body, html, #app {
  margin: 0;
  width: 100%;
  height: 100%;

}

#app {
  overflow: hidden;
}

#app h1 {
  --fontSize: 70px;
  --lineHeight: 90px;
  width: auto;
  height: calc(2 * var(--lineHeight));
  line-height: var(--lineHeight);
  margin: calc(50vh - var(--lineHeight)) auto 0;
  text-align: center;
  color: #ffffff;
  font-family: 'Montserrat', sans-serif;
  font-size: var(--fontSize);
  text-shadow: 0 0 5px #ffffff, 0 0 20px #000, 0 0 30px #000;
}

#app canvas {
  display: block;
  position: absolute;
  z-index: -1;
  background-color:grey;
  top: 0;
}