html, body {
    height: 100%;
    margin: 0;
    background-color: #2b2b2b;
}
#map {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    height: 100%;
    width: 100%;
    z-index: 1;
}
header {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 999;
    background-color: rgba(43, 43, 43, 0.8);
    text-align: center;
    pointer-events: auto;
    padding: 10px 0;
}
header .logo {
    max-height: 50px;
    max-width: 30%;
    margin: 0 10px;
    display: inline-block;
}
.controls {
    position: absolute;
    bottom: 10px; /* checkbox blijft onderaan */
    left: 10px;
    z-index: 999;
    background: rgba(0,0,0,0.5);
    padding: 6px 10px;
    border-radius: 6px;
    color: white;
    font-family: verdana;
    font-size: 14px;
    width: auto;
    display: flex;
    align-items: center;
    pointer-events: auto;
}
input {
    margin-left: 10px;
}
.leaflet-top.leaflet-left {
    top: 70px; /* zoom knoppen onder header */
}