.skeleton {
  background: linear-gradient(90deg, var(--color-surface-alt) 0%, var(--color-border) 50%, var(--color-surface-alt) 100%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.4s infinite;
  border-radius: var(--radius-sm);
}
.skeleton-text  { height: 1em; margin: 0.4em 0; }
.skeleton-circle { border-radius: 50%; }
@keyframes skeleton-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}