.container
	input#checkbox(type="checkbox")
	label(for="checkbox") 
	.menu-content
		ul 
			li Home
			li Apps
			li Contact
			li About
	
View Compiled
@import url('https://fonts.googleapis.com/css?family=Poppins:300,400,500,600');

*,*:before, *:after {
	box-sizing: border-box;
	padding: 0;
	margin: 0;
	font-family: 'Poppins', sans-serif;
}

body {
	background: #A1EAFB;
	padding: 10px;
	display: flex;
	justify-content: center;
	align-items: center;
	min-height: 100vh;
}


.container {
	background: rgba(0,0,0,.03);
	width: 220px;
	padding: 10px;
	min-height: 225px;
}

input#checkbox {
	display: none;
}

label {
	width: 40px;
	height: 35px;
	display: flex;
	background: #fff;
	transition: 0.2s linear;
	position: relative;
}


label:after {
	margin-left: 9px;
	position: absolute;
	content:'';
	background: #8253D7;
	width: 20px;
	height: 2px; 
	box-shadow: 0 6px 0px #8253D7;
	
	top: 15px;
}

label:before {
	margin-left: 9px;
	position: absolute;
	content:'';
	background:#8253D7;
	width: 20px;
	height: 2px;
	top: 9px;;
	left: 0;
}


label:hover {
	background:rgba(255,255,255,.8);
}


label:active {
	background:rgba(255,255,255,.6);
}


.menu-content {
	line-height: 2em;
	font-family: Arial, san-serif;
	background: white;
	max-width: 200px;
	box-shadow: 0 8px 20px -10px rgba(0,0,0,.2);
	overflow: hidden;
	transition: opacity 1s linear;
	color: #6F6F6F;
	opacity: 0;
}

ul {
	list-style: none;
}


ul > li {
	padding: 5px 14px;
	cursor: default;
	transition: 0.2s ease-in-out;
	border-left: 3px solid transparent;
	font-weight: 300;
	
}

ul > li {
	border-bottom: 1px solid rgba(0,0,0,.03500);
}

ul > li:last-child {
	border-bottom: 0;

}



ul > li:hover {
	font-weight: 400;
	color: #8253D7;
	background: rgba(0,0,0,0.05);
	border-left: 3px solid #8253D7;
}


ul > li:active {
	background: rgba(0,0,0,0.1);
}


input:checked ~ .menu-content {
	opacity: 1;
}




input:checked ~ label {
	
	background:#8253D7;
}



input:checked ~ label:after {
	transform: rotate(45deg);
	box-shadow: 0 6px 0px rgba(0,0,0,0);
	top: 18px;
	background: white;
}

input:checked ~ label:before {
	background: white;
	top: 18px;
	transform: rotate(-45deg);
}

External CSS

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External JavaScript

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