/* ==========================================================================
   IKURA ISTANBUL — Luxury Leather Goods & Pure Silk Atelier
   Complete Design System & Stylesheet (Prompt.txt + Intro Experience)
   ========================================================================== */

:root {
  /* Core Brand Palette (from Prompt.txt & Intro Experience) */
  --espresso: #27221E;
  --espresso-deep: #110D0A;
  --espresso-card: #1A1511;
  --cognac: #A66F48;
  --cognac-light: #C68B59;
  --sand: #E8DFD2;
  --ivory: #F7F5F0;
  --charcoal: #242424;
  --gold: #C59B32;
  --gold-light: #F3E5AB;
  --gold-dark: #8A6421;

  /* Active Theme Variables — Default: Atelier Dark (matches Intro Experience) */
  --bg-primary: #110D0A;
  --bg-secondary: #1A1511;
  --bg-elevated: #27221E;
  --bg-glass: rgba(17, 13, 10, 0.86);
  --text-primary: #F7F5F0;
  --text-secondary: #E8DFD2;
  --text-muted: rgba(232, 223, 210, 0.62);
  --border-subtle: rgba(197, 155, 50, 0.18);
  --border-strong: rgba(197, 155, 50, 0.42);
  --accent-primary: #C59B32;
  --accent-secondary: #A66F48;
  --card-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);

  /* Typography */
  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Transitions */
  --ease-luxury: cubic-bezier(0.22, 1, 0.36, 1);
}

/* Quiet Luxury Ivory Theme (Light Editorial Mode from Prompt.txt) */
html[data-theme="ivory"] {
  --bg-primary: #F7F5F0;
  --bg-secondary: #E8DFD2;
  --bg-elevated: #FFFFFF;
  --bg-glass: rgba(247, 245, 240, 0.90);
  --text-primary: #27221E;
  --text-secondary: #242424;
  --text-muted: rgba(39, 34, 30, 0.65);
  --border-subtle: rgba(39, 34, 30, 0.12);
  --border-strong: rgba(166, 111, 72, 0.45);
  --accent-primary: #A66F48;
  --accent-secondary: #C59B32;
  --card-shadow: 0 20px 50px rgba(39, 34, 30, 0.08);
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  transition: background-color 0.6s var(--ease-luxury), color 0.6s var(--ease-luxury);
}

body {
  overflow-x: hidden;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
}

/* Custom Luxury Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--cognac);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--gold);
}

/* ==========================================================================
   3D GOLDEN EMBOSS & TEXTURE UTILITIES (from Intro Experience)
   ========================================================================== */
.gold-emboss {
  background: linear-gradient(
    135deg,
    #8A6421 0%,
    #C59B32 20%,
    #F3E5AB 40%,
    #D4AF37 50%,
    #8A6421 70%,
    #F3E5AB 85%,
    #C59B32 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0px 2px 3px rgba(0, 0, 0, 0.75))
          drop-shadow(0px -1px 0px rgba(255, 255, 255, 0.25));
  animation: shine 9s linear infinite;
}

.gold-foil-text {
  background: linear-gradient(135deg, #C59B32 0%, #F3E5AB 50%, #A66F48 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

@keyframes shine {
  to {
    background-position: 200% center;
  }
}

.gold-icon-emboss {
  filter: drop-shadow(0px 3px 5px rgba(0, 0, 0, 0.85))
          drop-shadow(0px -1px 1px rgba(255, 235, 160, 0.35));
}

/* Stitch Dashed Lines */
.stitch-border {
  border-image: repeating-linear-gradient(
    90deg,
    var(--gold),
    var(--gold) 6px,
    transparent 6px,
    transparent 12px
  ) 1;
}

.stitch-box {
  border: 1px dashed rgba(197, 155, 50, 0.38);
}

/* Leather Grain Overlay */
.leather-grain-bg {
  background-color: var(--bg-primary);
  background-image:
    radial-gradient(circle at 50% 35%, rgba(166, 111, 72, 0.12) 0%, transparent 70%);
}

/* ==========================================================================
   INTRO SPLASH OVERLAY ANIMATIONS
   ========================================================================== */
#intro-experience-overlay {
  transition: opacity 0.9s var(--ease-luxury), visibility 0.9s var(--ease-luxury), transform 0.9s var(--ease-luxury);
}

#intro-experience-overlay.intro-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: scale(1.03);
}

