body{
margin:0;
overflow:hidden;
background:#020617;
color:white;
font-family:Arial;
}
#universe{
width:100vw;
height:100vh;
}
#hud{
position:fixed;
top:20px;
left:20px;
padding:15px;
border:1px solid cyan;
background:#001122cc;
border-radius:15px;
}