/* =========================================================================
   移动端右侧抽屉目录 - 完整样式
   ========================================================================= */

/* --- 1. 右侧悬浮按钮 --- */
#mobile-toc-fab {
  position: fixed;
  bottom: 85px;               /* 位于默认返回顶部按钮正上方 */
  right: 1rem;
  width: 42px;
  height: 42px;
  background-color: var(--board-color, #FFF0E8);
  color: var(--post-text-color, #3B3432);
  border-radius: 50%;
  text-align: center;
  line-height: 40px;          /* 垂直居中 */
  font-size: 20px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  z-index: 997;
  cursor: pointer;
  border: 1px solid var(--line-color, #F0DDD5);
  transition: background-color 0.2s ease, transform 0.2s ease, color 0.2s ease;
  user-select: none;
}

#mobile-toc-fab:active {
  background-color: var(--link-hover-bg-color, #FFE4DA);
  transform: scale(0.92);
}

/* --- 2. 半透明背景遮罩 (层级 1050，彻底盖过 Navbar) --- */
#mobile-toc-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.4);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

#mobile-toc-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* --- 3. 右侧抽屉侧边栏面板 (层级 1051) --- */
#mobile-toc-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 78vw;                 /* 占据屏幕右侧 78% 宽度 */
  max-width: 320px;
  height: 100vh;
  background-color: var(--board-color, #FFF0E8);
  z-index: 1051;
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
  border-left: 1px solid var(--line-color, #F0DDD5);

  /* 适配刘海屏与全面屏顶部安全距离 */
  padding-top: max(10px, env(safe-area-inset-top));
  box-sizing: border-box;

  /* 右侧滑出动画 */
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1),
              background-color 0.3s ease, border-color 0.3s ease;

  display: flex;
  flex-direction: column;
}

#mobile-toc-drawer.active {
  transform: translateX(0);
}

/* --- 4. 抽屉头部 --- */
.mobile-toc-drawer-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--line-color, #F0DDD5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--post-heading-color, #292321);
  font-size: 16px;
  transition: color 0.3s ease, border-color 0.3s ease;
}

#mobile-toc-close {
  font-size: 26px;
  color: var(--sec-text-color, #80736E);
  cursor: pointer;
  line-height: 1;
  padding: 0 4px;
}

/* --- 5. 抽屉列表内容区域 --- */
.mobile-toc-drawer-body {
  padding: 16px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  flex: 1;

  /* 抽屉内部滚动条 (浅色) */
  scrollbar-width: thin;
  scrollbar-color: #CBB9B2 transparent;
}

.mobile-toc-drawer-body::-webkit-scrollbar {
  width: 4px;
}

.mobile-toc-drawer-body::-webkit-scrollbar-thumb {
  background-color: #CBB9B2;
  border-radius: 2px;
}

.mobile-toc-drawer-body::-webkit-scrollbar-track {
  background: transparent;
}

.mobile-toc-drawer-body ol.toc {
  margin: 0;
  padding-left: 1rem;
  width: 100%;
  box-sizing: border-box;
}

.mobile-toc-drawer-body .toc-item {
  margin-bottom: 4px;
}

/* 目录链接文本样式 (防溢出) */
.mobile-toc-drawer-body .toc-link {
  color: var(--post-text-color, #3B3432);
  display: block;
  padding: 6px 8px;
  font-size: 14px;
  line-height: 1.5;
  white-space: normal;
  word-wrap: break-word;
  overflow-wrap: break-word;
  border-radius: 6px;
  transition: color 0.15s ease, background-color 0.15s ease;
}

/* 目录链接触摸反馈 */
.mobile-toc-drawer-body .toc-link:active {
  background-color: var(--link-hover-bg-color, #FFE4DA);
}

/* --- 6. 高亮选中状态 (同步主题链接配色) --- */
.mobile-toc-drawer-body .toc-link.active {
  color: var(--post-link-color, #E47F62) !important;
  font-weight: bold;
  background-color: var(--link-hover-bg-color, #FFE4DA);
}

/* =========================================================================
   深色模式 (data-user-color-scheme="dark")
   ========================================================================= */

/* --- 1. 悬浮按钮 --- */
[data-user-color-scheme="dark"] #mobile-toc-fab,
body[data-user-color-scheme="dark"] #mobile-toc-fab {
  background-color: #282323;              /* board_color_dark */
  color: #D8D1CE;                          /* post_text_color_dark */
  border-color: #463D3A;                  /* line_color_dark */
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
}

[data-user-color-scheme="dark"] #mobile-toc-fab:active,
body[data-user-color-scheme="dark"] #mobile-toc-fab:active {
  background-color: #3A2D2D;              /* link_hover_bg_color_dark */
}

/* --- 2. 遮罩：深色下稍微加深，保证对比度 --- */
[data-user-color-scheme="dark"] #mobile-toc-overlay,
body[data-user-color-scheme="dark"] #mobile-toc-overlay {
  background: rgba(0, 0, 0, 0.55);
}

/* --- 3. 抽屉面板 --- */
[data-user-color-scheme="dark"] #mobile-toc-drawer,
body[data-user-color-scheme="dark"] #mobile-toc-drawer {
  background-color: #282323;              /* board_color_dark */
  border-left-color: #463D3A;             /* line_color_dark */
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.45);
}

