#mPostranni {
  display: none;
}

@media (min-width: 87.5rem) {
  #mPostranni {
    display: block;
    left: 50%;
    margin: 0 auto;
    max-width: var(--page-max-width);
    position: absolute;
    top: 0;
    transform: translateX(-50%);
    width: 100%;
  }

  #mPostranni #postranniLevy {
    overflow: hidden;
    position: absolute;
    right: 100%;
    top: var(--spacing-md);
  }

  #mPostranni #postranniPravy {
    left: 100%;
    overflow: hidden;
    position: absolute;
    top: var(--spacing-md);
  }
}