retrospring/app/javascript/styles/components/_question.scss

.question {
  &--fixed {
    position: absolute;
    width: 100%;
    z-index: 999;

    @include media-breakpoint-up('sm') {
      position: fixed;
    }
  }

  &--hidden {
    visibility: hidden;
    position: relative;
    box-shadow: none;
    z-index: -1;
  }
}