/* ============================================
   Layout Styles - 布局系统（大改版 v2）
   64px 顶栏 + 渐变分割线 + 下划线式 Tab
   256px 炭黑侧栏 + 菜单项更宽松 + 激活态发光
   ============================================ */

/* ===== 应用根容器 ===== */
.app-container {
  display: flex;
  min-height: 100vh;
  position: relative;
  background: var(--bg-body);
}

/* ===== 顶部导航栏 (Header) - TailAdmin 风格 ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(200%) blur(20px);
  -webkit-backdrop-filter: saturate(200%) blur(20px);
  border-bottom: 1px solid var(--border-color-light);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 0 20px;
  z-index: 100;
}

/* Header 左侧：折叠按钮 + Logo */
.header-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.sidebar-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  background: transparent;
  border: none;
}
.sidebar-toggle:hover {
  background: var(--bg-input);
  color: var(--color-primary);
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.header-logo .logo-icon {
  width: 32px;
  height: 32px;
  background: var(--color-primary-gradient);
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 15px;
  font-weight: 800;
  box-shadow:
    var(--shadow-primary),
    inset 0 1px 0 rgba(255, 255, 255, 0.25);
}
.header-logo .logo-text { line-height: 1; }
.header-logo:hover { color: var(--text-primary); }

/* ===== Header 中间：搜索框 ===== */
.header-center {
  display: flex;
  justify-content: center;
  max-width: 480px;
  margin: 0 auto;
}
.search-box {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}
.search-box input {
  width: 100%;
  height: 40px;
  padding: 0 60px 0 40px;
  background: var(--bg-input);
  border: 1.5px solid transparent;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
  color: var(--text-primary);
}
.search-box input::placeholder { color: var(--text-tertiary); }
.search-box input:focus {
  border-color: var(--color-primary);
  background: var(--bg-white);
  box-shadow: 0 0 0 4px rgba(var(--color-primary-rgb), 0.10);
}
.search-box .search-icon {
  position: absolute;
  left: 14px;
  color: var(--text-tertiary);
  pointer-events: none;
  font-size: 15px;
}
.search-kbd {
  position: absolute;
  right: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-tertiary);
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: 5px;
  padding: 2px 7px;
  pointer-events: none;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}

/* ===== Header 右侧：Tab + 操作 + 用户菜单 ===== */
.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* 快捷 Tab（图标式紧凑组） */
.header-tabs {
  display: flex;
  gap: 2px;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  padding: 3px;
}
.header-tab {
  width: 34px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
}
.header-tab:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.6);
}
.header-tab.active {
  color: var(--color-primary);
  background: var(--bg-white);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
}

/* 竖直分隔线 */
.header-divider {
  width: 1px;
  height: 24px;
  background: var(--border-color);
  margin: 0 2px;
  flex-shrink: 0;
}

/* 图标按钮 */
.header-icon-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  background: transparent;
  border: none;
  position: relative;
}
.header-icon-btn:hover {
  background: var(--bg-input);
  color: var(--color-primary);
}
/* 通知红点 */
.badge-dot {
  position: absolute;
  top: 8px;
  right: 9px;
  width: 7px;
  height: 7px;
  background: var(--color-accent-red);
  border-radius: 50%;
  border: 1.5px solid var(--bg-white);
}

/* 主按钮（升级会员） */
.header-btn {
  padding: 0 14px;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border-color);
  background: var(--bg-white);
  color: var(--text-secondary);
  white-space: nowrap;
  height: 40px;
}
.header-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(var(--color-primary-rgb), 0.04);
}
.header-btn.primary {
  background: var(--color-primary-gradient);
  color: white;
  border: none;
  box-shadow: var(--shadow-primary);
}
.header-btn.primary:hover {
  opacity: 0.94;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(var(--color-primary-rgb), 0.40);
}

