/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

#tabbrowser-tabs,
#TabsToolbar,
#titlebar,
#TabsToolbar-customization-target {
  flex-direction: column;
  height: 100%;
}

:root[zen-single-toolbar='true'] {
  & #zen-appcontent-navbar-container,
  & #zen-sidebar-top-buttons {
    --zen-toolbar-height: 32px;
    height: var(--zen-toolbar-height);
  }

  @media (-moz-platform: macos) and (not (-moz-bool-pref: 'zen.view.mac.show-three-dot-menu')) {
    &:not([customizing]) #PanelUI-button:not([open]):not([panelopen]) {
      position: absolute;
      opacity: 0;
      pointer-events: none;
    }
  }

  & #zen-sidebar-top-buttons .toolbarbutton-1 {
    & > .toolbarbutton-icon {
      padding: 4px;
    }
  }

  & #zen-sidebar-top-buttons-separator {
    width: 100%;
  }
}

@media (-moz-bool-pref: 'zen.tabs.vertical') {
  :root:not([zen-window-buttons-reversed='true']) {
    & .titlebar-buttonbox-container {
      margin-left: auto;
      width: fit-content;
    }

    &:root[zen-right-side='true'] #zen-sidebar-top-buttons .titlebar-buttonbox-container {
      /* Must have the #zen-sidebar-top-buttons so we target it only when it's on the sidebar */
      margin-right: calc(-1 * var(--zen-toolbox-padding));
      margin-top: -10px /*Make sure this stays synced with the top buttons' margin!*/;
      height: calc(4px + var(--zen-toolbar-height)) !important;

      & .titlebar-button {
        align-items: end;
      }
    }
  }

  #tabbrowser-arrowscrollbox {
    min-height: fit-content !important;
  }
}

:root[zen-window-buttons-reversed='true'] .titlebar-buttonbox-container {
  margin-right: auto;
  width: fit-content;
}

#TabsToolbar > * {
  justify-content: center;
}

#browser {
  --zen-min-toolbox-padding: .4rem;
  @media (-moz-platform: macos) {
    --zen-min-toolbox-padding: .52rem;
  }
  @media (-moz-platform: linux) {
    --zen-min-toolbox-padding: .35rem;
  }
  --zen-toolbox-padding: max(var(--zen-min-toolbox-padding), calc(var(--zen-element-separation) / 1.5));
}

:root[zen-single-toolbar='true'] {
  #urlbar-container {
    width: -moz-available !important;
  }

  #identity-icon-box,
  #identity-permission-box {
    margin-top: auto;
    margin-bottom: auto;
    padding: 6px !important;
  }

  & #urlbar-container,
  & #urlbar {
    --urlbar-container-height: 40px;
    --urlbar-height: 38px !important;
  }

  & #nav-bar {
    margin-bottom: var(--zen-toolbox-padding);

    & toolbarspring {
      display: none;
    }
  }

  & #zen-sidebar-top-buttons {
    margin: 4px 0;
  }

  & #PanelUI-menu-button {
    padding: 0 !important;
  }
}

.vertical-pinned-tabs-container-separator {
  background: light-dark(rgba(1, 1, 1, 0.075), rgba(255, 255, 255, 0.1));
  margin: 8px auto;
  border: none;
  height: 1px;
  max-height: 1px;
  width: 98%;
  transition: margin 0.2s ease-in-out, background 0.2s ease-in-out, max-height 0.2s ease-in-out;

  #vertical-pinned-tabs-container .zen-workspace-tabs-section[hide-separator] & {
    max-height: 0;
    margin: 0 auto;
  }
}

#navigator-toolbox {
  --border-radius-medium: 10px;
  --tab-border-radius: 6px;
  --zen-toolbox-min-width: 1px;

  @media (-moz-platform: windows) {
    /* More native look */
    --border-radius-medium: 8px;
    --tab-border-radius: 6px;
  }

