.amount-buttons {
    display: flex;
    justify-content: space-between;
    gap: 5px;
}
.preset-amount {
    flex: 1;
    padding: 10px;
    background-color: #0073aa;
    color: white;
    border: none;
    cursor: pointer;
}
input, button {
    width: 100%;
    padding: 10px;
    margin: 5px 0;
}