/*
 * 实验室知识库 - 自定义样式
 * 顶栏（搜索+调色板+侧栏开关）+ 可隐藏左侧边栏 + 自定义导航
 */

/* ========== 基础变量 ========== */
:root {
  --lab-primary: #3f51b5;
  --lab-primary-light: #5c6bc0;
  --lab-header-height: 2.75rem;
}

/* ========== 全宽布局 ========== */
.md-grid {
  max-width: 100%;
}

.md-main__inner {
  margin-top: 0.2rem;
  padding: 0 0.6rem;
}

/* ========== 顶栏 ========== */
.md-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--lab-header-height);
  z-index: 4;
  background: var(--md-default-bg-color);
  border-bottom: 1px solid var(--md-default-fg-color--lightest);
  box-shadow: 0 0 0.2rem rgba(0, 0, 0, 0.1);
}

/* 顶栏内部 - 三栏Grid布局实现搜索框真正居中 */
.md-header__inner {
  display: grid;
  grid-template-columns: 1fr minmax(0, 36rem) 1fr;
  align-items: center;
  height: var(--lab-header-height);
  padding: 0 1rem;
  gap: 0.75rem;
}

/* 侧栏开关按钮 */
.lab-header__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--md-default-fg-color--light);
  border-radius: 4px;
  flex-shrink: 0;
  transition: color 0.2s, background 0.2s;
}

/* 左侧容器 */
.lab-header__left {
  display: flex;
  align-items: center;
}

.lab-header__toggle:hover {
  color: var(--lab-primary);
  background: rgba(63, 81, 181, 0.06);
}

.lab-header__toggle svg {
  fill: currentColor;
}

/* 搜索组件 - 覆盖Material默认的响应式隐藏，始终显示搜索栏 */
.md-search {
  max-width: 36rem;
  width: 100%;
}

/* 强制搜索内部容器可见（Material默认在移动端隐藏） */
.md-search__inner {
  width: 100% !important;
  height: auto !important;
  opacity: 1 !important;
  overflow: visible !important;
  position: relative !important;
  transform: none !important;
  float: none !important;
  z-index: 2;
}

.md-search__form {
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 4px;
  background: var(--md-default-bg-color) !important;
  height: 2rem;
  box-shadow: none !important;
}

.md-search__form:hover {
  border-color: var(--lab-primary);
}

.md-search__input {
  font-size: 0.8rem;
  height: 2rem;
  padding-top: 0;
  padding-bottom: 0;
}

.md-search__input::placeholder {
  color: var(--md-default-fg-color--light);
}

/* 搜索图标（放大镜）样式 */
.md-search__icon[for="__search"] {
  color: var(--md-default-fg-color--light);
}

/* 搜索结果展开覆盖：搜索激活后正确显示结果面板 */
.md-search__output {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 10;
}

/* 搜索overlay：激活时覆盖页面背景 */
.md-search__overlay {
  display: none;
}
[data-md-toggle="search"]:checked ~ .md-header .md-search__overlay {
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.54);
  z-index: 1;
  cursor: pointer;
}

/* 右侧工具区（下载+调色板） */
.lab-header__actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.25rem;
}

/* 通用顶栏按钮样式（下载等） */
.lab-header__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--md-default-fg-color--light);
  border-radius: 4px;
  text-decoration: none;
  transition: color 0.2s, background 0.2s;
}

.lab-header__btn:hover {
  color: var(--lab-primary);
  background: rgba(63, 81, 181, 0.06);
}

.lab-header__btn svg {
  fill: currentColor;
}

/* 调色板区域（靠右） */
.lab-header__palette {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.lab-header__palette form {
  display: flex;
  align-items: center;
}

/* 调色板切换按钮 - CSS兜底：确保已选中的输入后的标签可见 */
.md-header__option .md-option:checked + label[hidden] {
  display: flex !important;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  cursor: pointer;
  color: var(--md-default-fg-color--light);
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
}

