/* 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/. */

/* Avoid adding ID selector rules in this style sheet, since they could
 * inadvertently match elements in the article content. */

:root {
  --grey-90-a10: rgba(12, 12, 13, 0.1);
  --grey-90-a20: rgba(12, 12, 13, 0.2);
  --grey-30: #d7d7db;
  --light-theme-background: #fff;
  --light-theme-foreground: rgb(21, 20, 26);
  --dark-theme-background: rgb(28, 27, 34);
  --dark-theme-foreground: rgb(251, 251, 254);
  --body-padding: 64px;
  --font-size: 12;
  --content-width: 22em;
  --line-height: 1.6em;
}

body {
  --main-background: var(--light-theme-background);
  --main-foreground: var(--light-theme-foreground);
  --primary-color: rgb(0, 97, 224);
  --toolbar-border: var(--grey-90-a20);
  --toolbar-transparent-border: transparent;
  --toolbar-box-shadow: var(--grey-90-a10);
  --toolbar-button-background: transparent;
  --toolbar-button-background-hover: rgba(207, 207, 216, 0.66);
  --toolbar-button-foreground-hover: var(--icon-fill);
  --toolbar-button-background-active: rgb(207, 207, 216);
  --toolbar-button-foreground-active: var(--primary-color);
  --toolbar-button-border: transparent;
  --toolbar-button-border-hover: var(--toolbar-button-border);
  --toolbar-button-border-active: var(--toolbar-button-border);
  --tooltip-background: var(--toolbar-button-background-active);
  --tooltip-foreground: var(--icon-fill);
  --tooltip-border: transparent;
  --popup-background: #fff;
  --popup-border: rgba(0, 0, 0, 0.12);
  --opaque-popup-border: rgb(224, 224, 224);
  --popup-line: var(--grey-30);
  --popup-shadow: rgba(49, 49, 49, 0.3);
  --popup-button-background: rgba(207, 207, 216, 0.33);
  --popup-button-foreground: var(--main-foreground);
  --popup-button-background-hover: var(--toolbar-button-background-hover);
  --popup-button-foreground-hover: var(--main-foreground);
  --popup-button-background-active: var(--toolbar-button-background-active);
  --popup-button-border: var(--popup-border);
  --selected-background: rgba(0, 97, 224, 0.3);
  --selected-border: var(--primary-color);
  --outline-focus-color: var(--primary-color);
  --font-value-background: rgb(240, 240, 244);
  --font-value-border: var(--grey-30);
  --icon-fill: rgb(91, 91, 102);
  --icon-disabled-fill: rgba(91, 91, 102, 0.4);
  --text-selected-background: var(--selected-background);
  --text-selected-foreground: inherit;
  --link-foreground: var(--primary-color);
  --link-selected-background: var(--selected-background);
  --link-selected-foreground: #333;
  --visited-link-foreground: #b5007f;
  /* light colours */
}

body.sepia {
  --main-background: rgb(244, 236, 216);
  --main-foreground: rgb(91, 70, 54);
  --toolbar-border: var(--main-foreground);
  --icon-fill: var(--main-foreground);
  --icon-disabled-fill: rgba(91, 70, 54, 0.4);
}

body.dark {
  --main-background: var(--dark-theme-background);
  --main-foreground: var(--dark-theme-foreground);
  --primary-color: rgb(0, 221, 255);
  --toolbar-border: rgba(249, 249, 250, 0.2);
  --toolbar-box-shadow: black;
  --toolbar-button-background-hover: rgb(82, 82, 94);
  --toolbar-button-background-active: rgb(91, 91, 102);
  --popup-background: rgb(66, 65, 77);
  --opaque-popup-border: #434146;
  --popup-line: rgba(249, 249, 250, 0.1);
  --popup-button-background: rgb(43, 42, 51);
  --selected-background: rgba(0, 221, 255, 0.3);
  --font-value-background: rgba(249, 249, 250, 0.15);
  --font-value-border: #656468;
  --icon-fill: rgb(251, 251, 254);
  --icon-disabled-fill: rgba(251, 251, 254, 0.4);
  --link-selected-foreground: #fff;
  --visited-link-foreground: #e675fd;
  /* dark colours */
}