  @media (-moz-platform: macos) {
    /* More native look */
    --border-radius-medium: 12px;
    --tab-border-radius: 10px;
  }

  --tab-hover-background-color: color-mix(in srgb, var(--toolbarbutton-hover-background) 50%, transparent 50%);

  min-width: var(--zen-toolbox-min-width);
  margin-top: 0 !important; /* Fix full screen mode */

  padding-bottom: var(--zen-element-separation) !important;

  border: none;
  order: 0 !important;

  display: flex;
}

.titlebar-spacer[type='pre-tabs'],
.titlebar-spacer[type='post-tabs'] {
  display: none;
}

:root[zen-single-toolbar='true']:not([customizing]) {
  #zen-appcontent-navbar-container {
    display: flex;
    -moz-window-dragging: drag;
    min-height: var(--zen-element-separation);
    height: var(--zen-element-separation);

    & #PersonalToolbar {
      width: -moz-available;
    }

    /* We enable this trick IF we follow any of theses conditions:
      * - We are supposed to hide the window controls (e.g. left sidebar, windows like layouts)
      *    - This also involves linux's reverse GTK window controls, we'll need to handle that a bit differently
      * - If we are not in any of the above, we can still enable it if the user has bookmarks toolbar enabled
      */
    &:has(#PersonalToolbar[collapsed='false']) {
%include vertical-tabs-topbar.inc.css
    }

    &[should-hide='true'] {
%include vertical-tabs-topbar.inc.css
    }

    :root[inDOMFullscreen='true'] & {
      max-height: 0 !important;
      min-height: unset !important;
      opacity: 0 !important;
      pointer-events: none !important;
    }
  }
}

#TabsToolbar-customization-target {
  position: relative;
  max-width: 100%;
  gap: 0;
  &::after {
    content: '';
    display: block;
    height: 1px;

    margin: 0 auto;
    width: 80%;
    left: 50%;
    transform: translateX(-50%);
    position: absolute;
    bottom: calc(-1 * var(--zen-toolbox-padding));
  }

  & > * {
    border-top-width: 0 !important;
  }
}

#vertical-tabs-newtab-button {
  &:hover,
  &:not(:is(:hover, :active)) .toolbarbutton-icon {
    background: transparent !important;
  }
}

#tabbrowser-tabs {
  margin-inline-start: 0 !important;
  padding-inline-start: 0 !important;
  overflow-y: unset !important; /* DO NOT CHANGE THIS: Firefox renders badly workspace changes */
  overflow-x: clip;
  overflow-clip-margin: var(--zen-toolbox-padding);

  --tab-inner-inline-margin: 0;

  position: relative;
  border-bottom: 0px solid transparent !important;

  --tab-block-margin: 2px;
  --tab-selected-bgcolor: light-dark(rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.12));
  --tab-selected-shadow: 0 1px 1px 1px light-dark(rgba(0, 0, 0, 0.09), rgba(0, 0, 0, 0.1)) !important;
  grid-gap: 0 !important;

  &[overflow]::after,
  #vertical-tabs-newtab-button,
  #vertical-pinned-tabs-container-separator { /* notice #vertical-pinned-tabs-container-separator is an ID */
    /* Hide separator they give us, eww */
    display: none !important;
  }

  & .tabbrowser-tab {
    transition: scale 0.07s ease;

    &[zen-empty-tab] {
      display: none;
    }

    &:active {
      scale: 0.98;
    }

    max-width: unset;
    padding: 0 !important;

    position: relative;

    & .tab-background {
      overflow: hidden;

      & .tab-context-line {
        margin: 0 0px !important;
        width: 3px !important;
      }
    }

    @media (-moz-bool-pref: 'zen.tabs.dim-pending') {
      &[pending='true'] .tab-icon-image {
        opacity: 0.5;
      }
    }

