$width: 1000px !default;
$mobile-limit: 800px !default;
$very-small-limit: 480px !default;
$footer-background: #666666 !default;
$footer-color: white !default;
$top-logo-width: 0 !default;
$sidebar-width: 300px !default;
$sidebar-max-width: $sidebar-width !default;
$sidebar-min-width: 0 !default;
$sidebar-position: left !default;

html, body {
	margin: 0;
	min-height: 100vh;
}

div#page {
	display: -ms-flexbox;
	display: -webkit-flex;
	display: flex;
	box-sizing: border-box;
	min-height: 100vh;
	-ms-flex-direction: column;
	-webkit-direction: column;
	flex-direction: column;
}

div#page div#main-content-wrapper,
div#page main {
	-ms-flex: 1 0 auto;
	-webkit-flex: 1 0 auto;
	flex: 1 0 auto;
	width: 100%;
}

div#header,
div#nav,
div#footer {
	clear: both;
	max-width: $width;
	margin: 0 auto;
}

div#header {
	box-sizing: border-box;
	width: 100%;
	position: relative;
	top: 0px;
	z-index: 0;
	padding: 0 0.7em;
	& h1 {
		margin: 0;
	}
	@media screen and (max-width: $mobile-limit) {
		& h1 {
			padding-left: $top-logo-width+70px;
			background-position: 70px;
		}
	}
}

div#main-content-wrapper {
	position: relative;
	z-index: 100;
	max-width: $width;
	margin: 0px auto 0px auto;
	padding: 0;
	@media screen and (max-width: $mobile-limit) {
		position: static;
		z-index: 0;
	}
}

div#main-content {
	margin: 0;
	min-height: 300px;
}

#right {
	float: right;
	width: 50%;
}
#left {
	float: left;
	width: 50%;
}

#columns {
	box-sizing: border-box;
	-ms-flex: 1 auto;
	-webkit-flex-grow: 1;
	flex-grow: 1;
	max-width: 100%;
}

.gru-content {
	display: -ms-flexbox;
	display: -webkit-flex;
	display: flex;
	#sidebar {
		-ms-flex: 0 0 $sidebar-width;
		-webkit-flex: 0 0 $sidebar-width;
		flex: 0 0 $sidebar-width;
		max-width: $sidebar-max-width;
		@if $sidebar-min-width != 0 {
			min-width: $sidebar-min-width;
		}
		@if $sidebar-position == right {
			-ms-flex-order: 1;
			-webkit-order: 1;
			order: 1;
		}
		div.cell {
			@if $sidebar-position == left {
				margin-left: 0;
				margin-right: 20px;
			} @else {
				margin-left: 20px;
				margin-right: 0px;
			}
		}
	}
}

@media screen and (max-width: $mobile-limit) {
	#columns {
		padding: 0 0.7em;
		max-width: 100%;
	}
	#right, #left {
		float: none;
		width: auto;
	}

	.gru-content {
		-ms-flex-direction: column;
		-webkit-flex-direction: column;
		flex-direction: column;
		#sidebar {
			-ms-flex: 0 0 auto;
			-webkit-flex: 0 0 auto;
			flex: 0 0 auto;
			max-width: 100%;
			// don't apply min-width on mobile
			@if $sidebar-min-width != 0 {
				min-width: 0;
			}
			margin: 0 0.7em;
			div.cell {
				margin-left: 0;
				margin-right: 0;
			}
		}
	}
}

#footer-wrapper {
	clear: both;
	margin-top: 1.5em;
	padding: 0.7em 0 1.5em 0;
	background-color: $footer-background;
	color: $footer-color;
}

#footer {
	&::after {
		content: '';
		display: block;
		clear: both;
	}
}

h1#logo {
	padding-left: $top-logo-width;
}

@media screen and (max-width: $mobile-limit) {
	.desktop-only {
		display: none;
	}
}

@media screen and (min-width: $mobile-limit+1px) {
	.mobile-only {
		display: none;
	}
}