body {
  text-align: center;
  margin: 0;
  padding: 0;
  font-size: 2em;
  background: #121127;
  color: #fff;

  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

button {
  color: #fff;
  background-color: #222147;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 1em;
  font-weight: 600;
  padding: 0.25em 2em;
  margin-top: 0.5em;
}

h1 {
  margin: 0;
  padding: 0;
  transition: all 0.25s ease;

  animation: show 500ms 100ms cubic-bezier(0.38, 0.97, 0.56, 0.76) forwards;
  max-height: 0;
  overflow: hidden;
}

#container {
  height: 15em;
  display: flex;
  flex-direction: column;
  justify-content: end;
}

@keyframes show {
  100% {
    max-height: 5rem;
  }
}

h1:nth-last-of-type(1) { opacity: 100%; }
h1:nth-last-of-type(2) { opacity: 70%; }
h1:nth-last-of-type(3) { opacity: 50%; }
h1:nth-last-of-type(4) { opacity: 30%; }
h1:nth-last-of-type(5) { opacity: 10%; }
h1:nth-last-of-type(n+6) { opacity: 0; }

@media only screen and (max-width: 768px) {
  body {
    font-size: 1rem;
  }
  button {
    font-size: 1rem;
  }
}