mkdocs-material/src/assets/stylesheets/extensions/pymdown/_tasklist.scss

////
/// Copyright (c) 2016-2017 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
// ----------------------------------------------------------------------------

// Scoped in typesetted content to match specificity of regular content
.md-typeset {

  // Remove list icon on task items
  .task-list-item {
    position: relative;
    list-style-type: none;

    // Make checkbox items align with normal list items, but position
    // everything in ems for correct layout at smaller font sizes
    [type="checkbox"] {
      position: absolute;
      top: 0.45em;
      left: -2em;
    }
  }

  // Wrapper for list controls, in case custom checkboxes are enabled
  .task-list-control {

    // Checkbox icon in unchecked state
    .task-list-indicator::before {
      @extend %md-icon;

      position: absolute;
      top: 0.05em;
      left: -1.25em;
      color: $md-color-black--lighter;
      font-size: 1.5em;
      content: "\E835"; // check_box_outline_blank
      vertical-align: -0.25em;
    }

    // Checkbox icon in checked state
    [type="checkbox"]:checked + .task-list-indicator::before {
      content: "\E834"; // check_box
    }

    // Hide original checkbox behind icon
    [type="checkbox"] {
      opacity: 0;
      z-index: -1;
    }
  }
}