/* 
  ElevateLivingCo — Ebooks Visual System
  Isolated CSS for CHE's Bookshelf & Book Detail Experience
  Palette: Obsidian Black, Deep Burgundy, Wine Red, Warm Gold
  Features: Native 3D Book Perspective, Specular Glassmorphism, Responsive Mobile Fallbacks
*/

:root {
  --eb-obsidian: #070506;
  --eb-obsidian-surface: #0E090B;
  --eb-burgundy-dark: #29050B;
  --eb-burgundy-mid: #4A0E17;
  --eb-wine-red: #6B1120;
  --eb-crimson: #8B0000;
  --eb-gold: #C9A44A;
  --eb-gold-light: #F0DBA0;
  --eb-gold-glow: rgba(201, 164, 74, 0.35);
  --eb-glass-bg: rgba(18, 9, 12, 0.75);
  --eb-glass-border: rgba(201, 164, 74, 0.22);
  --eb-glass-shadow: 0 16px 48px rgba(0, 0, 0, 0.7);
  --eb-text-main: #F5F2ED;
  --eb-text-muted: rgba(245, 242, 237, 0.72);
}

/* Base Page Background with Atmospheric Radial Light Pools */
.ebooks-page {
  background-color: var(--eb-obsidian);
  color: var(--eb-text-main);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  font-family: var(--f-sans);
}

.ebooks-ambient-glow {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1400px;
  height: 900px;
  background: 
    radial-gradient(circle at 50% 18%, rgba(107, 17, 32, 0.38) 0%, rgba(74, 14, 23, 0.2) 40%, transparent 75%),
    radial-gradient(circle at 80% 35%, rgba(201, 164, 74, 0.08) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* Shared Container */
.ebooks-container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 var(--safe-area);
  position: relative;
  z-index: 2;
}

/* Glassmorphic Surface Cards */
.eb-glass-card {
  background: var(--eb-glass-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--eb-glass-border);
  border-radius: 20px;
  box-shadow: var(--eb-glass-shadow);
  position: relative;
  overflow: hidden;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.35s ease, box-shadow 0.35s ease;
}

.eb-glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(240, 219, 160, 0.4) 50%, transparent 100%);
  pointer-events: none;
}

/* Eyebrow & Badges */
.eb-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--f-sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--eb-gold);
  margin-bottom: 1rem;
}

.eb-eyebrow-line {
  width: 24px;
  height: 1px;
  background-color: var(--eb-gold);
}

.eb-badge {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 9999px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  background: rgba(107, 17, 32, 0.5);
  border: 1px solid rgba(201, 164, 74, 0.3);
  color: var(--eb-gold-light);
}

/* Buttons */
.eb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 1rem 2.2rem;
  border-radius: 9999px;
  font-family: var(--f-sans);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  border: none;
  position: relative;
  z-index: 1;
}

.eb-btn-primary {
  background: linear-gradient(135deg, #C9A44A 0%, #9A7727 100%);
  color: #070506;
  box-shadow: 0 6px 24px rgba(201, 164, 74, 0.35);
  border-top: 1px solid rgba(255, 255, 255, 0.4);
}

.eb-btn-primary:hover {
  transform: translateY(-2px);
  background: linear-gradient(135deg, #F0DBA0 0%, #C9A44A 100%);
  box-shadow: 0 10px 32px rgba(201, 164, 74, 0.5);
  color: #000000;
}

.eb-btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--eb-text-main);
  border: 1px solid rgba(201, 164, 74, 0.35);
  backdrop-filter: blur(8px);
}

.eb-btn-secondary:hover {
  background: rgba(201, 164, 74, 0.15);
  border-color: var(--eb-gold);
  color: #FFFFFF;
  transform: translateY(-2px);
}

/* Native 3D Book Cover Stage */
.eb-book-stage {
  perspective: 1200px;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px 0;
}

.eb-book-3d {
  position: relative;
  width: 315px;
  aspect-ratio: 2 / 3;
  transform-style: preserve-3d;
  transform: rotateY(-18deg) rotateX(6deg);
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.5s ease;
  cursor: pointer;
}

