/* ===================================================================
   BILI KIDS - THE RAINBOW OF COLORS (VIDEO STORYBOOK)
   Responsive 3D Story Theater, Video Tap-to-Replay, Realistic Physics
   =================================================================== */

:root {
  --font-title: 'Fredoka One', cursive, sans-serif;
  --font-story: 'Nunito', 'Quicksand', sans-serif;
  --font-ui: 'Nunito', sans-serif;

  --c-red: #e74c3c;
  --c-yellow: #f1c40f;
  --c-blue: #3498db;
  --c-green: #2ecc71;
  --c-orange: #e67e22;
  --c-purple: #9b59b6;
  --c-pink: #fd79a8;

  --paper-bg: #fffefb;
  --paper-border: #f1ede2;
  --paper-shadow: rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

body {
  font-family: var(--font-ui);
  background: radial-gradient(circle at 50% 15%, #2c3a47 0%, #182c3f 60%, #0d1a26 100%);
  min-height: 100vh;
  color: #fff;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

/* --- HEADER BAR --- */
.colors-header {
  background: rgba(18, 28, 40, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 2px solid rgba(241, 196, 15, 0.25);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 10px 20px;
}

.header-content {
  max-width: 1320px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.logo-area .home-logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo {
  height: 42px;
  width: auto;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.4));
}

.logo-text {
  font-family: var(--font-title);
  font-size: 24px;
  color: #fff;
  letter-spacing: 0.5px;
}

.logo-text .highlight {
  color: var(--c-yellow);
}

.badge-tag {
  font-size: 13px;
  background: linear-gradient(135deg, #e67e22, #f39c12);
  color: #fff;
  padding: 3px 10px;
  border-radius: 12px;
  vertical-align: middle;
  font-weight: 800;
  text-transform: uppercase;
  margin-left: 6px;
  box-shadow: 0 2px 8px rgba(243, 156, 18, 0.4);
}

/* Suite Navigation Pills */
.suite-switcher {
  display: flex;
  gap: 8px;
  background: rgba(0, 0, 0, 0.35);
  padding: 4px;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 20px;
  text-decoration: none;
  color: #cbd5e1;
  font-weight: 700;
  font-size: 13px;
  transition: all 0.25s ease;
}

.nav-pill:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.nav-pill.active {
  background: linear-gradient(135deg, #e74c3c, #f39c12);
  color: #fff;
  box-shadow: 0 2px 10px rgba(231, 76, 60, 0.45);
}

/* Header Action Buttons */
.header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.action-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  padding: 8px 14px;
  border-radius: 12px;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  transition: all 0.2s ease;
}

.action-btn:hover {
  background: rgba(241, 196, 15, 0.25);
  border-color: var(--c-yellow);
  transform: translateY(-1px);
}

.back-library-btn {
  background: linear-gradient(135deg, #2980b9, #3498db);
  border-color: #3498db;
}

.back-library-btn:hover {
  background: linear-gradient(135deg, #3498db, #5dade2);
}

/* --- MAIN THEATER STAGE --- */
.colors-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 20px 40px;
  background: radial-gradient(ellipse at center bottom, rgba(52, 152, 219, 0.12) 0%, transparent 70%);
}

.theater-stage {
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
}

/* Realistic Storybook Frame */
.storybook-frame {
  background: #1e2d3d;
  border-radius: 28px;
  box-shadow: 
    0 24px 60px rgba(0, 0, 0, 0.65),
    0 4px 16px rgba(231, 76, 60, 0.2),
    inset 0 1px 1px rgba(255, 255, 255, 0.15);
  border: 3px solid rgba(241, 196, 15, 0.35);
  padding: 24px;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Header Banner */
.story-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 2px dashed rgba(241, 196, 15, 0.3);
  padding-bottom: 14px;
}

.banner-tag-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 4px;
}

.colors-badge {
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 1.5px;
  color: var(--c-yellow);
  text-transform: uppercase;
}

.back-to-library-pill {
  background: rgba(255, 255, 255, 0.1);
  color: #f1f5f9;
  text-decoration: none;
  font-size: 11px;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.2s ease;
}

