#mappa {
    height:400px;
    width:100%;
}
.gm-style-iw * {
    display: block;
    width: 100%;
}
.gm-style-iw h4, .gm-style-iw p {
    margin: 0;
    padding: 0;
}
.gm-style-iw a {
    color: #4272db;
}