wagtail/client/scss/components/_grid.legacy.scss

.wrapper {
  @include clearfix();
  height: 100vh;
  transition: transform 0.2s ease;

  @include media-breakpoint-up(sm) {
    @include transition(padding-inline-start $menu-transition-duration ease);
    transform: none;
    padding-inline-start: $menu-width;

    .sidebar-collapsed & {
      padding-inline-start: $menu-width-slim;
    }
  }
}

.content-wrapper {
  box-sizing: border-box;
  width: 100%;
  height: 100%; // this has no effect on desktop, but on mobile it helps aesthetics of menu popout action
  float: left;
  position: relative;
  background-color: $color-grey-4;
  border-bottom: 1px solid $color-grey-3;
}

.content {
  @include row();
  background: $color-white;
  border-top: 0 solid $color-grey-5; // this top border provides space for the floating logo to toggle the menu
  min-height: 100%;
  position: relative; // yuk. necessary for positions for jquery ui widgets

  @include media-breakpoint-up(sm) {
    padding-bottom: 4em;
  }
}

@include media-breakpoint-up(sm) {
  .content {
    border-top: 0;
    background-color: none;
    padding-top: 0;
  }
}

.row {
  @include clearfix();
}

@include media-breakpoint-up(sm) {
  .col1 {
    @include column(1);
  }

  .col2 {
    @include column(2);
  }

  .col3 {
    @include column(3);
  }

  .col4 {
    @include column(4);
  }

  .col5 {
    @include column(5);
  }

  .col6 {
    @include column(6);
  }

  .col7 {
    @include column(7);
  }

  .col8 {
    @include column(8);
  }

  .col9 {
    @include column(9);
  }

  .col10 {
    @include column(10);
  }

  .col11 {
    @include column(11);
  }

  .col12 {
    @include column(12);
  }

  .row {
    @include row();
  }

  .row-flush {
    @include row-flush();
  }
}