/* --- 4. 抽屉头部 --- */
[data-user-color-scheme="dark"] .mobile-toc-drawer-header,
body[data-user-color-scheme="dark"] .mobile-toc-drawer-header {
  color: #EEE7E4;                          /* post_heading_color_dark */
  border-bottom-color: #463D3A;           /* line_color_dark */
}

[data-user-color-scheme="dark"] #mobile-toc-close,
body[data-user-color-scheme="dark"] #mobile-toc-close {
  color: #AFA6A2;                          /* sec_text_color_dark */
}

/* --- 5. 列表内容与滚动条 --- */
[data-user-color-scheme="dark"] .mobile-toc-drawer-body,
body[data-user-color-scheme="dark"] .mobile-toc-drawer-body {
  scrollbar-color: #6F6460 transparent;   /* scrollbar_color_dark */
}

[data-user-color-scheme="dark"] .mobile-toc-drawer-body::-webkit-scrollbar-thumb,
body[data-user-color-scheme="dark"] .mobile-toc-drawer-body::-webkit-scrollbar-thumb {
  background-color: #6F6460;               /* scrollbar_color_dark */
}

[data-user-color-scheme="dark"] .mobile-toc-drawer-body .toc-link,
body[data-user-color-scheme="dark"] .mobile-toc-drawer-body .toc-link {
  color: #D8D1CE;                          /* post_text_color_dark */
}

[data-user-color-scheme="dark"] .mobile-toc-drawer-body .toc-link:active,
body[data-user-color-scheme="dark"] .mobile-toc-drawer-body .toc-link:active {
  background-color: #3A2D2D;              /* link_hover_bg_color_dark */
}

/* --- 6. 高亮选中状态 --- */
[data-user-color-scheme="dark"] .mobile-toc-drawer-body .toc-link.active,
body[data-user-color-scheme="dark"] .mobile-toc-drawer-body .toc-link.active {
  color: #F2B6A0 !important;              /* post_link_color_dark */
  background-color: #3A2D2D;              /* link_hover_bg_color_dark */
}

/* 深色模式头部背景 */
[data-user-color-scheme="dark"] .mobile-toc-drawer-header,
body[data-user-color-scheme="dark"] .mobile-toc-drawer-header {
  background-color: #282323;             /* board_color_dark */
}


/* =========================================================================
   强制展开子级目录 (覆盖 Fluid 主题的折叠规则)
   ========================================================================= */

/* 子级有序列表强制显示 */
.mobile-toc-drawer-body ol.toc ol,
.mobile-toc-drawer-body .toc-child,
.mobile-toc-drawer-body .toc-item ol {
  display: block !important;
  max-height: none !important;
  overflow: visible !important;
  visibility: visible !important;
}

/* 修正折叠箭头等装饰元素（如果主题有渲染） */
.mobile-toc-drawer-body .toc-item::before,
.mobile-toc-drawer-body .toc-link::after {
  display: none !important;
}

/* 子级列表缩进与层级视觉引导线 */
.mobile-toc-drawer-body ol.toc ol {
  padding-left: 12px;
  margin: 2px 0;
  border-left: 1px solid var(--line-color, #F0DDD5);
}

/* 深色模式下引导线颜色同步 */
[data-user-color-scheme="dark"] .mobile-toc-drawer-body ol.toc ol,
body[data-user-color-scheme="dark"] .mobile-toc-drawer-body ol.toc ol {
  border-left-color: #463D3A;             /* line_color_dark */
}

#mobile-toc-drawer {
  position: fixed;
  overflow: hidden;
}

/* 头部固定高度 */
.mobile-toc-drawer-header {
  height: 56px;
  flex: none;
  box-sizing: border-box;
  padding: 0 20px;           /* 改用行高垂直居中 */
  line-height: 56px;
}

/* 内容区绝对定位，占满头部以下的全部空间 */
.mobile-toc-drawer-body {
  position: absolute;
  top: 56px;
  left: 0;
  right: 0;
  bottom: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}

/* =========================================================================
   修复头部透明穿透 + 安全区错位
   ========================================================================= */

/* 1. 头部显式设置背景色，并置于内容区之上 */
.mobile-toc-drawer-header {
  position: relative;                    /* 脱离普通流叠加关系 */
  z-index: 2;                            /* 盖住绝对定位的内容区 */
  height: 56px;
  flex: none;
  box-sizing: border-box;
  padding: 0 20px;
  line-height: 56px;
  background-color: var(--board-color, #FFF0E8);   /* ★ 显式背景 */
}

/* 2. 内容区起点对齐：加上安全区高度，紧贴头部底边 */
.mobile-toc-drawer-body {
  position: absolute;
  top: calc(56px + max(10px, env(safe-area-inset-top)));  /* ★ 对齐头部底边 */
  left: 0;
  right: 0;
  bottom: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}

/* 3. 内容滚动时上方被头部截断，顺便让内容区底边也避开底部安全区 */
.mobile-toc-drawer-body .toc {
  padding-bottom: env(safe-area-inset-bottom);
}