Hi there,
after you import the Split site go to Customizer > Layout > Header and enable the Navigation as Header
Then in Customizer > Additional CSS remove these blocks of CSS:
.inside-header {
display: -webkit-box;
display: -ms-flexbox;
display: flex;
-webkit-box-align: center;
-ms-flex-align: center;
align-items: center;
}
.header-widget {
order: 10;
overflow: visible;
}
.nav-float-right .header-widget {
top: auto;
}
.nav-float-right .header-widget .widget {
padding-bottom: 0;
}
.site-branding,
.site-logo {
position: absolute;
left: 50%;
-webkit-transform: translateX(-50%);
transform: translateX(-50%);
z-index: 200;
}
/* and this */
#mobile-header .mobile-bar-items {
-webkit-box-ordinal-group: 5;
-ms-flex-order: 4;
order: 4;
margin-left: auto;
}
/* and tjos */
#site-navigation {
float: none;
width: 100%;
}
.main-navigation:not(.slideout-navigation):not(.mobile-header-navigation) .main-nav > ul {
display: -webkit-box;
display: -ms-flexbox;
display: flex;
}
.main-navigation .menu-item-separator {
-webkit-box-flex: 1;
-ms-flex-positive: 1;
flex-grow: 1;
}
.main-navigation .menu-item-separator a {
font-size: 0;
background: transparent !important;
}
.slideout-navigation .menu-item-separator,
.main-navigation.toggled .menu-item-separator{
display: none !important;
}
@media (max-width: 768px) {
.inside-header>:not(:last-child):not(.main-navigation) {
margin-bottom: 0;
}
}