/* ================================
   布局样式 - App Layout
   ================================ */

.app-container {
  display: flex;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

/* ================================
   侧边栏
   ================================ */

.sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  background: linear-gradient(180deg, #132f53 0%, #0f2746 100%);
  border-right: 1px solid rgba(255,255,255,0.08);
  display: flex;
  flex-direction: column;
  transition: width var(--transition-normal);
  overflow: hidden;
  flex-shrink: 0;
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
}

.sidebar-header {
  height: var(--topbar-height);
  padding: 0 calc(16px * var(--density-scale));
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  overflow: hidden;
}

.logo svg {
  flex-shrink: 0;
}

.logo-text {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: #f8fafc;
  white-space: nowrap;
  transition: opacity var(--transition-fast);
}

.sidebar.collapsed .logo-text {
  opacity: 0;
  width: 0;
}

.sidebar-toggle {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  border-radius: var(--radius-tag);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.sidebar-toggle:hover {
  background-color: var(--hover-bg);
  color: var(--text-primary);
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: calc(12px * var(--density-scale)) calc(8px * var(--density-scale));
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: calc(4px * var(--density-scale));
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: calc(10px * var(--density-scale)) calc(12px * var(--density-scale));
  color: rgba(241,245,249,0.82);
  border-radius: var(--radius-control);
  transition: all var(--transition-fast);
  overflow: hidden;
}

.nav-link:hover {
  background-color: rgba(255,255,255,0.08);
  color: #fff;
}

.nav-link.active {
  background: linear-gradient(90deg, rgba(201,162,39,0.24), rgba(201,162,39,0.1));
  color: #fff;
  border-left: 3px solid var(--accent-color);
}

[data-theme="dark"] .nav-link.active {
  background: linear-gradient(90deg, rgba(201,162,39,0.24), rgba(201,162,39,0.1));
}

.nav-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-icon svg {
  width: 100%;
  height: 100%;
}

.nav-text {
  flex: 1;
  white-space: nowrap;
  transition: opacity var(--transition-fast);
}

.sidebar.collapsed .nav-text {
  opacity: 0;
  width: 0;
}

.nav-badge {
  padding: 2px 8px;
  font-size: var(--font-size-xs);
  background-color: var(--primary-color);
  color: white;
  border-radius: var(--border-radius-full);
  flex-shrink: 0;
}

.sidebar.collapsed .nav-badge {
  display: none;
}

/* 子菜单 */
.nav-submenu {
  display: none;
  padding-left: 44px;
}

.nav-item.open > .nav-submenu {
  display: block;
}

.nav-item.open > .nav-link > .nav-arrow {
  transform: rotate(90deg);
}

.nav-arrow {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.sidebar.collapsed .nav-arrow {
  display: none;
}

/* ================================
   主内容区
   ================================ */

.main-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

/* ================================
   顶部导航
   ================================ */

.topbar {
  height: var(--topbar-height);
  background-color: var(--topbar-bg);
  border-bottom: 1px solid #d6dde8;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 calc(24px * var(--density-scale));
  flex-shrink: 0;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb-item::before {
  content: '/';
  color: var(--text-tertiary);
}

.breadcrumb-item:first-child::before {
  display: none;
}

.breadcrumb-item:last-child {
  color: var(--text-primary);
  font-weight: 500;
}

/* 顶部按钮 */
.topbar-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  border-radius: var(--radius-control);
  transition: all var(--transition-fast);
}

.topbar-btn:hover {
  background-color: var(--hover-bg);
  color: var(--text-primary);
}

/* 用户下拉 */
.user-dropdown {
  position: relative;
}

.user-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 8px 4px 4px;
  border-radius: var(--radius-control);
  transition: all var(--transition-fast);
}

.user-btn:hover {
  background-color: var(--hover-bg);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--border-radius-full);
  background: linear-gradient(135deg, var(--primary-color), var(--primary-color-hover));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.user-name {
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

/* 下拉菜单 */
.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  min-width: 180px;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-control);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
}

.dropdown-menu.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: block;
  padding: 10px 16px;
  color: var(--text-primary);
  transition: background-color var(--transition-fast);
}

.dropdown-item:hover {
  background-color: var(--hover-bg);
}

.dropdown-divider {
  height: 1px;
  background-color: var(--border-color);
  margin: 4px 0;
}

/* ================================
   主内容区域
   ================================ */

.main-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  background-color: var(--bg-color);
}

.page-container {
  padding: calc(24px * var(--density-scale));
  min-height: 100%;
}

:root[data-density="ultra"] .page-container {
  padding: 8px;
}

:root[data-density="ultra"] .topbar {
  padding: 0 10px;
}

:root[data-density="ultra"] .breadcrumb {
  font-size: 12px;
  gap: 4px;
}

:root[data-density="ultra"] .sidebar-header {
  padding: 0 8px;
}

/* ================================
   响应式布局
   ================================ */

:root[data-density="ultra"] .topbar-btn {
  width: 30px;
  height: 30px;
}

:root[data-density="ultra"] .user-avatar {
  width: 26px;
  height: 26px;
  font-size: 11px;
}

:root[data-density="ultra"] .user-name {
  font-size: 12px;
}

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    z-index: var(--z-fixed);
    transform: translateX(-100%);
    width: min(86vw, 320px);
    transition: transform var(--transition-normal);
    box-shadow: 0 0 0 rgba(0,0,0,0);
  }

  .sidebar.mobile-open {
    transform: translateX(0);
    box-shadow: 8px 0 24px rgba(0,0,0,0.28);
  }

  .sidebar.collapsed {
    width: min(86vw, 320px);
  }

  .sidebar.collapsed .logo-text,
  .sidebar.collapsed .nav-text,
  .sidebar.collapsed .nav-arrow,
  .sidebar.collapsed .nav-badge {
    opacity: 1;
    width: auto;
  }

  .sidebar.collapsed .nav-badge {
    display: block;
  }

  .topbar {
    padding: 0 12px;
  }

  .mobile-menu-btn {
    display: inline-flex;
  }

  .user-name {
    display: none;
  }

  .page-container {
    padding: 12px;
  }

  .search-bar {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .search-bar .filter-select,
  .search-bar .btn,
  .search-bar .search-input-wrapper {
    width: 100%;
  }

  .table-container {
    overflow-x: auto;
  }
}

.mobile-menu-btn {
  display: none;
}

.mobile-sidebar-mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.48);
  z-index: calc(var(--z-fixed) - 1);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.mobile-sidebar-mask.show {
  opacity: 1;
  pointer-events: auto;
}

/* 全屏模式 */
.fullscreen .sidebar,
.fullscreen .topbar {
  display: none;
}

.fullscreen .main-wrapper {
  height: 100vh;
}