    /* We have a tab inside a tab, this means, it's a glance tab */
    & .tabbrowser-tab {
      pointer-events: none;
      margin: 0 0 0 4px;
      --toolbarbutton-inner-padding: 0;
      --border-radius-medium: 8px;
      width: 24px;
      height: 24px;
      --tab-min-height: 24px;
      --tab-min-width: 24px;

      & .tab-background {
        background: var(--zen-toolbar-element-bg) !important;
        margin-block: 0 !important;
        margin-inline: 0 !important;
        box-shadow: none !important;
      }
      & .tab-content {
        padding: 0 5px;
      }
      & label { display: none !important; }
      & .tab-close-button,
      & .tab-reset-button {
        display: none !important;
      }

      & .tab-icon-image {
        --toolbarbutton-inner-padding: 0 !important;
        width: 14px;
        height: 14px;
      }
    }

    /* On essentials, glance tabs are floating */
    &[zen-essential='true'] .tabbrowser-tab {
      position: absolute;
      top: 0px;
      right: 0px;
      --tab-collapsed-width: 34px;
      --tab-min-height: 16px;
      width: var(--tab-collapsed-width) !important;
      z-index: 1;
      pointer-events: none;
      & .tab-background {
        /* Solid colors because we don't want to show the background */
        background: light-dark(rgb(249, 249, 249), rgb(63, 63, 63)) !important;
        border: 2px solid light-dark(rgba(0, 0, 0, 0.4), rgba(255, 255, 255, 0.4));
      }
    }
  }
}

#zen-sidebar-bottom-buttons {
  background: transparent;
  gap: 5px;
  align-items: center;

  padding-top: var(--zen-element-separation);
  --toolbarbutton-inner-padding: 5px;

  & > toolbarbutton:not(#zen-workspaces-button) {
    padding: 0 !important;
  }
}

#newtab-button-container {
  display: none !important;
}

#tabbrowser-arrowscrollbox {
  &::part(scrollbox) {
    gap: 0px !important;
  }

  &::part(overflow-start-indicator),
  &::part(overflow-end-indicator) {
    display: none !important;
  }
}

#zen-tabs-wrapper {
  min-height: fit-content;
  overflow-y: auto;
  height: 100%;
  scrollbar-width: thin;
}

#zen-browser-tabs-container {
  overflow-x: clip !important; /* might break custom css with new design, so let's force it */
  position: relative;
}

#vertical-pinned-tabs-container {
  padding-inline-end: 0 !important;
  display: flex !important;
  flex-direction: column;
  min-height: fit-content !important;
  overflow-x: clip;
  overflow-y: visible;
  max-height: unset !important;

  & .tabbrowser-tab:not(:hover) .tab-background:not([selected]):not([multiselected]) {
    background: transparent !important;
  }

  & .tabbrowser-tab .tab-content {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .tabbrowser-tab[zen-glance-tab='true'] {
    width: fit-content !important;
  }
}

/* Mark: toolbox as expanded */
#navigator-toolbox[zen-sidebar-expanded='true'] {
  --zen-toolbox-min-width: fit-content;

  --tab-icon-end-margin: 8.5px;
  padding: var(--zen-toolbox-padding);
  padding-left: 0;
  padding-top: 0;

  #PersonalToolbar:not([collapsed='true']) {
    padding-left: 0 !important;
  }

  & #titlebar {
    min-width: 150px;
  }

  & #tabbrowser-arrowscrollbox-periphery {
    margin-inline: var(--tab-block-margin);
  }

  & #nav-bar {
    padding-right: 0;

    :root[zen-single-toolbar='true'] & {
      & #urlbar:not([breakout-extend='true']) .urlbar-input-container {
        padding-left: 8px;
        padding-right: 4px;
      }
    }
  }

  & #nav-bar {
    margin-top: 0;
  }

  & #zen-workspaces-button[as-button='true'] {
    width: calc(100% - 10px) !important;
  }

  & .zen-current-workspace-indicator-icon[no-icon='true'] {
    display: none;
  }

  & #zen-workspaces-button {
    margin-left: 2px;
    margin-right: 2px;

