body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: black;
  color: white;
  font-family: Verdana;
  }
  
  a:link {
    color: cyan;
    text-decoration: none;
  }

  a:visited {
    color: blue;
   text-decoration: none;
  }

  a:hover {
    color: magenta;
    text-decoration: underline;
  }

  a:active {
   color: steelblue;
   text-decoration: underline;
  }

main {
  flex-grow: 1;
}