Try this CSS:
@media(min-width: 769px) {
.navigation-branding {
position: absolute;
top: 0;
left: 50%;
transform: translateX(-50%);
margin-left: 0;
}
.main-navigation:not(.slideout-navigation) .main-nav {
flex: 1;
}
.main-navigation:not(.slideout-navigation) .main-nav > ul {
display: flex;
}
.main-navigation:not(.slideout-navigation) .main-nav > ul > li:nth-child(4) {
margin-left: auto;
}
}
In the CSS you will see this: nth-child(4)
The 4
decides which Menu items sit to the right. Change this number to where you want the spacing to appear.