    & .zen-workspace-sidebar-icon[no-icon='true'] {
      display: none;
    }
  }

  & #vertical-pinned-tabs-container:has(tab:not([hidden])) {
    position: relative;

    & .tabbrowser-tab {
      width: 100%;
    }
  }

  & #zen-sidebar-bottom-buttons {
    display: flex;
    /* Make sure the icons take most of the space, smartly */
    flex-direction: row;
    justify-content: space-between;

    width: 100%;
    position: relative;
  }

  & #zen-essentials-container {
    --tab-min-height: 44px;
  }

  /* Mark: Fix separator paddings */
  &[zen-right-side='true'] {
    padding-left: 0;
  }

  &:not([zen-right-side='true']) {
    padding-right: 0;
    padding-left: var(--zen-toolbox-padding);
  }

  & #TabsToolbar-customization-target {
    &::after {
      width: 100%;
      bottom: calc(-0.5 * var(--zen-toolbox-padding));
    }

    & > :is(toolbaritem, toolbarbutton):not(#search-container):not(#zen-workspaces-button),
    & #tabbrowser-arrowscrollbox-periphery > toolbarbutton {
      width: 100% !important;
      border-radius: var(--border-radius-medium) !important;

      padding-left: var(--toolbarbutton-inner-padding) !important;
      padding-right: var(--toolbarbutton-inner-padding) !important;

      & label {
        display: flex;
        width: 100%;
      }

      & image {
        height: 16px;
        width: 16px;
        padding: 0 !important;
      }

      &:is([open], [checked]) {
        background: var(--toolbarbutton-active-background) !important;

        & image,
        label {
          background: transparent !important;
        }
      }

      &:hover {
        background: var(--toolbarbutton-hover-background);

        & image,
        label {
          background: transparent !important;
        }
      }
    }
  }

  & #tabbrowser-tabs {
    --tab-inline-padding: 8px;
    & .tabbrowser-tab {

      & .tab-label-container {
        display: flex;
      }

      & .tab-background {
        margin-inline: var(--tab-block-margin);
        width: -moz-available;
      }

      &:is(:hover, [visuallyselected]) .tab-close-button {
        display: block;
        --tab-inline-padding: 0; /* Avoid weird padding */
        margin-inline-end: 0 !important;
      }

      .tab-throbber,
      .tab-icon-pending,
      .tab-icon-image,
      .tab-sharing-icon-overlay,
      .tab-icon-overlay {
        margin-inline-end: var(--toolbarbutton-inner-padding) !important;
        margin-inline-start: calc(var(--toolbarbutton-inner-padding) / 4) !important;
      }
    }
  }
}

:root:not([zen-sidebar-expanded='true']) {
  --tab-min-width: 36px !important;
  --zen-toolbox-padding: calc(var(--zen-element-separation) / 2 + 1px);
  --zen-toolbox-max-width: calc(var(--tab-min-width) + var(--zen-toolbox-padding) * 2);
}

