* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: sans-serif;
}

footer {
  /* position: absolute;
  bottom: 0; */
  position: fixed;
  bottom: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  padding: 20px 0;
  background: #333;
  color: #fff;
}
footer div,
footer a {
  color: #fff;
  text-decoration: none;
  transition: color 0.3s;
}
footer .link:hover {
  color: #4CAF50;
}