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

body{

background:#222;

display:flex;

justify-content:center;

align-items:center;

height:100vh;

overflow:hidden;

font-family:Arial, Helvetica, sans-serif;

}

#gameContainer{

border:5px solid white;

}

canvas{

background:#4caf50;

display:block;

image-rendering:pixelated;

}