.quantity-selector {
    display: flex;
    align-items: center;
}

.quantity-selector button {
    background-color: #f0f0f0;
    border: 1px solid #ccc;
    padding: 10px;
    font-size: 16px;
}

.quantity-selector #quantity {
    margin: 0 10px;
    font-size: 18px;
}