html, body {
  height: 100%;
  margin: 0;
  background: black;
}

body {
  background: url('background.jpg') center / cover no-repeat fixed;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: Arial, Helvetica, sans-serif;
}

.overlay {
  background: rgba(0, 0, 0, 0.6);
  padding: 2rem 1.5rem;
  border-radius: 8px;
  width: 90%;
  max-width: 38rem;
}

.overlay h1 {
  margin-bottom: 1rem;
  font-size: 2.5rem;
}

.overlay h1, h2 {
  text-align: center;
}

.overlay h2 {
  font-weight: normal;
}

.overlay h2 span {
  font-weight: bold;
  font-size: 1.7rem;
}

.container {
  max-width: 30rem;
  margin: auto;
}

.overlay p {
  margin: auto;
  line-height: 1.5;
}

.cta {
  margin-top: 1em;
  margin-bottom: 1em;
  text-align: center;
}

.cta a {
  display: inline-block;
  background: #ff6600;
  color: #fff;
  padding: .5rem .75rem;
  border-radius: 4px;
  text-decoration: none;
  font-weight: bold;
  transition: background .3s;
}

.cta a:hover,
.cta a:focus {
  background: #e65c00;
}

@media (max-width: 480px) {
  .overlay {
    padding: 1.5rem 1rem;
  }

  .cta a {
    padding: .5rem .75rem;
  }
}