/* Mark: collapsed sidebar */
#navigator-toolbox:not([zen-sidebar-expanded='true']) {
  max-width: var(--zen-toolbox-max-width) !important;
  min-width: var(--zen-toolbox-max-width) !important;
  & .zen-current-workspace-indicator-name,
  & .toolbarbutton-text {
    display: none !important;
  }
  & .zen-current-workspace-indicator {
    padding-left: 0;
    padding-right: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: .4;
    align-items: center;
  }
  & #zen-essentials-container {
    justify-content: center;
  }
  & #vertical-tabs-newtab-button {
    padding: 0 !important;
    background: transparent !important;
  }
  :root[customizing] & #zen-sidebar-bottom-buttons {
    min-width: unset !important;
  }
  & #zen-sidebar-top-buttons {
    justify-content: center;
    max-height: unset !important;
    height: fit-content !important;
  }
  & #titlebar {
    display: grid;
    grid-template-rows: auto 1fr;
  }
  & #zen-sidebar-top-buttons-customization-target {
    flex-direction: column;
    padding-top: var(--zen-element-separation);
  }
  & #zen-sidebar-bottom-buttons {
    display: flex;
    flex-direction: column;
    padding-top: var(--zen-element-separation);
    align-items: center;
  }
  & #tabbrowser-arrowscrollbox-periphery {
    & > toolbarbutton {
      margin: 0 auto !important;
      padding: 0 !important;
    }
    &::before {
      width: 90% !important;
    }
  }
  & #EssentialsToolbar {
    display: none !important;
  }
  & #essentials-accordion-header {
    display: none !important;
  }
  & #vertical-pinned-tabs-container:has(tab:not([hidden])) {
    position: relative;
    & .tabbrowser-tab {
      max-width: var(--tab-min-width);
    }
  }
  & #TabsToolbar-customization-target {
    padding-bottom: var(--zen-toolbox-padding);
    &::after {
      bottom: -1px !important;
    }
  }
  & #tabbrowser-tabs {
    margin-top: -2px;
    & .tabbrowser-tab {
      margin: 0 auto;
      & .tab-background {
        margin-inline: auto !important;
      }
      & .tab-reset-button {
        display: none !important;
      }
      & .tab-content {
        display: flex;
        align-content: center;
        justify-content: center;
        padding: 0 !important;
        & .tab-label-container {
          display: none !important;
        }
        & .tab-icon-image,
        & .tab-icon-pending {
          margin-inline-end: 0 !important;
        }
        /* Hide glances */
        & .tabbrowser-tab {
          display: none !important;
        }
      }
    }
    @media (-moz-bool-pref: 'zen.view.sidebar-collapsed.hide-mute-button') {
      & .tab-icon-overlay:is([soundplaying], [muted]):not([selected]) {
        display: none !important;
        :is(
            :root[uidensity='compact'],
            #tabbrowser-tabs[secondarytext-unsupported],
            :root:not([uidensity='compact']) #tabbrowser-tabs:not([secondarytext-unsupported]) .tabbrowser-tab:hover
          )
          .tab-icon-stack[indicator-replaces-favicon]
          > :not(&),
        :root:not([uidensity='compact'])
          #tabbrowser-tabs:not([secondarytext-unsupported])
          .tabbrowser-tab:not(:hover)
          &[indicator-replaces-favicon] {
          opacity: 1 !important;
        }
      }
    }
    & .tab-throbber,
    & .tab-icon-pending,
    & .tab-icon-image,
    & .tab-sharing-icon-overlay,
    & .tab-icon-overlay {
      margin-inline-end: 0 !important;
    }
  }
  & #zen-workspaces-button {
    flex-direction: column;
    &:not([as-button='true']) {
      & toolbarbutton {
        &[active='true']::after {
          bottom: 50% !important;
          transform: translateY(50%) !important;
        }
      }
    }
  }
}

:root:not([zen-sidebar-expanded='true']) #zen-sidebar-splitter {
  display: none !important;
}

/* Mark: Separator styling */
#zen-sidebar-splitter {
  opacity: 0;
  max-width: var(--zen-toolbox-padding) !important;
  min-width: var(--zen-toolbox-padding) !important;
  height: 100%;
  transition: opacity 0.2s ease-in-out;
  background: var(--zen-colors-border);
  appearance: none;
}

/* Mark: Move sidebar to the right */
:root[zen-right-side='true'] {
  & #navigator-toolbox {
    order: 10 !important;
  }

  & #zen-sidebar-splitter {
    order: 9 !important;
  }
}

/* Mark: Override the default tab close button */
#tabbrowser-tabs {
  & .tabbrowser-tab {
    &[pinned]:not([pending='true']) .tab-close-button {
      display: none !important;
    }

    &[pinned]:not([pending='true']):not([zen-essential]) {
      &:hover .tab-reset-button,
      &[visuallyselected] .tab-reset-button {
        display: block;
      }
    }

