mkdocs-material/src/assets/stylesheets/layout/_clipboard.scss

////
/// Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>
///
/// Permission is hereby granted, free of charge, to any person obtaining a
/// copy of this software and associated documentation files (the "Software"),
/// to deal in the Software without restriction, including without limitation
/// the rights to use, copy, modify, merge, publish, distribute, sublicense,
/// and/or sell copies of the Software, and to permit persons to whom the
/// Software is furnished to do so, subject to the following conditions:
///
/// The above copyright notice and this permission notice shall be included in
/// all copies or substantial portions of the Software.
///
/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
/// FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
/// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
/// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
/// DEALINGS
////

// ----------------------------------------------------------------------------
// Rules
// ----------------------------------------------------------------------------

// Copy to clipboard
.md-clipboard {
  position: absolute;
  top: px2rem(6px);
  right: px2rem(6px);
  width: px2rem(28px);
  height: px2rem(28px);
  transition: color 250ms;
  border-radius: px2rem(2px);
  color: $md-color-black--lightest;
  font-size: px2rem(16px);
  cursor: pointer;
  z-index: 1;
  // Hack: put everything on the GPU to omit flickering
  backface-visibility: hidden;

  // Hide for print
  @media print {
    display: none;
  }

  // Show on container hover
  pre:hover &,
  .codehilite:hover & {
    color: $md-color-black--light;
  }

  // Focused or hovered icon
  pre &:focus,
  pre &:hover,
  .codehilite &:focus,
  .codehilite &:hover {
    color: $md-color-accent;
  }
}