:root {
            --primary-color: #4e54c8;
            --secondary-color: #8f94fb;
            --accent-color: #3f51b5;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --header-bg: #f0f4f8;
            --chart-bg: #ffffff;
        }
         .breadcrumb-item a,.breadcrumb-item.active{    color: var(--text-muted);}
        .page-header {
            background: linear-gradient(135deg, rgba(143, 148, 251, 0.2) 0%, rgba(78, 84, 200, 0.2) 100%);
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid rgba(78, 84, 200, 0.2);
            position: relative;
            overflow: hidden;color:black
        }
        
        . 
        /* Data Input */
        .data-input {
            margin-bottom: 1.5rem;
        }
        
        .data-tabs {
            display: flex;
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 1rem;
        }
        
        .data-tab {
            padding: 0.5rem 1rem;
            cursor: pointer;
            border-bottom: 3px solid transparent;
            transition: all 0.3s;
        }
        
        .data-tab.active {
            border-bottom: 3px solid var(--primary-color);
            color: var(--primary-color);
            font-weight: 600;
        }
        
        .data-content {
            display: none;
        }
        
        .data-content.active {
            display: block;
        }
        
        .data-textarea {
            width: 100%;
            height: 200px;
            padding: 0.75rem;
            border-radius: 6px;
            border: 1px solid #ddd;
            font-family: 'Courier New', monospace;
            font-size: 0.9rem;
        }
        
        .file-upload {
            border: 2px dashed var(--border-color);
            border-radius: 6px;
            padding: 1.5rem;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .file-upload:hover {
            border-color: var(--primary-color);
            background-color: rgba(78, 84, 200, 0.05);
        }
        
        .file-upload i {
            font-size: 2rem;
            color: var(--text-muted);
            margin-bottom: 0.5rem;
        }
        
        /* Data Preview */
        .data-preview {
            margin-top: 1.5rem;
            overflow-x: auto;
        }
        
        .preview-table {
            width: 100%;
            border-collapse: collapse;
        }
        
        .preview-table th, .preview-table td {
            padding: 0.5rem;
            border: 1px solid var(--border-color);
            text-align: left;
        }
        
        .preview-table th {
            background-color: var(--light-gray);
            font-weight: 600;
        }
        
        /* Chart Configuration */
        .chart-config {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
            margin-bottom: 1.5rem;
        }
        
        .config-group {
            margin-bottom: 1rem;
        }
        
        .config-label {
            font-weight: 600;
            margin-bottom: 0.5rem;
            display: block;
        }
        
        /* Chart Preview */
        .chart-preview {
            background-color: var(--chart-bg);
            border-radius: 8px;
            border: 1px solid var(--border-color);
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            height: 400px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .chart-container {
            width: 100%;
            height: 100%;
            position: relative;
        }
        
        /* Action Buttons */
        .action-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
        }
        
        .action-btn {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.5rem;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .generate-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
        }
        
        .generate-btn:hover {
            background-color: var(--accent-color);
            transform: translateY(-2px);
        }
        
        .download-btn {
            background-color: white;
            color: var(--primary-color);
            border: 1px solid var(--primary-color);
        }
        
        .download-btn:hover {
            background-color: rgba(78, 84, 200, 0.1);
        }
        
        /* Sample Data */
        .sample-data {
            margin-top: 1.5rem;
        }
        
        .sample-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--primary-color);
        }
        
        .sample-cards {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1rem;
        }
        
        .sample-card {
            padding: 1rem;
            border-radius: 6px;
            background-color: var(--light-gray);
            border: 1px solid var(--border-color);
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .sample-card:hover {
            background-color: white;
            border-color: var(--primary-color);
            box-shadow: 0 2px 8px rgba(78, 84, 200, 0.1);
        }
        
        .sample-name {
            font-weight: 600;
            margin-bottom: 0.25rem;
        }
        
        .sample-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        
        /* Expandable Section */
        .expandable-section {
            margin-top: 1.5rem;
        }
        
        .expand-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0.75rem 1rem;
            background-color: var(--light-gray);
            border-radius: 6px;
            cursor: pointer;
            border: 1px solid var(--border-color);
        }
        
        .expand-title {
            font-weight: 600;
            color: var(--primary-color);
        }
        
        .expand-icon {
            transition: transform 0.3s;
        }
        
        .expand-content {
            display: none;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            border-top: none;
            border-radius: 0 0 6px 6px;
        }
        
        .expanded .expand-icon {
            transform: rotate(180deg);
        }
        
        /* Footer */
        .footer {
            background-color: var(--light-gray);
            padding: 2rem 0;
            margin-top: 2rem;
            border-top: 1px solid var(--border-color);
        }
        
        /* Tool Intro */
        .tool-intro {
            margin: 3rem 0;
            padding: 2rem;
            background-color: var(--light-gray);
            border-radius: 8px;
            border: 1px solid var(--border-color);
        }
        
        .intro-title {
            font-weight: 600;
            margin-bottom: 1.5rem;
            color: var(--primary-color);
            text-align: center;
        }
        
        .intro-content {
            line-height: 1.8;
        }
        
        /* FAQ Section */
        .faq-section {
            margin: 3rem 0;
        }
        
        .faq-title {
            font-weight: 600;
            margin-bottom: 1.5rem;
            color: var(--primary-color);
            text-align: center;
        }
        
        .faq-item {
            margin-bottom: 1.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px dashed var(--border-color);
        }
        
        .faq-question {
            font-weight: 600;
            margin-bottom: 0.75rem;
            color: var(--accent-color);
        }
        
        .faq-answer {
            color: var(--text-muted);
            line-height: 1.7;
        }
        
        /* Tips List */
        .tips-list {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        
        .tip-item {
            display: flex;
            gap: 1rem;
        }
        
        .tip-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--light-gray);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-color);
            flex-shrink: 0;
        }
        
        .tip-content {
            flex: 1;
        }
        
        .tip-title {
            font-weight: 600;
            margin-bottom: 0.25rem;
        }
        
        .tip-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        
        /* Responsive Adjustments */
        @media (max-width: 767px) {
            .chart-config {
                grid-template-columns: 1fr;
            }
            
            .action-buttons {
                flex-direction: column;
            }
        }