body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100vh;
}

img.displayed {
  max-width: 100%;
  height: auto;
}

@media (max-width: 600px) {
  h1 { font-size: 1.5em; }
  h2 { font-size: 1.2em; }
  p { font-size: 1em; }
}