/* 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/. */

@namespace html url("http://www.w3.org/1999/xhtml");

:root {
  --tab-min-height: 36px;
  &[uidensity=compact] {
    --tab-min-height: 29px;
  }
  &[uidensity=touch] {
    --tab-min-height: 41px;
  }

  --inline-tab-padding: 8px;
  --tab-border-radius: 4px;
  --tab-shadow-max-size: 6px;
  --tab-block-margin: 4px;
  --tab-selected-textcolor: var(--toolbar-color);
  --tab-selected-bgcolor: var(--toolbar-bgcolor);
  --tab-selected-color-scheme: var(--toolbar-color-scheme);

  &[lwt-tab-selected="light"] {
    --tab-selected-color-scheme: light;
  }
  &[lwt-tab-selected="dark"] {
    --tab-selected-color-scheme: dark;
  }

  /* --tabpanel-background-color matches $in-content-page-background in newtab
     (browser/components/newtab/content-src/styles/_variables.scss) */
  --tabpanel-background-color: #F9F9FB;
  @media (-moz-content-prefers-color-scheme: dark) {
    --tabpanel-background-color: #2B2A33;
  }
  &[privatebrowsingmode=temporary] {
    /* Value for --in-content-page-background in aboutPrivateBrowsing.css.
       !important overrides the direct setting of this variable in
       ThemeVariableMap.sys.mjs when the user has a theme that defines
       ntp_background. */
    --tabpanel-background-color: #25003e !important;

    /* stylelint-disable-next-line media-query-no-invalid */
    @media (-moz-bool-pref: "browser.privatebrowsing.felt-privacy-v1") {
      --tabpanel-background-color: linear-gradient(45deg, #722291 0%, #45278D 50%, #393473 100%) !important;
    }
  }
}

#tabbrowser-tabpanels {
  appearance: none;
  padding: 0;
  color-scheme: unset;
  background: var(--tabpanel-background-color);

  browser[type=content] {
    color-scheme: env(-moz-content-preferred-color-scheme);
  }
}

#tabbrowser-tabs {
  --tab-min-width: 76px;
  --tab-loading-fill: #0A84FF;
  --tab-overflow-pinned-tabs-width: 0px;
  padding-inline: var(--tab-overflow-pinned-tabs-width) 0;
  /* Use a bigger flex value than the searchbar to prevent it from
   * taking all the toolbar space. */
  flex: 1000 1000;

  &[positionpinnedtabs] > #tabbrowser-arrowscrollbox::part(scrollbox) {
    /* Add padding to match the shadow's blur radius so the
       shadow doesn't get clipped when either the first or
       last tab is selected */
    padding-inline: var(--tab-shadow-max-size);
  }
}

.tabbrowser-tab {
  appearance: none;
  background-color: transparent;
  color: inherit;
  color-scheme: unset;
  border-radius: 0;
  border-width: 0;
  margin: 0;
  padding: 0 2px;
  align-items: stretch;
  /* Needed so that overflowing content overflows towards the end rather than
     getting centered. That prevents tab opening animation from looking off at
     the start, see bug 1759221. */
  justify-content: flex-start;
  overflow: clip;
  /* Needed to avoid clipping the tab-background shadow, which has a 4px blur
   * (we only have 2px padding in the inline direction) */
  overflow-clip-margin: 2px;

  &[pinned] {
    flex-shrink: 0;
  }

  /* tabbrowser-tab keyboard focus */
  &.keyboard-focused-tab > .tab-stack > .tab-background,
  &:focus:not([aria-activedescendant]) > .tab-stack > .tab-background {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-inset);
  }
}

.tab-content {
  padding: 0 var(--inline-tab-padding);
  min-width: 0;

  :root:not([uidensity=compact]) &[pinned] {
    padding: 0 10px;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .tab-loading-burst {
    border-radius: inherit;
    position: relative;
    overflow: hidden;

