html,
body {
  height: 100%;
}

body {
  display: -ms-flexbox;
  display: flex;
  -ms-flex-align: center;
  align-items: center;
  padding-top: 40px;
  padding-bottom: 40px;
  background-color: #23272A;

  margin: 0;
}

.content {
  width: 100%;
  max-width: 420px;
  padding: 15px;
  margin: auto;
}

#particles-js > canvas {
  display: block;
  vertical-align: bottom;
}

#particles-js {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: -1;
  /*background-image: url("");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: 50% 50%;*/
}

#content {
  z-index: 1;
}

#fortune-btn {
  width: 100%;
  max-width: 20rem;
}