.wp-block-button {
    transition: transform .1s ease;
}

.wp-block-button:hover {
    transform: scale(1.05);
}

.wp-block-button.size-sm {
    font-size: 12px;
    padding: 5px 10px;
}

.wp-block-button.size-md {
    font-size: 16px;
    padding: 10px 20px;
}

.wp-block-button.size-lg {
    font-size: 20px;
    padding: 15px 30px;
}