Also for high resolution screens.

Source: Mike Temby at https://www.facebook.com/groups/DiviThemeUsers/posts/4860359850760239/

/* Boxed layout beyond 1920px */
#page-container {
max-width: 1920px;
}
@media all and (min-width: 1921px) {
#page-container {
margin-left: auto;
margin-right: auto;
box-shadow: 0 0 28px 1px rgba(0,0,0,.1);
}
}Code language: CSS (css)

Alternative

(not tested and sizes need to be changed)

@media (min-width: 1201px) {
#page-container,
#top-header,
#main-header {
max-width: 1599px;
margin: 0 auto;
}
#page-container {
box-shadow: 0 0 10px 0 rgba(0,0,0,.2);
}
}Code language: CSS (css)