.converter-card {
            background: linear-gradient(145deg, rgba(58, 134, 255, 0.05), rgba(42, 157, 143, 0.05));
            border-radius: 8px;
            border: 1px solid rgba(58, 134, 255, 0.2);
            padding: 2rem;
            margin-bottom: 1.5rem;
        }
        .converter-icon {
            font-size: 2.5rem;
            color: var(--chemistry-color);
            margin-bottom: 1rem;
        }
        .conversion-controls {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 2rem 0;
        }
        .conversion-unit {
            flex: 1;
            min-width: 200px;
        }
        .conversion-arrow {
            font-size: 2rem;
            color: var(--primary-color);
            margin: 0 1rem;
        }
        @media (max-width: 768px) {
            .conversion-arrow {
                transform: rotate(90deg);
                margin: 1rem 0;
            }
        }
        .conversion-result {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--chemistry-color);
            text-align: center;
            padding: 1.5rem;
            background-color: white;
            border-radius: 8px;
            margin: 1rem 0;
            border-left: 5px solid var(--chemistry-color);
        }
        .result-unit {
            font-size: 1.2rem;
            color: var(--text-muted);
            margin-left: 0.5rem;
        }
        .conversion-matrix {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            gap: 1rem;
            margin: 2rem 0;
        }
        .matrix-item {
            background-color: white;
            border-radius: 6px;
            padding: 1rem;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: transform 0.3s;
        }
        .matrix-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .matrix-value {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--chemistry-color);
            margin-bottom: 0.5rem;
        }
        .matrix-unit {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .chemistry-box {
            background-color: rgba(42, 157, 143, 0.05);
            border-left: 3px solid var(--chemistry-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        .unit-examples {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .unit-example {
            background-color: rgba(58, 134, 255, 0.1);
            border: 1px solid rgba(58, 134, 255, 0.2);
            border-radius: 4px;
            padding: 0.5rem 0.75rem;
            font-size: 0.9rem;
            color: var(--primary-color);
            cursor: pointer;
            transition: all 0.2s;
        }
        .unit-example:hover {
            background-color: rgba(58, 134, 255, 0.2);
            transform: translateY(-2px);
        }
        .application-card {
            border-radius: 8px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: transform 0.3s;
            margin-bottom: 1.5rem;
        }
        .application-card:hover {
            transform: translateY(-5px);
        }
        .application-header {
            background-color: var(--primary-color);
            color: white;
            padding: 1rem;
            font-weight: 600;
        }
        .application-content {
            padding: 1.5rem;
        }
        .nav-tabs .nav-tabs .tab-content {
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            border-top: none;
            border-radius: 0 0 6px 6px;
        }
        .molar-mass-input {
            display: none;
        }
        @media (max-width: 768px) {
            .conversion-controls {
                flex-direction: column;
            }
            .conversion-unit {
                width: 100%;
            }
        }.reference-block {
    border-left: 4px solid #2c7da0;
    background: #f0f9ff;
    padding: 1rem;
    margin: 1.5rem 0;
    border-radius: 0 12px 12px 0;
}