.wrapper {

	margin-left: auto;

	margin-right: auto;

	width: 400px;

}






#demo

{

    text-align:center;

    padding:20px;

    }

    

    #demo a

    {

        display:inline-block;

        padding:10px;

        margin:10px;

        background-color:Gray;

        color:Black;

        text-decoration:none;

        }

        #demo a:hover

        {

            background-color:#cccccc;

            }