body.hcm {
  --main-background: Canvas;
  --main-foreground: CanvasText;
  --primary-color: SelectedItem;
  --toolbar-border: CanvasText;
   /* We need a true transparent but in HCM this would compute to an actual color,
      so select the page's background color instead: */
  --toolbar-transparent-border: Canvas;
  --toolbar-box-shadow: Canvas;
  --toolbar-button-background: ButtonFace;
  --toolbar-button-background-hover: SelectedItem;
  --toolbar-button-foreground-hover: SelectedItemText;
  --toolbar-button-background-active: SelectedItemText;
  --toolbar-button-foreground-active: SelectedItem;
  --toolbar-button-border: ButtonText;
  --toolbar-button-border-hover: SelectedItemText;
  --toolbar-button-border-active: SelectedItem;
  --tooltip-background: Canvas;
  --tooltip-foreground: CanvasText;
  --tooltip-border: CanvasText;
  --popup-background: Canvas;
  --popup-border: CanvasText;
  --opaque-popup-border: CanvasText;
  --popup-line: CanvasText;
  --popup-button-background: ButtonFace;
  --popup-button-foreground: ButtonText;
  --popup-button-background-hover: ButtonText;
  --popup-button-foreground-hover: ButtonFace;
  --popup-button-background-active: ButtonText;
  --popup-button-border: ButtonText;
  --selected-background: Canvas;
  --outline-focus-color: CanvasText;
  --font-value-background: Canvas;
  --font-value-border: CanvasText;
  --icon-fill: ButtonText;
  --icon-disabled-fill: GrayText;
  --text-selected-background: SelectedItem;
  --text-selected-foreground: SelectedItemText;
  --link-foreground: LinkText;
  --link-selected-background: SelectedItem;
  --link-selected-foreground: SelectedItemText;
  --visited-link-foreground: VisitedText;
}

body {
  margin: 0;
  padding: var(--body-padding);
  background-color: var(--main-background);
  color: var(--main-foreground);
}

body.loaded {
  transition: color 0.4s, background-color 0.4s;
}

*::selection {
  background-color: var(--text-selected-background);
  color: var(--text-selected-foreground);
}

a {
  border-radius: 2px;
}

a::selection {
  background-color: var(--link-selected-background);
  color: var(--link-selected-foreground);
}

a:focus-visible {
  outline: 2px solid var(--outline-focus-color);
  outline-offset: 1px;
}

body.sans-serif {
  font-family: Helvetica, Arial, sans-serif;
}

body.serif {
  font-family: Georgia, "Times New Roman", serif;
}

/* Override some controls and content styles based on color scheme */

blockquote {
  border-inline-start: 2px solid var(--main-foreground) !important;
}

.light-button,
.auto-button {
  color: var(--light-theme-foreground);
  background-color: var(--light-theme-background);
}

@media (prefers-color-scheme: dark) {
  .auto-button {
    color: var(--dark-theme-foreground);
    background-color: var(--dark-theme-background);
  }
}

.dark-button {
  color: var(--dark-theme-foreground);
  background-color: var(--dark-theme-background);
}

.sepia-button {
  color: #5b4636;
  background-color: #f4ecd8;
}

/* Loading/error message */

.reader-message {
  margin-top: 40px;
  display: none;
  text-align: center;
  width: 100%;
  font-size: 0.9em;
}

/* Detector element to see if we're at the top of the doc or not. */
.top-anchor {
  position: absolute;
  top: 0;
  width: 0;
  height: 5px;
  pointer-events: none;
}

/* Header */

.header {
  text-align: start;
  display: none;
}

.domain {
  font-size: 0.9em;
  line-height: 1.48em;
  padding-bottom: 4px;
  font-family: Helvetica, Arial, sans-serif;
  text-decoration: underline var(--main-foreground) !important;
  color: var(--link-foreground);
}

.header > h1 {
  font-size: 1.6em;
  line-height: 1.25em;
  width: 100%;
  margin: 30px 0;
  padding: 0;
}

.header > .credits {
  font-size: 0.9em;
  line-height: 1.48em;
  margin: 0 0 10px;
  padding: 0;
  font-style: italic;
}

