.wp-block-button__link {
    background-color: #00aaff;
    color: #fff;
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 4px;
}
.wp-block-button__link:hover {
    background-color: #0088cc;
}
.wp-block-group h1, .wp-block-group h2, .wp-block-group h3 {
    margin-bottom: 16px;
}
.wp-block-group p {
    margin-bottom: 12px;
}