body{overflow-x: hidden; }
.link_bianco a {color:#fff !important; font-weight:bold;}
.ball {
width: 50px;
height: 50px;
position: fixed;
top: 0;
left: 0;
border: 2px solid #ddd;
border-radius: 50%;
pointer-events: none;
transition: transform 0.3s ease;
transform-origin: center center;
z-index:1000;
}
.grow {
mix-blend-mode: difference; 
}  @media only screen and (max-width: 767px) {
.ball, .logo_big {
display:none;
}
}