.skeleton {
  background: linear-gradient(90deg, rgba(18, 38, 68, 0.5) 25%, rgba(0, 210, 255, 0.1) 50%, rgba(18, 38, 68, 0.5) 75%);
  background-size: 200% 100%;
  animation: skeletonPulse 1.5s infinite linear;
  border-radius: 4px;
  border: 1px solid rgba(0, 210, 255, 0.05);
}

.skeleton-card {
  background: var(--bg-panel);
  border: var(--border-neon);
  border-radius: var(--border-radius-md);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.skeleton-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
}

.skeleton-text-lg {
  height: 24px;
  width: 60%;
  margin-top: 1rem;
}

.skeleton-text-sm {
  height: 12px;
  width: 40%;
}

.skeleton-progress {
  height: 8px;
  width: 100%;
  border-radius: 4px;
  margin-top: 1rem;
}

/* Skeleton Flashcard Loader */
.skeleton-quiz {
  max-width: 700px;
  width: 100%;
  margin: 0 auto;
}

.skeleton-question {
  height: 32px;
  width: 90%;
  margin-bottom: 1.5rem;
}

.skeleton-image {
  height: 200px;
  width: 100%;
  border-radius: var(--border-radius-sm);
  margin-bottom: 1.5rem;
}

.skeleton-option {
  height: 56px;
  width: 100%;
  border-radius: var(--border-radius-md);
  margin-bottom: 0.85rem;
}