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

:root {
  /* Kids Theme Light Mode Colors */
  --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;
  
  /* Bouncy Pastel Colors */
  --kids-red: #FF5964;
  --kids-blue: #35A7FF;
  --kids-yellow: #FFC107;
  --kids-green: #8CB369;
  --kids-purple: #9B5DE5;
  --kids-pink: #F15BB5;
  --kids-orange: #F4A261;
  
  --glow-color: rgba(255, 193, 7, 0.3);
  --transition-speed: 0.3s;
}

[data-theme="dark"] {
  /* Kids Theme Dark Mode Colors */
  --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;
  
  /* Neon versions for dark mode */
  --kids-red: #FF6B6B;
  --kids-blue: #38BDF8;
  --kids-yellow: #FBBF24;
  --kids-green: #4ADE80;
  --kids-purple: #C084FC;
  --kids-pink: #F472B6;
  --kids-orange: #FB923C;
  
  --glow-color: rgba(56, 189, 248, 0.4);
}

* {
  box-sizing: border-box;
}

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;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

/* Glassmorphism Panel Wrapper */
.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, 0.08);
  padding: 2.5rem;
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

/* App Logo Title */
.app-logo {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: 1px;
  text-shadow: 2px 2px 0px rgba(0,0,0,0.05);
}

/* Language & Level Cards */
.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);
  position: relative;
  overflow: hidden;
}

.selection-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 16px 24px rgba(0, 0, 0, 0.12);
}

.selection-card:active {
  transform: scale(0.97);
}

/* Color thematic borders for selections */
.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 Buttons styling */
.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-lg {
  font-size: 1.8rem;
  padding: 1rem 2.5rem;
  border-radius: 28px;
}

/* Button Thematics */
.btn-kids-red { background-color: var(--kids-red); color: white; }
.btn-kids-blue { background-color: var(--kids-blue); color: white; }
.btn-kids-yellow { background-color: var(--kids-yellow); color: #2C3E50; }
.btn-kids-green { background-color: var(--kids-green); color: white; }
.btn-kids-purple { background-color: var(--kids-purple); color: white; }
.btn-kids-pink { background-color: var(--kids-pink); color: white; }

/* The Main Word Dashboard Viewport */
.playground-container {
  max-width: 900px;
}

.word-card-wrapper {
  perspective: 1000px;
}

.word-card {
  min-height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border-radius: 32px;
  background: var(--card-bg);
  border: 4px solid var(--card-border);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  padding: 2rem;
  position: relative;
  transition: transform 0.4s ease, border-color var(--transition-speed) ease;
}

/* Word visual rendering */
.display-word-container {
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  align-items: center;
  margin: 1rem 0;
  gap: 2px;
  width: 100%;
}

.display-word-letter {
  font-size: clamp(2.8rem, 7vw, 6.5rem);
  font-weight: 800;
  color: var(--text-main);
  transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275), color 0.2s ease;
  display: inline-block;
  user-select: none;
  white-space: nowrap;
}

/* Highlight letter animation during speaking */
.display-word-letter.highlight-active {
  color: var(--kids-red) !important;
  transform: scale(1.3) translateY(-10px);
  text-shadow: 0 0 20px rgba(255, 89, 100, 0.4);
}

.display-word-letter.highlight-active-syllable {
  color: var(--kids-blue) !important;
  transform: scale(1.15) translateY(-5px);
  text-shadow: 0 0 15px rgba(53, 167, 255, 0.4);
}

/* Language Specific Overrides for Large Fonts */
.lang-hi .display-word-letter, .lang-or .display-word-letter {
  font-size: 5.5rem;
  font-weight: 700;
}

/* Word Image Illustration Wrapper */
.word-image-wrapper {
  width: 180px;
  height: 180px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.9);
  padding: 12px;
  box-shadow: inset 0 4px 10px rgba(0,0,0,0.05), 0 8px 16px rgba(0,0,0,0.05);
  margin-bottom: 1.5rem;
  transition: transform var(--transition-speed) ease;
}

[data-theme="dark"] .word-image-wrapper {
  background: rgba(15, 23, 42, 0.5);
}

.word-image-wrapper:hover {
  transform: scale(1.05) rotate(3deg);
}

.word-svg {
  width: 100%;
  height: 100%;
  border-radius: 12px;
  object-fit: contain;
}

.translation-label {
  font-size: 1.5rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: -0.5rem;
  margin-bottom: 1rem;
}

/* Syllable Split Markers */
.syllable-badge {
  background: rgba(0, 0, 0, 0.05);
  border-radius: 12px;
  padding: 4px 12px;
  font-size: 1rem;
  color: var(--text-muted);
  margin: 0 4px;
  font-weight: 600;
}