    &::before {
      position: absolute;
      content: "";
      /* We set the width to be a percentage of the tab's width so that we can use
         the `scale` transform to scale it up to the full size of the tab when the
         burst occurs. We also need to set the margin-inline-start so that the
         center of the burst matches the center of the favicon. */
      width: 5%;
      height: 100%;
      /* Center the burst over the .tab-loading-burst; it's 9px from the edge thanks
         to .tab-content, plus 8px more since .tab-loading-burst is 16px wide. */
      margin-inline-start: calc(17px - 2.5%);
    }

    &[pinned]::before {
      /* This is like the margin-inline-start rule above, except that icons for
         pinned tabs are 12px from the edge. */
      margin-inline-start: calc(20px - 2.5%);
    }

    &[bursting]::before {
      background-image: url("chrome://browser/skin/tabbrowser/loading-burst.svg");
      background-position: center center;
      background-size: 100% auto;
      background-repeat: no-repeat;
      animation: tab-burst-animation 375ms cubic-bezier(0,0,.58,1);
      -moz-context-properties: fill;
      fill: var(--tab-loading-fill);
    }

    &[bursting][notselectedsinceload]::before {
      animation-name: tab-burst-animation-light;
    }
  }

  @keyframes tab-burst-animation {
    0% {
      opacity: 0.4;
      transform: scale(1);
    }
    100% {
      opacity: 0;
      transform: scale(40);
    }
  }

  @keyframes tab-burst-animation-light {
    0% {
      opacity: 0.2;
      transform: scale(1);
    }
    100% {
      opacity: 0;
      transform: scale(40);
    }
  }
}

/* Width/height & margins apply on tab icon stack children */
.tab-throbber,
.tab-icon-pending,
.tab-icon-image,
.tab-sharing-icon-overlay,
.tab-icon-overlay {
  height: 16px;
  width: 16px;

  &:not([pinned]) {
    margin-inline-end: 5.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tab-throbber[busy] {
    background-image: url("chrome://browser/skin/tabbrowser/hourglass.svg");
    background-position: center;
    background-repeat: no-repeat;
    -moz-context-properties: fill;
    fill: currentColor;
    opacity: 0.4;
  }

  .tab-throbber[progress] {
    opacity: 0.8;
  }
}

@media (prefers-reduced-motion: no-preference) {
  :root[sessionrestored] .tab-throbber {
    &[busy] {
      position: relative;
      overflow: hidden;

      &::before {
        content: "";
        position: absolute;
        background-image: url("chrome://browser/skin/tabbrowser/loading.svg");
        background-position: left center;
        background-repeat: no-repeat;
        width: 480px;
        height: 100%;
        animation: tab-throbber-animation 1.05s steps(30) infinite;
        -moz-context-properties: fill;

        /* XXX: It would be nice to transition between the "connecting" color and the
           "loading" color (see the `.tab-throbber[progress]::before` rule below);
           however, that currently forces main thread painting. When this is fixed
           (after WebRender lands), we can do something like
           `transition: fill 0.333s, opacity 0.333s;` */

        fill: currentColor;
        opacity: 0.7;
      }

      &:-moz-locale-dir(rtl)::before {
        animation-name: tab-throbber-animation-rtl;
      }
    }

    &[progress]::before {
      fill: var(--tab-loading-fill);
      opacity: 1;
    }

    #TabsToolbar[brighttext] &[progress]:not([selected])::before {
      fill: var(--lwt-tab-loading-fill-inactive, #84c1ff);
    }
  }

  @keyframes tab-throbber-animation {
    0% { transform: translateX(0); }
    100% { transform: translateX(-100%); }
  }

  @keyframes tab-throbber-animation-rtl {
    0% { transform: translateX(0); }
    100% { transform: translateX(100%); }
  }
}

:root {
  --tab-sharing-icon-animation: 3s linear tab-sharing-icon-pulse infinite;
}

@keyframes tab-sharing-icon-pulse {
  0%, 16.66%, 83.33%, 100% {
    opacity: 0;
  }
  33.33%, 66.66% {
    opacity: 1;
  }
}

.tab-icon-image {
  -moz-context-properties: fill;
  fill: currentColor;

  &:not([src]),
  &:-moz-broken {
    content: url("chrome://global/skin/icons/defaultFavicon.svg");
  }

