lib/rotjs-library/manual/menu.css

#menu {
	position: fixed;
	left: 0px;
	top: 10px;
	z-index: 1;
}

#menu, #menu ul {
	margin: 0;
	padding: 0px;
	list-style-type: none;
	width: 180px;
}

#menu a, #menu h2 {
	display: block;
	text-decoration: none;
	padding-left: 16px;
	background-color: #000;
	line-height: 200%;
}

#menu h2 {
	margin: 0;
	text-align: center;
	text-transform: uppercase;
	padding-right: 16px;
	border-top-left-radius: 10px;
}

#menu a {
	position: relative;
	z-index: 1;
	outline-style: none;
}

#menu a.active:before {
	content: "●";
	position: absolute;
	left: 2px;
	top: 0;
}

#menu a:not(:last-child) {
	border-right: 3px solid #fff;
}

#menu li {
	position: relative;
}

#menu li:first-child > * {
	border-top-right-radius: 10px;
}

#menu li:last-child > * {
	border-bottom-right-radius: 10px;
}

#menu li ul {
	position: absolute;
	left: 0px;
	top: 0px;
	z-index: 0;
}

/* submenu offset */

#menu li li:not(:first-child) a {
	margin-left: 3px;
}

#menu li li:first-child a {
	padding-left: 19px;
}

#menu li li:first-child a.active:before {
	left: 5px;
}

/* item hovers */

#menu li:hover > a {
	background-color: #333;
}

/* main menu transitions */

#menu li, #menu h2 {
	-webkit-transition: all 1s;
	-moz-transition: all 1s;
	transition: all 1s;
}

#menu > li:not(:first-child) {
	-webkit-transform: translate(-100%, 0);
	-moz-transform: translate(-100%, 0);
	-ms-transform: translate(-100%, 0);
	transform: translate(-100%, 0);
}

#menu > li:first-child {
	-webkit-transform-origin: 0 100%;
	-moz-transform-origin: 0 100%;
	-ms-transform-origin: 0 100%;
	-webkit-transform-origin: 0 100%;

	-webkit-transform: rotate(90deg);
	-moz-transform: rotate(90deg);
	-ms-transform: rotate(90deg);
	transform: rotate(90deg);
}

#menu:hover > * {
	-webkit-transform: none !important;
	-moz-transform: none !important;
	-ms-transform: none !important;
	transform: none !important;
}

#menu:hover h2 {
	border-top-left-radius: 0px;
}

/* submenu transitions */

#menu li ul {
	-webkit-transition: all 0.5s;
	-moz-transition: all 0.5s;
	transition: all 0.5s;
}

#menu li:hover ul {
	display: block;
}

#menu li:hover ul {
	left: 180px;
}