GPP Offside canvas CSS with vars

offside.css

/* offside-js 1.3.1 22-05-2016
* Minimal JavaScript kit without library dependencies to push things off-canvas using just class manipulation
* https://github.com/toomuchdesign/offside.git
*
* by Andrea Carraro
* Available under the MIT license
*/

/* Off-canvas element CSS */
:root {
    --offcanvas-width: 265px;
}
.main-navigation.offside {
    position: fixed; /* Does not play well with some old browsers (see: README) */
    width: var(--offcanvas-width);
    height: 100%;
	height: 100vh;
    top: 0;
    z-index: 9999;
    overflow: auto;
    -webkit-overflow-scrolling: touch; /* enables momentum scrolling in iOS overflow elements */
}

/* Left off-canvas elements default status: out of the page */
.offside,
.offside--left {
    left: calc( -1 * var(--offcanvas-width) );
}

/* Right off-canvas elements default status: out of the page */
.offside--right {
    left: auto;
    right: calc( -1 * var(--offcanvas-width) );
}

/*
 * Left off-canvas element is open:
 * - off-canvas element slides in
 * - container elements slides out
 */
.offside--left.is-open,
.offside-js--is-left .offside-sliding-element {
    transform: translate3d(var(--offcanvas-width), 0, 0);
}

/*
 * Right off-canvas element is open:
 * - off-canvas element slides in
 * - container elements slides out
 */
.offside--right.is-open,
.offside-js--is-right .offside-sliding-element {
    transform: translate3d(calc( -1 * var(--offcanvas-width) ), 0, 0);
}

/* Elements Transitions */
.offside-js--interact .offside,
.offside-js--interact .offside-sliding-element {
    transition: transform .2s cubic-bezier(.16, .68, .43, .99);

    /* improves performance issues on mobile*/
    -webkit-backface-visibility: hidden;
    -webkit-perspective: 1000;
}

/* Body overflow */
.offside-js--init {
    overflow-x: hidden;
}

/* Fallback movements for browser not supporting CSS 3d Transitions
----------------------------------------------- */

/* Modernizr false negative csstransforms3d fix, reset CSS 3d Transitions */
.no-csstransforms3d .offside {
    transform: translate3d(0, 0, 0);
}

.no-csstransforms3d .offside-sliding-element {
    overflow-x: hidden;
    position: relative;
}

/* Element is open: off-canvas element slides in */
.no-csstransforms3d .offside--left.is-open {
    left: 0;
}

.no-csstransforms3d .offside--right.is-open {
    right: 0;
}

/* Element is open: container elements slide out */
.no-csstransforms3d > .offside-js--is-left .offside-sliding-element {
    right: calc( -1 * var(--offcanvas-width) );
}

.no-csstransforms3d > .offside-js--is-right .offside-sliding-element {
    left: calc( -1 * var(--offcanvas-width) );
}

/* GP */
.slideout-overlay {
    z-index: 100000;
    position: fixed;
    width: 100%;
	height: 100%;
	height: 100vh;
	min-height: 100%; /* Safari */
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
    background-color: rgba(0,0,0,0.8);
    visibility: hidden;
    opacity: 0;
    cursor: pointer;
    transition: visibility .2s ease, opacity .2s ease;
}

.offside-js--is-open .slideout-overlay {
    visibility: visible;
    opacity: 1;
}

.slideout-overlay button.slideout-exit {
	position: fixed;
	top: 0;
	background-color: transparent;
	color: #fff;
	font-size: 30px;
	border: 0;
	opacity: 0;
}

.slide-opened .slideout-overlay button.slideout-exit {
	opacity: 1;
}

button.slideout-exit:hover {
	background-color: transparent;
}

.slideout-navigation button.slideout-exit {
    background: transparent;
    width: 100%;
    text-align: left;
    padding-top: 20px;
	padding-bottom: 20px;
	box-sizing: border-box;
	border: 0;
}

.slide-opened nav.toggled .menu-toggle:before {
	content: "\f0c9";
}

.offside-js--is-left.slide-opened .slideout-overlay button.slideout-exit {
    left: calc( var(--offcanvas-width) - 5px );
}

.offside-js--is-right.slide-opened .slideout-overlay button.slideout-exit {
    right: calc( var(--offcanvas-width) - 5px );
}

.slideout-widget {
	margin: 20px;
}

.slideout-navigation .main-nav,
.slideout-navigation .slideout-widget:not(:last-child) {
	margin-bottom: 40px;
}

.slideout-navigation:not(.do-overlay) .main-nav {
	width: 100%;
	box-sizing: border-box;
}

.slideout-navigation .mega-menu > ul > li {
	display: block;
	width: 100% !important;
}

.slideout-navigation .slideout-menu {
	display: block;
}

#generate-slideout-menu {
	z-index: 100001;
}

#generate-slideout-menu .slideout-menu li{
	float: none;
	width: 100%;
	clear: both;
	text-align: left;
}

