wagtail/client/scss/layouts/_report.scss

.report {
  display: grid;
  grid-template-columns: auto;
  grid-column-gap: 50px;
  margin-inline-start: 50px;
  margin-inline-end: 50px;

  &--has-filters {
    grid-template-columns: auto 300px;
  }

  &__results {
    grid-column-start: col-start 1 col-end 2;

    &--text {
      margin: 0 0.5em 0.5em 0;

      + .status-tag {
        margin-inline-start: 0;
      }
    }

    &--comment {
      display: block;
    }
  }

  &__filters {
    grid-column-start: col-start -2 col-end -1;

    button[type='submit'] {
      display: block;
      margin-bottom: 20px;
    }

    input[type='checkbox'] {
      display: block;
      margin-bottom: 10px;
    }

    // Get rid of Wagtail's overrides
    label {
      float: unset;
      display: block;
      width: unset;
      padding-top: 1.2em;
    }
  }

  &__actions > div {
    float: right;
    display: block;
    margin-inline-end: 10px;
  }

  @include media-breakpoint-down(sm) {
    &--has-filters {
      grid-template-columns: auto;
    }

    &__filters {
      grid-row: 1;
    }

    form {
      margin-bottom: 1em;
    }
  }
}