index.css

:root {
    --jungle-color-blue: #0267b1;
    --jungle-color-orange: #fbb81d;
}

body {
    margin: 0;
    padding: 0;
}

main {
    height: 100vh;
}

#map {
    width: 100%;
    height: 100%;
}

.logo {
    margin-left: auto;
    margin-right: auto;
    display: block;
}

header, footer {
    height: 60px;
    background-color: var(--jungle-color-blue);
    color:var(--jungle-color-orange);
}

.map-overlay {
    font: 14px/20px 'Helvetica Neue', Arial, Helvetica, sans-serif;
    position: absolute;
    background-color: #fff;
    z-index: 12;
    top: 0;
    left: 0;
    padding: 10px;
    opacity: 0.95;
    box-sizing: border-box;
    border-bottom-left-radius: 15px;
    border-bottom-right-radius: 15px;
    display: none;
    max-width: 25%;
    max-height: calc(100vh - 120px);
    overflow: auto;
}

@media screen and (max-width: 480px) {
    .map-overlay {
        width: 100%;
        max-height: 45%;
        overflow: auto;
    }
}

#close_caisson_button {
    position: absolute;
    height: 36px;
    width: 36px;
    right: 5px;
    cursor: pointer;
    background: var(--jungle-color-orange);
    border-radius: 18px;
    text-align: center;
    line-height: 36px;
    color: #FFF;
    font-weight: bold;
}

.jungle-logo {
    position: absolute;
    z-index: 12;
    bottom: 12px;
    right: 0;
    padding: 10px;
    opacity: 0.95;
    box-sizing: border-box;
    border-bottom-left-radius: 15px;
    border-bottom-right-radius: 15px;
}