.horse-membership-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-section {
    margin-bottom: 20px;
}

.hidden-radio {
    display: none;
}

.button-interval, .button-amount {
    display: inline-block;
    padding: 10px 20px;
    margin: 5px;
    border: 1px solid #ccc;
    background-color: #f9f9f9;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s;
    text-align: center;
    width: 100px;
}

.button-interval:hover, .button-amount:hover {
    background-color: #ddd;
}

.is-selected {
    background-color: #0073aa;
    color: white;
}

.amount-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.interval-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.custom-amount-field {
    width: 100%;
    padding: 10px;
    margin-top: 10px;
}

.submit-button {
    padding: 10px 20px;
    background-color: #0073aa;
    color: white;
    border: none;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.submit-button:hover {
    background-color: #005a87;
}

/* Responsive Design */
@media (max-width: 768px) {
    .amount-buttons {
        grid-template-columns: repeat(2, 1fr);
    }

    .interval-buttons {
        grid-template-columns: repeat(3, 1fr);
    }
}