  &[sharing]:not([selected]) {
    animation: var(--tab-sharing-icon-animation);
    animation-delay: -1.5s;
  }
}

.tab-sharing-icon-overlay {
  position: relative;
  -moz-context-properties: fill;
  fill: rgb(224, 41, 29);
  animation: var(--tab-sharing-icon-animation);

  &[sharing="camera"] {
    list-style-image: url("chrome://browser/skin/notification-icons/camera.svg");
  }

  &[sharing="microphone"] {
    list-style-image: url("chrome://browser/skin/notification-icons/microphone.svg");
  }

  &[sharing="screen"] {
    list-style-image: url("chrome://browser/skin/notification-icons/screen.svg");
  }
}

.tab-icon-overlay {
  position: relative;

  &[crashed] {
    list-style-image: url("chrome://browser/skin/tabbrowser/crashed.svg");
  }

  &:not([crashed]) {
    &[soundplaying] {
      list-style-image: url("chrome://browser/skin/tabbrowser/tab-audio-playing-small.svg");
    }

    &[muted] {
      list-style-image: url("chrome://browser/skin/tabbrowser/tab-audio-muted-small.svg");
    }

    &[activemedia-blocked] {
      list-style-image: url("chrome://browser/skin/tabbrowser/tab-audio-blocked-small.svg");
    }

    &:is([soundplaying], [muted], [activemedia-blocked]) {
      border-radius: 10px;
      -moz-context-properties: fill, fill-opacity, stroke;
      fill: currentColor;
      stroke: transparent;

      &:is([pinned], [sharing]):hover {
        background-color: var(--tab-icon-overlay-stroke, light-dark(white, black));
      }
    }

    &:is([pinned], [sharing]) {
      top: -5.5px;
      inset-inline-end: -6px;
      z-index: 1; /* Overlay tab title */
      padding: 2px;
      stroke: var(--tab-icon-overlay-stroke, light-dark(white, black));
      color: var(--tab-icon-overlay-fill, light-dark(black, white));
    }
  }

  &[indicator-replaces-favicon] {
    border-radius: 2px;
    fill-opacity: 0.75;
    padding: 2px;

    &:hover {
      background-color: color-mix(in srgb, currentColor 15%, transparent);
      fill-opacity: 0.95;
    }

    &:hover:active {
      background-color: color-mix(in srgb, currentColor 30%, transparent);
    }
  }

  :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: 0;
  }
}

.tab-label {
  margin-inline: 0;
}

.tab-close-button {
  -moz-context-properties: fill, fill-opacity;
  margin-inline-end: calc(var(--inline-tab-padding) / -2);
  width: 24px;
  height: 24px;
  padding: 6px;
  border-radius: var(--tab-border-radius);
  list-style-image: url(chrome://global/skin/icons/close-12.svg);
}

/* The following rulesets allow showing more of the tab title */
.tabbrowser-tab:not([labelendaligned], :hover) > .tab-stack > .tab-content > .tab-close-button {
  padding-inline-start: 0;
  width: 18px;
}

.tabbrowser-tab[visuallyselected]:not([labelendaligned]):hover,
#tabbrowser-tabs:not([closebuttons=activetab]) > #tabbrowser-arrowscrollbox > .tabbrowser-tab:not([visuallyselected], [labelendaligned]):hover {
  --tab-label-mask-size: 1em;
}


#tabbrowser-tabs:not([secondarytext-unsupported]) .tab-label-container {
  height: 2.7em;
}

.tab-secondary-label {
  font-size: .75em;
  opacity: .8;

  #tabbrowser-tabs[secondarytext-unsupported] & {
    display: none;
  }

  &[soundplaying-scheduledremoval]:not([muted]):not(:hover) {
    transition: opacity .3s linear var(--soundplaying-removal-delay);
    opacity: 0;
  }
}

.tab-icon-sound-label {
  /* Set height back to equivalent of parent's 1em based
     on the .tab-icon-sound having a reduced font-size */
  height: 1.3333em;
  white-space: nowrap;
  margin: 0;
}

