Responsive square images
Responsive 3x3 grid of square images. 3 Columns and 3 rows.
HTML
<!-- 1st row */ -->
<div></div>
<div></div>
<div></div>
<!-- 2nd row */ -->
<div></div>
<div></div>
<div></div>
<!-- 3rd row */ -->
<div></div>
<div></div>
<div></div>
CSS
div {
float:left;
width: 30%;
padding-bottom: 30%; /* = width for a 1:1 aspect ratio */
margin:1.66%;
background-color: #1E1E1E;
}