.map {
    width: 100%;
    height: 400px; 
    position: relative;
}
.map:-webkit-full-screen {
    height: 100%;
    margin: 0;
}
.map:fullscreen {
    height: 100%;
}
#infooverlay {
    position: absolute;
    display: inline-block;
    height: auto;
    width: auto;
    z-index: 100;
    background-color: #333;
    color: #fff;
    text-align: center;
    border-radius: 4px;
    padding: 5px;
    left: 50%;
    transform: translateX(3%);
    visibility: hidden;
    pointer-events: none;
    font-size: 0.8rem;
    font-family: monospace;
}