/**
 * 博客阅读进度指示器和文章目录样式
 */

/* 阅读进度条容器 */
.reading-progress-container {
  position: fixed;
  top: 64px; /* 放在导航栏下方 */
  left: 0;
  width: 100%;
  height: 4px;
  z-index: 1000;
  background-color: rgba(230, 230, 230, 0.8);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* 阅读进度条 */
.reading-progress-bar {
  height: 100%;
  background-color: var(--primary-color, #2196f3);
  width: 0;
  transition: width 0.1s ease;
}

/* 接近完成状态 */
.reading-progress-bar.almost-complete {
  background-color: var(--success-color, #4caf50);
}

/* 文章目录容器 */
.table-of-contents {
  margin: 1.5rem 0 2rem;
  padding: 1rem;
  background-color: rgba(240, 240, 240, 0.6);
  border-radius: 6px;
  border-left: 4px solid var(--primary-color, #2196f3);
}

/* 目录标题 */
.table-of-contents h4 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
  color: var(--text-primary, #333);
}

/* 目录列表 */
.table-of-contents ul {
  margin: 0;
  padding-left: 1.2rem;
  list-style-type: none;
}

/* 目录项 */
.table-of-contents li {
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
  line-height: 1.4;
}

/* H2 级目录项 */
.table-of-contents .toc-h2 {
  font-weight: 500;
}

/* H3 级目录项（缩进） */
.table-of-contents .toc-h3 {
  padding-left: 1rem;
  font-weight: normal;
  font-size: 0.9rem;
}

/* 目录链接 */
.table-of-contents a {
  color: var(--text-secondary, #555);
  text-decoration: none;
  transition: color 0.2s ease, transform 0.2s ease;
  display: inline-block;
}

.table-of-contents a:hover {
  color: var(--primary-color, #2196f3);
  transform: translateX(3px);
}

/* 活跃的目录项 */
.table-of-contents a.active {
  color: var(--primary-color, #2196f3);
  font-weight: 500;
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
  .reading-progress-container {
    background-color: rgba(50, 50, 50, 0.8);
  }
  
  .table-of-contents {
    background-color: rgba(40, 40, 40, 0.6);
  }
  
  .table-of-contents h4 {
    color: var(--text-primary-dark, #eee);
  }
  
  .table-of-contents a {
    color: var(--text-secondary-dark, #bbb);
  }
  
  .table-of-contents a:hover,
  .table-of-contents a.active {
    color: var(--primary-color-dark, #64b5f6);
  }
}

/* 响应式调整 */
@media screen and (max-width: 768px) {
  .table-of-contents {
    margin: 1rem 0;
    padding: 0.75rem;
  }
  
  .reading-progress-container {
    height: 3px;
  }
}