style.scss

body {
  margin: 0;
  padding: 0;
  background: #1d1f20;
  overflow: hidden;
}
main {
  height: 100vh;
  width: 100vw;
  max-height: 100%;
  max-width: 100%;
}

.button {
  background: #2b2d2f;
  height: 80px;
  width: 200px;
  text-align: center;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  left: 0;
  right: 0;
  margin: 0 auto;
  cursor: pointer;
  border-radius: 4px;
}

.text {
  font: bold 1.25rem/1 poppins;
  color: #71dfbe;
  position: absolute;
  top: 50%;
  transform: translateY(-52%);
  left: 0;
  right: 0;
}

canvas {
  position: absolute;
  top: 0;
  left: 0;
  height: 100vh;
  width: 100vw;
}

.content {
  position: absolute;
  top: 50%;
  left: 50%;
  height: 5em;
  width: 10em;
  z-index: 0;
  opacity: 0;
  text-transform: uppercase;
  color: #fff;
  font-size: 3em;
  transform: translateY(-50%) translateX(-50%);
  text-align: center;

  img {
    position: relative;
    display: block;
    margin: 0 auto;
    margin-bottom: 1em;
  }
  h3 {
    margin-top: 0;
  }
}

.progress-bar {
  position: absolute;
  height: 0;
  width: 200px;
  right: 0;
  bottom: 0;
  left: 50%;
  border-radius: 5px;
  transform: translateX(-50%);
  background: lighten(#2b2d2f, 15%);
}

svg {
  width: 20px;
  position: absolute;
  transform: translateY(-50%) translateX(-50%);
  left: 50%;
  right: 0;
}