body {
    height: 0;
    margin: 0;
}
html, body, #map {
    height: 100%;
    width: 100vw;
}
button.zoom i{
    font-size: 1.4rem;
}
#logo {
    display: block;
    position: absolute;
    bottom: 10px;
    left: 10px;
    z-index: 1000;
}
img.logo {
    width: 350px;
}