.slideout-navigation .slideout-widget li {
	float: none;
}

#generate-slideout-menu.do-overlay li {
	text-align: center;
}

#generate-slideout-menu.main-navigation ul ul {
	display: none;
}

#generate-slideout-menu.main-navigation ul ul.toggled-on {
	display: block !important;
}

#generate-slideout-menu .slideout-menu li:hover > ul,
#generate-slideout-menu .slideout-menu li.sfHover > ul {
	display: none;
}

#generate-slideout-menu.main-navigation .main-nav ul ul {
	position: relative;
	top: 0;
	left: 0;
	width: 100%;
}

.slideout-toggle:not(.has-svg-icon) a:before {
	content: "\f0c9";
	font-family: 'GP Premium';
	line-height: 1em;
	width: 1.28571429em;
	text-align: center;
	display: inline-block;
	position: relative;
	top: 1px;
}

.slide-opened .slideout-exit:not(.has-svg-icon):before,
.slideout-navigation button.slideout-exit:not(.has-svg-icon):before {
	content: "\f00d";
	font-family: 'GP Premium';
	line-height: 1em;
	width: 1.28571429em;
	text-align: center;
	display: inline-block;
}

#generate-slideout-menu li.menu-item-float-right {
	float: none !important;
	display: inline-block;
	width: auto;
}

.rtl .slideout-navigation {
	position: fixed;
}

.slideout-navigation .menu-item-has-children .dropdown-menu-toggle {
    float: right;
}

.slideout-navigation .slideout-widget .menu li {
    float: none;
}

.slideout-navigation .slideout-widget ul {
	display: block;
}

/* Overlay */

.slideout-navigation.do-overlay {
    transform: none;
    transition: opacity 0.2s, visibility 0.2s;
    width: 100%;
    visibility: hidden;
    opacity: 0;
    text-align: center;
	left: 0;
	right: 0;
	pointer-events: none;
}

.slideout-navigation.do-overlay.is-open {
    opacity: 1;
	visibility: visible;
	pointer-events: auto;
}

.slideout-navigation.do-overlay .inside-navigation {
	display: flex;
	flex-direction: column;
	padding: 10% 10% 0;
	max-width: 700px;
}

.slideout-navigation.do-overlay .inside-navigation .main-nav,
.slideout-navigation.do-overlay .inside-navigation .slideout-widget {
    margin-left: auto;
    margin-right: auto;
    min-width: 250px;
}

.slideout-navigation.do-overlay .slideout-exit {
    position: fixed;
    right: 0;
    top: 0;
    width: auto;
    font-size: 25px;
}

.slideout-navigation.do-overlay .slideout-menu li a {
	display: inline-block;
}

.slideout-navigation.do-overlay .slideout-menu li {
	margin-bottom: 5px;
}

#generate-slideout-menu.do-overlay .slideout-menu li,
.slideout-navigation.do-overlay .inside-navigation {
	text-align: center;
}

.slideout-navigation.do-overlay .menu-item-has-children .dropdown-menu-toggle {
	border-left: 1px solid rgba(0,0,0,0.07);
	padding: 0 10px;
	margin: 0 0 0 10px;
}

.slideout-navigation.do-overlay ul ul {
	box-shadow: 0 0 0;
}

.nav-aligned-right .slideout-navigation,
.nav-aligned-center .slideout-navigation {
	text-align: left;
}

.slideout-navigation .sfHover > a > .dropdown-menu-toggle > .gp-icon svg {
	transform: rotate(180deg);
}

.slideout-navigation .sub-menu .dropdown-menu-toggle .gp-icon svg {
	transform: rotate(0deg);
}

.slideout-mobile .main-navigation.toggled .main-nav > ul,
.slideout-both .main-navigation.toggled .main-nav > ul,
.slideout-desktop .main-navigation.toggled .main-nav li.slideout-toggle {
	display: none !important;
}

.slideout-mobile .has-inline-mobile-toggle #site-navigation.toggled,
.slideout-both .has-inline-mobile-toggle #site-navigation.toggled {
	margin-top: 0;
}

.sf-menu > li.slideout-toggle {
	float: right;
}

.gen-sidebar-nav .sf-menu > li.slideout-toggle {
	float: none;
}

.off-canvas-toggle-label {
	padding-left: 7px;
}

.gp-icon + .off-canvas-toggle-label {
	padding-left: 9px;
}

@media (max-width: 768px) {
	.slideout-overlay button.slideout-exit {
		font-size: 20px;
		padding: 10px;
	}

	.slideout-overlay {
		top: -100px;
		height: calc(100% + 100px);
		height: calc(100vh + 100px);
		min-height: calc(100% + 100px); /* Safari */
	}

	.slideout-navigation.do-overlay .slideout-exit {
		position: static;
		text-align: center;
	}
}