searxng/searx/static/themes/simple/src/less/style-highcontrast.less

@media (forced-colors: active) {
  // toolkit.less
  html body select {
    appearance: auto;
    -webkit-appearance: auto;
    -moz-appearance: auto;
    background: none;
    border: 1px solid lightgray;
    padding: inherit;

    &:hover,
    &:focus {
      background-color: inherit;
    }

    option {
      background-color: inherit;
    }
  }

  // toolkit.less
  input.checkbox-onoff[type="checkbox"] {
    -webkit-appearance: auto;
    -moz-appearance: auto;
    appearance: auto;
    background: none;
    margin: inherit;
    padding: inherit;
    width: auto;
    font-size: 1.5em;

    &:focus,
    &:hover {
      outline: inherit;
    }

    &::after,
    &::before,
    &:focus::after,
    &:focus::before,
    &:hover::after,
    &:hover::before {
      display: none;
      content: inherit;
    }
  }

  // details.less
  #results.image-detail-open article.result-images[data-vim-selected] .detail {
    a.result-detail-close,
    a.result-detail-next,
    a.result-detail-previous {
      filter: none;
    }
  }

  // search.less
  #q {
    border: 1px solid black;
    .ltr-border-right(none);
  }

  #clear_search {
    border-top: 1px solid black;
    border-bottom: 1px solid black;
  }

  #send_search {
    border: 1px solid black;
    .ltr-border-left(none);
  }

  .category {
    label {
      height: 21px;
      font-size: 1rem;
      border: inherit;
      padding-right: 0.5rem;
      padding-left: 0.5rem;

      svg {
        display: none;
      }
    }

    input[type="checkbox"]:checked + label {
      filter: invert(100%);
      background-color: white;
      color: black;
      border: inherit;
    }
  }

  // autocomplete.less
  .autocomplete.open {
    border: 2px solid black;
    width: calc(44rem - 4px);

    > ul > li {
      &.active,
      &:active,
      &:focus,
      &:hover {
        filter: invert(100%);
      }
    }
  }

  // style.less
  article[data-vim-selected] {
    outline: 0.2rem solid var(--color-result-vim-arrow);
    outline-offset: 0.25rem;
    border-radius: 10px;
  }

  article[data-vim-selected].category-videos,
  article[data-vim-selected].category-news,
  article[data-vim-selected].category-map,
  article[data-vim-selected].category-music,
  article[data-vim-selected].category-files,
  article[data-vim-selected].category-social {
    border: 1px dotted var(--color-result-vim-arrow);
    box-shadow: none;
  }

  // preferences.less
  #main_preferences .value input[type="text"] {
    border: 1px solid black;
  }
}