#main-logo {
  height: 90px;
  width: 433px;
  background-image: url("/forums/images/sttg.png");
}

@media (max-width: 300px) and (min-width: 1px) {
  #main-logo {
    display: block;
    margin-left: auto;
    margin-right: auto;
    height: 62px;
    width: 300px;
    background-image: url("/forums/images/sttg-300.png");
  }
}

@media (max-width: 320px) and (min-width: 301px) {
  #main-logo {
    display: block;
    margin-left: auto;
    margin-right: auto;
    height: 67px;
    width: 320px;
    background-image: url("/forums/images/sttg-320.png");
  }
}

@media (max-width: 430px) and (min-width: 321px) {
  #main-logo {
    display: block;
    margin-left: auto;
    margin-right: auto;
    height: 73px;
    width: 350px;
    background-image: url("/forums/images/sttg-350.png");
  }
}

@media (max-width: 700px) and (min-width: 431px) {
  #main-logo {
    display: block;
    margin-left: auto;
    margin-right: auto;
    height: 90px;
    width: 433px;
    background-image: url("/forums/images/sttg.png");
  }
}