/**
 * 数据预览模块样式
 * 统一的表格预览、变量选择器样式
 */

/* 数据预览容器 */
.data-preview-container {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    margin-bottom: 1rem;
    overflow: hidden;
}

/* 空状态 */
.data-preview-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    color: var(--text-secondary);
    text-align: center;
}

.data-preview-empty-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
    opacity: 0.5;
}

.data-preview-empty p {
    margin: 0;
    font-size: 0.95rem;
}

.data-preview-empty-hint {
    font-size: 0.85rem !important;
    color: var(--text-muted);
    margin-top: 0.5rem !important;
}

/* 预览头部 */
.data-preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-bottom: 1px solid var(--gray-200);
}

.data-preview-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.data-preview-icon {
    font-size: 1.1rem;
}

.data-preview-badge {
    background: var(--primary);
    color: white;
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 500;
}

.data-preview-source {
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* 表格容器 */
.data-preview-table-wrap {
    overflow-x: auto;
    max-height: 300px;
    overflow-y: auto;
}

/* 预览表格 */
.data-preview-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.data-preview-table th,
.data-preview-table td {
    padding: 0.5rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--gray-100);
    white-space: nowrap;
}

.data-preview-table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--text-primary);
    position: sticky;
    top: 0;
    z-index: 1;
}

.data-preview-table tbody tr:hover {
    background: rgba(37, 99, 235, 0.03);
}

/* 行号列 */
.data-preview-row-num {
    width: 40px;
    text-align: center !important;
    color: var(--text-muted);
    font-size: 0.75rem;
    background: var(--gray-50) !important;
}

/* 表头内容 */
.data-preview-th-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.data-preview-col-name {
    font-weight: 600;
}

.data-preview-col-role {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--primary);
}

/* X列高亮 */
.data-preview-x-col {
    background: rgba(37, 99, 235, 0.08) !important;
}

.data-preview-table th.data-preview-x-col {
    background: rgba(37, 99, 235, 0.15) !important;
    border-left: 3px solid var(--primary);
}

/* Y列高亮 */
.data-preview-y-col {
    background: rgba(16, 185, 129, 0.08) !important;
}

.data-preview-table th.data-preview-y-col {
    background: rgba(16, 185, 129, 0.15) !important;
    border-left: 3px solid var(--success);
}

.data-preview-table th.data-preview-y-col .data-preview-col-role {
    color: var(--success);
}

/* 更多行提示 */
.data-preview-more-row {
    background: var(--gray-50) !important;
}

.data-preview-more-row td {
    text-align: center !important;
    color: var(--text-muted);
    font-style: italic;
    font-size: 0.8rem;
    padding: 0.75rem;
}

/* 变量选择器 */
.data-preview-var-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    padding: 1rem;
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
}

.data-preview-var-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.data-preview-var-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.data-preview-var-icon {
    font-size: 1rem;
}

.data-preview-select {
    padding: 0.5rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    background: white;
    cursor: pointer;
    transition: border-color 0.2s;
}

.data-preview-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.data-preview-select[multiple] {
    min-height: 80px;
}

.data-preview-var-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0;
}

/* 数据加载动画 */
.data-preview-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    color: var(--text-secondary);
}

.data-preview-loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: dataPreviewSpin 0.8s linear infinite;
    margin-bottom: 0.75rem;
}

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

/* 数据加载成功动画 */
@keyframes dataPreviewFadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.data-preview-container {
    animation: dataPreviewFadeIn 0.3s ease;
}

/* 单元格样式 */
.data-preview-cell {
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 响应式 */
@media (max-width: 768px) {
    .data-preview-var-selector {
        grid-template-columns: 1fr;
    }

    .data-preview-table th,
    .data-preview-table td {
        padding: 0.4rem 0.5rem;
        font-size: 0.8rem;
    }

    .data-preview-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    .data-preview-table th,
    .data-preview-table td {
        padding: 0.3rem 0.4rem;
        font-size: 0.72rem;
    }

    .data-preview-header {
        gap: 0.35rem;
    }

    .data-preview-header span {
        font-size: 0.85rem;
    }
}