Find
.main-content .main-item {
padding-right: 35em;
padding-left: 3.75em;
}
and
.main-content .main-item ul {
width: 34em;
right: -35em;
margin-left: -34em;
}
Edit to preserve equality:
.main-content .main-item -> padding-righ == - .main-content .main-item ul -> right