Entendiendo Transformaciones
.enviar{
width: 40%;
padding: 15px 0;
font-size: 18px;
font-weight: bold;
color: white;
background: orange;
border: none;
border-radius: 5px;
transition: 1s all;
cursor: pointer;
}
.enviar:hover{
background: darkorange;
transform: scale(1.2);
}