.intro-stage-item {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 1.1s var(--ease-luxury), transform 1.1s var(--ease-luxury);
}

.intro-stage-item.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Sound Wave Equalizer Animation */
.eq-bar {
  width: 2px;
  background-color: var(--gold);
  border-radius: 2px;
  transition: height 0.2s ease;
}

.audio-playing .eq-bar:nth-child(1) { animation: eqPulse 0.8s ease-in-out infinite 0.0s; }
.audio-playing .eq-bar:nth-child(2) { animation: eqPulse 0.8s ease-in-out infinite 0.2s; }
.audio-playing .eq-bar:nth-child(3) { animation: eqPulse 0.8s ease-in-out infinite 0.4s; }
.audio-playing .eq-bar:nth-child(4) { animation: eqPulse 0.8s ease-in-out infinite 0.1s; }

@keyframes eqPulse {
  0%, 100% { height: 4px; }
  50% { height: 14px; }
}

/* ==========================================================================
   PRODUCT CARD FRONT/REAR HOVER & LUXURY TRANSITIONS
   ========================================================================== */
.product-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  transition: transform 0.55s var(--ease-luxury), border-color 0.45s ease, box-shadow 0.55s var(--ease-luxury);
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-strong);
  box-shadow: var(--card-shadow);
}

.product-img-wrapper {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 5;
  background: #16120E;
}

html[data-theme="ivory"] .product-img-wrapper {
  background: #EFECE6;
}

.product-img-front,
.product-img-rear {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.65s var(--ease-luxury), transform 0.85s var(--ease-luxury);
}

.product-img-rear {
  position: absolute;
  inset: 0;
  opacity: 0;
}

.product-card:hover .product-img-rear.has-rear {
  opacity: 1;
  transform: scale(1.04);
}

.product-card:hover .product-img-front {
  transform: scale(1.04);
}

/* Quick Action Bar on Product Card */
.product-quick-bar {
  transform: translateY(100%);
  transition: transform 0.45s var(--ease-luxury);
}

.product-card:hover .product-quick-bar {
  transform: translateY(0);
}

/* Editorial Image Zoom */
.editorial-zoom-wrap {
  overflow: hidden;
}
.editorial-zoom-wrap img,
.editorial-zoom-wrap video {
  transition: transform 1.1s var(--ease-luxury);
}
.editorial-zoom-wrap:hover img,
.editorial-zoom-wrap:hover video {
  transform: scale(1.05);
}

/* Modal & Drawer Backdrop */
.luxury-backdrop {
  background: rgba(8, 6, 5, 0.78);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* Custom Tab Active Underline */
.filter-pill {
  position: relative;
  transition: all 0.35s var(--ease-luxury);
}
.filter-pill.active {
  background-color: var(--gold);
  color: #110D0A;
  border-color: var(--gold);
  font-weight: 600;
}

/* Patina Slider Card */
.patina-stage-btn.active {
  border-color: var(--gold);
  background: rgba(197, 155, 50, 0.14);
}

/* ==========================================================================
   OUT-OF-STOCK / SOLD OUT SHADED LUXURY STATE
   ========================================================================== */
.product-card.is-out-of-stock {
  border-color: rgba(197, 155, 50, 0.12);
}

.product-card.is-out-of-stock .product-img-front,
.product-card.is-out-of-stock .product-img-rear {
  filter: grayscale(68%) brightness(0.56) contrast(0.95);
  transition: filter 0.6s var(--ease-luxury), opacity 0.65s var(--ease-luxury), transform 0.85s var(--ease-luxury);
}

.product-card.is-out-of-stock:hover .product-img-front,
.product-card.is-out-of-stock:hover .product-img-rear {
  filter: grayscale(45%) brightness(0.68);
}

.sold-out-shroud {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(12, 9, 7, 0.58) 0%, rgba(10, 8, 6, 0.42) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  z-index: 5;
}

.sold-out-ribbon {
  padding: 0.6rem 1.35rem;
  background: rgba(17, 13, 10, 0.92);
  border: 1px solid rgba(220, 90, 90, 0.55);
  color: #FCA5A5;
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-weight: 600;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
}

html[data-theme="ivory"] .sold-out-shroud {
  background: radial-gradient(circle at center, rgba(25, 20, 16, 0.5) 0%, rgba(25, 20, 16, 0.32) 100%);
}