/* ============================================
 * YuFen 主题 - 右侧目录导航
 * 作用：文章详情页右侧固定的标题目录
 * 功能：固定定位、滚动高亮、仅宽屏显示
 * ============================================ */

/* ---------- 容器 ---------- */
.toc-sidebar {
  position: fixed;
  left: calc(50% + 360px);
  top: 6rem;
  width: 220px;
  max-height: calc(100vh - 8rem);
  overflow-y: auto;
  padding-left: 1rem;
  border-left: 2px solid #e8e8e8;
  display: none;
}

/* ---------- 标题 ---------- */
.toc-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: #999;
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

/* ---------- 列表重置 ---------- */
.toc-sidebar nav#TableOfContents ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc-sidebar nav#TableOfContents li {
  margin: 0;
  padding: 0;
}

/* ---------- 一级标题 ---------- */
.toc-sidebar nav#TableOfContents > ul > li > a {
  display: block;
  font-size: 0.78rem;
  color: #999;
  text-decoration: none;
  padding: 3px 0;
  line-height: 1.5;
  transition: color 0.2s ease;
  border-left: none;
}

/* ---------- 二级标题缩进 ---------- */
.toc-sidebar nav#TableOfContents > ul > li > ul {
  padding-left: 0.75rem;
}

.toc-sidebar nav#TableOfContents > ul > li > ul > li > a {
  display: block;
  font-size: 0.72rem;
  color: #bbb;
  text-decoration: none;
  padding: 2px 0;
  line-height: 1.5;
  transition: color 0.2s ease;
}

/* ---------- 悬停 ---------- */
.toc-sidebar a:hover {
  color: #333 !important;
}

/* ---------- 当前激活高亮 ---------- */
.toc-sidebar a.active {
  color: #dd2c38 !important;
  font-weight: 600;
}

/* ---------- 深色模式 ---------- */
.dark .toc-sidebar {
  border-left-color: #333;
}

.dark .toc-title {
  color: #666;
}

.dark .toc-sidebar a {
  color: #666;
}

.dark .toc-sidebar a:hover {
  color: #d0d0d0 !important;
}

.dark .toc-sidebar a.active {
  color: #f87171 !important;
}

/* ---------- 滚动条 ---------- */
.toc-sidebar::-webkit-scrollbar {
  width: 3px;
}

.toc-sidebar::-webkit-scrollbar-thumb {
  background: #ddd;
  border-radius: 2px;
}

.dark .toc-sidebar::-webkit-scrollbar-thumb {
  background: #333;
}

/* ---------- 仅宽屏显示 ---------- */
@media (min-width: 1400px) {
  .toc-sidebar {
    display: block;
  }
}