@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,600;1,400&family=Inter:wght@300;400;500;600&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&display=swap');

:root {
  /* Luxury Dark Mode Palette */
  --void: #0a0a0f;
  --surface: rgba(16, 16, 22, 0.6);
  --surface-solid: #121218;
  --surface-glass: rgba(255, 255, 255, 0.03);
  
  /* Accents */
  --gold: #c9a96e;
  --gold-light: #e6cd98;
  --gold-glow: rgba(201, 169, 110, 0.15);
  --gold-strong: rgba(201, 169, 110, 0.4);
  --rose: #e8b4b8;
  --rose-glow: rgba(232, 180, 184, 0.1);
  
  /* Text */
  --text: #f0ebe1;
  --text-muted: #8a867d;
  --text-dark: #3a3832;
  
  /* Structure */
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --border-glass: 1px solid rgba(255, 255, 255, 0.06);
  --border-gold: 1px solid rgba(201, 169, 110, 0.2);
  
  /* Dynamics */
  --shadow-glow: 0 0 40px rgba(201, 169, 110, 0.05);
  --shadow-card: 0 20px 40px rgba(0, 0, 0, 0.4);
  --transition-smooth: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  
  /* State */
  --scroll: 0;
  color-scheme: dark;
}

/* Base Reset & Typography */
* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; overflow-x: hidden; }

body {
  background-color: var(--void);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.01em;
  overflow-x: hidden;
  cursor: default;
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--void); }
::-webkit-scrollbar-thumb { background: rgba(201, 169, 110, 0.3); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: rgba(201, 169, 110, 0.6); }

/* Typography */
h1, h2, h3, .brand, .stat-card strong, .year-card strong, .participant-card strong {
  font-family: 'Playfair Display', serif;
  font-weight: 400;
}

h1 {
  font-size: clamp(3.5rem, 10vw, 7rem);
  line-height: 1;
  background: linear-gradient(135deg, #fff, var(--gold-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 24px;
}

h2 {
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.1;
  margin-bottom: 24px;
  color: var(--gold-light);
}

h3 {
  font-size: 1.2rem;
  letter-spacing: 0.05em;
  color: var(--gold);
  margin-bottom: 16px;
  text-transform: uppercase;
}

blockquote {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.4rem;
  font-style: italic;
  line-height: 1.5;
  color: var(--gold-light);
  border-left: 2px solid var(--gold-strong);
  padding-left: 20px;
  margin: 16px 0;
}

p { line-height: 1.7; color: var(--text-muted); }

/* Layout Globals */
.stats-strip, .chapter-shell, .closing {
  padding: clamp(60px, 10vw, 120px) clamp(24px, 6vw, 80px);
  position: relative;
  z-index: 2;
}

/* Preloader */
#preloader {
  position: fixed;
  inset: 0;
  background: var(--void);
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: opacity 1s ease-in-out, visibility 1s;
}
.monogram-loader {
  font-family: 'Playfair Display', serif;
  font-size: 3rem;
  color: var(--gold);
  animation: pulse-glow 2s infinite alternate;
}

/* Header */
.site-header {
  position: fixed;
  top: 0; width: 100%;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  padding: 24px clamp(24px, 6vw, 80px);
  background: rgba(10, 10, 15, 0.7);
  backdrop-filter: blur(20px);
  border-bottom: var(--border-glass);
}

.brand {
  font-size: 1.5rem;
  font-style: italic;
  color: var(--gold-light);
  text-decoration: none;
  display: flex; align-items: center; gap: 12px;
}

.brand-mark {
  width: 12px; height: 12px;
  background: var(--gold);
  border-radius: 50%;
  box-shadow: 0 0 15px var(--gold);
}

nav a {
  color: var(--text-muted);
  text-decoration: none;
  margin-left: 32px;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: var(--transition-smooth);
}
nav a:hover { color: var(--gold); }

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 0 clamp(24px, 6vw, 80px);
  overflow: hidden;
}

#canvas-container {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
}

.hero-content {
  position: relative; z-index: 2;
  max-width: 800px;
  padding-top: 80px;
}

.privacy-note, .section-kicker {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-bottom: 24px;
  display: inline-block;
  border: var(--border-gold);
  padding: 6px 16px;
  border-radius: 20px;
  background: var(--surface-glass);
}

.lede {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  font-family: 'Cormorant Garamond', serif;
  color: var(--text);
  min-height: 3em; /* space for typewriter */
}

/* Glassmorphism Cards */
.feature-panel, .stat-card, .quote-card, .memory-card, .year-card, .participant-card, .mini-card {
  background: var(--surface);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.feature-panel::before, .stat-card::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at top right, var(--gold-glow), transparent 60%);
  opacity: 0;
  transition: opacity 0.5s ease;
}

.feature-panel:hover::before, .stat-card:hover::before { opacity: 1; }
.feature-panel:hover, .stat-card:hover {
  transform: translateY(-5px);
  border-color: rgba(201, 169, 110, 0.3);
  box-shadow: var(--shadow-glow);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.stat-card strong {
  display: block;
  font-size: 3.5rem;
  color: var(--gold-light);
  margin: 16px 0 8px;
}

.stat-card span, .mini-card span {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

/* Tab Bar */
.tab-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 48px;
  background: var(--surface-solid);
  padding: 8px;
  border-radius: 40px;
  border: var(--border-glass);
  width: max-content;
  max-width: 100%;
  overflow-x: auto;
  position: sticky;
  top: 100px;
  z-index: 50;
  backdrop-filter: blur(20px);
}