.back-to-library-pill:hover {
  background: rgba(241, 196, 15, 0.3);
  border-color: var(--c-yellow);
  color: #fff;
  transform: translateY(-1px);
}

.story-page-title {
  font-family: var(--font-title);
  font-size: 26px;
  color: #fff;
  letter-spacing: 0.5px;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

.page-counter-badge {
  background: linear-gradient(135deg, #e74c3c, #f39c12);
  color: #fff;
  font-family: var(--font-title);
  font-size: 15px;
  padding: 6px 16px;
  border-radius: 20px;
  box-shadow: 0 3px 10px rgba(231, 76, 60, 0.4);
}

/* Book Content Grid (2 Columns: Video & Story) */
.book-content-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  background: var(--paper-bg);
  border-radius: 22px;
  padding: 24px;
  box-shadow: 
    inset 0 0 20px rgba(0, 0, 0, 0.05),
    0 8px 24px rgba(0, 0, 0, 0.25);
  position: relative;
  cursor: pointer;
  transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.3s ease;
}

.book-content-grid:hover {
  box-shadow: 
    inset 0 0 20px rgba(0, 0, 0, 0.05),
    0 12px 36px rgba(241, 196, 15, 0.25);
}

/* Page Turn Animation Class */
.book-content-grid.page-turning {
  animation: pageTurnRealistic 0.45s ease-in-out;
}

@keyframes pageTurnRealistic {
  0% {
    transform: perspective(1000px) rotateY(0deg) scale(1);
    opacity: 1;
  }
  50% {
    transform: perspective(1000px) rotateY(-6deg) scale(0.98);
    opacity: 0.85;
  }
  100% {
    transform: perspective(1000px) rotateY(0deg) scale(1);
    opacity: 1;
  }
}

/* --- VIDEO COLUMN --- */
.video-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.video-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 18px;
  overflow: hidden;
  background: #000;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  border: 3px solid rgba(241, 196, 15, 0.4);
}

#colorsVideo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Floating Replay Badge Overlay */
.replay-overlay-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  background: rgba(231, 76, 60, 0.92);
  color: #fff;
  padding: 6px 14px;
  border-radius: 20px;
  font-family: var(--font-title);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
  pointer-events: none;
  animation: pulseBadge 2.2s infinite ease-in-out;
  transition: transform 0.2s ease;
}

@keyframes pulseBadge {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 4px 14px rgba(231, 76, 60, 0.4);
  }
  50% {
    transform: scale(1.06);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.7);
  }
}

.replay-icon {
  font-size: 16px;
  animation: spinSlow 6s linear infinite;
}

@keyframes spinSlow {
  100% { transform: rotate(360deg); }
}

/* Video Control Row */
.video-control-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 2px;
}

.replay-video-btn {
  background: linear-gradient(135deg, #e74c3c, #f39c12);
  color: #fff;
  border: none;
  padding: 8px 18px;
  border-radius: 14px;
  font-family: var(--font-title);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 12px rgba(231, 76, 60, 0.35);
  transition: all 0.2s ease;
}

.replay-video-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(231, 76, 60, 0.5);
}

.replay-video-btn:active {
  transform: translateY(1px);
}

.video-progress-bar {
  flex: 1;
  height: 10px;
  background: #e2e8f0;
  border-radius: 6px;
  overflow: hidden;
  position: relative;
}

.video-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #e74c3c, #f1c40f, #2ecc71, #3498db);
  border-radius: 6px;
  transition: width 0.1s linear;
}

.video-sound-toggle {
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  border-radius: 12px;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.video-sound-toggle:hover {
  background: #e2e8f0;
}

/* --- STORY TEXT COLUMN --- */
.story-text-container {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.story-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  justify-content: space-between;
  gap: 16px;
}

/* Color Vocab Pill */
.color-pill-wrapper {
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

.color-vocab-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, #fff3e0, #ffe0b2);
  border: 2px solid #f39c12;
  padding: 8px 18px;
  border-radius: 30px;
  box-shadow: 0 4px 12px rgba(243, 156, 18, 0.2);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.color-vocab-pill:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 18px rgba(243, 156, 18, 0.4);
}

