.converter { width: 300px; margin: 0 auto;	font-size: 18 px; text-align: center;}.bigger {	font-size: 18px;}.input-group { margin-bottom: 10px;}label { display: block;}input { width: 100%; height: 30px; padding: 5px;}button { width: 100%; height: 40px; background-color: lightblue; font-size: 18px; cursor: pointer;}.lightgrey { background-color: lightgrey;}