.circles {
    overflow: hiddden;
    position: fixed;
    top: 0;
    right: 0;
    z-index: 0;
    opacity: 0.6;
}

.circles canvas {
    position: fixed;
    top: 0;
    right: 0;
}

@media screen and (min-width: 1280px) {
    .circles {
        opacity: 0.8;
    }
}