html, body {
  overflow: hidden;
  padding: 0;
  margin: 0;
}
.container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  display: flex;
  flex-direction: column-reverse;
  align-items: start;
}
.clean-btn {
  z-index: 1;
  font-family: sans-serif;
  font-size: 15px;
  color: white;
  text-shadow: 0 0 10px #000000;
  user-select: none;
  padding: 0 0 15px 25px;
  cursor: pointer;
  text-decoration: underline;
  opacity: .5;
}
canvas {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
}

.name {
  position: fixed;
  top: 50%;
  left: 50%;
  width: 100%;
  transform: translate(-50%, -50%);
  color: white;
  text-align: center;
  font-size: 4vw;
  text-shadow: 0 0 5px #000000;
  user-select: none;
  pointer-events: none;
}

@media all and (min-width: 640px) {
  .name {
      font-size: 45px
  }
}