style.css

* {
  margin: 0;
  overflow: hidden;
}
body {
  background-color: black;
  color: white;
  font-family: sans-serif;
}
.text-center {
  display: none;
}
.status {
  margin: 20px;
  transform: scale(1.5);
}
#container {
  z-index: 10;
}
canvas {
  border: 1px solid black;
}
div {
  padding: 10px;
}
.invisible {
  z-index: 1;
  display: none;
}
.text-center {
  text-align: center;
}

.center-block {
  display: block;
  margin: auto !important;
  text-align: center;
  align-items: center;
}
.label {
  padding-right: 10px;
  width: 25%;
  vertical-align: top;
  font: 16px "Lucida Grande", sans-serif;
}
#output-text {
  margin-top: 10px;
  font-size: 2em;
}
#title {
  font-size: 2em;
}
#particles-js canvas {
  display: block;
  vertical-align: bottom;
}

#particles-js {
  z-index: -1;
  position: absolute;
  width: 100%;
  height: 100%;
  background: #000;
}