sub,
sup {
    font-size: 75%;

    line-height: 0;

    position: relative;
    vertical-align: baseline;
}

sup {
    top: -0.5em;
}

sub {
    bottom: -0.25em;
}

html, body{
    height: 100%;
    margin:0px;
    padding: 0px;
  }
  #particles-js{
    width: 100%;
    height: 100%;
    background: #ffff;
  }