* {
  color: #00008B;
}

.header {
  background-color: red;
}

/*Body tag: add a 25 pixel margin, add font family Arial, Hevetica, sans-serif */

body {
  margin: 25xp;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 1em;
  text-align: center;

  background-color: white;
  background-image: url('https://i.discogs.com/Y5BWUgsaDsFYzUOqHn07lkdeTk-nc6BX9kezl1VgsXQ/rs:fit/g:sm/q:90/h:600/w:578/czM6Ly9kaXNjb2dz/LWRhdGFiYXNlLWlt/YWdlcy9SLTI0MzEz/MDg1LTE2NjE0NTA0/MzEtNTIzMy5qcGVn.jpeg');
  background-repeat: no-repeat;

}

footer {
  margin-top: 50px;
  margin-bottom: 50px;
}

img {
  border: 1px solid#000000;
  border-radius: 10px;
}

.external-link::after {
  content: '(external)';
  color: red;
}