.eb-book-3d:hover {
  transform: rotateY(-6deg) rotateX(2deg) translateY(-8px) scale(1.02);
}

.eb-book-cover-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 4px 12px 12px 4px;
  box-shadow: 
    -12px 16px 36px rgba(0, 0, 0, 0.8),
    -2px 0 10px rgba(0, 0, 0, 0.5),
    0 0 20px rgba(107, 17, 32, 0.3);
  position: relative;
  z-index: 2;
}

/* 3D Spine and Page Edges Effects */
.eb-book-spine {
  position: absolute;
  top: 0;
  left: 0;
  width: 14px;
  height: 100%;
  background: linear-gradient(90deg, rgba(0,0,0,0.9) 0%, rgba(201,164,74,0.25) 70%, rgba(255,255,255,0.05) 100%);
  transform-origin: left center;
  transform: rotateY(-90deg);
  border-radius: 4px 0 0 4px;
}

.eb-book-pages {
  position: absolute;
  top: 3px;
  right: 0;
  width: 14px;
  height: calc(100% - 6px);
  background: linear-gradient(90deg, #C5BEAA 0%, #9E9785 100%);
  transform-origin: right center;
  transform: rotateY(90deg);
  box-shadow: inset 0 0 4px rgba(0,0,0,0.5);
  border-radius: 0 2px 2px 0;
}

/* Tropes Pills */
.eb-tropes-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 1.5rem 0;
}

.eb-trope-pill {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 6px 16px;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(240, 219, 160, 0.2);
  color: rgba(245, 242, 237, 0.9);
  transition: all 0.25s ease;
}

.eb-trope-pill:hover {
  background: rgba(107, 17, 32, 0.3);
  border-color: var(--eb-gold);
  color: #FFFFFF;
}

/* Catalog Grid Layout */
.eb-catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
  margin-top: 3rem;
}

.eb-card-body {
  padding: 2.2rem;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.eb-card-title {
  font-family: var(--f-serif);
  font-size: 1.75rem;
  font-weight: 700;
  color: #FFFFFF;
  margin: 0.5rem 0 0.75rem 0;
  line-height: 1.25;
}

.eb-card-desc {
  font-size: 0.925rem;
  line-height: 1.65;
  color: var(--eb-text-muted);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

/* Elevate Return CTA Section */
.eb-return-section {
  margin: 5rem 0 3rem 0;
  text-align: center;
}

.eb-return-card {
  padding: 3.5rem 2rem;
  max-width: 840px;
  margin: 0 auto;
  border: 1px solid var(--eb-glass-border);
  background: linear-gradient(180deg, rgba(25, 10, 15, 0.8) 0%, rgba(10, 5, 7, 0.95) 100%);
}

.eb-return-title {
  font-family: var(--f-serif);
  font-size: 2rem;
  color: #FFFFFF;
  margin-bottom: 0.75rem;
}

.eb-return-sub {
  color: var(--eb-text-muted);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto 2rem auto;
}

/* Responsive Overrides */
@media (max-width: 980px) {
  .eb-glass-card {
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    background: rgba(18, 9, 12, 0.92);
  }

  .eb-book-3d {
    width: 230px;
    transform: rotateY(-10deg) rotateX(4deg);
  }
}

@media (max-width: 768px) {
  .eb-book-stage {
    perspective: none;
    padding: 10px 0;
  }

  .eb-book-3d {
    width: 210px;
    transform: none !important;
  }

  .eb-book-cover-img {
    box-shadow: 0 12px 30px rgba(0,0,0,0.8), 0 0 16px rgba(107, 17, 32, 0.4);
  }

  .eb-book-spine,
  .eb-book-pages {
    display: none;
  }

  .eb-btn {
    width: 100%;
    padding: 0.9rem 1.5rem;
  }
}

/* Reduced Motion Fallback */
@media (prefers-reduced-motion: reduce) {
  .eb-book-3d {
    transform: none !important;
    transition: none !important;
  }
  .eb-glass-card,
  .eb-btn {
    transition: none !important;
  }
}