Full Theatre - YouTube by TGekko

/* ==UserStyle==
@name        Full Theatre - YouTube
@namespace   youtube.com
@version     1.0.0
@license     MIT
@author      TGekko (https://www.tgekko.com/)
@description Remove distractions while distracting yourself! Make YouTube's theatre mode fill the window instead of becoming only slightly larger.
==/Userstyle== */

@-moz-document domain('youtube.com') {
 html {
  overflow-x: hidden;
 }
 ytd-masthead[theater]:not([fullscreen]) {
  position: sticky !important;
 }
 ytd-watch-flexy[theater]:not([fullscreen]),
 [theater]:not([fullscreen]) .html5-video-player {
  position: absolute !important;
  top: 0px !important;
  background: black !important;
  width: 100vw !important;
  height: 100vh !important;
 }
 [theater]:not([fullscreen]) .html5-video-player  {
  z-index: 10000 !important;
 }
 [theater]:not([fullscreen]) #columns {
  position: absolute !important;
  top: 100vh !important;
 }
 ::-webkit-scrollbar {
  width: 1px !important;
  height: 1px !important;
 }
 ::-webkit-scrollbar-track {
  background: transparent !important;
 }
 ::-webkit-scrollbar-thumb {
  border-radius: 0.5px !important;
  background: #FFF5 !important;
 }
 ::-webkit-scrollbar-thumb:hover {
  background: #FFF9 !important;
 }
}