gecko-dev/devtools/client/themes/markup.css

/* 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/. */

:root {
  --markup-outline: var(--theme-splitter-color);
}

.theme-dark:root {
  --markup-outline: var(--theme-highlight-pink);
}

* {
  padding: 0;
  margin: 0;
}

:root {
  -moz-control-character-visibility: visible;
}

body {
  -moz-user-select: none;
}

/* Force height and width (possibly overflowing) from inline elements.
 * This allows long overflows of text or input fields to still be styled with
 * the container, rather than the background disappearing when scrolling */
#root {
  float: left;
  min-width: 100%;
}

/* Don't display a parent-child outline for the root elements */
#root > ul > li > .children {
  background: none;
}

body.dragging .tag-line {
  cursor: grabbing;
}

#root-wrapper:after {
   content: "";
   display: block;
   clear: both;
   position:relative;
}

.html-editor {
  display: none;
  position: absolute;
  z-index: 2;

  /* Use the same margin/padding trick used by .child tags to ensure that
   * the editor covers up any content to the left (including expander arrows
   * and hover effects). */
  margin-left: -1000em;
  padding-left: 1000em;
}

.html-editor-inner {
  border: solid .1px;
  flex: 1 1 auto;

  /* Keep the editor away from the markup view floating scrollbars */
  margin-inline-end: 12px;
}

.html-editor iframe {
  height: 100%;
  width: 100%;
  border: none;
  margin: 0;
  padding: 0;
}

.children {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* Tags are organized in a UL/LI tree and indented thanks to a left padding.
 * A very large padding is used in combination with a slightly smaller margin
 * to make sure childs actually span from edge-to-edge. */
.child {
  margin-left: -1000em;
  padding-left: 1001em;
}

/* Normally this element takes space in the layout even if it's position: relative
 * by adding height: 0 we let surrounding elements to fill the blank space */
.child.dragging {
  position: relative;
  pointer-events: none;
  opacity: 0.7;
  z-index: 1;
  height: 0;
}

/* Indicates a tag-line in the markup-view as being an active drop target by
 * drawing a horizontal line where the dragged element would be inserted if
 * dropped here */
.tag-line.drop-target::before,
.tag-line.drag-target::before {
  content: '';
  position: absolute;
  top: 0;
  width: 100%;
  /* Offset these by 1000px to make sure they cover the full width of the view */
  padding-left: 1000px;
  left: -1000px;
}

.tag-line.drag-target::before {
  border-top: 2px solid var(--theme-content-color2);
}

.tag-line.drop-target::before {
  border-top: 2px solid var(--theme-contrast-background);
}

/* In case the indicator is put on the closing .tag-line, the indentation level
 * will become misleading, so we push it forward to match the indentation level */
ul.children + .tag-line::before {
  margin-left: 14px;
}

.tag-line {
  min-height: 1.4em;
  line-height: 1.4em;
  position: relative;
  cursor: default;
  padding-left: 2px;
}

.tag-line[selected] + .children {
  background-image: linear-gradient(to top, var(--markup-outline), var(--markup-outline));
  background-repeat: no-repeat;
  /* Shorten the outline height by 4px to account for the 2px top padding and
   * allow for a 2px bottom padding */
  background-size: 1.5px calc(100% - 4px);
  /* Align the outline to under the expander arrow and provide 2px top
   * padding */
  background-position: -6px 2px;
  border-left: 6px solid transparent;
  margin-left: -6px;
}

.html-editor-container {
  position: relative;
  min-height: 200px;
}

/* This extra element placed in each tag is positioned absolutely to cover the
 * whole tag line and is used for background styling (when a selection is made
 * or when the tag is flashing) */
.tag-line .tag-state {
  position: absolute;
  left: -1000em;
  right: 0;
  height: 100%;
  z-index: 0;
}

.expander {
  display: inline-block;
  margin-left: -14px;
  vertical-align: middle;
  /* Make sure the expander still appears above the tag-state */
  position: relative;
  z-index: 1;
}

.child.collapsed .child, .child.collapsed .children {
  display: none;
}

.child > .tag-line:first-child .close {
  display: none;
}

.child.collapsed > .tag-line:first-child .close {
  display: inline;
}

.child.collapsed > .tag-line ~ .tag-line {
  display: none;
}

.child.collapsed .close {
  display: inline;
}

/* Hide HTML void elements (img, hr, br, …) closing tag when the element is not
 * expanded (it can be if it has pseudo-elements attached) */
.child.collapsed > .tag-line .void-element .close {
  display: none;
}

.closing-bracket {
  pointer-events: none;
}

.newattr {
  display: inline-block;
  width: 1em;
  height: 1ex;
  margin-right: -1em;
  padding: 1px 0;
}

.attr-value .link {
  text-decoration: underline;
}

.newattr:focus {
  margin-right: 0;
}

.flash-out {
  transition: background .5s;
}

.markupview-events {
  display: none;
  cursor: pointer;
}

.editor {
  /* Make sure the editor still appears above the tag-state */
  position: relative;
  z-index: 1;
}

.editor.text {
  display: inline-block;
}

.editor.text pre,
.editor.comment pre {
  font: inherit;
}

.more-nodes {
  padding-left: 16px;
}

.styleinspector-propertyeditor {
  border: 1px solid #CCC;
}

/* Draw a circle next to nodes that have a pseudo class lock.
   Center vertically with the 1.4em line height on .tag-line */
.child.pseudoclass-locked::before {
  content: "";
  background: var(--theme-highlight-lightorange);
  border-radius: 50%;
  width: .8em;
  height: .8em;
  margin-top: .3em;
  left: 1px;
  position: absolute;
  z-index: 1;
}

/* Firebug Theme */

.theme-firebug .theme-fg-color3 {
  color: var(--theme-graphs-full-blue);
}

.theme-firebug .open,
.theme-firebug .close,
.theme-firebug .attr-name.theme-fg-color2 {
  color: var(--theme-highlight-purple);
}

.theme-firebug .attr-value.theme-fg-color6 {
  color: var(--theme-highlight-red);
}

.theme-firebug .markupview-events {
  font-size: var(--theme-toolbar-font-size);
}

/* Selected nodes in the tree should have light selected text.
   theme-selected doesn't work in this case since the text is a
   sibling of the class, not a child. */
.theme-selected ~ .editor,
.theme-selected ~ .editor .theme-fg-color1,
.theme-selected ~ .editor .theme-fg-color2,
.theme-selected ~ .editor .theme-fg-color3,
.theme-selected ~ .editor .theme-fg-color4,
.theme-selected ~ .editor .theme-fg-color5,
.theme-selected ~ .editor .theme-fg-color6,
.theme-selected ~ .editor .theme-fg-color7 {
  color: var(--theme-selection-color);
}

/* Make sure even text nodes are white when selected in the Inspector panel. */
.theme-firebug .theme-selected ~ .editor .open,
.theme-firebug .theme-selected ~ .editor .close {
  color: var(--theme-selection-color);
}

/* In case a node isn't displayed in the page, we fade the syntax highlighting */
.not-displayed .open,
.not-displayed .close {
  opacity: .7;
}

/* Events */
.markupview-events {
  font-size: 8px;
  font-weight: bold;
  line-height: 10px;
  border-radius: 3px;
  padding: 0px 2px;
  margin-inline-start: 5px;
  -moz-user-select: none;
}

.markupview-events {
  background-color: var(--theme-body-color-alt);
  color: var(--theme-body-background);
}