html,
body {
    margin: 0;
    padding: 0;
    color: rgba(255, 255, 255, 0.87);
    background-color: #000000;
    /* The board is panned/zoomed via pixi-viewport's own drag & pinch
     * plugins; without this, mobile browsers intercept one/two-finger
     * gestures on the canvas for native page pan/pinch-zoom/pull-to-refresh
     * before pixi-viewport ever sees them. */
    touch-action: none;
    overscroll-behavior: none;
}

#app {
    width: 100%;
    height: 100vh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    touch-action: none;
    overscroll-behavior: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
    user-select: none;
}