If you want to rotate an element by 90 Degrees (or indeed a different degree of your choosing) then apply the following class to the element/div:-

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.rotate-90 {
filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=1);
-webkit-transform: rotate(90deg);
-moz-transform: rotate(90deg);
-ms-transform: rotate(90deg);
-o-transform: rotate(90deg);
transform: rotate(90deg);
}
view raw Rotate 90 Degrees CSS hosted with ❤ by GitHub

Here we should be covering CSS Rotation in all browsers.

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How to Rotate more or less than 90 Degrees in CSS

Really easy, just replace the '90deg' 's above to a degree rotation of your choosing

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