body {
  background: #101010;
}

.top {
  height: 100vh;
  background: #101010;
  text-align: center;
  font-family: sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
}

.bottom {
  height: 100vh;
  background: #101010;
  text-align: center;
  font-family: sans-serif;
  font-size: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  border-top: 1px solid rgba(255, 255, 255, 0.4);
}

span {
  display: inline-block;
  font-family: sans-serif;
  background: #101010;
  padding: 0 4px;
  color: #fff;
  position: relative;
  top: -10px;
}

.canvas-container {
  height: 10000px;
  background: #101010;
  width: 100%;
  position: relative;
}

.bg-container {
  margin: 0 auto;
  height: 100%;
  position: absolute;
  width: 100%;
}

.sticky-pos {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  width: 100%;
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  height: 100vh;
}

#canvas {
  position: relative;
  width: auto;
  height: auto;
  max-width: 700px;
  border: 1px dashed rgba(255, 255, 255, 0.4);
}