/* 明亮模式：确保调色板图标为深色（覆盖 Material 默认白色） */
.lab-header__palette .md-header__button {
  color: var(--md-default-fg-color--light) !important;
}

.md-header__option .md-option:checked + label:hover,
.lab-header__palette .md-header__button:hover {
  color: var(--lab-primary) !important;
  background: rgba(63, 81, 181, 0.06);
}

/* ========== 容器偏移（为顶栏留出空间） ========== */
.md-container {
  padding-top: var(--lab-header-height) !important;
}

/* ========== 左侧边栏 ========== */
.md-sidebar--primary {
  position: sticky;
  top: var(--lab-header-height);
  height: calc(100vh - var(--lab-header-height));
  border-right: 1px solid var(--md-default-fg-color--lightest);
  transition: transform 0.3s ease, opacity 0.25s ease;
}

.md-sidebar--primary .md-sidebar__scrollwrap {
  height: 100%;
  overflow: hidden;
}

.md-sidebar--primary .md-sidebar__inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding-top: 0;
}

/* 右侧目录栏偏移 */
.md-sidebar--secondary {
  top: var(--lab-header-height);
  height: calc(100vh - var(--lab-header-height));
}

/* 隐藏默认导航 */
.md-nav--primary,
.md-nav__title {
  display: none !important;
}

/* ========== 侧栏收缩/展开 ========== */
@media screen and (min-width: 76.25em) {
  html.sidebar-hidden .md-sidebar--primary {
    transform: translateX(-100%);
    opacity: 0;
    pointer-events: none;
    position: fixed;
    left: 0;
    width: 12.1rem;
  }

  html.sidebar-hidden .md-content {
    margin-left: 0;
  }
}

/* ========== 知识库标题 ========== */
.lab-title {
  padding: 0.15rem 1.2rem 0.85rem;
  border-bottom: 1px solid var(--md-default-fg-color--lightest);
  background: var(--md-default-bg-color);
}

.lab-title__link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--lab-primary);
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 600;
}

.lab-title__link:hover {
  color: var(--lab-primary-light);
}

.lab-title svg,
.lab-title__link svg {
  width: 1.6rem;
  height: 1.6rem;
  fill: currentColor;
  flex-shrink: 0;
}

/* ========== 自定义导航（可折叠） ========== */
.lab-nav {
  --lab-nav-indent: 0.9rem;
  --lab-nav-toggle-space: 0.95rem;
  --lab-nav-link-x: 0.2rem;
  padding: 0.5rem 0;
  flex: 1;
  overflow-y: auto;
  min-height: 0;
}

.lab-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.lab-nav__list--nested {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding-left: 0;
}

.lab-nav__list--expanded {
  max-height: 2000px;
}

.lab-nav__item {
  position: relative;
}

/* 章节标题（可折叠） */
.lab-nav__section-title {
  display: flex;
  align-items: center;
  position: relative;
}

.lab-nav__item[data-level="1"] > .lab-nav__section-title,
.lab-nav__item[data-level="1"] > .lab-nav__link {
  margin-left: var(--lab-nav-indent);
}

.lab-nav__item[data-level="2"] > .lab-nav__section-title,
.lab-nav__item[data-level="2"] > .lab-nav__link {
  margin-left: calc(var(--lab-nav-indent) * 2);
}

.lab-nav__item[data-level="3"] > .lab-nav__section-title,
.lab-nav__item[data-level="3"] > .lab-nav__link {
  margin-left: calc(var(--lab-nav-indent) * 3);
}

.lab-nav__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--lab-nav-toggle-space);
  height: 1.4rem;
  padding: 0;
  margin: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
}

/* === 箭头图标 - 层级差异化 === */
.lab-nav__icon {
  fill: var(--md-default-fg-color--light);
  transition: transform 0.2s, opacity 0.2s;
  width: 14px;
  height: 14px;
}

