bd-ivory); margin-bottom: 8px;
}
.bd-scroll p {
  font-size: 0.85rem; line-height: 1.7; color: var(--bd-stone);
  flex: 1; margin-bottom: 14px;
}
.bd-scroll-link {
  font-family: 'Cinzel', serif; font-size: 0.7rem;
  letter-spacing: 3px; text-transform: uppercase;
  color: var(--bd-gold);
}

/* --- Section title override --- */
.bd-title {
  text-align: center; margin-bottom: 48px;
  font-family: 'Cinzel', serif; font-size: 1.5rem;
  color: var(--bd-ivory);
}
.bd-title .title-ornament {
  display: inline-block; width: 40px; height: 1px;
  background: var(--bd-gold); vertical-align: middle;
  margin: 0 16px; opacity: 0.5;
}

@media(max-width: 767px) {
  .bd-identity-grid { grid-template-columns: repeat(2, 1fr); }
  .bd-scrolls { grid-template-columns: 1fr; }
}