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

html,body{
    width:100%;
    height:100%;
    overflow:hidden;
    background:#001b44;
    font-family:Arial, Helvetica, sans-serif;
}

#game{
    width:100vw;
    height:100vh;
    display:block;

    background:
    radial-gradient(circle at top,#4fc3ff 0%,#0b4c8c 35%,#012340 75%,#001122 100%);
}