/* ============================================================
   MacCMS 2025 · Skeleton Screen System
   骨架屏动画 · 6种组件形态 · 全局加载态
   ============================================================ */

/* ── 基础脉冲动画 ── */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-card) 25%,
    var(--bg-hover, #1E1E32) 37%,
    var(--bg-card) 63%
  );
  background-size: 400% 100%;
  animation: skeleton-pulse 1.4s ease infinite;
  border-radius: var(--radius-sm, 0.375rem);
  pointer-events: none;
  user-select: none;
}

@keyframes skeleton-pulse {
  0%   { background-position: 100% 50%; }
  100% { background-position: 0 50%; }
}

/* ── prefers-reduced-motion: 关闭动画 ── */
@media (prefers-reduced-motion: reduce) {
  .skeleton {
    animation: none;
  }
}

/* ── 骨架容器 ── */
.skeleton-container {
  position: relative;
}

/* ── 组件形态定制 ── */
.skeleton--card {
  aspect-ratio: 2 / 3;
  border-radius: var(--radius-md, 0.75rem);
}

.skeleton--hero {
  height: clamp(55vh, 85vh, 85vh);
  border-radius: 0;
}

.skeleton--bento-xl {
  aspect-ratio: 4 / 3;
  grid-column: span 2;
  grid-row: span 2;
  border-radius: var(--radius-lg, 1.125rem);
}

.skeleton--bento-wide {
  aspect-ratio: 16 / 7;
  grid-column: span 2;
  border-radius: var(--radius-md, 0.75rem);
}

.skeleton--bento-md {
  aspect-ratio: 2 / 3;
  border-radius: var(--radius-md, 0.75rem);
}

.skeleton--text {
  height: 1em;
  width: 80%;
  margin-bottom: 0.5em;
}

.skeleton--title {
  height: 1.5em;
  width: 60%;
  margin-bottom: 0.75em;
}

.skeleton--meta {
  height: 0.8em;
  width: 40%;
}

.skeleton--avatar {
  width: clamp(48px, 8vw, 64px);
  height: clamp(48px, 8vw, 64px);
  border-radius: var(--radius-full, 50%);
}

.skeleton--button {
  height: 44px;
  width: 140px;
  border-radius: 22px;
}

/* ── 尺寸变体 ── */
.skeleton--sm { height: 0.6em; }
.skeleton--lg { height: 2em; width: 90%; }

/* ── 交错动画延迟 ── */
.skeleton--delay-1 { animation-delay: 0.1s; }
.skeleton--delay-2 { animation-delay: 0.2s; }
.skeleton--delay-3 { animation-delay: 0.3s; }
.skeleton--delay-4 { animation-delay: 0.4s; }
.skeleton--delay-5 { animation-delay: 0.5s; }