mkdocs-material/src/assets/stylesheets/layout/_base.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
////

// ----------------------------------------------------------------------------
// Variables
// ----------------------------------------------------------------------------

// Active (toggled) drawer
$md-toggle__drawer--checked:
  "[data-md-toggle=\"drawer\"]:checked ~";

// ----------------------------------------------------------------------------
// Rules: base grid and containers
// ----------------------------------------------------------------------------

// Stretch container to viewport and set base font-size to 10px for simple
// calculations base on relative ems (rems)
html {
  height: 100%;
  background-color: $md-color-white;
  // Hack: normally, we would set the base font-size to 62.5%, so we can base
  // all calculations on 10px, but Chromium and Chrome define a minimal font
  // size of 12 if the system language is set to Chinese. For this reason we
  // just double the font-size, set it to 20px which seems to do the trick.
  //
  // See https://github.com/squidfunk/mkdocs-material/issues/911
  font-size: 125%;
  // Hack: some browsers on some operating systems don't account for scroll
  // bars when firing media queries, so we need to do this for safety. This
  // currently impacts the table of contents component between 1220 and 1234px
  // and is to current knowledge not fixable.
  overflow-x: hidden;

  // [screen medium +]: Set base font-size to 11px
  @include break-from-device(screen medium) {
    font-size: 137.50%;
  }

  // [screen large +]: Set base font-size to 12px
  @include break-from-device(screen large) {
    font-size: 150%;
  }
}

// Stretch body to container and leave room for footer
body {
  display: flex;
  position: relative;
  flex-direction: column;
  width: 100%;
  min-height: 100%;
  // Hack: reset font-size to 10px, so the spacing for all inline elements is
  // correct again. Otherwise the spacing would be based on 20px.
  font-size: 0.5rem; // stylelint-disable-line unit-whitelist

  // [tablet portrait -]: Lock body to disable scroll bubbling
  @include break-to-device(tablet portrait) {

    // Lock body to viewport height (e.g. in search mode)
    &[data-md-state="lock"] {
      position: fixed;
    }
  }
}

// Horizontal separators
hr {
  display: block;
  height: px2rem(1px);
  padding: 0;
  border: 0;
}

// Template-wide grid
.md-grid {
  max-width: px2rem(1220px);
  margin-right: auto;
  margin-left: auto;
}

// Content wrapper
.md-container {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

// The main content should stretch to maximum height in the table
.md-main {
  flex-grow: 1;

  // Increase top spacing of content area to give typography more room
  &__inner {
    height: 100%;
    padding-top: px2rem(24px + 6px);
    // Hack: induce margin-collapse, because otherwise the sidebar height is
    // not calculated correctly and the overflow property on this element must
    // be left in initial state for targetted link offsets to work properly
    padding-bottom: px2rem(1px);
  }
}

// ----------------------------------------------------------------------------
// Rules: navigational elements
// ----------------------------------------------------------------------------

// Toggle checkbox
.md-toggle {
  display: none;
}

// Overlay below expanded drawer
.md-overlay {
  position: fixed;
  top: 0;
  width: 0;
  height: 0;
  transition:
    width     0ms 250ms,
    height    0ms 250ms,
    opacity 250ms;
  background-color: $md-color-black--light;
  opacity: 0;
  z-index: 3;

  // [tablet -]: Trigger overlay
  @include break-to-device(tablet) {

    // Expanded drawer
    #{$md-toggle__drawer--checked} & {
      width: 100%;
      height: 100%;
      transition:
        width     0ms,
        height    0ms,
        opacity 250ms;
      opacity: 1;
    }
  }
}

// ----------------------------------------------------------------------------
// Rules: flexible elements
// ----------------------------------------------------------------------------

// Flexible layout container
.md-flex {
  display: flex;

  // Flexible layout container cell/element
  &__cell {
    position: relative;

    // Shrink to minimum width
    &--shrink {
      flex-grow: 0;
    }

    // Stretch to maximum width
    &--stretch {
      flex-grow: 1;
    }
  }

  // Apply ellipsis in case of overflowing text
  &__ellipsis {
    text-overflow: ellipsis;
    white-space: nowrap;
    overflow: hidden;
  }
}

// ----------------------------------------------------------------------------
// Rules: skip link
// ----------------------------------------------------------------------------

// Skip link
.md-skip {
  position: fixed;
  width: px2rem(1px);
  height: px2rem(1px);
  margin: px2rem(10px);
  padding: px2rem(6px) px2rem(10px);
  transform: translateY(px2rem(8px));
  border-radius: px2rem(2px);
  background-color: $md-color-black;
  color: $md-color-white;
  font-size: ms(-1);
  opacity: 0;
  overflow: hidden;

  // Show skip link on focus
  &:focus {
    width: auto;
    height: auto;
    clip: auto;
    transform: translateX(0);
    transition:
      transform 250ms cubic-bezier(0.4, 0, 0.2, 1),
      opacity   175ms 75ms;
    opacity: 1;
    z-index: 10;
  }
}

// ----------------------------------------------------------------------------
// Rules: print styles
// ----------------------------------------------------------------------------

// Add margins to page
@page {
  margin: 25mm;
}