html,
body {
  height: 100%;
}
body {
  padding: 0;
  margin: 0;
  font-size: 16px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica,
    Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji;
  background-color: #333;
  color: rgba(255, 255, 255, 0.8);
  flex-direction: column;
}
main {
  text-align: center;
  max-width: 600px;
  background-color: #444;
  padding: 1rem;
  border-radius: 8px;
}
p {
  margin: 1.5rem 0 0;
}
svg {
  max-width: 400px;
}
@media (min-width: 800px) {
  body {
    font-size: 20px;
  }
  main {
    padding: 2rem;
  }
  p {
    margin: 2rem 0 0;
  }
}
.btn {
  display: block;
  background-color: #b8561f;
  color: rgba(255, 255, 255, 0.9);
  padding: 1rem 0;
  border-radius: 4px;
  transition: all 0.3s;
}
.btn:hover {
  color: white;
  background-color: #db6a20;
  text-decoration: none;
}
a {
  color: #e2a04f;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}