.color-icon {
  font-size: 24px;
}

.color-name {
  font-family: var(--font-title);
  font-size: 22px;
  color: #d35400;
  letter-spacing: 1px;
}

.listen-bubble {
  background: #e67e22;
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 12px;
  text-transform: uppercase;
}

/* Dynamic themes per color */
.theme-red .color-vocab-pill { border-color: var(--c-red); background: #ffebee; }
.theme-red .color-name { color: var(--c-red); }
.theme-red .listen-bubble { background: var(--c-red); }

.theme-yellow .color-vocab-pill { border-color: var(--c-yellow); background: #fffde7; }
.theme-yellow .color-name { color: #d4ac0d; }
.theme-yellow .listen-bubble { background: #f39c12; }

.theme-blue .color-vocab-pill { border-color: var(--c-blue); background: #e3f2fd; }
.theme-blue .color-name { color: var(--c-blue); }
.theme-blue .listen-bubble { background: var(--c-blue); }

.theme-green .color-vocab-pill { border-color: var(--c-green); background: #e8f5e9; }
.theme-green .color-name { color: #27ae60; }
.theme-green .listen-bubble { background: #27ae60; }

.theme-orange .color-vocab-pill { border-color: var(--c-orange); background: #fff3e0; }
.theme-orange .color-name { color: var(--c-orange); }
.theme-orange .listen-bubble { background: var(--c-orange); }

.theme-purple .color-vocab-pill { border-color: var(--c-purple); background: #f3e5f5; }
.theme-purple .color-name { color: var(--c-purple); }
.theme-purple .listen-bubble { background: var(--c-purple); }

.theme-pink .color-vocab-pill { border-color: var(--c-pink); background: #fce4ec; }
.theme-pink .color-name { color: #e84393; }
.theme-pink .listen-bubble { background: #e84393; }

/* Narrative Story Paragraphs */
.story-narrative {
  color: #2c3e50;
  font-size: 19px;
  line-height: 1.65;
  font-weight: 700;
}

.story-narrative p {
  margin-bottom: 12px;
}

.story-narrative .highlight-word {
  color: #c0392b;
  font-family: var(--font-title);
  font-size: 21px;
  background: rgba(241, 196, 15, 0.2);
  padding: 1px 6px;
  border-radius: 6px;
}

/* Toddler Prompt Box */
.toddler-prompt-box {
  background: linear-gradient(135deg, #e8f8f5, #d1f2eb);
  border: 2px dashed #1abc9c;
  border-radius: 16px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: #0e6251;
}

.prompt-icon {
  font-size: 24px;
  animation: bounceSoft 2s infinite ease-in-out;
}

@keyframes bounceSoft {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.prompt-text {
  font-size: 16px;
  font-weight: 800;
}

/* Video Replay Actions Row */
.story-actions-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 8px;
  border-top: 2px dashed #f0e6d6;
}

.repeat-action-btn {
  background: linear-gradient(135deg, #e74c3c, #f39c12);
  color: #fff;
  border: none;
  padding: 10px 22px;
  border-radius: 14px;
  font-family: var(--font-title);
  font-size: 15px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 14px rgba(231, 76, 60, 0.4);
  transition: all 0.2s ease;
}

.repeat-action-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(231, 76, 60, 0.6);
}

.repeat-action-btn:active {
  transform: translateY(1px);
}

.tap-hint-pill {
  font-size: 13px;
  font-weight: 800;
  color: #7f8c8d;
  background: #f8fafc;
  padding: 6px 12px;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
}

/* --- NAVIGATION BAR --- */
.book-nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 8px;
}

.nav-turn-btn {
  background: linear-gradient(135deg, #34495e, #2c3e50);
  border: 2px solid rgba(241, 196, 15, 0.4);
  color: #fff;
  padding: 12px 26px;
  border-radius: 16px;
  font-family: var(--font-title);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
  transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.nav-turn-btn:hover:not(:disabled) {
  background: linear-gradient(135deg, #e74c3c, #f39c12);
  border-color: #fff;
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 6px 20px rgba(231, 76, 60, 0.5);
}

