/**
 * =============================================================================
 * OCTOBER 18 • DUGYALA SANJU SRI
 * DESIGN SYSTEM & MASTER STYLESHEET
 * =============================================================================
 */

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

:root {
  /* Design System Color Palette */
  --color-espresso: #0F0C0D;
  --color-espresso-surface: #171315;
  --color-parchment: #F6F1E7;
  --color-parchment-warm: #EFE8DA;
  --color-parchment-deep: #DFCDB4;
  --color-terracotta: #C86D51;
  --color-terracotta-dark: #A24B31;
  --color-charcoal: #2B2927;
  --color-charcoal-deep: #1A1817;
  --color-gold: #D4A359;
  --color-gold-glow: #F3CA8A;
  --color-coral: #FF4D2E;
  --color-amber: #FF9E6D;
  --color-cream: #FAF8F3;

  /* Typography */
  --font-editorial: 'Playfair Display', Georgia, serif;
  --font-poetic: 'Cormorant Garamond', Garamond, serif;
  --font-ui: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-handwriting: 'Caveat', cursive, sans-serif;

  /* Transitions & Timing */
  --ease-smooth: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-damped: cubic-bezier(0.16, 1, 0.3, 1);

  /* Scroll Transition Factor (0 = Espresso, 1 = Parchment) */
  --scroll-transition-t: 0;
}

/* Modern CSS Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--color-espresso);
}

body {
  font-family: var(--font-ui);
  color: var(--color-charcoal);
  background-color: color-mix(
    in srgb,
    var(--color-parchment) calc(var(--scroll-transition-t) * 100%),
    var(--color-espresso)
  );
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  line-height: 1.6;
  transition: background-color 0.4s var(--ease-smooth);
}

/* =============================================================================
 * VIEWPORT FILM-GRAIN OVERLAY (Subtle, tactile film aesthetic)
 * ============================================================================= */
.film-grain-overlay {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.045;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Typography Presets */
h1, h2, h3, h4 {
  font-family: var(--font-editorial);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

p {
  font-size: 1.05rem;
}

/* Section Containers */
.story-section {
  position: relative;
  width: 100%;
  min-height: 100vh;
  overflow: hidden;
}

/* Interactive Focus Outlines */
:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 3px;
}

/* Selection Color */
::selection {
  background-color: var(--color-terracotta);
  color: var(--color-parchment);
}

/* Floating Music Toggle Button */
.floating-controls {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 1000;
}

.cute-music-btn {
  background: rgba(22, 19, 20, 0.75);
  border: 1px solid rgba(212, 163, 89, 0.4);
  color: #EADCC8;
  border-radius: 9999px;
  padding: 6px 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
  transition: all 0.25s ease;
}

.cute-music-btn:hover {
  background: rgba(30, 26, 27, 0.95);
  border-color: #D4A359;
  color: #FFDD99;
  transform: scale(1.05);
}

.cute-music-btn.is-active {
  border-color: #FF4D2E;
  color: #FFDD99;
}

.cute-music-btn.is-active .music-icon {
  animation: musicBeat 1.2s ease-in-out infinite;
}

@keyframes musicBeat {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.25); }
}