@keyframes pulse {
  0%,
  100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}

.skeleton,
.skeleton-grid > * {
  animation: pulse 1.8s infinite ease-in-out;
  background: var(--glass-bg);
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.skeleton-line {
  height: 1rem;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  margin: 1rem 0;
}

.skeleton-line.wide {
  width: 80%;
}
.skeleton-line.medium {
  width: 60%;
}
.skeleton-line.short {
  width: 50%;
}
.skeleton-line.shorter {
  width: 40%;
}
.skeleton-line.tall {
  height: 2rem;
}

.skeleton-image {
  height: 200px;
  background: var(--glass-bg);
  border-radius: var(--radius-lg);
  margin: 1.5rem 0;
}

.skeleton-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--spacing-lg);
}

#project-root .skeleton {
  padding: var(--spacing-xl);
  max-width: 900px;
  margin: 0 auto;
}

/* Responsive */
@media (max-width: 640px) {
  .skeleton-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
}