/**
 * 全站页面加载动画（21st.dev Animated Spinner 风格）
 * @author Telegram @okgeceo
 */

html.ok-is-loading body {
  overflow: hidden;
}

.ok-page-loader {
  --ok-loader-silk: cubic-bezier(0.22, 1, 0.36, 1);

  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in oklch, var(--background) 90%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 1;
  visibility: visible;
  transition:
    opacity 600ms var(--ok-loader-silk),
    backdrop-filter 600ms var(--ok-loader-silk),
    -webkit-backdrop-filter 600ms var(--ok-loader-silk),
    visibility 600ms var(--ok-loader-silk);
}

.ok-page-loader.is-exiting {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
}

.ok-page-loader__stage {
  position: relative;
  width: 5.5rem;
  height: 5.5rem;
  display: grid;
  place-items: center;
  animation: ok-loader-enter 600ms var(--ok-loader-silk) both;
}

.ok-page-loader__spinner {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  color: var(--foreground);
  transform-origin: center;
  animation: ok-loader-spin 0.95s linear infinite;
}

.ok-page-loader__track,
.ok-page-loader__arc {
  fill: none;
  stroke: currentColor;
  stroke-width: 2.5;
  stroke-linecap: round;
}

.ok-page-loader__track {
  opacity: 0.16;
}

.ok-page-loader__logo {
  position: relative;
  z-index: 1;
  width: 3.125rem;
  height: 3.125rem;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.ok-page-loader.is-exiting .ok-page-loader__stage {
  animation: none;
  transform: scale(0.96);
  opacity: 0;
  transition:
    transform 600ms var(--ok-loader-silk),
    opacity 480ms var(--ok-loader-silk);
}

.ok-page-loader.is-exiting .ok-page-loader__spinner {
  animation-play-state: paused;
}

@keyframes ok-loader-enter {
  from {
    opacity: 0;
    transform: scale(0.92);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes ok-loader-spin {
  to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .ok-page-loader__spinner,
  .ok-page-loader__stage {
    animation: none;
  }

  .ok-page-loader__spinner {
    opacity: 0.5;
  }

  .ok-page-loader.is-exiting,
  .ok-page-loader.is-exiting .ok-page-loader__stage {
    transition-duration: var(--duration-fast);
  }
}

@media (max-width: 575px) {
  .ok-page-loader__stage {
    width: 5rem;
    height: 5rem;
  }

  .ok-page-loader__logo {
    width: 3.125rem;
    height: 3.125rem;
  }
}