.result-unit {
            font-size: 1rem;
            color: #2c3e50;
        }
        .ions-table-wrapper {
            background: #f8fafc;
            border-radius: 20px;
            padding: 1.2rem;
            margin: 1rem 0;
        }
        .ion-row {
            margin-bottom: 0.75rem;
            align-items: center;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .ion-row .ion-name { flex: 2; min-width: 100px; }
        .ion-row .ion-conc { flex: 2; min-width: 120px; }
        .ion-row .ion-charge { flex: 1.5; min-width: 100px; }
        .ion-row .ion-action { flex: 0.5; min-width: 45px; text-align: center; }
        .delete-row-icon {
            color: #dc3545;
            cursor: pointer;
            font-size: 1.2rem;
            transition: 0.1s;
        }
        .delete-row-icon:hover {
            color: #a71d2a;
            transform: scale(1.1);
        }
        .add-ion-btn {
            background: white;
            border: 2px dashed #0d6efd;
            border-radius: 60px;
            padding: 0.4rem 1.2rem;
            font-weight: 600;
            transition: 0.2s;
        }
        .add-ion-btn:hover {
            background: #e7f1ff;
            transform: translateY(-1px);
        }
        .preset-group {
            margin: 1.5rem 0;
            display: flex;
            flex-wrap: wrap;
            gap: 0.7rem;
        }
        .preset-btn {
            background: #f1f5f9;
            border: none;
            padding: 0.3rem 1rem;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: all 0.1s ease;
        }
        .preset-btn:hover {
            background: #cbd5e1;
            transform: translateY(-1px);
        }
        .info-card {
            background: #fef9e3;
            border-left: 6px solid #e67e22;
            padding: 1.2rem;
            border-radius: 16px;
            margin: 1.8rem 0;
        }
        .reference-block {
            background: #f2f4f8;
            padding: 1rem;
            border-radius: 16px;
            font-size: 0.9rem;
        }
        .key-fact {
            font-weight: 600;
            color: #2c3e50;
        }
        .warning-banner {
            background: #fff3cd;
            border-left: 5px solid #ffc107;
            padding: 0.75rem;
            border-radius: 12px;
            margin: 0.5rem 0;
        }
        .danger-banner {
            background: #f8d7da;
            border-left: 5px solid #dc3545;
            padding: 0.75rem;
            border-radius: 12px;
            margin: 0.5rem 0;
        }
        .activity-coeff-table {
            font-size: 0.9rem;
        }
        .unit-selector {
            max-width: 150px;
        }
        @media (max-width: 768px) {
            .ion-row {
                flex-direction: column;
                align-items: stretch;
                background: white;
                padding: 0.75rem;
                border-radius: 16px;
                margin-bottom: 1rem;
                box-shadow: 0 1px 2px rgba(0,0,0,0.05);
            }
            .ion-row .ion-action {
                text-align: right;
            }
        }