/* 管理后台样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    color: #333;
    overflow-x: hidden;
}

/* 侧边栏样式 */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 260px;
    height: 100vh;
    background: linear-gradient(180deg, #2c3e50, #34495e);
    z-index: 1000;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h2 {
    color: white;
    font-size: 1.3rem;
    font-weight: 600;
}

.sidebar-header i {
    color: #3498db;
    margin-right: 10px;
}

.sidebar-nav ul {
    list-style: none;
    padding: 1rem 0;
}

.sidebar-nav li {
    margin-bottom: 0.5rem;
}

.sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    color: #bdc3c7;
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.sidebar-nav .nav-link:hover {
    color: white;
    background-color: rgba(255, 255, 255, 0.1);
    border-left-color: #3498db;
}

.sidebar-nav .nav-link.active {
    color: white;
    background-color: rgba(52, 152, 219, 0.2);
    border-left-color: #3498db;
}

.sidebar-nav .nav-link i {
    margin-right: 12px;
    width: 16px;
    text-align: center;
}

/* 主内容区样式 */
.main-content {
    margin-left: 260px;
    min-height: 100vh;
    transition: margin-left 0.3s ease;
}

/* 顶部栏样式 */
.topbar {
    background: white;
    padding: 1rem 1.5rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 999;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sidebar-toggle {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: #666;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 4px;
    transition: background-color 0.3s ease;
    display: none;
}

.sidebar-toggle:hover {
    background-color: #f1f3f4;
}

#page-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2c3e50;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #666;
}

.user-info i {
    font-size: 1.5rem;
    color: #3498db;
}

/* 内容区域样式 */
.content {
    padding: 2rem;
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
}

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

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.stat-card:nth-child(1) .stat-icon {
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.stat-card:nth-child(2) .stat-icon {
    background: linear-gradient(135deg, #f093fb, #f5576c);
}

.stat-card:nth-child(3) .stat-icon {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
}

.stat-card:nth-child(4) .stat-icon {
    background: linear-gradient(135deg, #43e97b, #38f9d7);
}

.stat-info h3 {
    font-size: 2rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 0.25rem;
}

.stat-info p {
    color: #666;
    font-size: 0.9rem;
}

/* 仪表盘图表区域 */
.dashboard-charts {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.chart-container,
.recent-activity {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.chart-container h3,
.recent-activity h3 {
    margin-bottom: 1rem;
    color: #2c3e50;
    font-size: 1.2rem;
}

.chart-placeholder {
    height: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #666;
    background: #f8f9fa;
    border-radius: 8px;
}

.chart-placeholder i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #ddd;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
    transition: background-color 0.3s ease;
}

.activity-item:hover {
    background: #e9ecef;
}

.activity-item i {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #3498db;
    color: white;
    font-size: 0.8rem;
}

.activity-item span {
    flex: 1;
    font-weight: 500;
}

.activity-item small {
    color: #666;
    font-size: 0.8rem;
}

/* 区域标题样式 */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.section-header h2 {
    color: #2c3e50;
    font-size: 1.8rem;
    font-weight: 600;
}

/* 按钮样式 */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.btn-primary {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    box-shadow: 0 2px 10px rgba(52, 152, 219, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.4);
}

.btn-secondary {
    background: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background: #7f8c8d;
}

.btn-danger {
    background: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

/* 表格样式 */
.ads-table-container {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.data-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #2c3e50;
}

.data-table tbody tr:hover {
    background: #f8f9fa;
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
}

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

.status-inactive {
    background: #f8d7da;
    color: #721c24;
}

.ad-image-preview {
    width: 60px;
    height: 40px;
    object-fit: cover;
    border-radius: 4px;
}

.table-actions {
    display: flex;
    gap: 0.5rem;
}

/* 用户卡片样式 */
.users-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.user-card {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, #3498db, #2980b9);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.user-info {
    flex: 1;
}

.user-info h4 {
    margin-bottom: 0.25rem;
    color: #2c3e50;
}

.user-info p {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.user-role {
    background: #e3f2fd;
    color: #1976d2;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
}

.user-actions {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* 设置表单样式 */
.settings-form {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    max-width: 600px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #2c3e50;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: #3498db;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* 开关样式 */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: 0.4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: 0.4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: #3498db;
}

input:checked + .slider:before {
    transform: translateX(26px);
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    border-radius: 10px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    animation: modalSlideIn 0.3s ease;
}

.modal-content.large {
    max-width: 700px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid #eee;
    background: #f8f9fa;
}

.modal-header h2 {
    color: #2c3e50;
    font-size: 1.3rem;
}

.close {
    color: #aaa;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close:hover {
    color: #333;
}

.modal-body {
    padding: 2rem;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #eee;
}

/* 通知样式 */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-width: 300px;
    max-width: 500px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    animation: slideInRight 0.3s ease;
}

.notification-success {
    background-color: #28a745;
}

.notification-error {
    background-color: #dc3545;
}

.notification-info {
    background-color: #007bff;
}

.notification button {
    background: none;
    border: none;
    color: inherit;
    font-size: 1.2rem;
    cursor: pointer;
    margin-left: 1rem;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* 图片上传样式 */
.image-upload-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.upload-options {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 0.5rem;
}

.upload-hint {
    font-size: 0.8rem;
    color: #666;
    font-style: italic;
}

.image-preview-container {
    position: relative;
    margin-top: 1rem;
    max-width: 300px;
}

.image-preview {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: 8px;
    border: 2px solid #ddd;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.image-preview-container button {
    position: absolute;
    top: 5px;
    right: 5px;
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
}

.upload-progress {
    width: 100%;
    height: 4px;
    background-color: #f0f0f0;
    border-radius: 2px;
    overflow: hidden;
    margin-top: 0.5rem;
    display: none;
}

.upload-progress-bar {
    height: 100%;
    background-color: #007bff;
    transition: width 0.3s ease;
    width: 0%;
}

.upload-status {
    font-size: 0.8rem;
    margin-top: 0.5rem;
    padding: 0.5rem;
    border-radius: 4px;
    display: none;
}

.upload-status.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.upload-status.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.upload-status.uploading {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .sidebar-toggle {
        display: block;
    }
    
    .dashboard-charts {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .users-grid {
        grid-template-columns: 1fr;
    }
    
    .user-card {
        flex-direction: column;
        text-align: center;
    }
    
    .user-actions {
        flex-direction: row;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .content {
        padding: 1rem;
    }
    
    .topbar {
        padding: 1rem;
    }
    
    .modal-content {
        margin: 10% auto;
        width: 95%;
    }
    
    .modal-body {
        padding: 1.5rem;
    }
    
    .data-table {
        font-size: 0.8rem;
    }
    
    .data-table th,
    .data-table td {
        padding: 0.5rem;
    }
}