body {
  margin: 0;
  overflow: hidden;
  background-image: url("stamp.jpg");
  background-size: cover;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.container {
  text-align: center;
}

#welcome-message {
  font-size: 4em;
  color: #222;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.comment {
  font-size: 1.2em;
  color: #777;
  margin-top: 10px;
}