[data-theme="dark"] .syllable-badge {
  background: rgba(255, 255, 255, 0.08);
}

/* Progress Tracking Components */
.kids-progress-container {
  background: var(--bg-secondary);
  border-radius: 20px;
  height: 28px;
  padding: 4px;
  position: relative;
  box-shadow: inset 0 2px 6px rgba(0,0,0,0.1);
}

.kids-progress-bar {
  background: linear-gradient(90deg, var(--kids-green), var(--kids-blue));
  height: 100%;
  border-radius: 16px;
  transition: width 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
}

.kids-progress-avatar {
  position: absolute;
  right: -10px;
  top: -12px;
  font-size: 1.8rem;
  filter: drop-shadow(0px 2px 2px rgba(0,0,0,0.15));
  animation: bounce 1.5s infinite alternate;
}

/* Star/Fav Indicator toggle */
.fav-btn {
  font-size: 2.2rem;
  color: #BDC3C7;
  cursor: pointer;
  transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275), color 0.2s ease;
  background: none;
  border: none;
  padding: 0;
}

.fav-btn:hover {
  transform: scale(1.2);
}

.fav-btn.is-favorite {
  color: var(--kids-yellow);
  animation: pulse-glow 1s infinite alternate;
}

/* Stats Counter Badges */
.stat-pill {
  background: var(--card-bg);
  border: 3px solid var(--card-border);
  border-radius: 20px;
  padding: 0.5rem 1.2rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  box-shadow: 0 4px 8px rgba(0,0,0,0.05);
}

/* Dark/Light Toggle Button */
.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(0,0,0,0.08);
  transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.theme-switch:hover {
  transform: scale(1.1) rotate(20deg);
}

.theme-switch:active {
  transform: scale(0.95);
}

/* Parent settings gate screen styling */
.parent-lock-modal {
  border-radius: 28px;
  border: 4px solid var(--kids-purple);
  background-color: var(--bg-primary);
}

.parent-lock-input {
  border-radius: 16px;
  border: 3px solid var(--kids-purple);
  font-size: 2rem;
  font-weight: bold;
  text-align: center;
  max-width: 150px;
  outline: none;
}

.parent-lock-input:focus {
  box-shadow: 0 0 10px rgba(155, 93, 229, 0.5);
}

/* Celebration Overlay Canvas */
#celebration-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1060;
}

/* Layout header controls container */
.kids-nav {
  min-height: 80px;
}

/* Animations */
@keyframes bounce {
  from { transform: translateY(0); }
  to { transform: translateY(-5px); }
}

@keyframes pulse-glow {
  from { filter: drop-shadow(0 0 2px var(--kids-yellow)); }
  to { filter: drop-shadow(0 0 8px var(--kids-yellow)); }
}

/* CSS transitions for views */
.view-section {
  display: none;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.view-section.active-view {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

/* Autoplay active state glowing pulse on word card border */
.word-card.autoplay-active {
  animation: border-glow-pulse 2s infinite alternate;
}

@keyframes border-glow-pulse {
  from {
    border-color: var(--card-border);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  }
  to {
    border-color: var(--kids-blue);
    box-shadow: 0 20px 40px rgba(53, 167, 255, 0.3);
  }
}

/* Parent Screen specific styles */
.settings-header {
  border-bottom: 3px dashed var(--kids-purple);
  padding-bottom: 1rem;
}

.settings-card {
  border-radius: 20px;
  border: 3px solid var(--card-border);
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.4);
}

[data-theme="dark"] .settings-card {
  background: rgba(30, 41, 59, 0.4);
}

/* Confetti Overlay and Success Celebrations */
.celebration-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  z-index: 1055;
  justify-content: center;
  align-items: center;
  color: white;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.celebration-overlay.show {
  display: flex;
  opacity: 1;
}

.celebration-box {
  background: linear-gradient(135deg, var(--kids-purple), var(--kids-pink));
  border-radius: 40px;
  border: 6px solid #FFF;
  box-shadow: 0 24px 48px rgba(0,0,0,0.3);
  padding: 3rem;
  text-align: center;
  transform: scale(0.7);
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.celebration-overlay.show .celebration-box {
  transform: scale(1);
}

.celebration-emoji {
  font-size: 5rem;
  animation: bounce-rotate 1s infinite alternate;
  display: inline-block;
  margin-bottom: 1rem;
}

@keyframes bounce-rotate {
  from { transform: translateY(0) rotate(-10deg); }
  to { transform: translateY(-15px) rotate(10deg); }
}

/* Navigation layout responsive grids */
.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.5rem;
}

