/**
 * 大数据实训平台 - 布局组件样式
 * BigData Training Platform - Layout Component Styles
 */

/* ========================================
   顶部导航栏 - Header
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  height: var(--header-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  z-index: var(--z-sticky);
  transition: left var(--transition-normal);
}

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

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary-500), var(--chart-1));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

/* 搜索框 */
.search-box {
  position: relative;
  width: 320px;
}

.search-box input {
  width: 100%;
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4) var(--space-2) var(--space-10);
  font-size: var(--text-sm);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.search-box input:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(26, 133, 255, 0.15);
}

.search-box input::placeholder {
  color: var(--text-tertiary);
}

.search-box .search-icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  pointer-events: none;
}

/* 头部图标按钮 */
.header-icon-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  position: relative;
}

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

.header-icon-btn .badge-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  background: var(--error-500);
  border-radius: 50%;
  border: 2px solid var(--bg-secondary);
}

/* 用户菜单 */
.user-menu {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.user-menu:hover {
  background: var(--bg-tertiary);
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-500), var(--chart-2));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
}

.user-info {
  display: flex;
  flex-direction: column;
}

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

.user-role {
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

/* ========================================
   侧边导航栏 - Sidebar
   ======================================== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-primary);
  display: flex;
  flex-direction: column;
  z-index: var(--z-fixed);
  transition: width var(--transition-normal);
}

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

/* 侧边栏头部 */
.sidebar-header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 var(--space-4);
  border-bottom: 1px solid var(--border-primary);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
}

.sidebar.collapsed .sidebar-logo-text {
  display: none;
}

/* 导航菜单 */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4) 0;
}

.nav-section {
  margin-bottom: var(--space-2);
}

.nav-section-title {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-3) var(--space-4);
  white-space: nowrap;
}

.sidebar.collapsed .nav-section-title {
  display: none;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  margin: 0 var(--space-2);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  white-space: nowrap;
}

.nav-item:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.nav-item.active {
  background: rgba(26, 133, 255, 0.15);
  color: var(--primary-500);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--primary-500);
  border-radius: 0 var(--radius-full) var(--radius-full) 0;
}

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

.nav-text {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

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

/* 子菜单 */
.nav-submenu {
  margin-left: var(--space-4);
  border-left: 1px solid var(--border-primary);
}

.nav-submenu .nav-item {
  padding-left: var(--space-6);
  margin-left: 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.nav-submenu .nav-item.active::before {
  display: none;
}

/* 折叠按钮 */
.sidebar-toggle {
  position: absolute;
  right: -12px;
  top: 80px;
  width: 24px;
  height: 24px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  z-index: 10;
}

.sidebar-toggle:hover {
  background: var(--primary-500);
  border-color: var(--primary-500);
  color: white;
}

.sidebar.collapsed .sidebar-toggle {
  transform: rotate(180deg);
}

/* 侧边栏底部 */
.sidebar-footer {
  padding: var(--space-4);
  border-top: 1px solid var(--border-primary);
}

.theme-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

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

.sidebar.collapsed .theme-toggle-text {
  display: none;
}

/* ========================================
   移动端菜单按钮
   ======================================== */
.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
}

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

/* ========================================
   响应式适配
   ======================================== */
@media (max-width: 1024px) {
  .sidebar {
    width: var(--sidebar-collapsed-width);
  }
  
  .sidebar .sidebar-logo-text,
  .sidebar .nav-section-title,
  .sidebar .nav-text,
  .sidebar .nav-arrow,
  .sidebar .theme-toggle-text {
    display: none;
  }
  
  .header {
    left: var(--sidebar-collapsed-width);
  }
  
  .main-content {
    margin-left: var(--sidebar-collapsed-width);
  }
  
  .search-box {
    width: 240px;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    width: var(--sidebar-width);
  }
  
  .sidebar.mobile-open {
    transform: translateX(0);
  }
  
  .sidebar.mobile-open .sidebar-logo-text,
  .sidebar.mobile-open .nav-section-title,
  .sidebar.mobile-open .nav-text,
  .sidebar.mobile-open .nav-arrow,
  .sidebar.mobile-open .theme-toggle-text {
    display: block;
  }
  
  .header {
    left: 0;
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .search-box {
    display: none;
  }
  
  .user-info {
    display: none;
  }
  
  /* 遮罩层 */
  .sidebar-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-overlay);
    z-index: calc(var(--z-fixed) - 1);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }
  
  .sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
  }
}