html { overflow: hidden; }

html, body {
     margin: 0;
     padding: 0;
     height: 100%;
}

#map {
     position: absolute;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
}

#toolbar {
     position: absolute;
     top: 20px;
     left: 100px;
     width: 400px;
     padding: 5px;
     background: white;
     border: 1px solid black;
}

#toolbar h1 {
     margin: 0;
     font: bold 18px Helvetica, sans-serif;
}