/* Google Fonts: Rounded & Child-Friendly Typography */
@import url('https://fonts.googleapis.com/css2?family=Fredoka:wght@300..700&family=Quicksand:wght@300..700&display=swap');

:root {
  --bg-primary: #FFF9EB;
  --bg-secondary: #FFF1D0;
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-border: rgba(255, 204, 102, 0.5);
  --text-main: #2C3E50;
  --text-muted: #5D6D7E;
  
  --kids-red: #FF5964;
  --kids-blue: #35A7FF;
  --kids-yellow: #FFC107;
  --kids-green: #8CB369;
  --kids-purple: #9B5DE5;
  --kids-pink: #F15BB5;
  --kids-orange: #F4A261;
}

[data-theme="dark"] {
  --bg-primary: #0F172A;
  --bg-secondary: #1E293B;
  --card-bg: rgba(30, 41, 59, 0.7);
  --card-border: rgba(56, 189, 248, 0.3);
  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  
  --kids-red: #FF6B6B;
  --kids-blue: #38BDF8;
}

body {
  font-family: 'Fredoka', 'Quicksand', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-primary);
  background-image: radial-gradient(var(--bg-secondary) 15%, transparent 16%),
                    radial-gradient(var(--bg-secondary) 15%, transparent 16%);
  background-size: 60px 60px;
  background-position: 0 0, 30px 30px;
  color: var(--text-main);
  min-height: 100vh;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  position: relative;
  transition: all 0.3s ease;
}

/* ==========================================
   DYNAMIC STORY BACKGROUND THEMES
   ========================================== */
body.theme-rainy {
  background-color: #EBF2FF;
  background-image: linear-gradient(180deg, #EBF2FF 0%, #C8DDFB 100%);
}
body.theme-night {
  background-color: #0F172A;
  background-image: radial-gradient(#1E293B 10%, transparent 11%);
  background-size: 40px 40px;
  color: #F8FAFC;
}
body.theme-sky {
  background-color: #E3F2FD;
  background-image: linear-gradient(180deg, #E3F2FD 0%, #90CAF9 100%);
}
body.theme-forest {
  background-color: #F1F8E9;
  background-image: linear-gradient(180deg, #F1F8E9 0%, #C5E1A5 100%);
}

/* Animated Rain Drops */
.rain-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.18;
  overflow: hidden;
}
body.theme-rainy .rain-overlay {
  display: block;
}
.drop {
  position: absolute;
  background: linear-gradient(transparent, #35A7FF);
  width: 2.5px;
  height: 25px;
  opacity: 0.85;
  animation: fall 1.2s linear infinite;
}
@keyframes fall {
  0% { transform: translateY(-50px) rotate(15deg); }
  100% { transform: translateY(110vh) rotate(15deg); }
}

/* Animated Star Particles for Night Theme */
.night-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}
body.theme-night .night-overlay {
  display: block;
}
.star-particle {
  position: absolute;
  background: #FFF;
  border-radius: 50%;
  animation: twinkle 1.5s infinite alternate;
}
@keyframes twinkle {
  0% { opacity: 0.2; transform: scale(0.8); }
  100% { opacity: 1; transform: scale(1.2); }
}

/* ==========================================
   UI PANELS & CARDS
   ========================================== */
.kids-card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 4px solid var(--card-border);
  border-radius: 32px;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.06);
  z-index: 2;
  position: relative;
  transition: all 0.3s ease;
}

.app-logo {
  font-size: 2.5rem;
  font-weight: 800;
  text-shadow: 2px 2px 0px rgba(0,0,0,0.05);
}