/* 用户菜单 */
.user-menu {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 10px 4px 4px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}
.user-menu:hover {
  background: var(--bg-input);
  border-color: var(--border-color-light);
}
.user-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--color-primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}
.user-info {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.user-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}
.user-role {
  font-size: 11px;
  color: var(--text-tertiary);
  margin-top: 1px;
}
.user-chevron {
  color: var(--text-tertiary);
  transition: transform var(--transition-fast);
}
.user-menu:hover .user-chevron { transform: rotate(180deg); }

/* ===== 左侧菜单栏 (Sidebar) - TailAdmin 白色风格 ===== */
.sidebar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color-light);
  overflow-y: auto;
  overflow-x: hidden;
  transition: width var(--transition-sidebar), transform var(--transition-sidebar);
  z-index: 90;
  display: flex;
  flex-direction: column;
  padding: 0;
}

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

/* 自定义滚动条 */
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: var(--radius-full); }
.sidebar::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }

/* 侧栏顶部 Logo 区 */
.sidebar-header {
  padding: 22px 22px 18px;
  border-bottom: 1px solid var(--border-color-lighter);
  flex-shrink: 0;
}
.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 11px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.sidebar-logo .logo-icon {
  width: 34px;
  height: 34px;
  background: var(--color-primary-gradient);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
  font-weight: 800;
  box-shadow: var(--shadow-primary), inset 0 1px 0 rgba(255, 255, 255, 0.25);
  flex-shrink: 0;
}
.sidebar.collapsed .sidebar-logo .logo-text { display: none; }
.sidebar.collapsed .sidebar-header { padding: 22px 0 18px; display: flex; justify-content: center; }

/* 侧栏导航容器 */
.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 14px 14px 8px;
}

/* 菜单项基础样式 - TailAdmin menu-item 风格 */
.nav-item {
  display: flex;
  align-items: center;
  padding: 9px 12px;
  color: var(--text-sidebar);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  user-select: none;
  text-decoration: none;
  border: none;
  background: none;
  text-align: left;
  margin: 1px 0;
  border-radius: var(--radius-md);
  width: 100%;
  letter-spacing: 0.1px;
}
.nav-item:hover {
  background: var(--bg-sidebar-hover);
  color: var(--text-primary);
}
.nav-item.active {
  background: var(--bg-sidebar-active);
  color: var(--text-sidebar-active);
  font-weight: 600;
}

/* 图标容器 */
.nav-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 12px;
  font-size: 17px;
  transition: all var(--transition-fast);
  color: var(--text-tertiary);
}
.nav-item:hover .nav-icon { color: var(--text-primary); }
.nav-item.active .nav-icon { color: var(--color-primary); }
.nav-label {
  white-space: nowrap;
  opacity: 1;
  transition: opacity var(--transition-sidebar);
}
.sidebar.collapsed .nav-icon { margin-right: 0; }
.sidebar.collapsed .nav-label { opacity: 0; width: 0; overflow: hidden; }
.sidebar.collapsed .nav-item {
  justify-content: center;
  padding: 10px 0;
}

/* 折叠提示 tooltip */
.sidebar.collapsed .nav-item[title]:hover::after {
  content: attr(title);
  position: absolute;
  left: calc(var(--sidebar-collapsed-width) + 8px);
  top: 50%;
  transform: translateY(-50%);
  background: var(--text-primary);
  color: white;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
  z-index: 200;
  pointer-events: none;
  animation: fadeIn 0.15s ease;
  box-shadow: var(--shadow-md);
}

/* 父级菜单项（可展开） */
.nav-parent {
  display: flex;
  flex-direction: column;
}
.nav-parent > .nav-item {
  justify-content: space-between;
}
.nav-arrow {
  font-size: 9px;
  transition: transform var(--transition-base);
  opacity: 0.4;
  margin-left: 8px;
  color: var(--text-tertiary);
}
.nav-parent.expanded > .nav-item .nav-arrow {
  transform: rotate(90deg);
  opacity: 0.9;
  color: var(--color-primary);
}
.nav-parent.expanded > .nav-item {
  background: var(--bg-secondary);
}

