html, body {
margin:0;
padding:0;
width:100%;
height:100%;
overflow:hidden;
font-family:Arial;
}

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

.panel {
position:absolute;
background:rgba(0,0,0,0.75);
color:white;
padding:12px;
border-radius:8px;
width:220px;
font-size:14px;
}

.layers {
top:20px;
left:20px;
}

.panel h3 {
margin-top:0;
}