.tab-button {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 12px 24px;
  border-radius: 30px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.tab-button.active {
  background: var(--gold);
  color: var(--void);
  box-shadow: 0 4px 15px var(--gold-strong);
}

.tab-panel { display: none; animation: fadeIn 0.8s ease forwards; }
.tab-panel.active { display: block; }

/* Grids & Layouts */
.story-grid, .split-grid, .rhythm-split, .memory-layout {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}
.wide { grid-column: 1 / -1; }

.chapter-timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}

.quad-grid, .language-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.motif-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Visualizations */
.line-chart { width: 100%; height: 400px; overflow: visible; }
.axis-label { fill: var(--text-muted); font-size: 12px; font-family: 'Inter'; }
.chart-grid-line { stroke: rgba(255,255,255,0.05); }

/* Heatmap */
.heatmap { display: grid; gap: 8px; }
.heatmap-row {
  display: grid;
  grid-template-columns: 40px repeat(24, 1fr);
  align-items: center; gap: 4px;
}
.heatmap-day { font-size: 0.75rem; color: var(--text-muted); }
.heat-cell {
  aspect-ratio: 1;
  border-radius: 4px;
  background: color-mix(in srgb, var(--gold) calc(var(--i) * 100%), var(--surface-glass));
  border: 1px solid rgba(255,255,255,0.02);
  transition: transform 0.3s ease;
}
.heat-cell:hover { transform: scale(1.5); z-index: 10; box-shadow: 0 0 10px var(--gold); }

/* Bars */
.bar-row { margin-bottom: 16px; }
.bar-top { display: flex; justify-content: space-between; margin-bottom: 8px; font-size: 0.9rem; }
.bar-track { height: 6px; background: rgba(255,255,255,0.05); border-radius: 3px; overflow: hidden; }
.bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--rose), var(--gold));
  transform-origin: left;
  transform: scaleX(0); /* animated in JS via class */
}
.bar-fill.drawn { animation: drawBar 1s cubic-bezier(0.16, 1, 0.3, 1) forwards; }

/* Chips */
.word-cloud { display: flex; flex-wrap: wrap; gap: 12px; }
.word-chip, .phrase-chip, .emoji-chip {
  background: var(--surface-glass);
  border: var(--border-glass);
  border-radius: 20px;
  padding: 8px 16px;
  color: var(--text);
  transition: var(--transition-smooth);
}
.word-chip:hover { border-color: var(--gold); background: rgba(201,169,110,0.1); }

.emoji-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(60px, 1fr)); gap: 12px; }
.emoji-chip { display: flex; flex-direction: column; align-items: center; padding: 12px; border-radius: var(--radius-md); }
.emoji-chip b { font-size: 2rem; margin-bottom: 4px; }
.emoji-chip span { font-size: 0.7rem; color: var(--text-muted); }

/* Memory Cards */
.memory-card {
  background: var(--surface-glass);
  border: var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease, border-color 0.4s;
}
.memory-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: linear-gradient(135deg, rgba(201,169,110,0.1) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.4s;
}
.memory-card:hover {
  transform: translateY(-8px) scale(1.01);
  box-shadow: 0 20px 40px rgba(0,0,0,0.5), 0 0 30px rgba(201,169,110,0.15);
  border-color: var(--gold);
}
.memory-card:hover::before { opacity: 1; }

/* Buttons & CTA */
.cta-section {
  text-align: center;
  padding: 120px 24px;
  background: radial-gradient(circle at center, rgba(201, 169, 110, 0.1), var(--void) 70%);
  border-top: var(--border-glass);
}
.button {
  display: inline-block;
  background: var(--gold);
  color: var(--void);
  padding: 16px 40px;
  border-radius: 40px;
  font-weight: 600;
  text-decoration: none;
  font-size: 1.1rem;
  transition: var(--transition-smooth);
  box-shadow: 0 10px 30px var(--gold-strong);
}
.button:hover { transform: translateY(-3px); box-shadow: 0 15px 40px var(--gold-strong); background: #d4b884; }

/* Reveal Animations */
.reveal { opacity: 0; transform: translateY(40px); transition: all 1s cubic-bezier(0.16, 1, 0.3, 1); }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* Path Animations */
path.line-path {
  stroke-dasharray: 4000;
  stroke-dashoffset: 4000;
}
path.line-path.drawn { animation: drawLine 2.5s cubic-bezier(0.16, 1, 0.3, 1) forwards; }

@keyframes drawLine { to { stroke-dashoffset: 0; } }
@keyframes drawBar { to { transform: scaleX(1); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes pulse-glow { from { opacity: 0.6; text-shadow: 0 0 10px var(--gold); } to { opacity: 1; text-shadow: 0 0 30px var(--gold); } }
@keyframes bounce { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(10px); } }

/* Cursor Glow */
#cursor-glow {
  position: fixed;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(201,169,110,0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s;
}

/* Media Queries */
@media (max-width: 1024px) {
  .story-grid, .split-grid, .rhythm-split, .memory-layout { grid-template-columns: 1fr; }
  .site-header { flex-direction: column; gap: 16px; padding: 16px 24px; }
  nav { display: none; /* Simplify for mobile demo */ } 
  .tab-bar { top: 70px; }
}