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HTML 

              
                <header>
  <nav class="cd-stretchy-nav">
    <a class="cd-nav-trigger" href="#0">
			Menu
			<span aria-hidden="true"></span>
		</a>
    <ul>
      <li><a href="#0" class="active"><span>Home</span></a></li>
      <li><a href="#0"><span>Portfolio</span></a></li>
      <li><a href="#0"><span>Services</span></a></li>
      <li><a href="#0"><span>Store</span></a></li>
      <li><a href="#0"><span>Contact</span></a></li>
    </ul>
    <span aria-hidden="true" class="stretchy-nav-bg"></span>
  </nav>
</header>

<header>
  <nav class="cd-stretchy-nav add-content">
    <a class="cd-nav-trigger" href="#0">			Menu
      			<span aria-hidden="true"></span>
		    </a>

    <ul>
      <li><a href="#0"><span>Image</span></a></li>
      <li><a href="#0"><span>Audio</span></a></li>
      <li><a href="#0"><span>Link</span></a></li>
      <li><a href="#0"><span>Video</span></a></li>
    </ul>

    <span class="stretchy-nav-bg"></span>
  </nav>
</header>

<div class="cd-editable-content-wrapper">
  <div class="cd-editable-content">
    <nav class="cd-stretchy-nav edit-content">
      <a class="cd-nav-trigger" href="#0">				Menu
        				<span aria-hidden="true"></span>
			      </a>
      <ul>
        <li><a href="#0"><span>Download</span></a></li>
        <li><a href="#0"><span>Share</span></a></li>
        <li><a href="#0"><span>Save</span></a></li>
        <li><a href="#0"><span>Trash</span></a></li>
      </ul>

      <span aria-hidden="true" class="stretchy-nav-bg"></span>
    </nav>

    <img src="https://codyhouse.co/demo/stretchy-navigation/img/img.png" alt="image placeholder" />
  </div>
</div>
!

CSS 

              
                *, *::after, *::before {
  box-sizing: border-box;
}

html {
  font-size: 62.5%;
}

body {
  font-size: 1.6rem;
  font-family: "Source Sans Pro", sans-serif;
  color: #003c5d;
  background-color: #ffffff;
  background-color: #003c5d;
}

a {
  color: #9acd91;
  text-decoration: none;
}

img {
  max-width: 100%;
}

/* -------------------------------- 

Stretchy Nav style - common to:
 - basic navigation
 - add-content navigation
 - edit-content navigation

-------------------------------- */
.cd-stretchy-nav {
  position: absolute;
  z-index: 2;
  top: 40px;
  right: 5%;
}
.cd-stretchy-nav .stretchy-nav-bg {
  /* this is the stretching navigation background */
  position: absolute;
  z-index: 1;
  top: 0;
  right: 0;
  width: 60px;
  height: 60px;
  border-radius: 30px;
  background: #9acd91;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
  -webkit-transition: height 0.2s, box-shadow 0.2s;
  -moz-transition: height 0.2s, box-shadow 0.2s;
  transition: height 0.2s, box-shadow 0.2s;
}
.cd-stretchy-nav.nav-is-visible .stretchy-nav-bg {
  height: 100%;
  box-shadow: 0 6px 30px rgba(0, 0, 0, 0.2);
}

.cd-nav-trigger {
  position: absolute;
  z-index: 3;
  top: 0;
  right: 0;
  height: 60px;
  width: 60px;
  border-radius: 50%;
  /* replace text with image */
  overflow: hidden;
  white-space: nowrap;
  color: transparent;
}
.cd-nav-trigger span, .cd-nav-trigger span::after, .cd-nav-trigger span::before {
  /* this is the hamburger icon */
  position: absolute;
  width: 16px;
  height: 2px;
  background-color: #ffffff;
}
.cd-nav-trigger span {
  /* middle line of the hamburger icon */
  left: 50%;
  top: 50%;
  bottom: auto;
  right: auto;
  -webkit-transform: translateX(-50%) translateY(-50%);
  -moz-transform: translateX(-50%) translateY(-50%);
  -ms-transform: translateX(-50%) translateY(-50%);
  -o-transform: translateX(-50%) translateY(-50%);
  transform: translateX(-50%) translateY(-50%);
  -webkit-transition: background-color 0.2s;
  -moz-transition: background-color 0.2s;
  transition: background-color 0.2s;
}
.cd-nav-trigger span::after, .cd-nav-trigger span::before {
  /* top and bottom lines of the hamburger icon */
  content: '';
  top: 0;
  left: 0;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  -webkit-transition: -webkit-transform 0.2s;
  -moz-transition: -moz-transform 0.2s;
  transition: transform 0.2s;
}
.cd-nav-trigger span::before {
  -webkit-transform: translateY(-6px);
  -moz-transform: translateY(-6px);
  -ms-transform: translateY(-6px);
  -o-transform: translateY(-6px);
  transform: translateY(-6px);
}
.cd-nav-trigger span::after {
  -webkit-transform: translateY(6px);
  -moz-transform: translateY(6px);
  -ms-transform: translateY(6px);
  -o-transform: translateY(6px);
  transform: translateY(6px);
}
.no-touch .cd-nav-trigger:hover ~ .stretchy-nav-bg {
  box-shadow: 0 6px 30px rgba(0, 0, 0, 0.2);
}
.nav-is-visible .cd-nav-trigger span {
  background-color: transparent;
}
.nav-is-visible .cd-nav-trigger span::before {
  -webkit-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  transform: rotate(-45deg);
}
.nav-is-visible .cd-nav-trigger span::after {
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
}

