/* ==================== Admin后台样式 ==================== */

:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --admin-bg: #f5f5f5;
    --sidebar-bg: #343a40;
    --sidebar-hover: #495057;
}

/* ==================== 全局样式 ==================== */

body {
    background-color: var(--admin-bg);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.admin-container {
    min-height: 100vh;
}

/* ==================== 侧边栏样式 ==================== */

.admin-sidebar {
    background-color: var(--sidebar-bg);
    min-height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    width: 250px;
    z-index: 1000;
    transition: all 0.3s ease;
}

.admin-sidebar.collapsed {
    width: 60px;
}

.sidebar-header {
    padding: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.sidebar-brand {
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
}

.sidebar-brand:hover {
    color: var(--warning-color);
    text-decoration: none;
}

.sidebar-nav {
    padding: 1rem 0;
}

.sidebar-nav .nav-link {
    color: rgba(255, 255, 255, 0.8);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
}

.sidebar-nav .nav-link:hover {
    color: white;
    background-color: var(--sidebar-hover);
    text-decoration: none;
}

.sidebar-nav .nav-link.active {
    color: white;
    background-color: var(--primary-color);
}

.sidebar-nav .nav-link i {
    margin-right: 0.75rem;
    width: 20px;
    text-align: center;
}

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

.admin-main {
    margin-left: 250px;
    transition: all 0.3s ease;
}

.admin-main.expanded {
    margin-left: 60px;
}

.admin-header {
    background-color: white;
    border-bottom: 1px solid #dee2e6;
    padding: 1rem 2rem;
    display: flex;
    justify-content: between;
    align-items: center;
}

.admin-content {
    padding: 2rem;
}

/* ==================== 卡片样式 ==================== */

.admin-card {
    background-color: white;
    border-radius: 0.5rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    margin-bottom: 1.5rem;
}

.admin-card-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #dee2e6;
    background-color: #f8f9fa;
    border-radius: 0.5rem 0.5rem 0 0;
}

.admin-card-body {
    padding: 1.5rem;
}

/* ==================== 统计卡片 ==================== */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: linear-gradient(135deg, var(--primary-color), #0056b3);
    color: white;
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.1);
}

.stat-card.success {
    background: linear-gradient(135deg, var(--success-color), #146c43);
}

.stat-card.warning {
    background: linear-gradient(135deg, var(--warning-color), #e0a800);
}

.stat-card.info {
    background: linear-gradient(135deg, var(--info-color), #0aa2c0);
}

.stat-number {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* ==================== 表格样式 ==================== */

.admin-table {
    background-color: white;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.admin-table .table {
    margin-bottom: 0;
}

.admin-table .table th {
    background-color: #f8f9fa;
    border-bottom: 2px solid #dee2e6;
    font-weight: 600;
    color: var(--dark-color);
}

.admin-table .table td {
    vertical-align: middle;
}

/* ==================== 按钮样式 ==================== */

.btn-admin {
    border-radius: 0.375rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: all 0.2s ease;
}

.btn-admin-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.btn-admin-primary:hover {
    background-color: #0b5ed7;
    border-color: #0a58ca;
    color: white;
}

.btn-admin-success {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

.btn-admin-warning {
    background-color: var(--warning-color);
    border-color: var(--warning-color);
    color: var(--dark-color);
}

.btn-admin-danger {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
    color: white;
}

/* ==================== 表单样式 ==================== */

.admin-form {
    background-color: white;
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.form-label {
    font-weight: 500;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

/* ==================== 模态框样式 ==================== */

.admin-modal .modal-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid #dee2e6;
}

.admin-modal .modal-title {
    font-weight: 600;
    color: var(--dark-color);
}

/* ==================== 加载状态 ==================== */

.loading-spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-content {
    background-color: white;
    padding: 2rem;
    border-radius: 0.5rem;
    text-align: center;
}

/* ==================== 响应式设计 ==================== */

@media (max-width: 768px) {
    .admin-sidebar {
        transform: translateX(-100%);
    }
    
    .admin-sidebar.show {
        transform: translateX(0);
    }
    
    .admin-main {
        margin-left: 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .admin-content {
        padding: 1rem;
    }
}

/* ==================== 工具类 ==================== */

.text-truncate-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.cursor-pointer {
    cursor: pointer;
}

.border-left-primary {
    border-left: 4px solid var(--primary-color);
}

.border-left-success {
    border-left: 4px solid var(--success-color);
}

.border-left-warning {
    border-left: 4px solid var(--warning-color);
}

.border-left-danger {
    border-left: 4px solid var(--danger-color);
}

/* ==================== 状态标签 ==================== */

.status-badge {
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
}

.status-pending {
    background-color: #fff3cd;
    color: #856404;
}

.status-shipped {
    background-color: #d1ecf1;
    color: #0c5460;
}

.status-delivered {
    background-color: #d4edda;
    color: #155724;
}

/* ==================== 分页样式 ==================== */

.pagination-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 1rem;
}

.pagination-info {
    margin: 0 1rem;
    color: var(--secondary-color);
}

/* ==================== 搜索框样式 ==================== */

.search-box {
    position: relative;
    max-width: 300px;
}

.search-box .form-control {
    padding-left: 2.5rem;
}

.search-box .search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--secondary-color);
}

/* ==================== 通知样式 ==================== */

.notification {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 9999;
    max-width: 400px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.notification.success {
    background-color: var(--success-color);
    color: white;
}

.notification.error {
    background-color: var(--danger-color);
    color: white;
}

.notification.warning {
    background-color: var(--warning-color);
    color: var(--dark-color);
}

.notification.info {
    background-color: var(--info-color);
    color: white;
}