/* K-pop Daemon Hunters Theme - English Learning App */

@import url('https://fonts.googleapis.com/css2?family=Fredoka:wght@400;500;600;700&family=Outfit:wght@400;600;700&display=swap');

:root {
  /* K-pop Daemon Hunters Color Palette */
  --primary-purple: #9333ea;
  --primary-pink: #ec4899;
  --primary-cyan: #06b6d4;
  --accent-gold: #fbbf24;
  --accent-violet: #7c3aed;
  --dark-bg: #0f0a1f;
  --card-bg: rgba(30, 20, 50, 0.8);
  --success-green: #10b981;
  --error-red: #ef4444;
  --text-light: #f8fafc;
  --text-muted: #cbd5e1;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary-purple) 0%, var(--primary-pink) 100%);
  --gradient-accent: linear-gradient(135deg, var(--primary-cyan) 0%, var(--accent-violet) 100%);
  --gradient-mystical: linear-gradient(135deg, #9333ea 0%, #ec4899 50%, #06b6d4 100%);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(147, 51, 234, 0.2);
  --shadow-md: 0 4px 16px rgba(147, 51, 234, 0.3);
  --shadow-lg: 0 8px 32px rgba(147, 51, 234, 0.4);
  --shadow-glow: 0 0 20px rgba(236, 72, 153, 0.5);
}

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

body {
  font-family: 'Fredoka', sans-serif;
  background: var(--dark-bg);
  color: var(--text-light);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* Static Background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 20% 30%, rgba(147, 51, 234, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(236, 72, 153, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
  z-index: -1;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-lg);
}

/* Header */
header {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  position: relative;
}

.app-title {
  font-size: 3rem;
  font-weight: 700;
  background: var(--gradient-mystical);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-sm);
}

.app-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  font-family: 'Outfit', sans-serif;
}

/* Score Display */
.score-container {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  flex-wrap: wrap;
}

.score-card {
  background: var(--card-bg);
  border: 2px solid rgba(147, 51, 234, 0.3);
  border-radius: var(--radius-md);
  padding: var(--spacing-md) var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

.score-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-xs);
}

.score-value {
  font-size: 2rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Activity Selector */
.activity-selector {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
  flex-wrap: wrap;
}

.activity-btn {
  font-family: 'Fredoka', sans-serif;
  font-size: 1.125rem;
  font-weight: 600;
  padding: var(--spacing-md) var(--spacing-xl);
  border: none;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: var(--text-light);
  cursor: pointer;
  box-shadow: var(--shadow-md);
}

.activity-btn:hover {
  box-shadow: var(--shadow-lg);
}

.activity-btn.active {
  background: var(--gradient-accent);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

/* Card Styles */
.card {
  background: var(--card-bg);
  border: 2px solid rgba(147, 51, 234, 0.3);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
  margin: var(--spacing-lg) 0;
}

/* Multiple Choice */
.question-container {
  max-width: 800px;
  margin: 0 auto;
}

/* Character overlay - slides in from right */
.character-overlay {
  position: fixed;
  top: 0;
  right: -100%;
  width: 300px;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  pointer-events: none;
  transition: right 0.4s ease-out;
}

.character-overlay.show {
  right: 20px;
}

.character-overlay img {
  max-width: 100%;
  max-height: 400px;
  object-fit: contain;
  filter: drop-shadow(0 10px 30px rgba(147, 51, 234, 0.6));
  animation: bounce 0.6s ease-out;
}

@keyframes bounce {
  0% {
    transform: scale(0.3) translateX(100px);
    opacity: 0;
  }
  60% {
    transform: scale(1.1);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.question-text {
  font-size: 1.75rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: var(--text-light);
}

.choices-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.choice-btn {
  font-family: 'Fredoka', sans-serif;
  font-size: 1.125rem;
  font-weight: 500;
  padding: var(--spacing-md);
  border: 2px solid rgba(147, 51, 234, 0.5);
  border-radius: var(--radius-md);
  background: rgba(30, 20, 50, 0.6);
  color: var(--text-light);
  cursor: pointer;
}

.choice-btn:hover {
  background: rgba(147, 51, 234, 0.3);
  border-color: var(--primary-pink);
}

