body {
    background: #0a0a0f;
    margin: 0;
    overflow: hidden;
}

#app {
    width: 100vw;
    height: calc(100vh - 48px);
}

@media (max-width: 768px) {
    #app { height: calc(100vh - 40px); }
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: crosshair;
}