/* 二级箭头：更小、更淡 */
.lab-nav__list--nested .lab-nav__icon {
  width: 12px;
  height: 12px;
  opacity: 0.7;
}

/* 三级箭头：最小、最淡 */
.lab-nav__list--nested .lab-nav__list--nested .lab-nav__icon {
  width: 11px;
  height: 11px;
  opacity: 0.5;
}

.lab-nav__item--expanded > .lab-nav__section-title .lab-nav__icon,
.lab-nav__section-title[aria-expanded="true"] .lab-nav__icon {
  transform: rotate(90deg);
}

/* === 导航链接 - 统一基础样式 === */
.lab-nav__link {
  display: block;
  padding: 0.4rem 0.2rem;
  text-decoration: none;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  flex: 1;
  font-size: 0.85rem;
  font-weight: 500;
  color: rgba(0, 0, 0, 0.78);
  border-left: 3px solid transparent;
}

.lab-nav__item:not(.lab-nav__item--section) > .lab-nav__link {
  padding-left: calc(var(--lab-nav-toggle-space) + var(--lab-nav-link-x));
}

.lab-nav__link:hover {
  background: rgba(63, 81, 181, 0.06);
  color: var(--lab-primary);
}

/* 一级 - 激活状态 */
.lab-nav__item--active > .lab-nav__link,
.lab-nav__item--active > .lab-nav__section-title .lab-nav__link {
  color: var(--lab-primary);
  font-weight: 600;
}

.lab-nav__link--active {
  color: var(--lab-primary);
  background: rgba(63, 81, 181, 0.08);
  font-weight: 600;
  border-left-color: var(--lab-primary);
}

/* === 二级链接样式 === */
.lab-nav__list--nested .lab-nav__link {
  font-size: 0.82rem;
  font-weight: 400;
  color: rgba(0, 0, 0, 0.65);
  border-left-width: 2px;
}

.lab-nav__list--nested .lab-nav__link:hover {
  background: rgba(63, 81, 181, 0.05);
  color: rgba(63, 81, 181, 0.85);
}

.lab-nav__list--nested .lab-nav__item--active > .lab-nav__link,
.lab-nav__list--nested .lab-nav__item--active > .lab-nav__section-title .lab-nav__link {
  color: var(--lab-primary);
  font-weight: 500;
}

.lab-nav__list--nested .lab-nav__link--active {
  color: var(--lab-primary);
  background: rgba(63, 81, 181, 0.08);
  font-weight: 500;
  border-left-color: var(--lab-primary);
}

/* === 三级链接样式 === */
.lab-nav__list--nested .lab-nav__list--nested .lab-nav__link {
  font-size: 0.78rem;
  font-weight: 400;
  color: rgba(0, 0, 0, 0.55);
  border-left-width: 2px;
}

.lab-nav__list--nested .lab-nav__list--nested .lab-nav__link:hover {
  background: rgba(63, 81, 181, 0.04);
  color: rgba(63, 81, 181, 0.75);
}

.lab-nav__list--nested .lab-nav__list--nested .lab-nav__item--active > .lab-nav__link {
  color: rgba(63, 81, 181, 0.85);
}

.lab-nav__list--nested .lab-nav__list--nested .lab-nav__link--active {
  color: rgba(63, 81, 181, 0.85);
  background: rgba(63, 81, 181, 0.08);
  border-left-color: var(--lab-primary);
}

/* === 深色模式 - 顶栏 === */
[data-md-color-scheme="slate"] .md-header {
  border-bottom-color: rgba(255, 255, 255, 0.07);
  box-shadow: 0 0 0.2rem rgba(0, 0, 0, 0.3);
}

[data-md-color-scheme="slate"] .lab-header__toggle:hover,
[data-md-color-scheme="slate"] .lab-header__btn:hover {
  background: rgba(130, 177, 255, 0.1);
}

[data-md-color-scheme="slate"] .md-search__form {
  border-color: rgba(255, 255, 255, 0.1);
  background: var(--md-default-bg-color) !important;
}

