gecko-dev/devtools/client/themes/inspector.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/. */

* {
  box-sizing: border-box;
}

/* Make sure to hide scroll bars for the parent window */
window {
  overflow: hidden;
}

/* The main Inspector panel container. */
.inspector-responsive-container {
  height: 100vh;
  overflow: hidden;
}

/* The main panel layout. This area consists of a toolbar, markup view
  and breadcrumbs bar. */
#inspector-main-content {
  /* Subtract 1 pixel from the panel height. It's puzzling why this
    is needed, but if not presented the entire Inspector panel
    content jumps 1 pixel up when the Toolbox is opened. */
  height: calc(100% - 1px);
  /* This min-width avoids a visual glitch when moving the splitter quickly to the left.
     See bug 1307408 comment #12. */
  min-width: 125px;
  display: flex;
  flex-direction: column;
}

/* Inspector Panel Splitter */

#inspector-splitter-box {
  height: 100vh;
  width: 100vw;
  position: fixed;
}

/* Minimum dimensions for the Inspector splitter areas. */
#inspector-splitter-box .uncontrolled,
#inspector-splitter-box .controlled {
  min-height: 50px;
  min-width: 50px;
  overflow-x: hidden;
}

/* Set a minimum width of 200px for tab content to avoid breaking the layout when resizing
   the sidebar tab to small width. If a specific panel supports smaller width, this should
   be overridden on a panel-by-panel basis */
.inspector-tabpanel {
  min-width: 200px;
}

#inspector-splitter-box .controlled.pane-collapsed {
  visibility: collapse;
}

#inspector-splitter-box .sidebar-toggle::before {
  background-image: url("chrome://devtools/skin/images/close-3-pane.svg");
  transform: unset;
}

#inspector-splitter-box .sidebar-toggle.pane-collapsed::before {
  background-image: url("chrome://devtools/skin/images/open-3-pane.svg");
}

/* Flip the icon horizontally when in RTL mode */
#inspector-splitter-box .sidebar-toggle:dir(rtl) {
  transform: scaleX(-1);
}

#inspector-searchlabel-container {
  display: flex;
}

#inspector-searchlabel-container[hidden] {
  display: none;
}

#inspector-searchlabel {
  padding: 0 3px;
}

/* Add element toolbar button */
#inspector-element-add-button::before {
  background-image: url("chrome://devtools/skin/images/add.svg");
  background-position: center;
  background-size: 14px;
  -moz-user-focus: normal;
}

/* Eyedropper toolbar button */

#inspector-eyedropper-toggle {
  /* Required to display tooltip when eyedropper is disabled in non-HTML documents */
  pointer-events: auto;
}

#inspector-eyedropper-toggle::before {
  background-image: url(images/command-eyedropper.svg);
  background-position: center;
  background-size: 14px;
}

#inspector-breadcrumbs-toolbar {
  padding: 0px;
  border-bottom-width: 0px;
  border-top-width: 1px;
  border-top-color: var(--theme-splitter-color);
  /* Bug 1262668 - Use the same background as the body so the breadcrumbs toolbar doesn't
     get mistaken as a splitter */
  background-color: var(--theme-body-background);
  display: block;
  position: relative;
}

#inspector-breadcrumbs-toolbar,
#inspector-breadcrumbs-toolbar * {
  box-sizing: border-box;
  direction: ltr;
}

#inspector-breadcrumbs {
  display: flex;

  /* Break out of the XUL flexbox, so the splitter can still shrink the
     markup view even if the contents of the breadcrumbs are wider than
     the new width. */
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
}

#inspector-breadcrumbs .scrollbutton-up,
#inspector-breadcrumbs .scrollbutton-down {
  flex: 0;
  display: flex;
  align-items: center;
}

#inspector-breadcrumbs .html-arrowscrollbox-inner {
  flex: 1;
  display: flex;
  overflow: hidden;
}

#inspector-breadcrumbs .breadcrumbs-widget-item {
  white-space: nowrap;
  flex-shrink: 0;
}

#inspector-rules-container,
#inspector-sidebar-container {
  overflow: hidden;
  position: relative;
  height: 100%;
}

#inspector-rules-sidebar,
#inspector-sidebar {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}

/* Override `-moz-user-focus:ignore;` from toolkit/content/minimal-xul.css */
.inspector-tabpanel > * {
  -moz-user-focus: normal;
}

/* Markup Box */

iframe {
  border: 0;
}

#markup-box {
  width: 100%;
  flex: 1;
  min-height: 0;
}

#markup-box > iframe {
  height: 100%;
  width: 100%;
}

/* Extension Sidebar */
.inspector-tabpanel.extension-sidebar {
  height: 100%;
  overflow-y: auto;
}