/* Flipable Cards */
.transformation-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.flip-card {
  background-color: transparent;
  width: 100%;
  height: 300px;
  perspective: 1000px;
  cursor: pointer;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.6s;
  transform-style: preserve-3d;
}

.flip-card.flipped .flip-card-inner {
  transform: rotateY(180deg);
}

.flip-card-front, .flip-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 12px;
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.flip-card-front {
  background: linear-gradient(135deg, var(--logo-golden-yellow), var(--logo-vibrant-light-blue));
  color: white;
  border: 2px solid var(--logo-golden-yellow);
}

.flip-card-back {
  background: var(--card-bg-color);
  color: var(--text-color);
  border: 2px solid var(--border-color);
  transform: rotateY(180deg);
  text-align: left;
}

.card-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
}

.flip-card-front .card-icon {
  color: white;
}

.flip-card-front .card-icon i {
  color: white;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.flip-card-back .card-icon {
  color: var(--logo-vibrant-light-blue);
  margin-bottom: var(--spacing-sm);
}

.flip-card-front h4 {
  font-size: 1.5rem;
  margin: var(--spacing-sm) 0;
  font-weight: 600;
}

.flip-card-front p {
  font-size: 0.9rem;
  opacity: 0.9;
}

.flip-card-back h4 {
  font-size: 1.3rem;
  margin: 0 0 var(--spacing-sm) 0;
  color: var(--logo-vibrant-light-blue);
  text-align: center;
}

.flip-card-back p {
  line-height: 1.6;
  margin-bottom: var(--spacing-sm);
}

.learning-tip {
  background: rgba(251, 191, 36, 0.1);
  border-left: 3px solid var(--logo-golden-yellow);
  padding: var(--spacing-sm);
  border-radius: 6px;
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-xs);
}

.learning-tip .bi {
  color: var(--logo-golden-yellow);
  font-size: 1.1rem;
  margin-top: 0.1rem;
  flex-shrink: 0;
}

.learning-tip span {
  font-size: 0.85rem;
  line-height: 1.4;
  font-style: italic;
}

/* Word Insight Display */
.word-insight-detail {
  padding: var(--spacing-md);
}

.word-insight-detail h3 {
  color: var(--logo-golden-yellow);
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.insight-section {
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  border-left: 3px solid var(--logo-vibrant-light-blue);
}

.insight-section h4 {
  color: var(--logo-vibrant-light-blue);
  margin-bottom: var(--spacing-xs);
  font-size: 1rem;
}

.insight-section p {
  line-height: 1.6;
  margin: 0;
}

/* Word Badges */
.word-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.word-badge {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-speed) ease;
  display: inline-block;
}

.word-badge:hover {
  background: var(--logo-golden-yellow);
  color: var(--bg-color);
  transform: scale(1.05);
  border-color: var(--logo-golden-yellow);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .transformation-cards {
    grid-template-columns: 1fr;
  }
  
  .flip-card {
    height: 250px;
  }
}