body {
  cursor: wait;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  height: 100vh;
  overflow: hidden;
  font-family: Helvetica, Arial, sans-serif;
}

#button {
  cursor: pointer;
}

.vignette {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background: radial-gradient(ellipse at center, rgba(0,0,0,0) 50%, rgba(0,0,0,0.75) 100%);
  opacity: 0;
  transition: opacity 2s ease-in-out;
}