body {
   background-color: black;
   color: white;
}

button {
   background-color: black;
   color: white;
   border: 3px solid white;
}

button:hover {
   background-color: white;
   color: black;
   border: 3px solid black;
}

button:active {
   background-color: white;
   color: white;
   border: 3px solid white;
}

a {
   text-size: 50px;
}