Pin Comments Form to window

Pin the Fimfiction comments form to the bottom of the window

/* ==UserStyle==
@name Pin Comments Form to window
@author @YR Foxtaur
@description Pin the Fimfiction comments form to the bottom of the window
@version 1.1
@namespace https://greasyfork.org/en/users/703495
@license CC-BY 4.0
==/UserStyle== */
@-moz-document domain("fimfiction.net"){
/*pin rule*/
  #add_comment_box
  {
    position: sticky !important;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 5;
    margin-bottom: 0 !important;
  }

/*autoscroll kill*/
  #new_comment
  {
    position: fixed !important;
    top: 0 !important;
    right: 0;
  }

/*[[compactify]]*/
/*Collapse Rules*/
  #add_comment_box #comment_comment
  {
    display: none !important;
  }

  #add_comment_box:hover #comment_comment
  {
    display: block !important;
  }
}