/**
 * Skeleton Loaders
 * Provides loading placeholders for better perceived performance
 */

.skeleton {
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.05) 0%,
    rgba(255, 255, 255, 0.1) 50%,
    rgba(255, 255, 255, 0.05) 100%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: 8px;
  position: relative;
  overflow: hidden;
}

.skeleton-line {
  height: 1em;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.05) 0%,
    rgba(255, 255, 255, 0.1) 50%,
    rgba(255, 255, 255, 0.05) 100%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: 4px;
  margin-bottom: 0.5rem;
}

.skeleton-circle {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.05) 0%,
    rgba(255, 255, 255, 0.1) 50%,
    rgba(255, 255, 255, 0.05) 100%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
}

.skeleton-rectangle {
  height: 100px;
  border-radius: 8px;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.05) 0%,
    rgba(255, 255, 255, 0.1) 50%,
    rgba(255, 255, 255, 0.05) 100%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
}

@keyframes skeleton-loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* Metric widget skeleton */
.metric-widget.skeleton {
  min-height: 150px;
  padding: 1.5rem;
}

.metric-widget.skeleton .skeleton-line:first-child {
  width: 60%;
  height: 1.5em;
  margin-bottom: 1rem;
}

.metric-widget.skeleton .skeleton-line:nth-child(2) {
  width: 40%;
  height: 2em;
}

/* Dashboard skeleton */
.dashboard-grid.skeleton {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  padding: 2rem 0;
}

/* Network topology skeleton */
.network-topology-section.skeleton {
  min-height: 600px;
  padding: 2rem;
}

.network-topology-section.skeleton .skeleton-rectangle {
  width: 100%;
  height: 500px;
  margin: 2rem 0;
}

/* Project card skeleton */
.project-card.skeleton {
  min-height: 300px;
  padding: 1.5rem;
}

.project-card.skeleton .skeleton-line {
  margin-bottom: 0.75rem;
}

/* GitHub stats skeleton */
.github-section.skeleton {
  padding: 2rem 0;
}

.github-section.skeleton .skeleton-rectangle {
  height: 200px;
  margin-bottom: 1rem;
}

/* Hide skeleton when content loads */
.skeleton.loaded {
  display: none;
}

.content-loaded .skeleton {
  display: none;
}