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////
/// Copyright (c) 2016-2023 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
// ----------------------------------------------------------------------------
// Sidebar
.md-sidebar {
position: sticky;
top: px2rem(48px);
flex-shrink: 0;
align-self: flex-start;
width: px2rem(242px);
padding: px2rem(24px) 0;
// [print]: Hide sidebar
@media print {
display: none;
}
// Primary sidebar with navigation
&--primary {
// [tablet -]: Show navigation as drawer
@include break-to-device(tablet) {
position: fixed;
top: 0;
z-index: 5;
display: block;
width: px2rem(242px);
height: 100%;
background-color: var(--md-default-bg-color);
transition:
transform 250ms cubic-bezier(0.4, 0, 0.2, 1),
box-shadow 250ms;
transform: translateX(0);
inset-inline-start: px2rem(-242px);
// Show sidebar when drawer is active
[data-md-toggle="drawer"]:checked ~ .md-container & {
box-shadow: var(--md-shadow-z3);
transform: translateX(px2rem(242px));
// Adjust for right-to-left languages
[dir="rtl"] & {
transform: translateX(px2rem(-242px));
}
}
// Stretch scroll wrapper for primary sidebar
.md-sidebar__scrollwrap {
position: absolute;
inset: 0;
margin: 0;
scroll-snap-type: none;
overflow: hidden;
}
}
}
// [screen +]: Show navigation as sidebar
@include break-from-device(screen) {
height: 0;
// [no-js]: Switch to native sticky behavior
.no-js & {
height: auto;
}
// Adjust spacing for sticky navigation tabs
.md-header--lifted ~ .md-container & {
top: px2rem(96px);
}
}
// Secondary sidebar with table of contents
&--secondary {
display: none;
order: 2;
// [tablet landscape +]: Show table of contents as sidebar
@include break-from-device(tablet landscape) {
height: 0;
// [no-js]: Switch to native sticky behavior
.no-js & {
height: auto;
}
// Sidebar is visible
&:not([hidden]) {
display: block;
}
// Ensure smooth scrolling on iOS
.md-sidebar__scrollwrap {
touch-action: pan-y;
}
}
}
// Sidebar scroll wrapper
&__scrollwrap {
margin: 0 px2rem(4px);
overflow-y: auto;
// Hack: promote to own layer to reduce jitter
backface-visibility: hidden;
// Hack: Chrome 81+ exhibits a strange bug, where it scrolls the container
// to the bottom if `scroll-snap-type` is set on the initial render. For
// this reason, we disable scroll snapping until this is resolved (#1667).
// scroll-snap-type: y mandatory;
scrollbar-width: thin;
scrollbar-gutter: stable;
scrollbar-color: var(--md-default-fg-color--lighter) transparent;
// Webkit scrollbar
&::-webkit-scrollbar {
width: px2rem(4px);
height: px2rem(4px);
}
// Sidebar scroll wrapper on focus/hover
&:is(:focus-within, :hover) {
scrollbar-color: var(--md-accent-fg-color) transparent;
// Webkit scrollbar thumb
&::-webkit-scrollbar-thumb {
background-color: var(--md-default-fg-color--lighter);
// Webkit scrollbar thumb on hover
&:hover {
background-color: var(--md-accent-fg-color);
}
}
}
}
// Hack: the scrollbar is only visible when the sidebar's contents overflow,
// which is nice, but leads to the problem where the chevrons of expandable
// sections will jump by `4px` when the sidebar is shown. We wanted to fix
// this problem for so long, but haven't found a clean way of doing it.
// Until now. The following declaration is only applied to Webkit browsers
// (e.g. Chrome and Safari), which support styling of scrollbars. The trick
// is to add conditional padding on the side of the scrollbar only if the
// sidebar's content doesn't overflow. This hack is inspired and adapted
// from Ayke van Laëthem's year old trick – see https://bit.ly/3Sb1qql
@supports selector(::-webkit-scrollbar) {
// Sidebar scroll wrapper
&__scrollwrap {
scrollbar-gutter: auto;
}
// Sidebar wrapper
&__inner {
padding-inline-end: calc(100% - #{px2rem(230px)});
}
}
}
// [tablet -]: Show overlay on active drawer
@include break-to-device(tablet) {
// Drawer overlay
.md-overlay {
position: fixed;
top: 0;
z-index: 5;
width: 0;
height: 0;
background-color: hsla(0, 0%, 0%, 0.54);
opacity: 0;
transition:
width 0ms 250ms,
height 0ms 250ms,
opacity 250ms;
// Show overlay when drawer is active
[data-md-toggle="drawer"]:checked ~ & {
width: 100%;
height: 100%;
opacity: 1;
transition:
width 0ms,
height 0ms,
opacity 250ms;
}
}
}
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