@media screen and (min-width: 440px) {
  .main {
    margin-left: auto;
    margin-right: auto;
    width: var(--main-width-thin);
    margin-top: 4rem;
    margin-bottom: 4rem;
  }
}

@media screen and (max-width: 440px) {
  .main {
    width: 100%;
    padding: 1rem;
  }
}