/* Selection card thematic borders */
.selection-card {
  cursor: pointer;
  border-radius: 24px;
  border: 4px solid transparent;
  transition: all 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.05);
}
.selection-card h4 {
  color: var(--text-main) !important;
}
.selection-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 16px 24px rgba(0, 0, 0, 0.12);
}
.card-theme-red { border-color: var(--kids-red) !important; background-color: rgba(255, 89, 100, 0.05); }
.card-theme-blue { border-color: var(--kids-blue) !important; background-color: rgba(53, 167, 255, 0.05); }
.card-theme-yellow { border-color: var(--kids-yellow) !important; background-color: rgba(255, 193, 7, 0.05); }
.card-theme-green { border-color: var(--kids-green) !important; background-color: rgba(140, 179, 105, 0.05); }
.card-theme-purple { border-color: var(--kids-purple) !important; background-color: rgba(155, 93, 229, 0.05); }
.card-theme-orange { border-color: var(--kids-orange) !important; background-color: rgba(244, 162, 97, 0.05); }

/* Playful custom buttons */
.btn-kids {
  font-weight: 700;
  font-size: 1.25rem;
  border-radius: 20px;
  padding: 0.8rem 1.8rem;
  border: 3px solid transparent;
  box-shadow: 0 8px 0px rgba(0,0,0,0.15);
  transition: all 0.15s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  top: 0;
}
.btn-kids:hover {
  transform: translateY(-3px);
  box-shadow: 0 11px 0px rgba(0,0,0,0.15);
}
.btn-kids:active {
  top: 6px;
  transform: translateY(0);
  box-shadow: 0 2px 0px rgba(0,0,0,0.15);
}

.btn-kids-blue { background-color: var(--kids-blue); color: white; }
.btn-kids-red { background-color: var(--kids-red); color: white; }
.btn-kids-orange { background-color: var(--kids-orange); color: white; }

/* Theme switch circular toggler */
.theme-switch {
  cursor: pointer;
  background: var(--card-bg);
  border: 3px solid var(--card-border);
  border-radius: 50%;
  width: 55px;
  height: 55px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: 0 6px 12px rgba(0,0,0,0.06);
  transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.theme-switch:hover {
  transform: scale(1.1) rotate(20deg);
}

/* ==========================================
   STORY READER CONTENT STYLING
   ========================================== */
.story-text-board {
  font-size: 2.2rem;
  font-weight: 500;
  line-height: 1.7;
  text-align: left;
  padding: 0.5rem;
  user-select: none;
  letter-spacing: 0.5px;
}

[data-theme="dark"] .story-text-board {
  color: #F8FAFC;
}

.story-word {
  display: inline-block;
  cursor: pointer;
  border-radius: 8px;
  padding: 0 4px;
  margin: 0 2px;
  transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.story-word:hover {
  background-color: rgba(53, 167, 255, 0.15);
  color: var(--kids-blue);
  transform: translateY(-2px) scale(1.05);
}

/* Active TTS spoken word highlighting */
.story-word.highlight-red {
  color: var(--kids-red) !important;
  font-weight: 800 !important;
}

/* Float Animation for SVGs */
.cloud-svg {
  filter: drop-shadow(0px 8px 10px rgba(0, 0, 0, 0.05));
  animation: floatCloud 4s ease-in-out infinite alternate;
}
@keyframes floatCloud {
  from { transform: translateY(0); }
  to { transform: translateY(-6px); }
}

/* Layout container wraps */
.story-container {
  max-width: 800px;
}

@media (max-height: 750px) {
  .story-text-board {
    font-size: 1.7rem;
    line-height: 1.5;
  }
  .kids-card {
    padding: 1rem !important;
    border-radius: 20px !important;
  }
  .cloud-svg {
    width: 100px !important;
    height: 65px !important;
  }
}

@media (max-width: 576px) {
  .story-text-board {
    font-size: 1.5rem;
    line-height: 1.5;
  }
  .app-logo {
    font-size: 1.75rem;
  }
  .btn-kids {
    font-size: 1.05rem !important;
    padding: 0.5rem 1rem !important;
    border-radius: 12px !important;
  }
  .theme-switch {
    width: 42px;
    height: 42px;
    font-size: 1.2rem;
  }
  .selection-card {
    padding: 0.75rem !important;
    border-radius: 16px !important;
  }
}