    &[zen-essential] .tab-reset-button {
      display: none;
    }

    &:not([pinned][visuallyselected]) .tab-reset-button {
      display: none;
    }

    &[selected] .tab-background {
      border-color: transparent;
    }
  }
}

.tab-reset-button {
  display: none;
  -moz-context-properties: fill, fill-opacity;
  border-radius: var(--tab-border-radius);
  color: inherit;
  fill: currentColor;
  padding: var(--tab-close-button-padding);
  width: 24px;
  height: 24px;
  outline: var(--toolbarbutton-outline);

  &:hover {
    outline-color: var(--toolbarbutton-hover-outline-color);
  }

  &:hover:active {
    outline-color: var(--toolbarbutton-active-outline-color);
  }
}

.reset-icon {
  appearance: none;

}

@media not (forced-colors) {
  .tab-reset-button:hover {
    background-color: color-mix(in srgb, currentColor 10%, transparent);
  }

  .tab-reset-button:hover:active {
    background-color: color-mix(in srgb, currentColor 20%, transparent);
  }
}

.tab-reset-button> .button-icon,
.tab-reset-button > .button-box > .button-icon,
.tab-reset-button > .toolbarbutton-icon {
  margin: 0;
}

.tab-reset-button > .button-box > .button-text,
.tab-reset-button > .toolbarbutton-text {
  display: none;
}


/* Customization mode */
/*:root[customizing] #TabsToolbar > *:not(#zen-sidebar-bottom-buttons) {
  overflow: hidden;
  max-width: 0 !important;
  margin-right: var(--zen-element-separation);
  padding: 0 !important;
  opacity: 0;
  display: none;
}*/

:root[customizing] #TabsToolbar > *,
:root[customizing] #TabsToolbar-customization-target {
  min-width: unset !important;
}

/* Mark: Sidebar top buttons */
#zen-sidebar-top-buttons {
  order: -1;

  min-width: unset !important;

  :root[zen-sidebar-expanded='true'] & {
    --toolbarbutton-inner-padding: var(--zen-toolbar-button-inner-padding) !important;
  }

  :root[zen-single-toolbar='true'] & {
    --toolbarbutton-inner-padding: calc(var(--zen-toolbar-button-inner-padding) - 2px) !important;

    & #PanelUI-button {
      order: -2;
    }

    & #unified-extensions-button {
      order: -1;
    }
  }

  & #zen-sidebar-top-buttons-customization-target {
    height: 100%;
    align-items: center;

    :root:not([zen-sidebar-expanded='true']):not([zen-right-side='true']) {
      padding-inline-start: var(--zen-toolbox-padding);
    }

    #nav-bar & {
      padding-inline-start: var(--toolbarbutton-outer-padding);
    }

    :root[zen-right-side='true'] & {
      padding-inline-end: var(--zen-toolbox-padding);
    }

    & toolbarbutton:not(.titlebar-button) {
      height: calc(2 * var(--toolbarbutton-inner-padding) + 16px);
      padding: 0 var(--toolbarbutton-outer-padding) !important;
    }

    :root:not([zen-sidebar-expanded='true']) & toolbarspring {
      display: none;
    }
  }

  & .zen-sidebar-action-button {
    padding: 0 !important;

    & label {
      display: none !important;
    }
  }
}

#tabs-newtab-button {
  display: none;
  opacity: 0.5;
}

@media (-moz-bool-pref: 'zen.tabs.show-newtab-vertical') {
  #tabs-newtab-button {
    display: flex !important;
    transition: scale 0.1s ease;
    & .toolbarbutton-text {
      align-items: center;
      padding-top: 0;
    }

    &:active,
    &[open] {
      scale: 0.98;
    }

    &[in-urlbar] {
      background: var(--tab-selected-bgcolor) !important;
      opacity: 1 !important;
      box-shadow: var(--tab-selected-shadow);
    }
  }

