body {
  background-color: black;
  background-image: url(shivendu-shukla-3yoTPuYR9ZY-unsplash.jpg);
  background-size: cover;
  background-repeat:   no-repeat;
}

.flex { display: flex; } 
.flex-horizontal-center { justify-content: center; }

.message {
  border-radius: 25px;
  background-color: black;
  font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
  font-size: large;
  color: #ffda90;
  font-weight: bold;
  margin: 5rem;
  padding: 2rem;
  text-align: center;
}