/* 课程班报名系统 - 移动端响应式样式 */

@media (max-width: 992px) {
    /* 详情页布局 */
    .detail-layout {
        grid-template-columns: 1fr;
    }
    
    .detail-sidebar {
        position: static;
    }
    
    /* 后台布局 */
    .admin-sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
        z-index: 1001;
    }
    
    .admin-sidebar.active {
        transform: translateX(0);
    }
    
    .admin-main {
        margin-left: 0;
    }
    
    .mobile-menu-toggle {
        display: block !important;
    }
}

@media (max-width: 768px) {
    /* 头部 */
    .header-inner {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }
    
    .nav-menu a {
        padding: 6px 12px;
        font-size: 14px;
    }
    
    /* 容器 */
    .container {
        padding: 15px;
    }
    
    /* 页面标题 */
    .page-title {
        font-size: 22px;
    }
    
    /* 课程网格 */
    .course-grid {
        grid-template-columns: 1fr;
    }
    
    /* 筛选区域 */
    .filter-row {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-item {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-item label {
        margin-bottom: 5px;
    }
    
    /* 统计卡片 */
    .stat-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-card {
        padding: 15px;
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
    
    .stat-icon {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
    
    .stat-info h3 {
        font-size: 24px;
    }
    
    /* 详情页 */
    .detail-header {
        padding: 20px;
    }
    
    .detail-header h1 {
        font-size: 20px;
    }
    
    .detail-meta {
        flex-direction: column;
        gap: 10px;
    }
    
    .detail-content {
        padding: 20px;
    }
    
    .detail-stats {
        grid-template-columns: 1fr;
    }
    
    /* 表格 */
    .data-table th,
    .data-table td {
        padding: 10px;
        font-size: 13px;
    }
    
    /* 按钮 */
    .btn {
        padding: 10px 18px;
    }
    
    .btn-lg {
        padding: 12px 25px;
        font-size: 15px;
    }
    
    /* 模态框 */
    .modal {
        width: 95%;
        margin: 10px;
    }
    
    /* 分页 */
    .pagination a,
    .pagination span {
        min-width: 32px;
        height: 32px;
        padding: 0 8px;
        font-size: 13px;
    }
    
    /* 后台 */
    .admin-main {
        padding: 15px;
    }
    
    .admin-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    
    .admin-header h1 {
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    /* Logo */
    .logo {
        font-size: 18px;
    }
    
    .logo i {
        font-size: 22px;
    }
    
    /* 统计卡片 */
    .stat-cards {
        grid-template-columns: 1fr;
    }
    
    /* 卡片 */
    .card-header {
        padding: 15px;
        font-size: 16px;
    }
    
    .card-body {
        padding: 15px;
    }
    
    /* 课程卡片 */
    .course-card-header {
        padding: 15px;
    }
    
    .course-card-header h3 {
        font-size: 16px;
    }
    
    .course-card-body {
        padding: 15px;
    }
    
    .course-card-footer {
        padding: 12px 15px;
    }
    
    /* 表单 */
    .form-control {
        padding: 10px 12px;
    }
    
    /* 支付页面 */
    .qrcode-section {
        padding: 20px;
    }
    
    .qrcode-section img {
        max-width: 200px;
    }
    
    .upload-section {
        padding: 20px;
    }
    
    .upload-section i {
        font-size: 36px;
    }
    
    /* 支付信息 */
    .payment-info-row {
        flex-direction: column;
        gap: 5px;
    }
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 24px;
    cursor: pointer;
    padding: 5px;
}

/* 移动端遮罩 */
.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.mobile-overlay.active {
    display: block;
}