li button {
    margin-top: 1rem;
}



/* ----------------------------------------------------------------------------------------------------------------------- */
/* In the next area, styles for special page features are defined. */
main section {
    background-color: #e9f2fd;
    border-radius: 2rem;
    padding: 1rem;
    margin: 4rem 0rem 4rem 0rem;
    width: 70%;
    margin-left: auto;
    margin-right: auto;
}
main section.left_block {
    text-align: left;
    margin-left: 0;
}
main section.right_block {
    text-align: right;
    margin-right: 0;
}
main section.center_block {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}