<div class="container">
  <div class="menu-container" id="toggle">
  <a href="#" class="menu" ><i class="fa fa-bars" aria-hidden="true"></i></a>
  </div>
  <div class="title-container"><h1><span>Full-Width Menu</span><br />& SVG Weirdness</h1>
    <div class="circle"></div>
</div>

<svg version="1.1" id="svg-left" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
	 viewBox="0 0 600 400" style="enable-background:new 0 0 600 400;" xml:space="preserve">
<g>
	<path class="blob" d="M220.262,366.814c41.228-14.367,64.978-58.826,96.198-136.802
		c43.518-108.692,53.929-137.426,67.672-149.92s154.708-58.065,177.821-65.59C576.392,9.802,591.841,5.391,596.66-2H-2v334.452
		c16.689,8.319,35.468,14.508,56.726,18.745C98.453,359.914,179.034,381.181,220.262,366.814z"/>
</g>
</svg>
<svg version="1.1" id="svg-right" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
	 viewBox="0 0 600 400" style="enable-background:new 0 0 600 400;" xml:space="preserve">
<g>
	<path  class="blob2" d="M361.076,143.985c9.307,26.708,38.108,42.094,88.622,62.319
		c70.412,28.192,89.027,34.936,97.12,43.839c8.093,8.903,37.615,100.223,42.49,115.196c3.045,9.354,5.902,19.361,10.691,22.483V0
		H383.337c-5.389,10.811-9.398,22.976-12.143,36.748C365.547,65.075,351.769,117.277,361.076,143.985z"/>
</g>
</svg>

</div>
  <div class="overlay" id="overlay">
  <nav class="overlay-menu">
    <ul>
      <li ><a href="#">Home</a></li>
      <li><a href="#">Tour</a></li>
      <li><a href="#">Features</a></li>
      <li><a href="#">Contact</a></li>
    </ul>
  </nav>
</div>

@import url(https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.6.3/css/font-awesome.css);
@import url('https://fonts.googleapis.com/css?family=Titan+One');

$pink    : #ff006a;
$purple  : #7b00e0;
$orange  : #ff7900;
$aqua    : #66e6ff;
$yellow  : #ffc901;
$font    : 'Titan One', san-serif;

@mixin base-font($size) {
    font-size: $size;
    font-family: $font;
}

body {
    background: linear-gradient(to top, $purple, $pink);
    margin: 0;
    height: 100%;
    overflow: hidden;
}

.container {
    width: 100%;
    height: 100vh;
    margin: 0 auto;
    overflow: hidden;
}

.menu-container {
    background-color: $yellow;
    border-radius: 100%;
    color: white;
    cursor: pointer;
    position: absolute;
    width: 300px;
    height: 300px;
    left: -120px;
    top: -120px;
    transition: all 0.3s;
  
    &.full-menu {
        border-radius: 0;
        padding: 0 !important;
        position: aboslute;
        width: 100%;
        height: 100%;
        left: 0;
        top: 0;
        transition: all 0.3s;
    }
}

.full-menu .menu {
    top: 40px;
    left: 40px;
}

.menu {
    color: white;
    font-size: 3.5em;
    position: absolute;
    top: 160px;
    left: 160px;
    z-index: 100;
    transition: all 0.3s;
  
    i {
        opacity: 0.7; 
        transform: scale(1);
        transition: all 0.3s;

        &:hover {
            opacity: 1;
            transform: scale(1.2);
            transition: all 0.3s;
        }
    }
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 0%;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
  
    &.open {
        opacity: .9;
        visibility: visible;
        height: 100%;

        li {
            animation: fadeInRight .5s ease forwards;
            animation-delay: .35s;

            &:nth-of-type(2) {
                animation-delay: .4s;
            }

            &:nth-of-type(3) {
                animation-delay: .45s;
            }

            &:nth-of-type(4) {
                animation-delay: .50s;
            }
        }
    }
  
    nav {
        @include base-font(3.2em);
        position: relative;
        height: 70%;
        top: 50%;
        transform: translateY(-50%);
        font-weight: 400;
        text-align: center;
    }
  
    ul {
        list-style: none;
        padding: 0;
        margin: 0 auto;
        display: inline-block;
        position: relative;
        height: 100%; 

        li {
            display: block;
            height: 25%;
            height: calc(100% / 4);
            min-height: 50px;
            position: relative;
            opacity: 0;

            a {
                display: block;
                position: relative;
                color: #fff;
                text-decoration: none;
                overflow: hidden;
                opacity: 0.7;
                transform: scale(1);
                transition: all 0.3s;

                &:hover,
                &:focus,
                &:active {
                    opacity: 1;
                    transform: scale(1.2);
                    transition: all 0.3s;
                }
            }
        }
    }
}

@keyframes fadeInRight {
  
    0% {
        opacity: 0;
        left: 20%;
    }

    100% {
        opacity: 1;
        left: 0;
    }
}

h1 {
    @include base-font(5em);
    background-color: rgba($pink, 0.4);
    border-radius: 100%;
    box-shadow: 0 0 2em 1em rgba($pink, 0.4);
    color: white;
    margin: 30vh auto;
    position: relative;
    text-align: center;
    text-shadow: 0 8px 0 rgba($purple, 0.4);
    transform: rotate(-12deg);
    width: 800px;
    height: auto;
    z-index: -1;

    span {
        color: $yellow;
    }
}

.blob {
    animation: blobby 4s infinite;
}

.blob2 {
    animation: blobby2 6s infinite;
}

@keyframes blobby {
    0% { transform: scale(1); }
    50% { transform: scale(1.08); }
    100% { transform: scale(1); }
}

@keyframes blobby2 {
    0% { transform: scale(1); }
    50% { transform: scale(1.18); }
    100% { transform: scale(1); }
}

svg {
    position: absolute;
    top: 0;
}

#svg-right {
    display: block;
    fill: $purple;
    opacity: 0.5;  
    right: 0;
    width: 60%;
    z-index: -10;
}

#svg-left {
    fill: $pink;
    margin: 0;
    width: 60%;
    z-index: -10;
}

@media all and (max-width: 980px) {
  
  h1 {
        @include base-font(3em);
  }
  
}

@media all and (max-width: 480px) {
  
  h1 {
        @include base-font(2em);
  }
  
}

const menu = document.querySelector('#toggle');  
const menuItems = document.querySelector('#overlay');  
const menuContainer = document.querySelector('.menu-container');  
const menuIcon = document.querySelector('i');  

function toggleMenu(e) {
    menuItems.classList.toggle('open');
    menuContainer.classList.toggle('full-menu');
    menuIcon.classList.toggle('fa-bars');
    menuIcon.classList.add('fa-times');
    e.preventDefault();
}

menu.addEventListener('click', toggleMenu, false);