.choice-btn.correct {
  background: var(--success-green);
  border-color: var(--success-green);
  animation: correctPulse 0.5s ease;
}

.choice-btn.incorrect {
  background: var(--error-red);
  border-color: var(--error-red);
  animation: shake 0.5s ease;
}

.choice-btn:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

@keyframes correctPulse {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.05);
  }
}

@keyframes shake {

  0%,
  100% {
    transform: translateX(0);
  }

  25% {
    transform: translateX(-10px);
  }

  75% {
    transform: translateX(10px);
  }
}

/* Feedback Message - Elegant inline banner */
.feedback {
  text-align: center;
  font-size: 1.25rem;
  font-weight: 600;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin: 0 0 var(--spacing-lg) 0;
  border: 2px solid;
  animation: slideDown 0.3s ease;
}

.feedback.correct {
  color: var(--success-green);
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--success-green);
}

.feedback.incorrect {
  color: var(--error-red);
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--error-red);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Next Button */
.next-btn {
  font-family: 'Fredoka', sans-serif;
  font-size: 1.125rem;
  font-weight: 600;
  padding: var(--spacing-md) var(--spacing-xl);
  border: none;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
  color: var(--text-light);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  display: block;
  margin: var(--spacing-lg) auto;
}

.next-btn:hover {
  opacity: 0.9;
}

/* Image Matching */
.matching-container {
  max-width: 1000px;
  margin: 0 auto;
}

.matching-instructions {
  text-align: center;
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-xl);
}

.matching-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.match-item {
  background: var(--card-bg);
  border: 2px solid rgba(147, 51, 234, 0.3);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-align: center;
  position: relative;
}

.draggable-word {
  cursor: grab !important;
  user-select: none;
  -webkit-user-select: none;
  -webkit-user-drag: element;
}

.draggable-word:active {
  cursor: grabbing !important;
}

.match-item.dragging {
  opacity: 0.5;
}

.match-item.matched {
  background: rgba(16, 185, 129, 0.2);
  border-color: var(--success-green);
  animation: matchSuccess 0.5s ease;
}

@keyframes matchSuccess {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.1);
  }
}

.match-image {
  width: 100%;
  height: 150px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-sm);
  background: rgba(147, 51, 234, 0.1);
  pointer-events: none;
  user-select: none;
  -webkit-user-select: none;
}

.match-word {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-light);
  padding: var(--spacing-sm);
  background: rgba(147, 51, 234, 0.2);
  border-radius: var(--radius-sm);
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  user-select: none;
  -webkit-user-select: none;
}

.drop-zone {
  border: 2px dashed rgba(147, 51, 234, 0.5);
  background: rgba(147, 51, 234, 0.1);
  min-height: 50px;
  cursor: default;
  pointer-events: auto;
}

.drop-zone.drag-over {
  border-color: var(--primary-pink);
  background: rgba(236, 72, 153, 0.2);
  box-shadow: var(--shadow-glow);
}

/* Touch Clone for Mobile Drag */
.touch-clone {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transition: none;
}

/* Hidden Class */
.hidden {
  display: none !important;
}

/* Responsive Design */
@media (max-width: 768px) {
  .app-title {
    font-size: 2rem;
  }

  .app-subtitle {
    font-size: 1rem;
  }

  .score-container {
    gap: var(--spacing-sm);
  }

  .score-card {
    padding: var(--spacing-sm) var(--spacing-md);
  }

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

  .activity-btn {
    font-size: 1rem;
    padding: var(--spacing-sm) var(--spacing-lg);
  }

  .question-text {
    font-size: 1.5rem;
  }

  .choices-grid {
    grid-template-columns: 1fr;
  }

  .matching-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }

  .match-image {
    height: 100px;
  }

  .match-word {
    font-size: 1.125rem;
    padding: var(--spacing-sm);
  }

  /* Better touch targets for mobile */
  .match-item {
    min-height: 80px;
  }

  .draggable-word {
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
  }

  /* Character overlay mobile adjustments */
  .character-overlay {
    width: 200px;
  }

  .character-overlay.show {
    right: 10px;
  }

  .character-overlay img {
    max-height: 250px;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}