Faced with the problem of centering the block, with dynamic width. Picture as it should be:
It .description not go to center the block .description with width:auto; and position:absolute; , here is an example code - http://jsfiddle.net/y2vqtzvg/

position:absolute;in conjunction withtop: 100pxput it in the center if the text will be two lines (as in fiddle) jsfiddle.net/y2vqtzvg/2 - Cheslabwidthbe more than 100%, for example 120%, and negativeleftjsfiddle.net/y2vqtzvg/3 - Cheslabauto( - Neka