/**
 * ==========================================================================
 * UNISELF — 3D Book Page-Flip Loading Animation
 * Scoped strictly under .uniself-loader-overlay / .ubl-* to prevent any
 * collisions with hero showcase book, typography, or cards.
 * ==========================================================================
 */

.uniself-loader-overlay {
  --ubl-cover: #6B3F2F;
  --ubl-cover-border: #C4A24B;
  --ubl-spine: #4A281E;
  --ubl-ribbon: #C4A24B;
  --ubl-page: #F5EFE0;
  --ubl-page-back: #ECE5D2;
  --ubl-ink: rgba(42, 31, 24, 0.25);
  --ubl-gold: #C4A24B;
  --ubl-overlay-bg: rgba(26, 20, 16, 0.88);
  --ubl-text: #F5EFE0;
  --ubl-subtext: #C4A24B;
  --ubl-font-display: 'Cormorant Garamond', 'Fraunces', Georgia, serif;
  --ubl-font-body: 'Lora', 'Manrope', serif;

  position: fixed !important;
  inset: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  background: var(--ubl-overlay-bg) !important;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex !important;
  flex-direction: column !important;
  align-items: center !important;
  justify-content: center !important;
  z-index: 999999 !important;
  user-select: none !important;
  -webkit-user-select: none !important;
  opacity: 1;
  visibility: visible;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

/* ==========================================================================
   Themes
   ========================================================================== */

.uniself-loader-overlay.theme-royal-blue {
  --ubl-cover: #1e3a8a;
  --ubl-cover-border: #60a5fa;
  --ubl-spine: #0f172a;
  --ubl-ribbon: #3b82f6;
  --ubl-page: #ffffff;
  --ubl-page-back: #f1f5f9;
  --ubl-ink: rgba(30, 41, 59, 0.2);
  --ubl-gold: #3b82f6;
  --ubl-overlay-bg: rgba(15, 23, 42, 0.92);
  --ubl-text: #f8fafc;
  --ubl-subtext: #93c5fd;
}

.uniself-loader-overlay.theme-gold {
  --ubl-cover: #1c1917;
  --ubl-cover-border: #D4AF37;
  --ubl-spine: #0c0a09;
  --ubl-ribbon: #D4AF37;
  --ubl-page: #fafaf9;
  --ubl-page-back: #f5f5f4;
  --ubl-ink: rgba(28, 25, 23, 0.25);
  --ubl-gold: #D4AF37;
  --ubl-overlay-bg: rgba(12, 10, 9, 0.94);
  --ubl-text: #F5EFE0;
  --ubl-subtext: #D4AF37;
}

.uniself-loader-overlay.theme-emerald {
  --ubl-cover: #244237;
  --ubl-cover-border: #C4A24B;
  --ubl-spine: #162a23;
  --ubl-ribbon: #C4A24B;
  --ubl-page: #F5EFE0;
  --ubl-page-back: #ECE5D2;
  --ubl-ink: rgba(42, 31, 24, 0.25);
  --ubl-gold: #4A6B5F;
  --ubl-overlay-bg: rgba(18, 32, 27, 0.92);
  --ubl-text: #F5EFE0;
  --ubl-subtext: #A7D7C5;
}

.uniself-loader-overlay.theme-dark {
  --ubl-cover: #27272a;
  --ubl-cover-border: #71717a;
  --ubl-spine: #18181b;
  --ubl-ribbon: #a1a1aa;
  --ubl-page: #e4e4e7;
  --ubl-page-back: #d4d4d8;
  --ubl-ink: rgba(24, 24, 27, 0.3);
  --ubl-gold: #a1a1aa;
  --ubl-overlay-bg: rgba(9, 9, 11, 0.94);
  --ubl-text: #f4f4f5;
  --ubl-subtext: #a1a1aa;
}

.uniself-loader-overlay.is-hidden {
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

/* ==========================================================================
   3D Book Stage
   ========================================================================== */

.uniself-loader-overlay .ubl-stage {
  position: relative;
  width: 180px;
  height: 120px;
  perspective: 1000px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: ublFloating 3.2s ease-in-out infinite alternate;
}

.uniself-loader-overlay .ubl-book-3d {
  position: relative;
  width: 160px;
  height: 105px;
  transform-style: preserve-3d;
  transform: rotateX(28deg) rotateY(0deg);
}

/* Hardcover Covers */
.uniself-loader-overlay .ubl-cover-left {
  position: absolute;
  top: 0;
  left: 0;
  width: 80px;
  height: 105px;
  background: var(--ubl-cover);
  border-radius: 6px 2px 2px 6px;
  transform-origin: right center;
  transform: rotateY(-32deg);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.45);
  box-sizing: border-box;
}

.uniself-loader-overlay .ubl-cover-right {
  position: absolute;
  top: 0;
  right: 0;
  width: 80px;
  height: 105px;
  background: var(--ubl-cover);
  border-radius: 2px 6px 6px 2px;
  transform-origin: left center;
  transform: rotateY(32deg);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.45);
  box-sizing: border-box;
}