.header > .meta-data {
  font-size: 0.65em;
  margin: 0 0 15px;
}

.reader-estimated-time {
  text-align: match-parent;
}

/* Controls toolbar */

.toolbar-container {
  position: sticky;
  z-index: 2;
  top: 32px;
  height: 0; /* take up no space, so body is at the top. */

  /* As a stick container, we're positioned relative to the body. Move us to
   * the edge of the viewport using margins, and take the width of
   * the body padding into account for calculating our width.
   */
  margin-inline-start: calc(-1 * var(--body-padding));
  width: max(var(--body-padding), calc((100% - var(--content-width)) / 2 + var(--body-padding)));
  font-size: var(--font-size); /* Needed to ensure `em` units match, is reset for .reader-controls */
}

.toolbar {
  padding-block: 16px;
  border: 1px solid var(--toolbar-border);
  border-radius: 6px;
  box-shadow: 0 2px 8px var(--toolbar-box-shadow);

  width: 32px; /* basic width, without padding/border */

  /* padding should be 16px, except if there's not enough space for that, in
   * which case use half the available space for padding (=25% on each side).
   * The 34px here is the width + borders. We use a variable because we need
   * to know this size for the margin calculation.
   */
  --inline-padding: min(16px, calc(25% - 0.25 * 34px));
  padding-inline: var(--inline-padding);

  /* Keep a maximum of 96px distance to the body, but center once the margin
   * gets too small. We need to set the start margin, however...
   * To center, we'd want 50% of the container, but we'd subtract half our
   * own width (16px) and half the border (1px) and the inline padding.
   * When the other margin would be 96px, we want 100% - 96px - the complete
   * width of the actual toolbar (34px + 2 * padding)
   */
  margin-inline-start: max(calc(50% - 17px - var(--inline-padding)), calc(100% - 96px - 34px - 2 * var(--inline-padding)));

  font-family: Helvetica, Arial, sans-serif;
  list-style: none;
  user-select: none;

  /* Set focus outlines to the primary color without having to specify it
   * per each element. */
  accent-color: var(--primary-color);
}

@media (prefers-reduced-motion: no-preference) {
  .toolbar {
    transition-property: border-color, box-shadow;
    transition-duration: 250ms;
  }

  .toolbar .toolbar-button {
    transition-property: opacity;
    transition-duration: 250ms;
  }

  .toolbar-container.scrolled > .toolbar:not(:hover, :focus-within) {
    border-color: var(--toolbar-transparent-border);
    box-shadow: 0 2px 8px transparent;
  }

  .toolbar-container.scrolled > .toolbar:not(:hover, :focus-within) > .reader-controls:not(.dropdown-open) .toolbar-button {
    opacity: 0.6;
  }

  .toolbar-container.transition-location {
    transition-duration: 250ms;
    transition-property: width;
  }
}

.toolbar-container.overlaps .toolbar-button {
  opacity: 0.1;
}

.dropdown-open .toolbar {
  border-color: var(--toolbar-transparent-border);
  box-shadow: 0 2px 8px transparent;
}

.reader-controls {
  /* We use `em`s above this node to get it to the right size. However,
   * the UI inside the toolbar should use a fixed, smaller size. */
  font-size: 11px;
}

button {
  -moz-context-properties: fill;
  color: var(--main-foreground);
  fill: var(--icon-fill);
}

button:disabled {
  /* !important to override other uses of `fill` where the specificity there is greater. */
  fill: var(--icon-disabled-fill) !important;
}

.toolbar button::-moz-focus-inner {
  border: 0;
}

.toolbar-button {
  position: relative;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid var(--toolbar-button-border);
  border-radius: 4px;
  margin: 4px 0;
  background-color: var(--toolbar-button-background);
  background-size: 16px 16px;
  background-position: center;
  background-repeat: no-repeat;
}

.toolbar-button:hover {
  background-color: var(--toolbar-button-background-hover);
  border-color: var(--toolbar-button-border-hover);
  fill: var(--toolbar-button-foreground-hover);
}

.open .toolbar-button,
.toolbar-button:hover:active {
  background-color: var(--toolbar-button-background-active);
  color: var(--toolbar-button-foreground-active);
  border-color: var(--toolbar-button-border-active);
  fill: var(--toolbar-button-foreground-active);
}