[data-md-color-scheme="slate"] .md-search__form:hover {
  border-color: rgba(130, 177, 255, 0.4);
}

[data-md-color-scheme="slate"] .md-header__option .md-option:checked + label:hover {
  background: rgba(130, 177, 255, 0.1);
}

/* === 深色模式 - 导航 === */
[data-md-color-scheme="slate"] .lab-nav__link {
  color: rgba(255, 255, 255, 0.82);
}

[data-md-color-scheme="slate"] .lab-nav__link:hover {
  background: rgba(130, 177, 255, 0.08);
  color: rgba(130, 177, 255, 0.95);
}

[data-md-color-scheme="slate"] .lab-nav__item--active > .lab-nav__link,
[data-md-color-scheme="slate"] .lab-nav__item--active > .lab-nav__section-title .lab-nav__link {
  color: #82b1ff;
}

[data-md-color-scheme="slate"] .lab-nav__link--active {
  color: #82b1ff;
  background: rgba(130, 177, 255, 0.1);
  border-left-color: #82b1ff;
}

[data-md-color-scheme="slate"] .lab-nav__list--nested .lab-nav__link {
  color: rgba(255, 255, 255, 0.65);
}

[data-md-color-scheme="slate"] .lab-nav__list--nested .lab-nav__link:hover {
  background: rgba(130, 177, 255, 0.06);
  color: rgba(130, 177, 255, 0.85);
}

[data-md-color-scheme="slate"] .lab-nav__list--nested .lab-nav__item--active > .lab-nav__link,
[data-md-color-scheme="slate"] .lab-nav__list--nested .lab-nav__item--active > .lab-nav__section-title .lab-nav__link {
  color: rgba(130, 177, 255, 0.85);
}

[data-md-color-scheme="slate"] .lab-nav__list--nested .lab-nav__link--active {
  color: rgba(130, 177, 255, 0.85);
  background: rgba(130, 177, 255, 0.1);
  border-left-color: #82b1ff;
}

[data-md-color-scheme="slate"] .lab-nav__list--nested .lab-nav__list--nested .lab-nav__link {
  color: rgba(255, 255, 255, 0.5);
}

[data-md-color-scheme="slate"] .lab-nav__list--nested .lab-nav__list--nested .lab-nav__link:hover {
  color: rgba(130, 177, 255, 0.75);
}

[data-md-color-scheme="slate"] .lab-nav__list--nested .lab-nav__list--nested .lab-nav__item--active > .lab-nav__link,
[data-md-color-scheme="slate"] .lab-nav__list--nested .lab-nav__list--nested .lab-nav__link--active {
  color: rgba(130, 177, 255, 0.75);
}

[data-md-color-scheme="slate"] .lab-nav__list--nested .lab-nav__list--nested .lab-nav__link--active {
  background: rgba(130, 177, 255, 0.1);
  border-left-color: #82b1ff;
}

/* ========== 主内容区 ========== */
.md-content {
  padding-top: 0.25rem;
}

.md-content__inner {
  padding-top: 0.15rem;
}

/* ========== Emoji支持 ========== */
.lab-nav,
.lab-nav__link,
.md-content,
.md-typeset {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji",
               "Segoe UI Symbol", "Noto Color Emoji", sans-serif !important;
}

.lab-nav__link,
.md-typeset {
  line-height: 1.6;
}

/* ========== 打印样式 ========== */
@media print {
  .md-header,
  .md-sidebar {
    display: none !important;
  }

  .md-content {
    margin-left: 0 !important;
  }

  .md-container {
    padding-top: 0 !important;
  }
}

/* ========== 响应式调整 ========== */
@media screen and (max-width: 76.1875em) {
  .lab-title {
    padding: 0.8rem 1rem;
  }

  .lab-title__text {
    font-size: 1rem;
  }

  .md-search {
    max-width: none;
  }
}