body {
  background-color: black;
  color: lime;
  font-family: "Comic Sans MS", "Courier New", monospace;
  text-align: center;
  background-image: url("stars.gif");
  margin: 0;
  padding: 1em;
}

ul {
  list-style: none;
  padding: 0.75em;
  border: 0.4em ridge silver;
  width: 90%;
  max-width: 14em;
  margin: 1.25em auto;
  box-sizing: border-box;
}

img {
  border: 0.4em ridge silver;
  max-width: 100%;
  height: auto;
  box-sizing: border-box;
}

a { color: yellow; }

@media (max-width: 600px) {
  h1 {
    font-size: 24px;
  }
  img {
    max-width: 60%;
  }
}