Templates Nav/styles.css

.template-page {
	display: grid; 
	grid-template-columns: 260px 1fr; 
	align-items: start; 
	column-gap: .5rem;
}

.templates-nav {
	max-height: calc(100vh - 120px); 
	overflow-y: auto; 
	position: sticky; 
	top: 110px; 
	padding-top: .5rem;
}

@media only screen and (max-width: 999px) {
	.templates-nav {
		display: none;
	}
	
	.template-page-content {
		grid-column: 1 / -1;
	}
}