* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #0D1117;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

#gameCanvas {
    display: block;
    width: 100vw;
    height: 100vh;
    cursor: default;
}

#gameCanvas.playing {
    cursor: none;
}