  #tabbrowser-arrowscrollbox-periphery {
    @media not (prefers-color-scheme: dark) {
      --zen-colors-border: var(--zen-colors-tertiary);
    }

    @media (-moz-bool-pref: 'zen.view.show-newtab-button-top') {
      order: -1;
    }

    @media (-moz-bool-pref: 'zen.view.show-newtab-button-border-top') and (not (-moz-bool-pref: 'zen.view.show-newtab-button-top')) {
    #tabbrowser-arrowscrollbox:has(tab:not([hidden])) & {
      margin-top: 15px;
      position: relative;
      &::before {
        content: '';
        display: block;
        height: 1px;
        background: light-dark(rgba(1, 1, 1, 0.075), rgba(255, 255, 255, 0.1));
        width: 98%;
        position: absolute;
        top: -8px;
        left: 50%;
        transform: translateX(-50%);
      }
    }
  }
  }
}


/* Mark: Essentials Toolbar */
#zen-essentials-container {
  padding-bottom: var(--zen-toolbox-padding);
  overflow: hidden;
  gap: 3px;
}

#zen-essentials-container {
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  opacity: 1;
  grid-template-columns: repeat(auto-fit, minmax(var(--tab-pinned-min-width-expanded), auto));
  overflow: hidden;
  scrollbar-width: thin;
  display: grid;
  padding: 0;
}

#zen-essentials-container > .tabbrowser-tab,
#zen-welcome-initial-essentials-browser-sidebar-essentials .tabbrowser-tab {
  --toolbarbutton-inner-padding: 0;
  max-width: unset;
  width: 100% !important;

  & .tab-background {
    border-radius: var(--border-radius-medium) !important;
    transition: background 0.1s ease-in-out;
  }

  --tab-selected-bgcolor: light-dark(rgba(255, 255, 255, 0.85), rgba(255, 255, 255, 0.2));

  &:not([visuallyselected], [multiselected="true"]) .tab-background {
    background: var(--zen-toolbar-element-bg);
    border: none;
  }

  & .tab-content {
    display: flex;
    justify-content: center;
  }

  & .tab-label-container {
    display: none !important;
  }

  & .tab-close-button {
    display: none !important;
  }

  & .tab-icon-image,
  & .tab-icon-overlay {
    margin-inline-end: 0 !important;
  }

  &:hover .tab-background {
    background: var(--tab-selected-bgcolor);
  }

  @media (-moz-bool-pref: 'zen.theme.essentials-favicon-bg') {
    &[visuallyselected] > .tab-stack > .tab-background {
      &::after {
        content: "";
        inset: -50%;
        filter: blur(15px);
        position: absolute;
        background-size: 100% 100%;
        background-clip: padding-box;
        background-image: var(--zen-tab-icon);
        z-index: -1;
      }

      background: transparent;
      overflow: hidden;
      position: relative;
      --zen-essential-bg-margin: 2px;

      &::before {
        background: light-dark(rgba(255, 255, 255, 0.85), rgba(68, 64, 64, 0.85));
        margin: var(--zen-essential-bg-margin);
        border-radius: calc(var(--border-radius-medium) - var(--zen-essential-bg-margin));
        position: absolute;
        inset: 0;
        z-index: 0;
        content: "";
        transition: background 0.1s ease-in-out;
      }
    }

    &[visuallyselected]:hover .tab-background::before {
      background: light-dark(rgba(255, 255, 255, 0.80), rgba(68, 64, 64, 0.80));
    }
  }
}


/* Very special occasions */

/* Mark: Right side windows controls with collapsed sidebar */
:root:not([zen-compact-mode='true']) {
  &[zen-right-side='true']:not([zen-sidebar-expanded='true']):not([zen-window-buttons-reversed='true']) {
    & #navigator-toolbox {
      margin-top: var(--zen-toolbar-height) !important;
    }

    & .titlebar-buttonbox-container {
      margin-right: calc(-1 * var(--zen-toolbox-max-width)) !important;
    }

