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HTML 

              
                <!--      Made by Erik Terwan        -->
<!--     24th of November 2015       -->
<!--  Modified by Magiclike Jan 2023 -->
<!--          MIT License            -->
<nav id="menu_container_mobile">
	<div id="menuToggle_mobile">
		<!--
    A fake / hidden checkbox is used as click reciever,
    so you can use the :checked selector on it.
    -->
		<input type="checkbox" aria-label="Mobile menu" />
		<!--
    Some spans to act as a hamburger.
    
    They are acting like a real hamburger,
    not that McDonalds stuff.
    -->
		<span></span>
		<span></span>
		<span></span>
		<!--
    Too bad the menu has to be inside of the button
    but hey, it's pure CSS magic.
    -->
		<ul id="menu_mobile">
			<a href="#home">
				<li>Home</li>
			</a>
			<a href="#about">
				<li>About me</li>
			</a>
			<a href="#links">
				<li>Where to find me / Contact</li>
			</a>
			<a href="#advices">
				<li>Advices</li>
			</a>
			<a href="#projects">
				<li>Projects</li>
			</a>
			<a href="#donate">
				<li>Support me</li>
			</a>
		</ul>
	</div>
</nav>
!

CSS 

              
                /*
 * Made by Erik Terwan
 * 24th of November 2015
 * Modified by Magiclike Jan 2023
 * MIT License
 *
 *
 * If you are thinking of using this in
 * production code, beware of the browser
 * prefixes.
 */

body {
	/* make it look decent enough */
	background: #000000;
	color: rgb(200, 200, 200);
	font-family: Inconsolata, monospace;
}

#menu_container_mobile {
	position: fixed;
	right: 0;
}

#menuToggle_mobile {
	display: block;
	position: relative;
	top: 10px;
	right: 10px;
	z-index: 1;
	-webkit-user-select: none;
	user-select: none;
}

#menuToggle_mobile a {
	text-decoration: none;
	color: rgb(200, 200, 200);
	transition: ease-out 250ms;
}

#menuToggle_mobile a:hover {
	color: #7cb242;
	transition: ease-in 250ms;
}

#menuToggle_mobile input {
	display: block;
	width: 40px;
	height: 32px;
	position: absolute;
	top: -8px;
	right: -6.5px;
	cursor: pointer;
	opacity: 0; /* hide this */
	z-index: 2; /* and place it over the hamburger */
	-webkit-touch-callout: none;
}

/*
 * Just a quick hamburger
 */
#menuToggle_mobile span {
	display: block;
	width: 33px;
	height: 4px;
	margin-bottom: 5px;
	position: relative;
	background: rgb(200, 200, 200);
	border-radius: 3px;
	z-index: 1;
	transform-origin: 4px 0px;
	transition: transform 0.5s cubic-bezier(0.77, 0.2, 0.05, 1),
		background 0.5s cubic-bezier(0.77, 0.2, 0.05, 1), opacity 0.55s ease;
}

#menuToggle_mobile span:first-child {
	transform-origin: 0% 0%;
}

#menuToggle_mobile span:nth-last-child(2) {
	transform-origin: 0% 100%;
}

/* 
 * Transform all the slices of hamburger
 * into a crossmark.
 */
#menuToggle_mobile input:checked ~ span {
	opacity: 1;
	transform: rotate(45deg) translate(-2px, -1px);
	background: rgb(200, 200, 200);
}

/*
 * But let's hide the middle one.
 */
#menuToggle_mobile input:checked ~ span:nth-last-child(3) {
	opacity: 0;
	transform: rotate(0deg) scale(0.2, 0.2);
}

/*
 * Ohyeah and the last one should go the other direction
 */
#menuToggle_mobile input:checked ~ span:nth-last-child(2) {
	transform: rotate(-45deg) translate(0, -1px);
}

/*
 * Make this absolute positioned
 * at the top left of the screen
 */
#menu_mobile {
	position: absolute;
	min-width: 300px;
	width: 30%;
	margin: -100px 0 0 50px;
	padding: 50px;
	padding-top: 125px;
	background: #202020;
	list-style-type: none;
	-webkit-font-smoothing: antialiased;
	/* to stop flickering of text in safari */
	right: -30%;
	transform: translate(100%, 0);
	transition: transform 0.5s cubic-bezier(0.77, 0.2, 0.05, 1);
	border-bottom-left-radius: 10px;
}

#menu_mobile li {
	padding: 10px 0;
	font-size: 22px;
}

/*
 * And let's slide it in from the right
 */
#menuToggle_mobile input:checked ~ ul {
	transform: none;
}
!

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