/* Crystal Zhang — 全屏开场动效覆盖层
 * 基于顶部导航 CZ logo 的 Line Draw + Bloom 动画
 * 默认 dark 风格，线条使用站点主文字渐变
 */

/* 动画播放期间完全隐藏首页内容，避免 404 等初始内容透过模糊层可见。 */
.is-intro-playing #root {
  opacity: 0;
  visibility: hidden;
  transform: none;
  filter: blur(9px) saturate(.82);
  pointer-events: none;
}

#root {
  transform-origin: 50% 35%;
  transition: opacity 0.62s cubic-bezier(0.16, 1, 0.3, 1),
              visibility 0.62s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.62s cubic-bezier(0.16, 1, 0.3, 1),
              filter 0.62s cubic-bezier(0.16, 1, 0.3, 1);
}

.is-intro-playing body {
  overflow: hidden;
}

#crystal-intro {
  position: fixed;
  inset: 0;
  z-index: 100000;
  background: rgba(8, 8, 10, .18);
  -webkit-backdrop-filter: blur(14px) saturate(.82);
  backdrop-filter: blur(14px) saturate(.82);
  opacity: 1;
  visibility: visible;
  transition: opacity 0.62s cubic-bezier(0.16, 1, 0.3, 1),
              visibility 0.62s cubic-bezier(0.16, 1, 0.3, 1);
}

.intro-theme-light #crystal-intro {
  background: rgba(248, 251, 250, .16);
}

.intro-theme-dark #crystal-intro {
  background: rgba(8, 8, 10, .18);
}

#crystal-intro.is-done {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

#crystal-intro.is-done canvas {
  transform: scale(1.035);
  filter: blur(2px);
}

#crystal-intro canvas {
  display: block;
  width: 100%;
  height: 100%;
  transform: scale(1);
  filter: blur(0);
  transition: transform 0.62s cubic-bezier(0.16, 1, 0.3, 1),
              filter 0.62s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 用于 path.getTotalLength() 的隐藏 SVG，不在视觉上显示 */
#crystal-intro__svg {
  position: absolute;
  width: 0;
  height: 0;
  visibility: hidden;
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  #crystal-intro,
  #root {
    transition-duration: 0.01ms !important;
  }
}