ptut-vhost/webpack/scss/menu.scss

$menu-bg: #163042;
$menu-width: 3em;
$menu-outer-width: #{$menu-width + 1em};

#side-menu{

	/* (1) Container
	---------------------------------------------------------*/
	display: flex;
	position: absolute;
		top: 0;
		left: 0;
		width: $menu-outer-width;
		height: 100%;

	background-color: $menu-bg;

	// flex properties
	flex-direction: column;
	justify-content: space-around;
	align-items: center;

	/* (2) Items
	---------------------------------------------------------*/
	.item{
		display: block;
		width: $menu-width;
		height: $menu-width;

		border-radius: 3px / 3px;

		// box-shadow: inset 0 0 5px darken($menu-bg, 6%);

		background: center center no-repeat;
		background-size: 50%;

		border: 1px solid lighten($menu-bg, 5%);

		transition: all .2s ease-in-out;

		cursor: pointer;

		/* (1) Set icons */
		&[data-icon='home']{   background-image: url('/asset/svg/home.svg@bebedd');   }
		&[data-icon='manage']{ background-image: url('/asset/svg/manage.svg@bebedd'); }
		&[data-icon='fiche']{  background-image: url('/asset/svg/fiche.svg@bebedd');  }
		&[data-icon='login']{  background-image: url('/asset/svg/login.svg@bebedd');  }
		&[data-icon='logout']{ background-image: url('/asset/svg/logout.svg@bebedd'); }

		/* (2) On hover */
		&:hover{ border: 1px solid lighten($menu-bg, 20%); }

		&[data-icon='home']:hover{   background-image: url('/asset/svg/home.svg@dfdfee');   }
		&[data-icon='manage']:hover{ background-image: url('/asset/svg/manage.svg@dfdfee'); }
		&[data-icon='fiche']:hover{  background-image: url('/asset/svg/fiche.svg@dfdfee');  }
		&[data-icon='login']:hover{  background-image: url('/asset/svg/login.svg@dfdfee');  }
		&[data-icon='logout']:hover{ background-image: url('/asset/svg/logout.svg@dfdfee'); }

		/* (3) Label */
		span{

			display: none;
			// display: block;
			position: absolute;
				margin-top: #{$menu-width / 4};
				left: calc( 100% + .5em );

			padding: .3em .7em;

			background-color: $menu-bg;

			color: #fff;

			border-radius: 3px / 3px;

		}

		/* (4) Display label on item hover */
		&:hover span{ display: block; }

	}

}