body {
  margin: 0;
  padding: 0;
  text-align: center;
  font-family: sans-serif;
  background-color: #fff;
}

.container {
  max-width: 100%;
  padding: 20px;
  box-sizing: border-box;
}

.background-image {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

@media (max-width: 600px) {
  .background-image {
    width: 100vw;
    max-width: none;
  }

  .container {
    padding: 0;
  }
}