/* 后台管理系统样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --admin-primary: #4CAF50;
    --admin-danger: #f44336;
    --admin-warning: #ff9800;
    --admin-info: #2196F3;
    --admin-success: #4CAF50;
    --sidebar-width: 250px;
    --top-bar-height: 70px;
    --bg-dark: #1a1a2e;
    --bg-light: #16213e;
    --bg-card: #0f1624;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --border-color: rgba(255, 255, 255, 0.1);
}

/* 登录页面样式 */
.login-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.login-container {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 40px;
    width: 90%;
    max-width: 450px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 10;
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header .logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 15px;
}

.login-header .logo-icon {
    font-size: 2.5rem;
}

.login-header .logo-text {
    font-size: 1.5rem;
    font-weight: bold;
    background: linear-gradient(to right, #667eea, #764ba2);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.login-header h2 {
    color: #333;
    font-size: 1.3rem;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-form label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
}

.login-form input[type="text"],
.login-form input[type="password"] {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s;
}

.login-form input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.checkbox-group label {
    cursor: pointer;
    user-select: none;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.btn-login {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 10px;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.login-tips {
    margin-top: 20px;
    text-align: center;
    color: #666;
    font-size: 0.9rem;
}

.login-tips p {
    margin: 5px 0;
}

.login-tips a {
    color: #667eea;
    text-decoration: none;
}

.login-footer {
    margin-top: 20px;
    text-align: center;
    color: #999;
    font-size: 0.85rem;
}

/* 后台管理页面布局 */
.admin-page {
    display: flex;
    background-color: var(--bg-dark);
    min-height: 100vh;
    color: var(--text-primary);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* 侧边栏 */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-light);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    display: flex;
    flex-direction: column;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
    z-index: 100;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
}

.sidebar .logo-icon {
    font-size: 1.8rem;
}

.sidebar .logo-text {
    font-size: 1.2rem;
    font-weight: bold;
}

.sidebar-menu {
    flex: 1;
    padding: 20px 0;
    overflow-y: auto;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s;
    position: relative;
}

.menu-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.menu-item.active {
    background-color: rgba(76, 175, 80, 0.1);
    color: var(--admin-primary);
    border-left: 3px solid var(--admin-primary);
}

.menu-icon {
    font-size: 1.3rem;
}

.menu-text {
    flex: 1;
}

.badge {
    background-color: var(--admin-danger);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: bold;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
}

.btn-back,
.btn-logout {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px;
    margin: 5px 0;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.btn-back {
    background-color: rgba(33, 150, 243, 0.2);
}

.btn-back:hover {
    background-color: rgba(33, 150, 243, 0.3);
}

.btn-logout {
    background-color: rgba(244, 67, 54, 0.2);
}

.btn-logout:hover {
    background-color: rgba(244, 67, 54, 0.3);
}

/* 主内容区 */
.main-content {
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    min-height: 100vh;
    padding: 20px;
}

/* 顶部栏 */
.top-bar {
    background-color: var(--bg-light);
    padding: 20px 30px;
    border-radius: 12px;
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.top-bar h1 {
    font-size: 1.8rem;
    color: var(--text-primary);
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.welcome {
    color: var(--text-secondary);
}

.time {
    color: var(--admin-info);
    font-weight: 500;
}

/* 统计卡片 */
.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background-color: var(--bg-light);
    padding: 25px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    transition: all 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
}

.stat-card.blue { border-left: 4px solid var(--admin-info); }
.stat-card.orange { border-left: 4px solid var(--admin-warning); }
.stat-card.green { border-left: 4px solid var(--admin-success); }
.stat-card.purple { border-left: 4px solid #9c27b0; }

.stat-icon {
    font-size: 2.5rem;
}

.stat-info {
    flex: 1;
}

.stat-value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-primary);
}

.stat-label {
    color: var(--text-secondary);
    margin-top: 5px;
}

.stat-trend {
    font-size: 0.9rem;
    padding: 4px 10px;
    border-radius: 20px;
    background-color: rgba(255, 255, 255, 0.1);
}

.stat-trend.up {
    color: var(--admin-success);
}

.stat-trend.down {
    color: var(--admin-danger);
}

/* 快捷操作 */
.quick-actions,
.recent-activity,
.popular-resources {
    background-color: var(--bg-light);
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.quick-actions h2,
.recent-activity h2,
.popular-resources h2 {
    margin-bottom: 20px;
    color: var(--text-primary);
    font-size: 1.4rem;
}

.action-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.action-card {
    background-color: var(--bg-card);
    padding: 25px;
    border-radius: 10px;
    text-align: center;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s;
    border: 1px solid var(--border-color);
}

.action-card:hover {
    transform: translateY(-5px);
    border-color: var(--admin-primary);
    box-shadow: 0 5px 15px rgba(76, 175, 80, 0.2);
}

.action-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.action-card h3 {
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.action-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 活动列表 */
.activity-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background-color: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.activity-icon {
    font-size: 1.8rem;
}

.activity-content {
    flex: 1;
}

.activity-title {
    color: var(--text-primary);
    margin-bottom: 5px;
}

.activity-time {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.activity-action {
    padding: 6px 15px;
    background-color: var(--admin-primary);
    color: white;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.activity-action:hover {
    background-color: #45a049;
}

/* 数据表格 */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-card);
    border-radius: 8px;
    overflow: hidden;
}

