.required {
    color: #dc3545;
    margin-left: 2px;
}

.field-mapping-item label,
.variable-mapping-item label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

button[type="submit"]:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background-color: #ccc;
}

button[type="submit"]:disabled:hover {
    background-color: #ccc;
}