CSS using Compass and SaSS

custom.css

/* -------- Mobile Views 320px -------- */

$footer-width: 320px;

@function calculated-width($padding) {
	@return $footer-width - $padding;
}

.aui-view-4,
.aui-view-320 {
	#wrapper {
                @include border-radius(4px);
		margin: 20px auto 0;
		width: calculated-width(20) !important;
	}
	.portlet-layout {
		display: inline-block;
		clear: both;
		.portlet-column {
			float: left;
			clear: both;
			padding: inherit 0 !important;
			width: calculated-width(20) !important;
			.portlet-column-content {
				padding-left: 0;
				padding-right: 0;
			}
		}
	}
}