@media screen and (max-width: 559px) {
  .structure {
    flex-direction: column;
  }

  header {
    margin-right: 1em;
  }

  .sidebar {
    flex-direction: row;
    order: 2;
    width: 95%;
    max-width: none;
    height: fit-content;
    justify-content: space-around;
    padding: 0.5em 0;
    font-size: 0.9em;
    background-color: #445d883b;
    overflow-x: hidden;
  }

  .sidebar-background {
    visibility: hidden;
    width: 0%;
    height: 0%;
  }

  .menu-wrapper {
    float: left;
    margin: 0;
    max-width: 100%;
    text-align: center;
    display: inline-block;
  }

  .menu-wrapper ul  {
    max-width: 100%;
    text-align: center;
    display: flex;
    flex-flow: row nowrap;
    align-items: center;
    justify-content: space-around;
  }

  .sidebar-item {
    visibility: hidden;
    margin: 0 0.5em 0;
  }

  .header {
    margin: 1em auto;
  }

  .header-logo {
    max-width: 100px;
  }

  .mainspace {
    margin: 0 auto 0;
    order: 1;
    width: 90%;
  }

  .design-interface {
    display: flex;
    flex-flow: row wrap;
    align-items: flex-start;
    justify-content: center;
    margin: 0.5em 0;
    width: 100%;
  }

  .parser-layout {
    display: flex;
    flex-flow: column nowrap;
    align-items: center;
    justify-content: space-around;
    margin: 0 auto;
    width: 100%;
    line-height: 1.3;
  }

  .wiki-content-area {
    margin: 0 auto;
    width: 100%;
  }

  #wikiWidget {
    width: 100%;
    min-width: min-content;
    margin: 0em;
    display: flex;
    flex-flow: row nowrap;
    align-items: flex-start;
    justify-content: space-between;
    /* position: sticky;
    top: 2em; */
  }

  .mw-text-wrapper {
    /* overflow-y: scroll; */
    /* vertical-align: bottom; */
    height: fit-content;
  }

  .interface-element {
    margin: 0.2em auto;
    padding: 0;
    justify-content: space-between;
  }

  .interface-element p, h4 {
    margin: 0.2em auto;
    white-space: pre-line;
  }

  .features-block {
    flex-direction: column;
    align-items: center;
  }

  .feature-item {
    width: 80%;
    max-width: 440px;
  }

  .features {
    margin-top: 1em;
    align-items: center;
  }

  .features .section-heading {
    margin: 0.5em;
    padding: 0;
  }

  .owl-carousel .item {
    width: 150px;
    height: 100px;
  }
  .owl-carousel {
    height: 120px;
    margin: 10px 15px 10px 15px;
  }

  footer {
    align-items: center;
    justify-content: center;
    margin: 0 auto 0;
  }

  footer ul {
    flex-flow: row wrap;
  }

  footer li a {
    padding: 0.5em;
    white-space: nowrap;
    height: 1.5em;
  }
}

@media screen and (min-width: 819px) {
  .sidebar  {
    margin-left: 1em;
    margin-right: 1em;
  }

  .sidebar-item {
    margin-top: 2em;
  }

  .header-text {
    font-size: 1.9em;
    margin-right: 1.5vw;
  }

  .feature-item h3 {
    font-size: 1.3em;
  }

}

@media screen and (min-width: 959px) {
  .owl-carousel .item {
    width: 210px;
    height: 140px;
  }
  .owl-carousel {
    height: 150px;
    margin: 10px 20px 10px 10px;
  }
  .owl-wrapper {
    width: 95%;
    margin: 8em 2em 1em 0em;
    height: 450px;
    perspective: 205px;
    overflow-x: default;
  }

  #owl_1 {
    transform: translateX( 21vw ) rotateY( 10deg ) rotateZ( -2deg );
    margin-left: -7em;
  }

  #owl_2 {
    transform: translateX( -15vw ) rotateY( -10deg ) rotateZ( 2deg );
    margin-right: -7em;
  }

}