.toolbar-button:focus-visible {
  outline: 2px solid var(--outline-focus-color);
  outline-offset: 2px;
}

.hover-label {
  position: relative;
  inset-inline-start: 36px;
  line-height: 16px;
  white-space: pre; /* make sure we don't wrap */
  background-color: var(--tooltip-background);
  color: var(--tooltip-foreground);
  padding: 4px 8px;
  border: 1px solid var(--tooltip-border);
  border-radius: 2px;
  visibility: hidden;
  pointer-events: none;
  /* Put above .dropdown .dropdown-popup, which has z-index: 1000. */
  z-index: 1001;
}

/* Show the hover tooltip on non-dropdown buttons. */
.toolbar-button:not(.dropdown-toggle):hover > .hover-label,
.toolbar-button:not(.dropdown-toggle):focus-visible > .hover-label,
/* Show the hover tooltip for dropdown buttons unless its dropdown is open. */
:not(.open) > li > .dropdown-toggle:hover > .hover-label,
:not(.open) > li > .dropdown-toggle:focus-visible > .hover-label {
  visibility: visible;
}

.dropdown {
  text-align: center;
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.dropdown li {
  margin: 0;
  padding: 0;
}

/* Popup */

.dropdown .dropdown-popup {
  text-align: start;
  position: absolute;
  inset-inline-start: 40px;
  z-index: 1000;
  background-color: var(--popup-background);
  visibility: hidden;
  border-radius: 4px;
  border: 1px solid var(--popup-border);
  box-shadow: 0 0 10px 0 var(--popup-shadow);
  top: 0;
}

.open > .dropdown-popup {
  visibility: visible;
}

.dropdown-arrow {
  position: absolute;
  height: 24px;
  width: 16px;
  inset-inline-start: -16px;
  background-image: url("chrome://global/skin/reader/RM-Type-Controls-Arrow.svg");
  display: block;
  -moz-context-properties: fill, stroke;
  fill: var(--popup-background);
  stroke: var(--opaque-popup-border);
  pointer-events: none;
}

.dropdown-arrow:dir(rtl) {
  transform: scaleX(-1);
}

/* Align the style dropdown arrow (narrate does its own) */
.style-dropdown .dropdown-arrow {
  top: 7px;
}

/* Font style popup */

.radio-button {
  /* We visually hide these, but we keep them around so they can be focused
   * and changed by interacting with them via the label, or the keyboard, or
   * assistive technology.
   */
  opacity: 0;
  pointer-events: none;
  position: absolute;
}

.radiorow,
.buttonrow {
  display: flex;
  align-content: center;
  justify-content: center;
}

.content-width-value,
.font-size-value,
.line-height-value {
  box-sizing: border-box;
  width: 36px;
  height: 20px;
  line-height: 20px;
  display: flex;
  justify-content: center;
  align-content: center;
  margin: auto;
  border-radius: 10px;
  border: 1px solid var(--font-value-border);
  background-color: var(--font-value-background);
}

.buttonrow > button {
  border: 0;
  height: 60px;
  width: 90px;
  background-color: transparent;
  background-repeat: no-repeat;
  background-position: center;
  fill: var(--popup-button-foreground);
}

.buttonrow > button:enabled:hover {
  background-color: var(--popup-button-background-hover);
  fill: var(--popup-button-foreground-hover);
}

.buttonrow > button:enabled:hover:active {
  background-color: var(--popup-button-background-active);
}

.buttonrow > button:enabled:focus-visible {
  outline: 2px solid var(--outline-focus-color);
  outline-offset: -2px;
}

.radiorow:not(:last-child),
.buttonrow:not(:last-child) {
  border-bottom: 1px solid var(--popup-line);
}

body.hcm .buttonrow.line-height-buttons {
  /* On HCM the .color-scheme-buttons row is hidden, so remove the border from the row above it */
  border-bottom: none;
}

.radiorow > label {
  position: relative;
  box-sizing: border-box;
  border-radius: 2px;
  border: 2px solid var(--popup-button-border);
}

