@media (min-width: 320px) and (max-width: 600px) {
  .container {
    width: calc(100vw - 40px);
    margin: 0;
    padding: 20px;
    border-radius: 0;
  }
  .container > img {
    width: 100vw;
    margin: -20px;
    margin-bottom: 20px;
    border-radius: 0;
  }
}