Mobile Menu w/o JS

dabblet.css

/**
 * Mobile Menu w/o JS
 */

.navigation {
	display: none;
	position: absolute;
	top: 53px;
	left: 10px;
	border-radius: 5px;
	background-clip: padding;
	background: url(../img/noise.png) #edeae3;
	-webkit-filter: drop-shadow(0 0 10px rgba(50,50,0,0.5));
}

.navigation:before, .navigation:after {
	content: "";
	position: absolute;
}
.navigation:after {
	top: -11px; left: 17px;
	width: 20px;
	height: 20px;
	border-radius: 3px 0 0 0;
	transform: rotate(45deg);
	background: url(../img/noise.png) #edeae3;
}
.navigation:before {
	top: -4px; left: 11px;
	width: 22px;
	height: 0;
	border-width: 0 5px 5px 5px;
	border-style: solid;
	border-color: #edeae3 transparent;
}

.navigation:target {
	display: block;
}

/* Menu Buttons */
.menubutton {
	display: inline-block;
	background: url(../img/noise.png) #edeae3;
	padding: .2rem 1rem;
	border-radius: 5px;
	background-clip: padding;
}

.navigation:target + .menubutton-show {
	display: none;
}
.menubutton-hide {
	display: none;
}
.navigation:target ~ .menubutton-hide {
	display: inline-block;
}

/* Menu styling */
.navigation > ul {
	list-style: none;
	padding: .75rem 0 .5rem;
	margin: 0;
	min-width: 200px
}

.navigation a {
	display: block;
	padding: 3px 1rem;
}
.navigation a:hover {
	background: rgba(255,255,255,0.5)
}

/* Generally */
body {
	font-family: sans-serif;
}

a {
	color: #333;
	text-decoration: none;
}

dabblet.html

<nav id="navigation" class="navigation">
	<ul>
		<li><a href="#">Link 1</a></li>
		<li><a href="#">Link 2</a></li>
		<li><a href="#">Link 3</a></li>
		<li><a href="#">Link 4</a></li>
	</ul>
</nav>

<a class="menubutton menubutton-show" href="#navigation">Show Menu</a>
<a class="menubutton menubutton-hide" href="#">Hide Menu</a>

settings.json

{"view":"split","fontsize":"90","seethrough":"","prefixfree":"1","page":"css"}