html {
  min-width: 320px;
}
@media only screen and (max-width: 375px) {
  .home-links .picture { display: none; }
}
@media only screen and (max-width: 769px) {
  header .well, main .well {
    margin-left: 5%;
    margin-right: 5%;
    width: 90%;
  }
}
@media only screen and (min-width: 770px) {
  .banner {
    margin-bottom: 2.5%;
    margin-left: auto;
    margin-right: auto;
    width: 80%;
  }
}