.uniself-loader-overlay .ubl-cover-emboss {
  position: absolute;
  inset: 5px;
  border: 1px dashed var(--ubl-cover-border);
  opacity: 0.7;
  border-radius: inherit;
}

/* Spine & Ribbon */
.uniself-loader-overlay .ubl-spine {
  position: absolute;
  left: 50%;
  top: 0;
  width: 8px;
  height: 105px;
  transform: translateX(-50%);
  background: var(--ubl-spine);
  border-radius: 3px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
  z-index: 25;
}

.uniself-loader-overlay .ubl-ribbon {
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 120px;
  background: var(--ubl-ribbon);
  border-radius: 2px 2px 0 0;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  z-index: 30;
}

/* ==========================================================================
   Flipping Pages (One by One Sequential Animation)
   ========================================================================== */

.uniself-loader-overlay .ubl-pages-group {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
}

.uniself-loader-overlay .ubl-flip-leaf {
  position: absolute;
  top: 4px;
  left: 80px;
  width: 74px;
  height: 97px;
  transform-origin: left center;
  transform-style: preserve-3d;
  animation: ublTurnLeaf 1.8s cubic-bezier(0.42, 0, 0.18, 1) infinite;
  will-change: transform, opacity;
}

.uniself-loader-overlay .ubl-leaf-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  padding: 8px 6px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-sizing: border-box;
}

.uniself-loader-overlay .ubl-leaf-front {
  background: var(--ubl-page);
  border-radius: 0 4px 4px 0;
  box-shadow: inset 3px 0 6px rgba(0, 0, 0, 0.08), 0 3px 8px rgba(0, 0, 0, 0.2);
}

.uniself-loader-overlay .ubl-leaf-back {
  background: var(--ubl-page-back);
  border-radius: 4px 0 0 4px;
  transform: rotateY(180deg);
  box-shadow: inset -3px 0 6px rgba(0, 0, 0, 0.08), 0 3px 8px rgba(0, 0, 0, 0.2);
}

.uniself-loader-overlay .ubl-leaf-lines {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
}

.uniself-loader-overlay .ubl-leaf-bar {
  display: block;
  height: 2px;
  width: 88%;
  background: var(--ubl-ink);
  border-radius: 2px;
}

.uniself-loader-overlay .ubl-leaf-bar-gold {
  background: var(--ubl-gold);
  height: 3px;
  width: 65%;
}

.uniself-loader-overlay .ubl-leaf-bar-short {
  width: 45%;
}

.uniself-loader-overlay .ubl-leaf-glyph {
  font-size: 10px;
  color: var(--ubl-gold);
  text-align: center;
  opacity: 0.7;
}

@keyframes ublTurnLeaf {
  0% {
    transform: rotateY(0deg);
    opacity: 0.95;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
  }
  20% {
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  100% {
    transform: rotateY(-180deg);
    opacity: 0.25;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  }
}

/* Floor Shadow & Floating Animation */
.uniself-loader-overlay .ubl-floor-shadow {
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 140px;
  height: 18px;
  background: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.5) 0%, rgba(0, 0, 0, 0) 70%);
  border-radius: 50%;
  animation: ublShadowGlow 3.2s ease-in-out infinite alternate;
}

@keyframes ublFloating {
  0% { transform: translateY(0px); }
  100% { transform: translateY(-8px); }
}

@keyframes ublShadowGlow {
  0% { transform: translateX(-50%) scale(1); opacity: 0.8; }
  100% { transform: translateX(-50%) scale(0.85); opacity: 0.5; }
}

/* ==========================================================================
   Typography
   ========================================================================== */

.uniself-loader-overlay .ubl-caption-box {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}

.uniself-loader-overlay .ubl-title {
  margin: 0;
  font-family: var(--ubl-font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--ubl-text);
  animation: ublTitleGlow 2s ease-in-out infinite alternate;
}

.uniself-loader-overlay .ubl-subtitle {
  margin: 0;
  font-family: var(--ubl-font-body);
  font-size: 13px;
  font-style: italic;
  letter-spacing: 0.8px;
  color: var(--ubl-subtext);
  opacity: 0.85;
}

.uniself-loader-overlay .ubl-dots {
  display: flex;
  gap: 6px;
  margin-top: 8px;
}

.uniself-loader-overlay .ubl-dots span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ubl-subtext);
  animation: ublDotWave 1.4s ease-in-out infinite;
}

.uniself-loader-overlay .ubl-dots span:nth-child(2) { animation-delay: 0.2s; }
.uniself-loader-overlay .ubl-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes ublTitleGlow {
  0% { opacity: 0.85; }
  100% { opacity: 1; }
}

@keyframes ublDotWave {
  0%, 100% { opacity: 0.2; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.2); }
}