/* 子菜单 - TailAdmin menu-dropdown 风格 */
.nav-submenu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s var(--ease-spring);
  margin-left: 24px;
}
.nav-parent.expanded .nav-submenu {
  max-height: 400px;
}
.nav-submenu .nav-item {
  font-size: 13px;
  padding: 7px 12px;
  color: var(--text-secondary);
  position: relative;
}
.nav-submenu .nav-item::before {
  content: '';
  position: absolute;
  left: -10px;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--border-color);
  transition: all var(--transition-fast);
}
.nav-submenu .nav-item:hover {
  background: var(--bg-sidebar-hover);
  color: var(--text-primary);
}
.nav-submenu .nav-item:hover::before { background: var(--color-primary); }
.nav-submenu .nav-item.active {
  color: var(--color-primary);
  background: var(--bg-sidebar-active);
  font-weight: 600;
}
.nav-submenu .nav-item.active::before { background: var(--color-primary); }
.sidebar.collapsed .nav-submenu { display: none; }

/* 菜单分组标题（带 data-label） - TailAdmin menu-group-title 风格 */
.nav-divider {
  height: auto;
  background: transparent;
  margin: 16px 4px 8px;
  padding: 0 8px;
  position: relative;
}
.nav-divider[data-label]::before {
  content: attr(data-label);
  display: block;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-tertiary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 0;
}
.nav-divider:not([data-label]) {
  height: 1px;
  background: var(--border-color-lighter);
  margin: 12px 22px;
  padding: 0;
}
.sidebar.collapsed .nav-divider[data-label]::before { display: none; }
.sidebar.collapsed .nav-divider[data-label] {
  height: 1px;
  background: var(--border-color-lighter);
  margin: 10px 14px;
  padding: 0;
}

/* 菜单底部区域 */
.sidebar-footer {
  margin-top: auto;
  padding: 10px 14px 14px;
  border-top: 1px solid var(--border-color-lighter);
  flex-shrink: 0;
}
.sidebar-footer .nav-item {
  color: var(--text-tertiary);
  font-size: 12px;
}
.sidebar-footer .nav-item:hover {
  color: var(--text-primary);
}

/* ===== 主内容区域 (Main Content) ===== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
  padding: 32px 36px 48px;
  transition: margin-left var(--transition-sidebar);
  position: relative;
}
.sidebar ~ .main-content.collapsed-layout {
  margin-left: var(--sidebar-collapsed-width);
}

/* 页面容器 */
.page-container {
  max-width: 1440px;
  margin: 0 auto;
  animation: pageEnter 0.4s var(--ease-spring);
}

@keyframes pageEnter {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ===== 响应式布局 ===== */

/* Tablet: 侧栏折叠 */
@media (max-width: 1023px) {
  .sidebar {
    transform: translateX(-100%);
    width: var(--sidebar-width);
    box-shadow: none;
  }
  .sidebar.mobile-open {
    transform: translateX(0);
    box-shadow: 8px 0 32px rgba(0, 0, 0, 0.3);
  }
  .main-content {
    margin-left: 0 !important;
    padding: 24px 20px 40px;
  }
  .mobile-overlay {
    display: block !important;
  }
}

/* Mobile: 单列布局 */
@media (max-width: 767px) {
  .header {
    grid-template-columns: auto auto;
    gap: 12px;
    padding: 0 14px;
  }
  .header-center { display: none; }
  .header-tabs { display: none; }
  .user-info { display: none; }
  .user-chevron { display: none; }
  .user-menu { padding: 2px; }
  .header-btn span { display: none; }
  .header-btn { padding: 0 10px; }
  .header-divider { display: none; }
  .main-content { padding: 20px 14px 32px; }
}

/* 中等屏幕：隐藏部分 header 元素 */
@media (max-width: 1023px) {
  .header-center { max-width: 320px; }
  .search-kbd { display: none; }
}
@media (max-width: 880px) {
  .header-tabs { display: none; }
}

/* 移动端遮罩层 */
.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  top: var(--header-height);
  background: var(--bg-overlay);
  z-index: 85;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}