.particle-container #particles-js {
    top: 0;
    position: absolute;
    z-index: 1;
}
#particles-js {
    width: 100%;
    height: 100%;
    background-color: transparent;
    background-image: url('');
    background-size: cover;
    background-position: 50% 50%;
    background-repeat: no-repeat;
}