.bt{
    text-align: center;
    display: inline;
    padding: 0.5em 0;
}

.bt a{
    text-decoration: none;
    color:cadetblue;
    font-size: 25px;
}

.bt a:hover{
	background-color:#5aa99c;
    color: aliceblue;
    padding: 0.5em 0;
}