#map-view {
    position: absolute;
    top: 72px;
    left: 32px;
    right: 32px;
    bottom: 32px;
    background-color: black;
}

#map-view canvas {
    width: 100%;
    height: 100%;
}

#map-view:-webkit-full-screen {
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
}

#debug-panel {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 256px;
    background-color: rgba(0, 0, 0, 0.25);
    color: white;
    font-family: sans-serif;
    padding: 8px;
}

#debug-panel .debug-label {
    display: inline-block;
    width: 144px;
    padding-right: 8px;
    text-align: right;
    color: #cccccc;
}

body {
    background-color: #000;
    color: #fff;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

#map-view {
    position: absolute;
    top: 72px;
    left: 32px;
    right: 32px;
    bottom: 32px;
    background-color: black;
}

#map-view canvas {
    width: 100%;
    height: 100%;
}

#map-view:-webkit-full-screen {
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
}

#debug-panel {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 256px;
    background-color: rgba(0, 0, 0, 0.25);
    color: white;
    font-family: sans-serif;
    padding: 8px;
}

#debug-panel .debug-label {
    display: inline-block;
    width: 144px;
    padding-right: 8px;
    text-align: right;
    color: #cccccc;
}

Make background dark & use sans-serif font
Make background dark & use sans-serif font