.container

margin: 0 auto
position: relative
+desktop
  max-width: $desktop - (2 * $gap)
  width: $desktop - (2 * $gap)
  &.is-fluid
    margin-left: $gap
    margin-right: $gap
    max-width: none
    width: auto
+until-widescreen
  &.is-widescreen
    max-width: $widescreen - (2 * $gap)
    width: auto
+until-fullhd
  &.is-fullhd
    max-width: $fullhd - (2 * $gap)
    width: auto
+widescreen
  max-width: $widescreen - (2 * $gap)
  width: $widescreen - (2 * $gap)
+fullhd
  max-width: $fullhd - (2 * $gap)
  width: $fullhd - (2 * $gap)