.tab-background {
  border-radius: var(--tab-border-radius);
  margin-block: var(--tab-block-margin);
  min-height: var(--tab-min-height);
}

/* Selected tab and tab hover */

#TabsToolbar #firefox-view-button:hover:not([open]) > .toolbarbutton-icon,
.tabbrowser-tab:hover > .tab-stack > .tab-background:not([selected], [multiselected]) {
  background-color: color-mix(in srgb, currentColor 11%, transparent);
}

#TabsToolbar #firefox-view-button[open] > .toolbarbutton-icon,
#tabbrowser-tabs:not([noshadowfortests]) .tab-background:is([selected], [multiselected]) {
  box-shadow: 0 0 4px rgba(0,0,0,.4);
}

#TabsToolbar #firefox-view-button[open] > .toolbarbutton-icon,
.tab-background:is([selected], [multiselected]) {
  background-color: var(--tab-selected-bgcolor);
  background-origin: border-box;
  background-repeat: repeat-x;
}

#TabsToolbar #firefox-view-button[open] > .toolbarbutton-icon,
.tabbrowser-tab:is([visuallyselected], [multiselected]) {
  color: var(--tab-selected-textcolor);
  color-scheme: var(--tab-selected-color-scheme);
}

@media (prefers-contrast) {
  #TabsToolbar #firefox-view-button:is([open], :hover):not(:focus-visible) > .toolbarbutton-icon,
  .tab-background[selected],
  .tabbrowser-tab:hover > .tab-stack > .tab-background {
    outline: 1px solid currentColor;
    outline-offset: -1px;
  }
}

@media not (prefers-contrast) {
  :root[lwtheme] #TabsToolbar #firefox-view-button[open]:not(:focus-visible) > .toolbarbutton-icon,
  :root[lwtheme] .tab-background[selected]:not([multiselected]) {
    outline: 1px solid var(--lwt-tab-line-color, var(--lwt-tabs-border-color, currentColor));
    outline-offset: -1px;
  }
}

/* Add a focus outline on top of the multiselected tabs, with the currently selected
   tab getting a slightly thicker outline. */
.tab-background[multiselected] {
  outline: 1px solid var(--focus-outline-color);
  outline-offset: -1px;

  &[selected] {
    outline-width: 2px;
    outline-offset: -2px;
  }
}

/* Pinned tabs */

.tabbrowser-tab:is([image], [pinned]) > .tab-stack > .tab-content[attention]:not([selected]),
.tabbrowser-tab > .tab-stack > .tab-content[pinned][titlechanged]:not([selected]),
#firefox-view-button[attention] {
  background-image: radial-gradient(circle, var(--attention-dot-color), var(--attention-dot-color) 2px, transparent 2px);
  background-position: center bottom 6.5px;
  background-size: 4px 4px;
  background-repeat: no-repeat;
}

.tabbrowser-tab[image] > .tab-stack > .tab-content[attention]:not([pinned], [selected]) {
  background-position-x: left 14px;

  &:-moz-locale-dir(rtl) {
    background-position-x: right 14px;
  }
}

#tabbrowser-tabs[haspinnedtabs]:not([positionpinnedtabs]) > #tabbrowser-arrowscrollbox > .tabbrowser-tab:nth-child(1 of :not([pinned], [hidden])) {
  /* Add a gap between the last pinned tab and the first visible tab */
  margin-inline-start: 12px !important; /* .tabbrowser-tab sets margin: 0 !important; */
}

.tab-label[attention]:not([selected]) {
  font-weight: bold;
}

/* Tab Overflow */

#tabbrowser-arrowscrollbox {
  &:not([scrolledtostart])::part(overflow-start-indicator),
  &:not([scrolledtoend])::part(overflow-end-indicator) {
    width: 7px; /* The width is the sum of the inline margins */
    background-image: radial-gradient(ellipse at bottom,
                                      rgba(0,0,0,0.1) 0%,
                                      rgba(0,0,0,0.1) 7.6%,
                                      rgba(0,0,0,0) 87.5%);
    background-repeat: no-repeat;
    background-position: -3px;
    border-left: .5px solid rgba(255,255,255,.2);
    pointer-events: none;
    position: relative;
    border-bottom: .5px solid transparent;
  }

