/**
 * 🚀 Swup 无刷新页面切换动画样式
 * 淡入淡出 + 位移动画
 * 保留 Banner 区域与导航栏，仅替换 #swup-container 主内容区
 */

/* 切换过程中禁用平滑滚动，避免先滚动后过渡的分段感 */
html.is-animating,
html.is-animating body,
html.is-animating * {
  scroll-behavior: auto !important;
}

/* 🔝 Swup 顶部进度条
 * 插件通过 transform: scaleX(var(--progress, 0)) 控制宽度，
 * 这里只覆盖颜色、高度和层级，不干预 transform 动画。
 */
html body > .swup-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 2147483647;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
  box-shadow: 0 0 12px rgba(102, 126, 234, 0.8);
}

/* 🎭 主内容容器 */
#swup-container.transition-main {
  will-change: opacity, transform;
}

/* 切换期间保持 will-change */
html.is-changing #swup-container.transition-main {
  will-change: opacity, transform;
}

/* 新内容进入：先隐藏并立即播放进入动画
 * 使用 html.is-rendering 而非 html.is-animating.is-rendering，
 * 确保 animation 在 is-animating 被移除后仍能完整播放到 visit:end
 */
html.is-rendering #swup-container.transition-main {
  opacity: 0;
  animation: swup-container-enter 120ms cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

@keyframes swup-container-enter {
  from {
    opacity: 0;
    transform: translateY(2rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 旧内容离开：主容器向上淡出 */
html.is-animating.is-leaving #swup-container.transition-main {
  opacity: 0;
  transform: translateY(-2rem);
  transition:
    transform 120ms cubic-bezier(0.55, 0.055, 0.675, 0.19),
    opacity 120ms cubic-bezier(0.55, 0.055, 0.675, 0.19);
}

/* 🎯 页面切换中禁用容器交互 */
html.is-page-transitioning #swup-container.transition-main {
  pointer-events: none;
}

/* 🗂️ 右侧边栏独立过渡：右移渐隐 / 左移渐显（仅主内容区侧栏列，不含弹窗） */
#swup-container .blog-sidebar {
  transition:
    opacity 120ms cubic-bezier(0.25, 0.46, 0.45, 0.94),
    transform 120ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: opacity, transform;
}

/* 旧内容离开：右侧边栏右移渐隐 */
html.is-animating.is-leaving #swup-container .blog-sidebar {
  opacity: 0;
  transform: translateX(2rem);
}

/* 新内容进入：右侧边栏从右向左移渐显 */
html.is-animating.is-rendering #swup-container .blog-sidebar {
  opacity: 0;
  transform: translateX(2rem);
}

/* ✨ 进入动画（页面初次加载/切换完成后） */
.swup-fade-in-up {
  animation: swup-fade-in-up 0.6s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

@keyframes swup-fade-in-up {
  0% {
    opacity: 0;
    transform: translateY(2rem);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ♿ 减少动画偏好适配 */
@media (prefers-reduced-motion: reduce) {
  html.is-rendering #swup-container.transition-main,
  html.is-animating.is-leaving #swup-container.transition-main,
  html.is-animating.is-leaving #swup-container .blog-sidebar,
  html.is-animating.is-rendering #swup-container .blog-sidebar,
  #swup-container.transition-main,
  #swup-container .blog-sidebar,
  .swup-progress-bar,
  .swup-fade-in-up {
    transition: none !important;
    animation: none !important;
  }
}