/* =========================================================
   COMPLETE PURE JET BLACK OVERRIDE FOR ABOUT:PREFERENCES
   ========================================================= */
@-moz-document url-prefix("about:preferences") {

  /* Force Firefox's internal layout engine variables to absolute black */
  :root {
    --in-content-page-background: #000000 !important;
    --in-content-box-background: #000000 !important;
    --in-content-box-background-odd: #000000 !important;
    --in-content-sidebar-background: #000000 !important;

    /* Clean text contrast against pitch black */
    --in-content-text-color: #e0e0e0 !important;
    --in-content-deemphasized-text: #a0a0a0 !important;

    background-color: #000000 !important;
  }

  /* Force the outer frame, background walls, and search margins black */
  page, html, body, .main-content, #preferences-content, .categorybox {
    background-color: #000000 !important;
    color: #e0e0e0 !important;
  }

  /* TARGET THE LEFT NAVIGATION STRIP: Force the category list wall pure black */
  .navigation, #categories, category {
    background-color: #000000 !important;
    border-right: none !important;
  }

  /* Fix individual row hovering states inside the left menu strip */
  richlistitem.category[selected="true"] {
    background-color: #1a1a1a !important;
    color: #ffffff !important;
  }

  richlistitem.category:hover {
    background-color: #121212 !important;
  }

  /* Make the top search box area blend completely into the pure black ceiling */
  .search-container, #search-box {
    background-color: #121212 !important;
    border: 1px solid #252525 !important;
    color: #ffffff !important;
  }

  /* Clean up all action buttons, text fields, and dropdown elements */
  input, select, button, menulist, tabpanels, textbox {
    background-color: #161616 !important;
    color: #ffffff !important;
    border: 1px solid #2a2a2a !important;
  }

  /* Keep all links sharply legible and blue */
  a, .link, .text-link {
    color: #64b5f6 !important;
  }
}