:root {
  /* Color Palette - Soft, child-friendly colors */
  --color-bg: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
  --color-primary: #ff6b9d;
  --color-secondary: #c44dff;
  --color-accent: #ffd93d;
  --color-success: #6bcb77;
  --color-text: #2d3436;
  --color-text-light: #636e72;
  --color-white: #ffffff;
  --color-shadow: rgba(0, 0, 0, 0.1);
  
  /* Sizes */
  --button-size-large: 120px;
  --button-size-medium: 80px;
  --touch-target-min: 48px;
  --border-radius: 20px;
  --border-radius-large: 30px;
  
  /* Typography */
  --font-family: 'Outfit', 'Segoe UI', system-ui, sans-serif;
  --font-size-huge: 3rem;
  --font-size-large: 1.75rem;
  --font-size-medium: 1.25rem;
  --font-size-normal: 1rem;
  
  /* Animations */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-bounce: 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  overflow: hidden;
  touch-action: manipulation;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* Main Container */
.container {
  width: 100%;
  max-width: 600px;
  padding: 20px;
  text-align: center;
}

/* Typography */
h1 {
  font-size: var(--font-size-huge);
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
  text-shadow: 2px 2px 4px var(--color-shadow);
}

h2 {
  font-size: var(--font-size-large);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 20px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: var(--touch-target-min);
  min-height: var(--touch-target-min);
  padding: 15px 30px;
  border: none;
  border-radius: var(--border-radius);
  font-family: var(--font-family);
  font-size: var(--font-size-medium);
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-bounce), box-shadow var(--transition-normal);
  text-decoration: none;
}

.btn:active {
  transform: scale(0.95);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #ff8fab);
  color: var(--color-white);
  box-shadow: 0 8px 25px rgba(255, 107, 157, 0.4);
}

.btn-primary:hover {
  transform: scale(1.05);
  box-shadow: 0 12px 35px rgba(255, 107, 157, 0.5);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--color-secondary), #d77bff);
  color: var(--color-white);
  box-shadow: 0 8px 25px rgba(196, 77, 255, 0.4);
}

.btn-back {
  position: fixed;
  top: 20px;
  left: 20px;
  width: 60px;
  height: 60px;
  padding: 0;
  border-radius: 50%;
  background: var(--color-white);
  color: var(--color-primary);
  box-shadow: 0 4px 15px var(--color-shadow);
  font-size: 1.5rem;
  z-index: 100;
}

/* Game Cards */
.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.game-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1;
  background: var(--color-white);
  border-radius: var(--border-radius-large);
  box-shadow: 0 10px 40px var(--color-shadow);
  cursor: pointer;
  transition: transform var(--transition-bounce), box-shadow var(--transition-normal);
  text-decoration: none;
  color: var(--color-text);
  padding: 20px;
}

.game-card:hover, .game-card:active {
  transform: scale(1.05) translateY(-5px);
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.15);
}

.game-card-icon {
  font-size: 4rem;
  margin-bottom: 10px;
}

.game-card-title {
  font-size: var(--font-size-medium);
  font-weight: 600;
}

/* Difficulty Selector */
.difficulty-selector {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin: 20px 0;
  flex-wrap: wrap;
}

.difficulty-btn {
  padding: 12px 24px;
  border: 3px solid transparent;
  border-radius: 50px;
  background: var(--color-white);
  color: var(--color-text);
  font-weight: 600;
  transition: all var(--transition-normal);
}

.difficulty-btn.active {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, var(--color-primary), #ff8fab);
  color: var(--color-white);
}

.difficulty-btn[data-level="easy"] { --dot-color: var(--color-success); }
.difficulty-btn[data-level="medium"] { --dot-color: var(--color-accent); }
.difficulty-btn[data-level="hard"] { --dot-color: var(--color-primary); }

/* Game Canvas Container */
.game-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 50%, #a5d6a7 100%);
}

#gameCanvas {
  display: block;
  touch-action: none;
}

/* Score Display */
.score-display {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--color-white);
  padding: 15px 25px;
  border-radius: 50px;
  box-shadow: 0 4px 15px var(--color-shadow);
  font-size: var(--font-size-large);
  font-weight: 700;
  color: var(--color-primary);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 10px;
}

.score-icon {
  font-size: 1.5rem;
}

/* Animations */
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

@keyframes sparkle {
  0% { opacity: 1; transform: scale(0) rotate(0deg); }
  50% { opacity: 1; transform: scale(1.2) rotate(180deg); }
  100% { opacity: 0; transform: scale(0) rotate(360deg); }
}

.bounce {
  animation: bounce 0.6s ease infinite;
}

.pulse {
  animation: pulse 1s ease infinite;
}

/* Responsive */
@media (max-width: 480px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.25rem;
  }
  
  .game-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
  }
  
  .game-card-icon {
    font-size: 3rem;
  }
  
  .btn-back {
    width: 50px;
    height: 50px;
    font-size: 1.2rem;
  }
  
  .score-display {
    padding: 10px 18px;
    font-size: 1.25rem;
  }
}

/* Safe area for notched devices */
@supports (padding: max(0px)) {
  .btn-back {
    top: max(20px, env(safe-area-inset-top));
    left: max(20px, env(safe-area-inset-left));
  }
  
  .score-display {
    top: max(20px, env(safe-area-inset-top));
    right: max(20px, env(safe-area-inset-right));
  }
}