.nav-turn-btn:active:not(:disabled) {
  transform: translateY(1px) scale(0.98);
}

.nav-turn-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  border-color: transparent;
}

/* Page Dots Track with Color Mini-Thumbnails */
.page-dots-track {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.dot-btn {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
  border: 2px solid rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
}

.dot-btn:hover {
  background: rgba(241, 196, 15, 0.25);
  border-color: var(--c-yellow);
  transform: translateY(-2px);
}

.dot-btn.active {
  background: linear-gradient(135deg, #e74c3c, #f39c12);
  border-color: #fff;
  transform: translateY(-3px) scale(1.15);
  box-shadow: 0 6px 16px rgba(231, 76, 60, 0.55);
}

.dot-btn .dot-num {
  position: absolute;
  bottom: -4px;
  right: -4px;
  background: #2c3e50;
  color: #fff;
  font-size: 9px;
  font-weight: 900;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #fff;
}

/* --- CELEBRATION MODAL --- */
.celebration-modal {
  position: fixed;
  inset: 0;
  background: rgba(10, 18, 28, 0.88);
  backdrop-filter: blur(10px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}

.celebration-modal.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: linear-gradient(135deg, #1e293b, #0f172a);
  border: 3px solid #f1c40f;
  border-radius: 28px;
  max-width: 560px;
  width: 100%;
  padding: 36px 30px;
  text-align: center;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8), 0 0 30px rgba(241, 196, 15, 0.35);
  position: relative;
  overflow: hidden;
  animation: popInModal 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes popInModal {
  0% { transform: scale(0.85); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

.diploma-icon {
  font-size: 56px;
  margin-bottom: 8px;
}

.modal-title {
  font-family: var(--font-title);
  font-size: 28px;
  color: #fff;
  margin-bottom: 8px;
}

.modal-subtitle {
  color: #cbd5e1;
  font-size: 16px;
  margin-bottom: 24px;
}

.colors-diploma-badge {
  background: rgba(241, 196, 15, 0.12);
  border: 2px dashed #f1c40f;
  border-radius: 18px;
  padding: 16px;
  margin-bottom: 28px;
}

.badge-emblem {
  font-size: 28px;
  margin-bottom: 6px;
  letter-spacing: 2px;
}

.badge-title {
  font-family: var(--font-title);
  font-size: 20px;
  color: #f1c40f;
  letter-spacing: 0.5px;
}

.badge-cert {
  font-size: 13px;
  font-weight: 700;
  color: #94a3b8;
  text-transform: uppercase;
  margin-top: 2px;
}

.modal-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.modal-btn {
  padding: 12px 24px;
  border-radius: 16px;
  font-family: var(--font-title);
  font-size: 15px;
  text-decoration: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
  border: none;
}

.modal-btn.primary-btn {
  background: linear-gradient(135deg, #e74c3c, #f39c12);
  color: #fff;
  box-shadow: 0 4px 16px rgba(231, 76, 60, 0.4);
}

.modal-btn.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(231, 76, 60, 0.6);
}

.modal-btn.secondary-btn {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.modal-btn.secondary-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* --- RESPONSIVE ADJUSTMENTS --- */
@media (max-width: 960px) {
  .book-content-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 16px;
  }

  .story-page-title {
    font-size: 22px;
  }

  .story-narrative {
    font-size: 17px;
  }

  .dot-btn {
    width: 38px;
    height: 38px;
    font-size: 17px;
  }
}

@media (max-width: 640px) {
  .header-content {
    justify-content: center;
  }

  .suite-switcher {
    order: 3;
    width: 100%;
    justify-content: center;
    overflow-x: auto;
  }

  .storybook-frame {
    padding: 16px;
    border-radius: 20px;
  }

  .nav-turn-btn {
    padding: 10px 18px;
    font-size: 14px;
  }

  .story-actions-row {
    flex-direction: column;
    align-items: stretch;
  }
}