style.css

* {
  margin: 0;
  padding: 0 -webkit-touch-callout: none;
  /* iOS Safari */
  -webkit-user-select: none;
  /* Safari */
  -khtml-user-select: none;
  /* Konqueror HTML */
  -moz-user-select: none;
  /* Old versions of Firefox */
  -ms-user-select: none;
  /* Internet Explorer/Edge */
  user-select: none;
}

body {
  height: 100vh;
  width: 100vw;
  background: black;
}

div.button {
  padding: 20px;
  pointer-events: all;
}

div.button-wrapper {
  position: fixed;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  width: 100vw;

  z-index: 2;
  pointer-events: none;
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);

  cursor: pointer;
}

div.button span {
  color: white;
  font-size: 40vw;
  font-weight: 100;
  font-family: -apple-system, "HelveticaNeue-ExtraLight", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Roboto, sans-serif;
  text-transform: uppercase;
}

.hide {
  opacity: 0;
  cursor: default !important;
  backdrop-filter: blur(0);
  transition: opacity 2.5s ease-in;
}