/* TASK-002-01: Create Responsive CSS Framework */
/* Quiz Responsive Styles - Mobile-First Approach */

:root {
  /* Mobile-first breakpoints */
  --mobile-max: 767px;
  --tablet-min: 768px;
  --tablet-max: 1023px;
  --desktop-min: 1024px;

  /* Touch target minimums */
  --touch-target-min: 44px;

  /* Spacing scale */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;

  /* Enhanced color scheme */
  --primary-color: #007cba;
  --secondary-color: #f8f9fa;
  --text-color: #1a1a1a;
  --border-color: #e1e5e9;
  --success-color: #46b450;
  --error-color: #dc3232;
}

/* Mobile-first quiz container */
.quiz-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-md);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.5;
}

/* Responsive question cards */
.question-card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-lg);
  width: 100%;
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
}

.question-card:hover {
  box-shadow: 0 6px 16px rgba(0,0,0,0.12);
}

/* Enhanced question titles */
.question-title {
  font-size: clamp(1.125rem, 2.5vw, 1.25rem);
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-color);
  line-height: 1.3;
}

.question-description {
  font-size: clamp(0.875rem, 2vw, 1rem);
  color: #6c757d;
  margin-bottom: 1rem;
  line-height: 1.4;
}

/* Touch-friendly radio buttons - TASK-002-03 */
.quiz-radio {
  position: relative;
  display: flex;
  align-items: center;
  min-height: var(--touch-target-min);
  padding: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
  background: var(--secondary-color);
  border: 2px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.quiz-radio:hover {
  background: #e9ecef;
  border-color: var(--primary-color);
}

.quiz-radio:focus-within {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 123, 186, 0.25);
}

.quiz-radio input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: var(--touch-target-min);
  height: var(--touch-target-min);
  margin: 0;
  cursor: pointer;
}

.quiz-radio .radio-custom {
  width: 20px;
  height: 20px;
  border: 2px solid #6c757d;
  border-radius: 50%;
  margin-right: var(--spacing-sm);
  position: relative;
  flex-shrink: 0;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.quiz-radio input[type="radio"]:checked + .radio-custom {
  border-color: var(--primary-color);
  background: var(--primary-color);
}

.quiz-radio input[type="radio"]:checked + .radio-custom::after {
  content: '';
  width: 8px;
  height: 8px;
  background: white;
  border-radius: 50%;
}

.quiz-radio label {
  cursor: pointer;
  font-size: clamp(0.875rem, 2vw, 1rem);
  font-weight: 400;
  margin: 0;
  flex: 1;
  line-height: 1.4;
}

/* Progress indicators - TASK-002-06 */
.quiz-progress {
  background: white;
  border-radius: 8px;
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  border: 1px solid var(--border-color);
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: #e1e5e9;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: var(--spacing-sm);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), #005a87);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.progress-text {
  font-size: clamp(0.75rem, 1.5vw, 0.875rem);
  color: #6c757d;
  text-align: center;
}

/* Navigation buttons */
.quiz-navigation {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.quiz-button {
  flex: 1;
  min-height: var(--touch-target-min);
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: 8px;
  font-size: clamp(0.875rem, 2vw, 1rem);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.quiz-button.primary {
  background: var(--primary-color);
  color: white;
}

.quiz-button.primary:hover {
  background: #005a87;
  transform: translateY(-1px);
}

.quiz-button.secondary {
  background: white;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.quiz-button.secondary:hover {
  background: var(--primary-color);
  color: white;
}

/* Swipe feedback - TASK-002-04 */
.swipe-feedback {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 8px;
  font-size: 1.5rem;
  font-weight: bold;
  z-index: 1000;
  pointer-events: none;
  animation: fadeOut 0.3s ease-out 0.5s forwards;
}

@keyframes fadeOut {
  to {
    opacity: 0;
  }
}

/* Tablet styles */
@media (min-width: 768px) {
  .quiz-container {
    padding: var(--spacing-xl);
  }

  .question-card {
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
  }

  .quiz-navigation {
    justify-content: space-between;
  }

  .quiz-button {
    flex: none;
    min-width: 120px;
  }
}

/* Desktop styles */
@media (min-width: 1024px) {
  .quiz-container {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-xl);
  }

  .quiz-main {
    grid-column: 1;
  }

  .quiz-sidebar {
    grid-column: 2;
  }

  .question-card:hover {
    transform: translateY(-2px);
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .question-title {
    color: #000000;
  }

  .question-description {
    color: #000000;
  }

  .quiz-radio {
    border: 2px solid #000000;
  }

  .quiz-radio .radio-custom {
    border: 3px solid #000000;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .question-card,
  .quiz-button,
  .progress-fill,
  .swipe-feedback {
    transition: none;
    animation: none;
  }

  .quiz-button.primary:hover {
    transform: none;
  }
}