woocommerce/plugins/woocommerce-admin/client/navigation/style.scss

@import './stylesheets/variables';
@import './components/container/style';
@import './components/header/style';

.has-woocommerce-navigation {
	margin-top: -$admin-bar-height;

	#wpadminbar,
	#adminmenuwrap,
	#adminmenuback {
		display: none !important;
	}

	#woocommerce-embedded-navigation {
		position: fixed;
		top: 0;
		left: 0;
		width: $navigation-width;
		height: 100%;
		box-sizing: border-box;
		background-color: $gray-900;
		z-index: 1100; //Must be greater than z-index on .woocommerce-layout__header
	}

	.woocommerce-navigation__wrapper {
		overflow-y: auto;
		height: calc(100vh - #{$header-height});
	}

	.components-navigation {
		box-sizing: border-box;
	}

	&:not(.is-folded) {
		#wpcontent,
		#wpfooter {
			margin-left: $navigation-width;

			@media ( max-width: 960px ) {
				margin-left: 0;
			}
		}
	}

	&.is-folded {
		#wpcontent,
		#wpfooter {
			margin-left: 0;
		}

		.woocommerce-layout__header {
			margin-left: $header-height;
		}

		#woocommerce-embedded-navigation {
			width: $header-height;
			height: $header-height;

			.woocommerce-navigation-header {
				&.is-scrolled {
					box-shadow: $header-scroll-shadow;
				}

				> * {
					display: none;
				}
			}

			.woocommerce-navigation-header__site-icon {
				display: block;
			}

			.components-navigation {
				display: none;
			}
		}
	}
}