WraysConsultingLLC Hi
Try change this :
@media only screen and (max-width:845px) {.box .gkPage {max-width: 100%;}}
to
@media only screen and (max-width:845px) {.box .gkPage {max-width: 100% !important;}}
which will ensure that specific CSS declaration supersedes the other property in effect henceforth getting the results as envisaged
Kindly ensure to clear your browser cache if changes dont reflect