Responsive Full Width Grid

A layout for a full width flexible grid layout for images or other content. The items have a percentage width and some example media queries show how to adjust the items shown per row.

The HTML

<ul class="cbp-rfgrid">
	<li><a href="#"><img src="images/cat.jpg" /><div><h3>Felis catus</h3></div></a></li>
	<li><a href="#"><img src="images/cat.jpg" /><div><h3>Felis catus</h3></div></a></li>
	<li><a href="#"><img src="images/cat.jpg" /><div><h3>Felis catus</h3></div></a></li>
	<li><a href="#"><img src="images/cat.jpg" /><div><h3>Felis catus</h3></div></a></li>
	<li><a href="#"><img src="images/cat.jpg" /><div><h3>Felis catus</h3></div></a></li>
	<li><a href="#"><img src="images/cat.jpg" /><div><h3>Felis catus</h3></div></a></li>
	<li><a href="#"><img src="images/cat.jpg" /><div><h3>Felis catus</h3></div></a></li>
	<li><a href="#"><img src="images/cat.jpg" /><div><h3>Felis catus</h3></div></a></li>
	<!-- ... -->
</ul>

The CSS

.cbp-rfgrid {
	margin: 35px 0 0 0;
	padding: 0;
	list-style: none;
	position: relative;
	width: 100%;
}

.cbp-rfgrid li {
	position: relative;
	float: left;
	overflow: hidden;
	width: 16.6666667%; /* Fallback */
	width: -webkit-calc(100% / 6);
	width: calc(100% / 6);
}

.cbp-rfgrid li a,
.cbp-rfgrid li a img {
	display: block;
	width: 100%;
	cursor: pointer;
}

.cbp-rfgrid li a img {
	max-width: 100%;
}

/* Flexbox is used for centering the heading */
.cbp-rfgrid li a div {
	position: absolute;
	left: 20px;
	top: 20px;
	right: 20px;
	bottom: 20px;
	background: rgba(71,163,218,0.2);
	display: -webkit-flex;
	display: -moz-flex;
	display: -ms-flex;
	display: flex;
	-webkit-align-items: center;
	-moz-align-items: center;
	-ms-align-items: center;
    align-items: center;
    text-align: center;
    opacity: 0;
}

.cbp-rfgrid li a:hover div {
	opacity: 1;
}

.cbp-rfgrid li a div h3 {
	width: 100%;
	color: #fff;
	text-transform: uppercase;
	font-size: 1.4em;
	letter-spacing: 2px;
	padding: 0 10px;
}

/* Example for media query: change number of items per row */

@media screen and (max-width: 1190px) {
	.cbp-rfgrid li {
		width: 20%; /* Fallback */
		width: -webkit-calc(100% / 5);
		width: calc(100% / 5);
	}
}

@media screen and (max-width: 945px) {
	.cbp-rfgrid li {
		width: 25%; /* Fallback */
		width: -webkit-calc(100% / 4);
		width: calc(100% / 4);
	}
}

@media screen and (max-width: 660px) {
	.cbp-rfgrid li {
		width: 33.3333333%; /* Fallback */
		width: -webkit-calc(100% / 3);
		width: calc(100% / 3);
	}
}

@media screen and (max-width: 660px) {
	.cbp-rfgrid li {
		width: 33.3333333%; /* Fallback */
		width: -webkit-calc(100% / 3);
		width: calc(100% / 3);
	}
}

@media screen and (max-width: 400px) {
	.cbp-rfgrid li {
		width: 50%; /* Fallback */
		width: -webkit-calc(100% / 2);
		width: calc(100% / 2);
	}
}

@media screen and (max-width: 300px) {
	.cbp-rfgrid li {
		width: 100%;
	}
}