Hi there,
try this:
@media (max-width: 768px) {
.offside--left.is-open,
.offside-js--is-left .offside-sliding-element {
-webkit-transform: translate3d(80vw, 0, 0);
-moz-transform: translate3d(80vw, 0, 0);
-ms-transform: translate3d(80vw, 0, 0);
-o-transform: translate3d(80vw, 0, 0);
transform: translate3d(80vw, 0, 0);
}
.offside--right.is-open,
.offside-js--is-right .offside-sliding-element {
-webkit-transform: translate3d(-80vw, 0, 0);
-moz-transform: translate3d(-80vw, 0, 0);
-ms-transform: translate3d(-80vw, 0, 0);
-o-transform: translate3d(-80vw, 0, 0);
transform: translate3d(-80vw, 0, 0);
}
.main-navigation.offside {
width: 80vw;
}
.offside--left {
left: -80vw;
}
.offside--right {
right: -80vw;
}
.offside-js--is-right.slide-opened .slideout-overlay button.slideout-exit {
right: auto !important;
}
.offside-js--is-left.slide-opened .slideout-overlay button.slideout-exit {
left: auto !important;
}
}