.page > .header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
}

@media (min-width: 1101px) {
  .page > main {
    width: 90%;
    margin-left: auto;
    margin-right: auto;
  }
}

@media (min-width: 761px) and (max-width: 1100px) {
  .page {
    width: calc(100% - 36px);
  }

  .page > main {
    width: 90%;
    margin-left: auto;
    margin-right: auto;
  }
}

@media (min-width: 1101px) {
  .page {
    width: calc(100% - 70px);
  }
}