/**
 * OceanPress 文档树样式 —— 对齐思源笔记本体文档树观感
 * 依赖思源 base.css 提供的 --b3-* CSS 变量，天然适配明暗主题与自定义主题
 */

/* ---------- 侧边栏容器 ---------- */
#oceanpress-left-sidebar {
  position: sticky;
  top: 16px;
  align-self: flex-start;
  width: 280px;
  flex-shrink: 0;
  max-height: calc(100vh - 32px);
  display: flex;
  flex-direction: column;
  background-color: var(--b3-theme-background);
  border: 1px solid var(--b3-border-color);
  border-radius: var(--b3-border-radius, 6px);
  box-shadow: var(--b3-point-shadow, 0 0 0.1rem rgba(0, 0, 0, 0.15));
  overflow: hidden;
}

/* 侧边栏标题栏，思源 dock 风格 */
#oceanpress-left-sidebar .oceanpress-dock-title {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  font-size: 12px;
  color: var(--b3-theme-on-surface);
  border-bottom: 1px solid var(--b3-border-color);
  background-color: var(--b3-theme-surface);
  flex-shrink: 0;
  user-select: none;
}

#oceanpress-left-sidebar .oceanpress-dock-title svg {
  width: 14px;
  height: 14px;
  color: var(--b3-theme-on-surface);
}

/* ---------- 树容器 ---------- */
#oceanpress-doctree {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 8px 0 16px;
  scrollbar-width: thin;
  scrollbar-color: var(--b3-scroll-color) transparent;
}

#oceanpress-doctree::-webkit-scrollbar {
  width: 3px;
}

#oceanpress-doctree::-webkit-scrollbar-thumb {
  background-color: var(--b3-scroll-color);
  border-radius: 3px;
}

#oceanpress-doctree::-webkit-scrollbar-track {
  background-color: transparent;
}

/* ---------- 树节点通用 ---------- */
#oceanpress-doctree ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* 供屏幕阅读器使用，视觉上隐藏 */
#oceanpress-doctree .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* 单条目：思源文档树行高 28px、hover 浅色块 */
#oceanpress-doctree .b3-list-item {
  position: relative;
  display: flex;
  align-items: center;
  height: 28px;
  margin: 0 8px;
  padding: 0 4px 0 0;
  border-radius: var(--b3-border-radius, 4px);
  cursor: pointer;
  user-select: none;
}

#oceanpress-doctree .b3-list-item:hover {
  background-color: var(--b3-list-hover);
}

/* 当前文档：思源选中态（主题色浅底 + 主题色文字） */
#oceanpress-doctree .b3-list-item.b3-list-item--focus {
  background-color: var(--b3-theme-primary-lightest, rgba(53, 117, 240, .12));
  color: var(--b3-theme-primary, #3575f0);
}

#oceanpress-doctree .b3-list-item.b3-list-item--focus .b3-list-item__text {
  color: var(--b3-theme-primary, #3575f0);
  font-weight: 500;
}

#oceanpress-doctree .b3-list-item.b3-list-item--focus .b3-list-item__toggle,
#oceanpress-doctree .b3-list-item.b3-list-item--focus .b3-list-item__icon {
  color: var(--b3-theme-primary, #3575f0);
}

/* 展开箭头：思源右侧小三角，默认指向右、展开旋转 90° */
#oceanpress-doctree .b3-list-item__arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--b3-theme-on-surface);
  opacity: 0.65;
  transition: transform var(--b3-transition, 0.2s);
}

#oceanpress-doctree .b3-list-item__arrow svg {
  width: 100%;
  height: 100%;
}

#oceanpress-doctree .b3-list-item--open > .b3-list-item__toggle .b3-list-item__arrow {
  transform: rotate(90deg);
}

/* 占位箭头（叶子节点），保持文本对齐一致 */
#oceanpress-doctree .b3-list-item__arrow--placeholder {
  visibility: hidden;
}

/* 文件夹/文件图标：内联 svg，颜色跟随文字 */
#oceanpress-doctree .b3-list-item__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  margin: 0 4px 0 2px;
  flex-shrink: 0;
  color: inherit;
  opacity: 0.8;
}

#oceanpress-doctree .b3-list-item__icon svg {
  width: 100%;
  height: 100%;
}

/* 文档标题 */
#oceanpress-doctree .b3-list-item__text {
  flex: 1;
  min-width: 0;
  font-size: 14px;
  line-height: 28px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--b3-theme-on-background);
}

/* 整行皆可点击跳转，箭头区域阻止冒泡用于展开/折叠 */
#oceanpress-doctree .b3-list-item__toggle,
#oceanpress-doctree .b3-list-item__action {
  display: flex;
  align-items: center;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: inherit;
  font: inherit;
}

#oceanpress-doctree a.b3-list-item__link {
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 0;
  text-decoration: none;
  color: inherit;
}

/* 子层级缩进：思源文档树每级缩进 18px */
#oceanpress-doctree .b3-list-item--child {
  padding-left: 18px;
}

/* ---------- 移动端：抽屉式侧边栏 ---------- */
@media (max-width: 768px) {
  #oceanpress-left-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: min(80vw, 300px);
    height: 100dvh;
    max-height: none;
    z-index: 1001;
    border-radius: 0;
    border-right: 1px solid var(--b3-border-color);
    transform: translateX(-100%);
    transition: transform 0.25s ease;
  }

  #oceanpress-left-sidebar.oceanpress-sidebar--visible {
    transform: translateX(0);
    box-shadow: var(--b3-dialog-shadow, 0 16px 40px rgba(0, 0, 0, 0.3));
  }

  /* 抽屉打开时锁定背景滚动 */
  body.oceanpress-drawer-open {
    overflow: hidden;
  }

  /* 悬浮目录按钮 */
  #oceanpress-sidebar-fab {
    position: fixed;
    left: 16px;
    bottom: 24px;
    z-index: 1002;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 1px solid var(--b3-border-color);
    border-radius: 50%;
    background-color: var(--b3-theme-surface);
    color: var(--b3-theme-on-surface);
    box-shadow: var(--b3-point-shadow, 0 0 0.1rem rgba(0, 0, 0, 0.15));
    cursor: pointer;
  }

  #oceanpress-sidebar-fab svg {
    width: 20px;
    height: 20px;
  }
}

/* 桌面端隐藏悬浮按钮 */
@media (min-width: 769px) {
  #oceanpress-sidebar-fab {
    display: none;
  }
}