body {
  background-color: #004d4d;
  color: white;
  font-family: Verdana;
  max-width: 650px;
  margin:  12% auto auto auto;
}

@media (max-width:875px) and (min-width:325px) {
  body {
    width: calc(100% - ((100% - 325px) * 0.466));
  }
}

footer {
  position: fixed;
  bottom: 5px;
  width: 40%;
}

footer>img {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 120px;
}