  &:not([scrolledtostart])::part(overflow-start-indicator) {
    margin-inline: -.5px -6.5px;
  }

  &:not([scrolledtoend])::part(overflow-end-indicator) {
    margin-inline: -6.5px -.5px;
  }

  &:-moz-locale-dir(rtl)::part(overflow-start-indicator),
  &:-moz-locale-dir(ltr)::part(overflow-end-indicator) {
    transform: scaleX(-1);
  }

  &[scrolledtostart]::part(overflow-start-indicator),
  &[scrolledtoend]::part(overflow-end-indicator) {
    opacity: 0;
  }

  &::part(overflow-start-indicator),
  &::part(overflow-end-indicator) {
    transition: opacity 150ms ease;
  }

  &::part(scrollbox-clip) {
    /* Needed to prevent tabstrip from growing as wide as the sum of the tabs'
       page-title widths when emulating XUL with modern flexbox. */
    contain: inline-size;
  }

  /* Scroll arrows */

  &::part(scrollbutton-up),
  &::part(scrollbutton-down) {
    appearance: none;
    background-clip: padding-box;
    border: 4px solid transparent;
    border-radius: calc(var(--tab-border-radius) + 4px);
    fill: var(--toolbarbutton-icon-fill);
    margin: 0;
    padding: 0 calc(var(--toolbarbutton-inner-padding) - 6px);
  }

  #navigator-toolbox:not(:hover) &:not([highlight])::part(scrollbutton-down) {
    transition: 1s background-color ease-out;
  }

  &[highlight]::part(scrollbutton-down) {
    background-color: SelectedItem;
  }

  &:not([scrolledtostart=true])::part(scrollbutton-up):hover,
  &:not([scrolledtoend=true])::part(scrollbutton-down):hover {
    background-color: var(--toolbarbutton-hover-background);
    color: inherit;
  }

  &:not([scrolledtostart=true])::part(scrollbutton-up):hover:active,
  &:not([scrolledtoend=true])::part(scrollbutton-down):hover:active {
    background-color: var(--toolbarbutton-active-background);
    color: inherit;
  }
}

/* Tab drag and drop */

.tab-drop-indicator {
  width: 12px;
  margin-inline-start: -12px;
  background: url(chrome://browser/skin/tabbrowser/tab-drag-indicator.svg) no-repeat center;
  position: relative;
  z-index: 2;
  pointer-events: none;
}

/* Drag space */

.titlebar-spacer[type="pre-tabs"],
.titlebar-spacer[type="post-tabs"] {
  width: 40px;
}

@media (max-width: 500px) {
  .titlebar-spacer[type="post-tabs"] {
    display: none;
  }
}

/* Firefox View button and menu item */

:root:not([privatebrowsingmode], [firefoxviewhidden]) :is(toolbarbutton, toolbarpaletteitem) + #tabbrowser-tabs,
:root[privatebrowsingmode]:not([firefoxviewhidden]) :is(
  toolbarbutton:not(#firefox-view-button),
  toolbarpaletteitem:not(#wrapper-firefox-view-button)
) + #tabbrowser-tabs {
  border-inline-start: 1px solid color-mix(in srgb, currentColor 25%, transparent);
  padding-inline-start: calc(var(--tab-overflow-pinned-tabs-width) + 2px);
  margin-inline-start: 2px;
}

:root[privatebrowsingmode] :is(#firefox-view-button, #menu_openFirefoxView) {
  display: none;
}

toolbar:not(#TabsToolbar) #firefox-view-button {
  background-position: top 25% right 25%;

  /* RTL notification dot */
  &:-moz-locale-dir(rtl) {
    background-position-x: left 25%;
  }
}

:is(#widget-overflow-mainView, #widget-overflow-fixed-list) #firefox-view-button {
  background-position: top 25% left 22px;

