.parent {

    position: fixed;

    margin: auto;

    left: 0;

    top:0;

    width: 200px;

    height: 200px;

    line-height: 200px;

    text-align: center;

 }

​

.child {

    display: inline-block;

    position: relative;

    padding: 10px 25px;

​

    background-color: #4CC713;

    color: white;

​

    font-family: sans-serif;

    text-decoration: none;

    font-size: 0.9em;

    text-align: center;

    text-indent: 15px;

    line-height: 100%;

}