    & #zen-appcontent-wrapper {
      overflow-x: visible;
    }

    & #zen-sidebar-top-buttons-customization-target {
      padding-top: 0;
    }

    & #zen-appcontent-navbar-container {
      padding-left: var(--zen-element-separation);
    }

%include vertical-tabs-topbuttons-fix.css
  }

  &:not([zen-right-side='true']):not([zen-sidebar-expanded='true'])[zen-window-buttons-reversed='true'] {
    & #navigator-toolbox {
      margin-top: var(--zen-toolbar-height) !important;
    }

    & .titlebar-buttonbox-container {
      margin-left: calc(-1 * var(--zen-toolbox-max-width)) !important;
    }

    & #zen-appcontent-wrapper {
      overflow-x: visible;
    }

    & #zen-sidebar-top-buttons-customization-target {
      padding-top: 0;
    }

    & #zen-appcontent-navbar-container {
      padding-right: var(--zen-element-separation);
    }

%include vertical-tabs-topbuttons-fix.css
  }
}

/* Vertical tabs reordering indicators */
#zen-drag-indicator {
  --zen-drag-indicator-height: 2px;
  --zen-drag-indicator-bg: color-mix(in srgb, var(--zen-primary-color) 50%, light-dark(rgba(0, 0, 0, .85), rgba(255, 255, 255, .95)) 50%);
  position: fixed;
  z-index: 1000;
  background: var(--zen-drag-indicator-bg);
  pointer-events: none;
  border-radius: 5px;

  &::before {
    content: "";
    position: absolute;
    height: calc(2 * var(--zen-drag-indicator-height));
    width: calc(2 * var(--zen-drag-indicator-height));
    border: var(--zen-drag-indicator-height) solid var(--zen-drag-indicator-bg);
    border-radius: 50%;
    background: transparent;
  }

  &[orientation='horizontal'] {
    left: calc(var(--indicator-left) + 2 * var(--zen-drag-indicator-height) + 4px);
    width: calc(var(--indicator-width) - 2 * var(--zen-drag-indicator-height) - 4px);
    height: var(--zen-drag-indicator-height);
    transition: top 0.1s ease-out, left 0.1s ease-out, width 0.1s ease-out;

    &::before {
      left: calc(-2 * var(--zen-drag-indicator-height));
      top: 50%;
      transform: translate(calc(-1 * var(--zen-drag-indicator-height)), -50%);
    }
  }

  &[orientation='vertical'] {
    top: calc(var(--indicator-top) + 2 * var(--zen-drag-indicator-height) + 4px);
    height: calc(var(--indicator-height) - 2 * var(--zen-drag-indicator-height) - 4px);
    width: var(--zen-drag-indicator-height);
    transition: top 0.1s ease-out, left 0.1s ease-out, height 0.1s ease-out;

    &::before {
      top: calc(-2 * var(--zen-drag-indicator-height));
      left: 50%;
      transform: translate(-50%, calc(-1 * var(--zen-drag-indicator-height)));
    }
  }
}

/* Horizontal tabs reordering indicators */
#zen-essentials-container .tabbrowser-tab.drag-over-before {
  box-shadow: 3px 0 6px -2px var(--toolbarbutton-active-background, rgba(0, 255, 0, 0.2));
}

#zen-essentials-container .tabbrowser-tab.drag-over-after {
  box-shadow: -3px 0 6px -2px var(--toolbarbutton-active-background, rgba(0, 255, 0, 0.2));
}

/* Renaming tabs */
.tab-label-container-editing {
  display: none !important;
}

#tab-label-input {
  white-space: nowrap;
  overflow-x: scroll;
  margin: 0;
  background: transparent;
  border: none;
  padding: 0;
}

/* Section: tab workspaces stylings */
.zen-workspace-tabs-section {
  position: absolute;
  transform: translateX(-100%);
  min-width: 100%;
}