body {
   margin: 0;
   overflow: hidden;
   background: black;
   display: flex;
   justify-content: center;
   align-items: center;
}

#verticalButtons {
   display: flex;
   flex-direction: column;
}

button {
   border: none;
   border-radius: 5px;
   padding: 5px 5px 7px 5px;
   margin: 2px;
   cursor: pointer;
}

button:hover {
   background: blue;
}

#network-canvas {
   background: black;
}

#car-canvas {
   background: lightgray;
}