#map {
    height: 100%;
    width: 100%;
    padding: 5px;
}
#legend {
    font-family: Arial, sans-serif;
    background: #fff;
    padding: 10px;
    margin: 10px;
    border: 3px solid #000;
}

    #legend h3 {
        margin-top: 0;
    }

    #legend img {
        vertical-align: middle;
    }