html,
body {
    overflow: hidden;
    margin: 0;
}
canvas,
main {
    position: absolute;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    word-break: break-word;
    user-select: none;
    touch-action: none;
}
[hidden] {
    display: none;
}
[onclick] {
    cursor: pointer;
}
.grabbing {
    cursor: grabbing;
}