.radiorow > label[checked] {
  border-color: var(--selected-border);
}

/* For the hover style, we draw a line under the item by means of a
 * pseudo-element. Because these items are variable height, and
 * because their contents are variable height, position it absolutely,
 * and give it a width of 100% (the content width) + 4px for the 2 * 2px
 * border width.
 */
.radiorow > input[type=radio]:focus-visible + label::after,
.radiorow > label:hover::after {
  content: "";
  display: block;
  border-bottom: 2px solid var(--selected-border);
  border-radius: 4px;
  width: calc(100% + 4px);
  position: absolute;
  /* to skip the 2 * 2px border + 2px spacing. */
  bottom: -6px;
  /* Match the start of the 2px border of the element: */
  inset-inline-start: -2px;
}

.font-type-buttons > label {
  height: 64px;
  width: 105px;
  /* Slightly more space between these items. */
  margin: 10px;
  /* Center the Sans-serif / Serif labels */
  text-align: center;
  background-size: 63px 39px;
  background-repeat: no-repeat;
  background-position: center 18px;
  background-color: var(--popup-button-background);
  color: var(--popup-button-foreground);
  fill: currentColor;
  -moz-context-properties: fill;
  /* This mostly matches baselines, but because of differences in font
   * baselines between serif and sans-serif, this isn't always enough. */
  line-height: 1;
  padding-top: 2px;
}

.font-type-buttons > label[checked] {
  background-color: var(--selected-background);
}

.sans-serif-button {
  font-family: Helvetica, Arial, sans-serif;
  background-image: url("chrome://global/skin/reader/RM-Sans-Serif.svg");
}

/* Tweak padding to match the baseline on mac */
:root[platform=macosx] .sans-serif-button {
  padding-top: 3px;
}

.serif-button {
  font-family: Georgia, "Times New Roman", serif;
  background-image: url("chrome://global/skin/reader/RM-Serif.svg");
}

body.hcm .color-scheme-buttons {
  /* Disallow selecting themes when HCM is on. */
  display: none;
}

.color-scheme-buttons > label {
  padding: 12px;
  height: 34px;
  font-size: 12px;
  /* Center the labels horizontally as well as vertically */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  /* We want 10px between items, but there's no margin collapsing in flexbox. */
  margin: 10px 5px;
}

.color-scheme-buttons > input:first-child + label {
  margin-inline-start: 10px;
}

.color-scheme-buttons > label:last-child {
  margin-inline-end: 10px;
}

/* Toolbar icons */

.close-button {
  background-image: url("chrome://global/skin/icons/close.svg");
}

.style-button {
  background-image: url("chrome://global/skin/reader/RM-Type-Controls-24x24.svg");
}

.minus-button {
  background-size: 18px 18px;
  background-image: url("chrome://global/skin/reader/RM-Minus-24x24.svg");
}

.plus-button {
  background-size: 18px 18px;
  background-image: url("chrome://global/skin/reader/RM-Plus-24x24.svg");
}

.content-width-minus-button {
  background-size: 42px 16px;
  background-image: url("chrome://global/skin/reader/RM-Content-Width-Minus-42x16.svg");
}

.content-width-plus-button {
  background-size: 44px 16px;
  background-image: url("chrome://global/skin/reader/RM-Content-Width-Plus-44x16.svg");
}

.line-height-minus-button {
  background-size: 34px 14px;
  background-image: url("chrome://global/skin/reader/RM-Line-Height-Minus-38x14.svg");
}

.line-height-plus-button {
  background-size: 34px 24px;
  background-image: url("chrome://global/skin/reader/RM-Line-Height-Plus-38x24.svg");
}

/* Mirror the line height buttons if the article is RTL. */
.reader-controls[articledir="rtl"] .line-height-minus-button,
.reader-controls[articledir="rtl"] .line-height-plus-button {
  transform: scaleX(-1);
}

@media print {
  .toolbar {
    display: none !important;
  }
}

/* Article content */

/* Note that any class names from the original article that we want to match on
 * must be added to CLASSES_TO_PRESERVE in ReaderMode.jsm, so that
 * Readability.js doesn't strip them out */