  &:-moz-locale-dir(rtl) {
    background-position-x: right 22px;
  }
}

/* New tab button */

#tabs-newtab-button,
#TabsToolbar #new-tab-button {
  list-style-image: url(chrome://global/skin/icons/plus.svg);
}

/* All tabs button and menupopup */

#alltabs-button {
  list-style-image: url(chrome://global/skin/icons/arrow-down.svg);
}

#tabbrowser-tabs[hiddensoundplaying] ~ #alltabs-button > .toolbarbutton-badge-stack > .toolbarbutton-badge {
  background: transparent url(chrome://browser/skin/tabbrowser/tab-audio-playing-small.svg);
  box-shadow: none;
  /* Match the color of the button, rather than label default. */
  color: inherit;
  display: block;
  -moz-context-properties: fill, fill-opacity, stroke;
  fill: currentColor;
  stroke: transparent;
  /* "!important" is necessary to override the rule in toolbarbutton.css */
  margin: -7px 0 0 !important;
  margin-inline-end: -4px !important;
  min-width: 12px;
  min-height: 12px;
}

/* The list of tabs is in its own panel-subview-body which will scroll. We don't
   want any padding below the scrollbar, so remove the bottom padding
   from the outer panel-subview-body. */
#allTabsMenu-allTabsView > .panel-subview-body {
  padding-bottom: 0;
}

#allTabsMenu-allTabsView-tabs {
  padding-top: 0;
}

.all-tabs-item {
  margin-inline: var(--arrowpanel-menuitem-margin-inline);
  border-radius: var(--arrowpanel-menuitem-border-radius);

  &[selected] {
    font-weight: bold;
  }

  > toolbarbutton {
    margin: 0;

    &:hover {
      background-color: var(--panel-item-hover-bgcolor);
    }

    &:hover:active {
      background-color: var(--panel-item-active-bgcolor);
    }

    &.all-tabs-container-indicator {
      position: relative;
      &::before {
        content: "";
        position: absolute;
        inset: 2px -3px;
        background: var(--identity-tab-color);
        width: 2px;
      }
    }
  }
}

.all-tabs-button {
  list-style-image: url("chrome://global/skin/icons/defaultFavicon.svg");
}

.all-tabs-secondary-button {
  -moz-context-properties: fill;
  fill: currentColor;

  > label {
    display: none !important; /* override panelUI-shared.css */
  }

  &:hover {
    opacity: 1;
  }
}

.all-tabs-mute-button[soundplaying] {
  list-style-image: url(chrome://global/skin/media/audio.svg);
}

.all-tabs-mute-button[muted] {
  list-style-image: url(chrome://global/skin/media/audio-muted.svg);
}

.all-tabs-close-button {
  list-style-image: url(chrome://global/skin/icons/close-12.svg);

  > .toolbarbutton-icon {
    margin-inline: 2px !important; /* override panelUI-shared.css */
  }
}

.tab-throbber-tabslist {
  height: 16px;
  width: 16px;

  @media (prefers-reduced-motion: reduce) {
    &[busy] {
      list-style-image: url("chrome://browser/skin/tabbrowser/hourglass.svg");
      -moz-context-properties: fill;
      fill: currentColor;
      opacity: 0.4;
    }

    &[progress] {
      opacity: 0.8;
    }
  }

  @media (prefers-reduced-motion: no-preference) {
    &[busy] {
      list-style-image: image-set(
        url("chrome://browser/skin/tabbrowser/tab-connecting.png"),
        url("chrome://browser/skin/tabbrowser/tab-connecting@2x.png") 2x
      );
    }

    &[progress] {
      list-style-image: image-set(
        url("chrome://browser/skin/tabbrowser/tab-loading.png"),
        url("chrome://browser/skin/tabbrowser/tab-loading@2x.png") 2x
      );

      /* FIXME: This should probably also apply in regular dark mode? */
      :root[lwt-popup="dark"] &[progress]:not([selected]) {
        list-style-image: image-set(
          url("chrome://browser/skin/tabbrowser/tab-loading-inverted.png"),
          url("chrome://browser/skin/tabbrowser/tab-loading-inverted@2x.png") 2x
        );
      }
    }
  }
}