@media screen and (max-width: 750px) {
.container { 
	max-width: 750px;
	margin: auto;
	display: grid;
	grid-row-gap: 5px;
}
	
.header {
	margin-bottom: -5px;
	grid-column: 1 / -1;
	grid-row: 1 / 2;
	display: none;
}
.header-mobile {
	margin-bottom: -5px;
	grid-column: 1 / -1;
	grid-row: 1 / 2;
	display: block;
}
nav {
	grid-column: 1 / -1;
	grid-row: 2 / 3;
}	
.titlebar {
	grid-column: 1 / -1;
	grid-row: 3 / 4;
	margin: 0 2%;
}
.previousnext {
	grid-column: 1 / -1;
	grid-row: 4 / 5;
	margin: 0 0 10px 2%;
	text-align: left;
}
.thickbluerule {
	grid-column: 1 / -1;
	grid-row: 5 / 6;
	margin-top: 0;
}
.image-showcase {
	grid-column: 1 / -1;
	margin: 20px 2% 0 2%;
	grid-row: 6 / 7;
}
.box-maincontent {
	grid-column: 1 / -1;
	margin: 0 3%;
	grid-row: 7 / 8;
}				
.footer {
	grid-column: 1 / -1;
	grid-row: 8 / 9;
}
}


@media screen and (min-width: 751px) {
.container { 
	max-width: 1200px;
	margin: auto;
	display: grid;
	grid-row-gap: 5px;
	grid-template-columns: 1fr 1fr;
}
	
.header {
	margin-bottom: -5px;
	grid-column: 1 / -1;
	grid-row: 1 / 2;
	display: block;
}
.header-mobile {
	margin-bottom: -5px;
	grid-column: 1 / -1;
	grid-row: 1 / 2;
	display: none;
}
nav {
	grid-column: 1 / -1;
	grid-row: 2 / 3;
}	
.titlebar {
	grid-column: 1 / 2;
	margin: 0 3%;
	margin-top: 10px;
}
.previousnext {
	grid-column: 2 / -1;
	margin: 20px 3% 0 0;
	text-align: right;
}
.thickbluerule {
	grid-column: 1 / -1;
	grid-row: 4 / 5;
	margin-top: 0;
}
.image-showcase {
	grid-column: 1 / -1;
	margin: 20px 2% 0 2%;
	grid-row: 5 / 6;
}
.box-maincontent {
	grid-column: 1 / -1;
	margin: 0 2%;
	grid-row: 6 / 7;
}				
.footer {
	grid-column: 1 / -1;
	grid-row: 7 / 8;
}
}