Hi,
You just need to add margin-top: 15px;
line
into the code above,
so your code will look like this:
body.home.page #masthead .pull-left a {
background: url(https://teste1.alibi.pt/wp-content/uploads/2017/09/A-1.png);
background-repeat: no-repeat;
background-size: auto 80%;
margin-top: 15px;
}
change the margin-top value per your wish.
Regards