Hamburger Overlay Menu on Full Screen (Without Using JavaScript/Jquery) - html

Question

I want to create a Hamburger overlay menu on full screen for my site. The point is I am creating this site in Google Amp so unable to use javascript. Please suggest a way to create this menu using pure CSS and HTML. I am a newbie so your help will be much appreciated.
Any Link or tutorial would be very helpful...
Code:
#nav-btn:checked~nav ul {
transform: translate(-50%, -50%);
}
nav {
background: rgba(52, 82, 113, 0.98) none repeat scroll 0% 0%;
height: 100%;
opacity: 0;
position: absolute;
top: 0px;
transition: opacity 0.5s ease 0s, visibility 0s ease 0.5s;
visibility: 0;
width: 100%;
z-index: -1;
}
nav ul {
left: 44%;
moz-transition: all 1s ease-in-out;
o-transition: all 1s ease-in-out;
position: absolute;
top: 30%;
transform: translate(-50%, 0%);
transition: all 1s ease-in-out;
webkit-transition: all 1s ease-in-out;
}
nav li {
font-size: 30px;
list-style: none;
padding-bottom: 10px;
text-align: center;
}
nav ul li a:hover {
color: #fff;
}
nav li a {
color: #ccc;
text-decoration: none;
}
.page-content-card.hidden {
display: none;
}
.overlay {
position: fixed;
background: $color-main;
top: 0;
left: 0;
width: 100%;
height: 0%;
opacity: 0;
visibility: hidden;
transition: opacity .35s, visibility .35s, height .35s;
overflow: hidden;
}
<div>
<input type="checkbox" name="nav-btn" id="nav-btn" />
<span></span>
<div class="overlay">
<nav>
<ul>
<li>Home</li>
<li>Service</li>
<li>Portfolio</li>
<li>Contact</li>
</ul>
</nav>
</div>
</div>

Answer 1

I thinks that's not possible without jQuery/javascript.
You should use this clean snippet:
$('#nav-btn').click(function() {
$('.overlay').toggleClass('open');
)};

Answer 2

You can try this...
/* CSS Document */
/*Strip the ul of padding and list styling*/
ul {
list-style-type: none;
margin: 0;
padding: 0;
position: absolute;
}
/*Create a horizontal list with spacing*/
li {
display: inline-block;
float: left;
margin-right: 1px;
}
/*Style for menu links*/
li a {
display: block;
min-width: 140px;
height: 50px;
text-align: center;
line-height: 50px;
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
color: #fff;
background: #2f3036;
text-decoration: none;
}
/*Hover state for top level links*/
li:hover a {
background: #19c589;
}
/*Style for dropdown links*/
li:hover ul a {
background: #f3f3f3;
color: #2f3036;
height: 40px;
line-height: 40px;
}
/*Hover state for dropdown links*/
li:hover ul a:hover {
background: #19c589;
color: #fff;
}
/*Hide dropdown links until they are needed*/
li ul {
display: none;
}
/*Make dropdown links vertical*/
li ul li {
display: block;
float: none;
}
/*Prevent text wrapping*/
li ul li a {
width: auto;
min-width: 100px;
padding: 0 20px;
text-align: left;
}
/*Display the dropdown on hover*/
ul li a:hover+.hidden,
.hidden:hover {
display: block;
}
/*Style 'show menu' label button and hide it by default*/
.show-menu {
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
text-decoration: none;
color: #fff;
background: #19c589;
text-align: center;
padding: 10px 0;
display: none;
}
/*Hide checkbox*/
input[type=checkbox] {
display: none;
}
/* Show menu when invisible checkbox is checked */
input[type=checkbox]:checked~#menu {
display: block;
}
/*Responsive Styles*/
#media screen and (max-width: 760px) {
/*Make dropdown links appear inline*/
ul {
position: static;
display: none;
}
/*Create vertical spacing*/
li {
margin-bottom: 2px;
}
/*Make all menu links full width*/
ul li,
li a {
width: 100%;
}
/*Display 'show menu' link*/
.show-menu {
display: block;
}
/*Pointer on Hover, so that the user knows of an active link*/
.show-menu:hover {
cursor: pointer;
}
/*Center the text*/
li ul li a {
text-align: center;
}
}
<label for="show-menu" class="show-menu">Show Menu</label>
<input type="checkbox" id="show-menu" role="button">
<ul id="menu">
<li>Home</li>
<li>
About ↓
<ul class="hidden">
<li>Who We Are</li>
<li>What We Do</li>
</ul>
</li>
<li>
Portfolio ↓
<ul class="hidden">
<li>Photography</li>
<li>Web & User Interface Design</li>
<li>Illustration</li>
</ul>
</li>
<li>News</li>
<li>Contact</li>
</ul>
Source - http://bacsoftwareconsulting.com/blog/index.php/web-development/how-to-create-a-responsive-menu-without-jquery/