#capa {
position: fixed; 
top: -10vh; left: 0; 
height: 120vh; 
width: 100vw; 
pointer-events: none; 
}
#capa .nieve { 
position: absolute; 
top: 0; left: 0; 
width: 2.2vmin; height: 2.2vmin; 
background: radial-gradient(circle, LightBlue 40%, transparent 75%); 
}