.container {
  margin: 0 auto;
  font-size: var(--font-size);
  max-width: var(--content-width);
  line-height: var(--line-height);
}

pre {
  font-family: inherit;
}

.moz-reader-content {
  display: none;
  font-size: 1em;
}

@media print {
  .moz-reader-content p,
  .moz-reader-content code,
  .moz-reader-content pre,
  .moz-reader-content blockquote,
  .moz-reader-content ul,
  .moz-reader-content ol,
  .moz-reader-content li,
  .moz-reader-content figure,
  .moz-reader-content .wp-caption {
    margin: 0 0 10px !important;
    padding: 0 !important;
  }
}

.moz-reader-content h1,
.moz-reader-content h2,
.moz-reader-content h3 {
  font-weight: bold;
}

.moz-reader-content h1 {
  font-size: 1.6em;
  line-height: 1.25em;
}

.moz-reader-content h2 {
  font-size: 1.2em;
  line-height: 1.51em;
}

.moz-reader-content h3 {
  font-size: 1em;
  line-height: 1.66em;
}

.moz-reader-content a:link {
  text-decoration: underline;
  font-weight: normal;
}

.moz-reader-content a:link,
.moz-reader-content a:link:hover,
.moz-reader-content a:link:active {
  color: var(--link-foreground);
}

.moz-reader-content a:visited {
  color: var(--visited-link-foreground);
}

.moz-reader-content * {
  max-width: 100%;
  height: auto;
}

.moz-reader-content p,
.moz-reader-content p,
.moz-reader-content code,
.moz-reader-content pre,
.moz-reader-content blockquote,
.moz-reader-content ul,
.moz-reader-content ol,
.moz-reader-content li,
.moz-reader-content figure,
.moz-reader-content .wp-caption {
  margin: -10px -10px 20px;
  padding: 10px;
  border-radius: 5px;
}

.moz-reader-content li {
  margin-bottom: 0;
}

.moz-reader-content li > ul,
.moz-reader-content li > ol {
  margin-bottom: -10px;
}

.moz-reader-content p > img:only-child,
.moz-reader-content p > a:only-child > img:only-child,
.moz-reader-content .wp-caption img,
.moz-reader-content figure img {
  display: block;
}

.moz-reader-content img[moz-reader-center] {
  margin-inline: auto;
}

.moz-reader-content .caption,
.moz-reader-content .wp-caption-text
.moz-reader-content figcaption {
  font-size: 0.9em;
  line-height: 1.48em;
  font-style: italic;
}

.moz-reader-content pre {
  white-space: pre-wrap;
}

.moz-reader-content blockquote {
  padding: 0;
  padding-inline-start: 16px;
}

.moz-reader-content ul,
.moz-reader-content ol {
  padding: 0;
}

.moz-reader-content ul {
  padding-inline-start: 30px;
  list-style: disc;
}

.moz-reader-content ol {
  padding-inline-start: 30px;
}

table,
th,
td {
  border: 1px solid currentColor;
  border-collapse: collapse;
  padding: 6px;
  vertical-align: top;
}

table {
  margin: 5px;
}

/* Visually hide (but don't display: none) screen reader elements */
.moz-reader-content .visually-hidden,
.moz-reader-content .visuallyhidden,
.moz-reader-content .sr-only {
  display: inline-block;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  border-width: 0;
}

/* Hide elements with common "hidden" class names */
.moz-reader-content .hidden,
.moz-reader-content .invisible {
  display: none;
}

/* Enforce wordpress and similar emoji/smileys aren't sized to be full-width,
 * see bug 1399616 for context. */
.moz-reader-content img.wp-smiley,
.moz-reader-content img.emoji {
  display: inline-block;
  border-width: 0;
  /* height: auto is implied from `.moz-reader-content *` rule. */
  width: 1em;
  margin: 0 .07em;
  padding: 0;
}

.reader-show-element {
  display: initial;
}

/* Provide extra spacing for images that may be aided with accompanying element such as <figcaption> */
.moz-reader-block-img:not(:last-child) {
  margin-block-end: 12px;
}

.moz-reader-wide-table {
  overflow-x: auto;
  display: block;
}

pre code {
  background-color: var(--main-background);
  border: 1px solid var(--main-foreground);
  display: block;
  overflow: auto;
}