.wrapper,
.wrapper--tight,
.wrapper--wide {
  display: block;
}
.wrapper {
  max-width: 1100px;
}
.wrapper,
.wrapper--tight,
.wrapper--wide {
  padding: 1em;
}
.wrapper,
.wrapper--tight,
.wrapper--wide {
  margin-right: auto;
  margin-left: auto;
}
.wrapper--tight {
  max-width: 768px;
}
.wrapper--wide {
  max-width: 1440px;
}