/* 公共样式文件 - 后台管理系统 */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #f0f2f5;
    min-height: 100vh;
}

/* 顶部导航 */
.header {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: #fff;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

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

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    padding: 8px 16px;
    background: rgba(255,255,255,0.1);
    border-radius: 8px;
}

.logout-btn {
    padding: 8px 18px;
    background: rgba(255, 107, 107, 0.2);
    color: #ff6b6b;
    border: 1px solid rgba(255, 107, 107, 0.3);
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.logout-btn:hover {
    background: #ff6b6b;
    color: #fff;
}

/* 侧边栏 */
.sidebar {
    position: fixed;
    top: 64px;
    left: 0;
    bottom: 0;
    width: 240px;
    background: #fff;
    border-right: 1px solid #e8e8e8;
    padding: 20px 0;
    overflow-y: auto;
}

.menu-group {
    margin-bottom: 8px;
}

.menu-group-title {
    padding: 12px 24px;
    font-size: 12px;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.menu-item {
    padding: 14px 24px;
    display: flex;
    align-items: center;
    gap: 14px;
    color: #555;
    cursor: pointer;
    transition: all 0.2s;
    border-left: 3px solid transparent;
    font-size: 15px;
    text-decoration: none;
}

.menu-item:hover {
    background: #f5f7fa;
    color: #667eea;
}

.menu-item.active {
    background: linear-gradient(90deg, rgba(102, 126, 234, 0.08) 0%, transparent 100%);
    color: #667eea;
    border-left-color: #667eea;
    font-weight: 600;
}

.menu-icon {
    font-size: 20px;
    width: 24px;
    text-align: center;
}

/* 主内容区 */
.main-content {
    margin-left: 240px;
    margin-top: 64px;
    padding: 24px;
    min-height: calc(100vh - 64px);
}

/* 页面标题 */
.page-header {
    margin-bottom: 24px;
}

.page-title {
    font-size: 24px;
    font-weight: 700;
    color: #1a1a2e;
}

.page-subtitle {
    color: #666;
    font-size: 14px;
    margin-top: 4px;
}

/* 内容卡片 */
.card {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    margin-bottom: 24px;
    overflow: hidden;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid #f0f0f0;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: #1a1a2e;
}

.card-body {
    padding: 24px;
}

/* 按钮样式 */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.btn-primary:hover {
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: #fff;
}

.btn-danger {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: #fff;
}

.btn-default {
    background: #f5f5f5;
    color: #666;
}

.btn-default:hover {
    background: #e8e8e8;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 13px;
    border-radius: 8px;
}

/* 工具栏 */
.toolbar {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.toolbar select, .toolbar input {
    padding: 10px 14px;
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    font-size: 14px;
    outline: none;
    background: #fff;
}

.toolbar select:focus, .toolbar input:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.toolbar-info {
    color: #999;
    font-size: 14px;
    margin-left: auto;
}

/* 表格样式 */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 800px;
}

th, td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid #f0f0f0;
}

th {
    background: #fafafa;
    font-weight: 600;
    color: #666;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

tr:hover {
    background: #fafbfc;
}

/* 状态标签 */
.status-tag {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    display: inline-block;
}

.status-tag.success {
    background: #e6f7ed;
    color: #52c41a;
}

.status-tag.warning {
    background: #fff7e6;
    color: #faad14;
}

.status-tag.error {
    background: #fff2f0;
    color: #ff4d4f;
}

.status-tag.info {
    background: #e6f7ff;
    color: #1890ff;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.modal.show {
    display: flex;
}

.modal-content {
    background: #fff;
    border-radius: 20px;
    width: 100%;
    max-width: 900px;
    max-height: 90vh;
    overflow-y: auto;
    margin: 20px;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.4);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-header {
    padding: 24px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 20px;
    font-weight: 700;
    color: #1a1a2e;
}

.modal-close {
    width: 36px;
    height: 36px;
    border: none;
    background: #f5f5f5;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
    transition: all 0.2s;
}

.modal-close:hover {
    background: #ff6b6b;
    color: #fff;
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 20px 24px;
    border-top: 1px solid #f0f0f0;
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* 表单样式 */
.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: #333;
    font-size: 14px;
}

.form-group label .required {
    color: #ff4d4f;
    margin-left: 4px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #e8e8e8;
    border-radius: 12px;
    font-size: 14px;
    transition: all 0.2s;
    outline: none;
    background: #fafafa;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: #667eea;
    background: #fff;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-hint {
    font-size: 12px;
    color: #999;
    margin-top: 8px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* 操作按钮组 */
.action-btns {
    display: flex;
    gap: 8px;
}

/* 加载状态 */
.loading {
    text-align: center;
    padding: 60px 20px;
    color: #999;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid #f0f0f0;
    border-top-color: #667eea;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 16px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 空状态 */
.empty {
    text-align: center;
    padding: 80px 20px;
    color: #999;
}

.empty-icon {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-text {
    font-size: 16px;
}

/* 分页 */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
}

.pagination button {
    padding: 10px 16px;
    border: 1px solid #e0e0e0;
    background: #fff;
    border-radius: 10px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.pagination button:hover:not(:disabled) {
    border-color: #667eea;
    color: #667eea;
}

.pagination button.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-color: transparent;
    color: #fff;
}

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

/* 响应式 */
@media (max-width: 768px) {
    .sidebar {
        display: none;
    }
    .main-content {
        margin-left: 0;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
}