:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --finance-color: #28a745;
            --risk-color: #dc3545;
            --return-color: #ffc107;
            --accent-color: #01497c;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --danger-color: #dc3545;
            --chart-1: #2c7da0;
            --chart-2: #28a745;
            --chart-3: #ffc107;
            --chart-4: #dc3545;
            --chart-5: #6f42c1;
        }
      .page-header {
            background: linear-gradient(135deg, rgba(169, 214, 229, 0.4) 0%, rgba(44, 125, 160, 0.4) 100%);
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid rgba(44, 125, 160, 0.2);
            position: relative;
            overflow: hidden;   color: var(--text-color);
        }
        .breadcrumb {
            background-color: transparent;
            padding: 0.5rem 0;
            margin-bottom: 0.5rem;
        }
        .breadcrumb-item a {
            color: var(--text-muted);
            text-decoration: none;
        }
        .breadcrumb-item.active {
            color: var(--text-color);
        }
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(44, 125, 160, 0.15);
        }
        .data-input-container {
            background-color: var(--light-gray);
            border-radius: 8px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
        }
        .data-input-row {
            display: flex;
            align-items: center;
            margin-bottom: 10px;
            padding: 8px;
            background-color: white;
            border-radius: 4px;
            border: 1px solid #eee;
        }
        .data-input-label {
            min-width: 80px;
            font-weight: 600;
            color: var(--text-color);
        }
        .data-input-field {
            flex: 1;
            margin: 0 10px;
        }
        .data-input-value {
            min-width: 100px;
            font-weight: 600;
            color: var(--finance-color);
            text-align: right;
        }
        .remove-data-btn {
            background: none;
            border: none;
            color: var(--danger-color);
            cursor: pointer;
            padding: 5px;
        }
        .metric-card {
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            margin-bottom: 1.5rem;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
            height: 100%;
        }
        .metric-value {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            line-height: 1;
        }
        .metric-value.positive {
            color: var(--success-color);
        }
        .metric-value.negative {
            color: var(--danger-color);
        }
        .metric-value.neutral {
            color: var(--warning-color);
        }
        .metric-label {
            color: var(--text-muted);
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .metric-description {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 0.5rem;
        }
        .finance-box {
            background-color: rgba(40, 167, 69, 0.05);
            border-left: 3px solid var(--finance-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        .risk-box {
            background-color: rgba(220, 53, 69, 0.05);
            border-left: 3px solid var(--risk-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
        }
        .comparison-table th, .comparison-table td {
            padding: 0.75rem;
            text-align: center;
            border: 1px solid var(--border-color);
        }
        .comparison-table th {
            background-color: var(--light-gray);
            font-weight: 600;
        }
        .comparison-table tr:nth-child(even) {
            background-color: rgba(44, 125, 160, 0.05);
        }
        .interpretation-guide {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .interpretation-item {
            display: flex;
            align-items: center;
            padding: 1rem;
            background-color: white;
            border-radius: 6px;
            border: 1px solid var(--border-color);
        }
        .interpretation-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 1rem;
            flex-shrink: 0;
            font-size: 1.2rem;
        }
        .interpretation-icon.excellent {
            background-color: rgba(40, 167, 69, 0.1);
            color: var(--success-color);
        }
        .interpretation-icon.good {
            background-color: rgba(40, 167, 69, 0.05);
            color: var(--success-color);
        }
        .interpretation-icon.acceptable {
            background-color: rgba(255, 193, 7, 0.1);
            color: var(--warning-color);
        }
        .interpretation-icon.poor {
            background-color: rgba(220, 53, 69, 0.1);
            color: var(--danger-color);
        }
        .portfolio-comparison {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin: 1.5rem 0;
        }
        .portfolio-card {
            flex: 1;
            min-width: 250px;
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
            transition: transform 0.3s;
        }
        .portfolio-card:hover {
            transform: translateY(-5px);
        }
        .portfolio-name {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--primary-color);
        }
        .portfolio-sortino {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .dataset-examples {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .example-btn {
            background-color: rgba(44, 125, 160, 0.1);
            border: 1px solid rgba(44, 125, 160, 0.2);
            border-radius: 4px;
            padding: 0.5rem 0.75rem;
            font-size: 0.9rem;
            color: var(--primary-color);
            cursor: pointer;
            transition: all 0.2s;
        }
        .example-btn:hover {
            background-color: rgba(44, 125, 160, 0.2);
            transform: translateY(-2px);
        }
        .return-distribution {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .return-item {
            flex: 1;
            min-width: 150px;
            padding: 1rem;
            background-color: white;
            border-radius: 6px;
            border: 1px solid var(--border-color);
            text-align: center;
        }
        .return-value {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 0.25rem;
        }
        .return-label {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .portfolio-card {
                min-width: 100%;
            }
        }
        .form-tabs {
            display: flex;
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 1.5rem;
        }
        .form-tab {
            padding: 0.75rem 1.5rem;
            cursor: pointer;
            border-bottom: 3px solid transparent;
            font-weight: 500;
        }
        .form-tab.active {
            border-bottom-color: var(--primary-color);
            color: var(--primary-color);
            font-weight: 600;
        }
        .tab-content {
            display: none;
        }
        .tab-content.active {
            display: block;
        }
        .input-mode-selector {
            display: flex;
            margin-bottom: 1.5rem;
            border-radius: 6px;
            overflow: hidden;
            border: 1px solid var(--border-color);
        }
        .input-mode {
            flex: 1;
            padding: 0.75rem;
            text-align: center;
            cursor: pointer;
            background-color: var(--light-gray);
            transition: all 0.3s;
        }
        .input-mode.active {
            background-color: var(--primary-color);
            color: white;
        }
        .ratio-badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-left: 0.5rem;
        }
        .ratio-badge.excellent {
            background-color: rgba(40, 167, 69, 0.1);
            color: var(--success-color);
        }
        .ratio-badge.good {
            background-color: rgba(40, 167, 69, 0.1);
            color: var(--success-color);
        }
        .ratio-badge.acceptable {
            background-color: rgba(255, 193, 7, 0.1);
            color: var(--warning-color);
        }
        .ratio-badge.poor {
            background-color: rgba(220, 53, 69, 0.1);
            color: var(--danger-color);
        }
        .annualization-options {
            background-color: rgba(44, 125, 160, 0.05);
            border-radius: 8px;
            padding: 1rem;
            margin: 1rem 0;
            border: 1px solid rgba(44, 125, 160, 0.2);
        }
        .statistical-warning {
            background-color: rgba(255, 193, 7, 0.1);
            border-left: 3px solid var(--warning-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1rem 0;
        }
        .data-validation-alert {
            margin: 1rem 0;
        }
        .infinite-value {
            color: var(--primary-color);
            font-style: italic;
        }
        .calculation-notes {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 0.5rem;
        }