s4k - autohide_main_toolbar.css - FIXED

/* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/autohide_main_toolbar.css made available under Mozilla Public License v. 2.0
See the above repository for updates as well as full license text. */

/* This style hides the main toolbar and shows it when the cursor is over the tabs toolbar as well as whenever the focus is inside nav-bar, such as when urlbar is focused. */

:root{
  --uc-navbar-transform: var(--amt-transform);                  /* userChrome.css */
  --uc-autohide-toolbar-delay: var(--amt-delay);                /* userChrome.css */
  --uc-autohide-toolbar-duration: var(--amt-duration);          /* userChrome.css */
}
:root[uidensity="compact"]{ --uc-navbar-transform: -34px }

#navigator-toolbox > div{ display: contents; }
:root[sessionrestored] :where(#nav-bar,#PersonalToolbar,#tab-notification-deck,.global-notificationbox){
  transform: translateY(var(--uc-navbar-transform))
}
:root:is([customizing],[chromehidden*="toolbar"]) :where(#nav-bar,#PersonalToolbar,#tab-notification-deck,.global-notificationbox){
  transform: none !important;
  opacity: 1 !important;
}

#nav-bar:not([customizing]){
  opacity: 0;
  transition:  transform var(--uc-autohide-toolbar-duration) ease var(--uc-autohide-toolbar-delay), opacity var(--uc-autohide-toolbar-duration) ease var(--uc-autohide-toolbar-delay) !important;
  position: relative;
  z-index: 2;
}
#titlebar{ position: relative; z-index: 3 }

#navigator-toolbox,
#sidebar-box,
#sidebar-main,
#sidebar-splitter,
#tabbrowser-tabbox{
  z-index: auto !important;
}
/* Show when toolbox is focused, like when urlbar has received focus */
#navigator-toolbox:focus-within > .browser-toolbar{
  transform: translateY(0);
  opacity: 1;
  transition-duration: var(--uc-autohide-toolbar-duration), var(--uc-autohide-toolbar-duration) !important;
  transition-delay: 0s !important;
}
/* Show when toolbox is hovered */
#titlebar:hover ~ .browser-toolbar,
.browser-titlebar:hover ~ :is(#nav-bar,#PersonalToolbar),
#nav-bar:hover,
#nav-bar:hover + #PersonalToolbar{
  transform: translateY(0);
  opacity: 1;
  transition-duration: var(--uc-autohide-toolbar-duration), var(--uc-autohide-toolbar-duration) !important;
  transition-delay: 0s !important;
}
:root[sessionrestored] #urlbar[popover]{
  opacity: 0;
  pointer-events: none;
  transition: transform var(--uc-autohide-toolbar-duration) ease var(--uc-autohide-toolbar-delay), opacity var(--uc-autohide-toolbar-duration) ease var(--uc-autohide-toolbar-delay);
  transform: translateY(var(--uc-navbar-transform));
}
#mainPopupSet:has(> [role="group"][panelopen]) ~ toolbox #urlbar[popover],
.browser-titlebar:is(:hover,:focus-within) ~ #nav-bar #urlbar[popover],
#nav-bar:is(:hover,:focus-within) #urlbar[popover],
#urlbar-container > #urlbar[popover]:is([focused],[open]){
  opacity: 1;
  pointer-events: auto;
  transition-delay: 0ms;
  transform: translateY(0);
}
#urlbar-container > #urlbar[popover]:is([focused],[open]){
 transition-duration: 100ms; /* Faster when focused */
}
/* This ruleset is separate, because not having :has support breaks other selectors as well */
#mainPopupSet:has(> [role="group"][panelopen]) ~ #navigator-toolbox > .browser-toolbar{
  transition-delay: 33ms !important;
  transform: translateY(0);
  opacity: 1;
}
/* If tabs are in sidebar then nav-bar doesn't normally have its own background - so we nee to add it back */
#nav-bar.browser-titlebar{
  background: inherit;
}
#toolbar-menubar:not([autohide="true"]) ~ #nav-bar.browser-titlebar{
  background-position-y: 0px; /* best guess, could vary */
  border-top: none !important;
}

/* Bookmarks toolbar needs so extra rules */
#PersonalToolbar{ transition: transform var(--uc-autohide-toolbar-duration) ease var(--uc-autohide-toolbar-delay) !important; position: relative; z-index: 1 }

/* Move up the content view */
:root[sessionrestored]:not([inFullscreen],[chromehidden~="toolbar"]) > body > #browser{ margin-top: var(--uc-navbar-transform); }