body {
    margin: 0;
    overflow: hidden;
}

.node image {
    cursor: pointer;
}

@media screen and (max-width: 768px) {
    .canvas {
        width: 500px;
        height: 500px;
    }
}

@media screen and (min-width: 769px) {
    .canvas {
        width: 700px;
        height: 500px;
    }
}

@media screen and (min-width: 1024px) {
    .canvas {
        width: 850px;
        height: 500px;
    }
}