.data-table thead {
    background-color: rgba(76, 175, 80, 0.1);
}

.data-table th {
    padding: 15px;
    text-align: left;
    color: var(--admin-primary);
    font-weight: 600;
}

.data-table td {
    padding: 15px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.data-table tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.rank {
    display: inline-block;
    width: 30px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    font-weight: bold;
}

.rank-1 { background-color: #FFD700; color: #000; }
.rank-2 { background-color: #C0C0C0; color: #000; }
.rank-3 { background-color: #CD7F32; color: #fff; }

.category-badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 500;
}

.category-badge.software { background-color: rgba(33, 150, 243, 0.2); color: #2196F3; }
.category-badge.document { background-color: rgba(76, 175, 80, 0.2); color: #4CAF50; }
.category-badge.video { background-color: rgba(255, 152, 0, 0.2); color: #ff9800; }
.category-badge.code { background-color: rgba(156, 39, 176, 0.2); color: #9c27b0; }
.category-badge.design { background-color: rgba(233, 30, 99, 0.2); color: #e91e63; }
.category-badge.other { background-color: rgba(158, 158, 158, 0.2); color: #9e9e9e; }

.trend-up { color: var(--admin-success); }
.trend-down { color: var(--admin-danger); }

/* 筛选栏 */
.filter-bar {
    background-color: var(--bg-light);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    align-items: center;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.filter-group label {
    color: var(--text-secondary);
    white-space: nowrap;
}

.filter-group select,
.search-input {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-card);
    color: var(--text-primary);
    outline: none;
}

.search-input {
    min-width: 250px;
}

.btn-search,
.btn-primary,
.btn-secondary,
.btn-success,
.btn-danger {
    padding: 8px 20px;
    border: none;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

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

.btn-search:hover,
.btn-primary:hover {
    background-color: #45a049;
}

.btn-secondary {
    background-color: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

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

.btn-success:hover {
    background-color: #45a049;
}

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

.btn-danger:hover {
    background-color: #da190b;
}

/* 审核列表 */
.review-list {
    background-color: var(--bg-light);
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.review-header,
.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.review-header h2,
.list-header h2 {
    color: var(--text-primary);
    font-size: 1.4rem;
}

.batch-actions {
    display: flex;
    gap: 10px;
}

.review-item {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    display: flex;
    gap: 15px;
}

.review-checkbox {
    padding-top: 5px;
}

.review-content {
    flex: 1;
}

.review-main {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.review-icon {
    font-size: 2.5rem;
}

.review-info {
    flex: 1;
}

.review-info h3 {
    color: var(--text-primary);
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.review-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 10px;
}

.review-meta {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.review-details {
    background-color: rgba(255, 255, 255, 0.02);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 15px;
}

.detail-item {
    margin: 8px 0;
    color: var(--text-secondary);
}

.detail-item strong {
    color: var(--text-primary);
}

.detail-item a {
    color: var(--admin-info);
    text-decoration: none;
}

.tag {
    display: inline-block;
    padding: 4px 10px;
    background-color: rgba(76, 175, 80, 0.2);
    color: var(--admin-primary);
    border-radius: 12px;
    font-size: 0.85rem;
    margin-right: 8px;
    margin-top: 5px;
}

.review-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn-approve {
    background-color: var(--admin-success);
    color: white;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-approve:hover {
    background-color: #45a049;
}

.btn-reject {
    background-color: var(--admin-danger);
    color: white;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-reject:hover {
    background-color: #da190b;
}

.btn-detail {
    background-color: var(--admin-info);
    color: white;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-detail:hover {
    background-color: #0b7dda;
}

/* 资源管理 */
.resource-management {
    background-color: var(--bg-light);
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.resource-name {
    display: flex;
    align-items: center;
    gap: 10px;
}

.resource-icon {
    font-size: 1.5rem;
}

.status-badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 500;
}

.status-badge.active {
    background-color: rgba(76, 175, 80, 0.2);
    color: var(--admin-success);
}

.status-badge.pending {
    background-color: rgba(255, 152, 0, 0.2);
    color: var(--admin-warning);
}

.action-buttons {
    display: flex;
    gap: 8px;
}

.btn-edit,
.btn-delete {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 5px;
    transition: all 0.3s;
}

.btn-edit:hover {
    transform: scale(1.2);
}

.btn-delete:hover {
    transform: scale(1.2);
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.pagination button {
    padding: 8px 15px;
    background-color: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
}

.pagination button:hover:not(:disabled) {
    background-color: rgba(76, 175, 80, 0.2);
    border-color: var(--admin-primary);
}

.pagination button.active {
    background-color: var(--admin-primary);
    color: white;
    border-color: var(--admin-primary);
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background-color: var(--bg-light);
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.modal-content.large {
    max-width: 800px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 20px;
}

.reject-reasons {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 15px 0;
}

.reject-reasons label {
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    transition: all 0.3s;
}

.reject-reasons label:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.reject-reasons input[type="radio"] {
    margin-right: 10px;
}

#rejectNote {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-card);
    color: var(--text-primary);
    font-family: inherit;
    resize: vertical;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* 编辑表单 */
.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-card);
    color: var(--text-primary);
    font-family: inherit;
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--admin-primary);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        width: 100%;
    }
    
    .stats-cards {
        grid-template-columns: 1fr;
    }
    
    .action-cards {
        grid-template-columns: 1fr;
    }
    
    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .review-item {
        flex-direction: column;
    }
}