/* Letter highlighting configurations */
.syllable-split-view {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 1rem;
}

/* Height-based media query for smaller vertical viewports */
@media (max-height: 780px) {
  body {
    background-size: 40px 40px;
    background-position: 0 0, 20px 20px;
  }
  .kids-nav {
    min-height: 60px;
    margin-bottom: 0.5rem !important;
  }
  .app-logo {
    font-size: 2rem;
  }
  .stat-pill {
    padding: 0.35rem 0.8rem;
  }
  .theme-switch {
    width: 45px;
    height: 45px;
    font-size: 1.25rem;
  }
  .mb-4, .my-4 {
    margin-bottom: 0.4rem !important;
  }
  .mb-5 {
    margin-bottom: 0.5rem !important;
  }
  .mt-4, .my-4 {
    margin-top: 0.4rem !important;
  }
  .py-4 {
    padding-top: 0.4rem !important;
    padding-bottom: 0.4rem !important;
  }
  .p-3 {
    padding: 0.4rem !important;
  }
  .p-4 {
    padding: 0.6rem !important;
  }
  .kids-card {
    padding: 0.6rem 1rem !important;
    border-radius: 18px !important;
    border-width: 2.5px !important;
  }
  .word-card {
    min-height: 200px !important;
    padding: 0.75rem !important;
    border-radius: 20px !important;
  }
  .word-image-wrapper {
    width: 90px !important;
    height: 90px !important;
    margin-bottom: 0.35rem !important;
    border-radius: 14px !important;
    padding: 6px !important;
  }
  .display-word-letter {
    font-size: 3.2rem !important;
  }
  .lang-hi .display-word-letter, .lang-or .display-word-letter {
    font-size: 2.5rem !important;
  }
  .translation-label {
    font-size: 1rem !important;
    margin-top: -0.25rem !important;
    margin-bottom: 0.25rem !important;
  }
  .syllable-badge {
    font-size: 0.85rem !important;
    padding: 2px 8px !important;
    border-radius: 8px !important;
  }
  .kids-progress-container {
    height: 18px !important;
    border-radius: 12px !important;
  }
  .kids-progress-avatar {
    font-size: 1.25rem !important;
    top: -8px !important;
  }
  .btn-kids {
    font-size: 1.1rem !important;
    padding: 0.5rem 1.2rem !important;
  }
  .btn-kids-lg {
    font-size: 1.4rem !important;
  }
  footer {
    display: none !important; /* Hide footer to save vertical height on tiny screens */
  }
}

/* Mobile responsive styles */
@media (max-width: 576px) {
  body {
    background-size: 30px 30px;
    background-position: 0 0, 15px 15px;
  }
  .kids-nav {
    min-height: 50px;
    margin-bottom: 0.25rem !important;
  }
  .app-logo {
    font-size: 1.8rem;
  }
  .stat-pill {
    padding: 0.25rem 0.6rem;
    font-size: 0.85rem;
  }
  .theme-switch {
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
  }
  .word-card {
    min-height: 220px !important;
    padding: 0.5rem !important;
    border-radius: 16px !important;
    border-width: 2.5px !important;
  }
  .word-image-wrapper {
    width: 80px !important;
    height: 80px !important;
    margin-bottom: 0.25rem !important;
    border-radius: 12px !important;
    padding: 4px !important;
  }
  .translation-label {
    font-size: 0.95rem !important;
    margin-top: -0.15rem !important;
    margin-bottom: 0.15rem !important;
  }
  .display-word-letter {
    font-size: clamp(1.8rem, 7.5vw, 4.5rem) !important;
  }
  .lang-hi .display-word-letter, .lang-or .display-word-letter {
    font-size: clamp(1.6rem, 7vw, 3.8rem) !important;
  }
  .syllable-badge {
    font-size: 0.8rem !important;
    padding: 2px 6px !important;
  }
  .btn-kids {
    font-size: 0.95rem !important;
    padding: 0.4rem 0.8rem !important;
    border-radius: 12px !important;
  }
  .btn-kids-lg {
    font-size: 1.2rem !important;
  }
  .kids-progress-container {
    height: 14px !important;
  }
  .kids-progress-avatar {
    font-size: 1.1rem !important;
    top: -6px !important;
  }
  .selection-card {
    padding: 0.8rem !important;
    border-radius: 16px !important;
  }
  .selection-card span.display-1 {
    font-size: 3rem !important;
  }
  .selection-card span.fs-1 {
    font-size: 2rem !important;
  }
  .selection-card h3 {
    font-size: 1.25rem !important;
  }
  .selection-card h4 {
    font-size: 1.1rem !important;
  }
  footer {
    display: none !important;
  }
}