.cd-stretchy-nav ul {
  position: relative;
  z-index: 2;
  padding: 60px 0 0;
  visibility: hidden;
  -webkit-transition: visibility 0.3s;
  -moz-transition: visibility 0.3s;
  transition: visibility 0.3s;
  text-align: right;
}
.cd-stretchy-nav ul a {
  position: relative;
  display: block;
  height: 50px;
  line-height: 50px;
  padding: 0 calc(1em + 60px) 0 1em;
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.4rem;
  -webkit-transition: color 0.2s;
  -moz-transition: color 0.2s;
  transition: color 0.2s;
}
.cd-stretchy-nav ul a::after {
  /* navigation item icons */
  content: '';
  position: absolute;
  height: 16px;
  width: 16px;
  right: 22px;
  top: 50%;
  -webkit-transform: translateY(-50%) scale(0);
  -moz-transform: translateY(-50%) scale(0);
  -ms-transform: translateY(-50%) scale(0);
  -o-transform: translateY(-50%) scale(0);
  transform: translateY(-50%) scale(0);
  opacity: .6;
  background: url(https://codyhouse.co/demo/stretchy-navigation/img/cd-sprite-1.svg) no-repeat 0 0;
}
.cd-stretchy-nav ul a::before {
  /* line visible next to the active navigation item */
  content: '';
  position: absolute;
  width: 3px;
  height: 16px;
  top: 50%;
  right: 60px;
  -webkit-transform: translateX(3px) translateY(-50%) scaleY(0);
  -moz-transform: translateX(3px) translateY(-50%) scaleY(0);
  -ms-transform: translateX(3px) translateY(-50%) scaleY(0);
  -o-transform: translateX(3px) translateY(-50%) scaleY(0);
  transform: translateX(3px) translateY(-50%) scaleY(0);
  background-color: #0a9581;
}
.cd-stretchy-nav ul li:first-of-type a::after {
  /* change custom icon using image sprites */
  background-position: -32px 0;
}
.cd-stretchy-nav ul li:nth-of-type(2) a::after {
  background-position: -64px 0;
}
.cd-stretchy-nav ul li:nth-of-type(3) a::after {
  background-position: -48px 0;
}
.cd-stretchy-nav ul li:nth-of-type(4) a::after {
  background-position: 0 0;
}
.cd-stretchy-nav ul li:nth-of-type(5) a::after {
  background-position: -16px 0;
}
.cd-stretchy-nav ul span {
  /* navigation item labels */
  display: block;
  opacity: 0;
  -webkit-transform: translateX(-25px);
  -moz-transform: translateX(-25px);
  -ms-transform: translateX(-25px);
  -o-transform: translateX(-25px);
  transform: translateX(-25px);
}

.cd-stretchy-nav.nav-is-visible ul {
  visibility: visible;
}
.cd-stretchy-nav.nav-is-visible ul a::after {
  /* navigation item icons */
  -webkit-transform: translateY(-50%) scale(1);
  -moz-transform: translateY(-50%) scale(1);
  -ms-transform: translateY(-50%) scale(1);
  -o-transform: translateY(-50%) scale(1);
  transform: translateY(-50%) scale(1);
  -webkit-animation: scaleIn 0.15s backwards;
  -moz-animation: scaleIn 0.15s backwards;
  animation: scaleIn 0.15s backwards;
  -webkit-transition: opacity 0.2s;
  -moz-transition: opacity 0.2s;
  transition: opacity 0.2s;
}
.cd-stretchy-nav.nav-is-visible ul a.active {
  color: #ffffff;
}
.cd-stretchy-nav.nav-is-visible ul a.active::after {
  opacity: 1;
}
.cd-stretchy-nav.nav-is-visible ul a.active::before {
  -webkit-transform: translateX(3px) translateY(-50%) scaleY(1);
  -moz-transform: translateX(3px) translateY(-50%) scaleY(1);
  -ms-transform: translateX(3px) translateY(-50%) scaleY(1);
  -o-transform: translateX(3px) translateY(-50%) scaleY(1);
  transform: translateX(3px) translateY(-50%) scaleY(1);
  -webkit-transition: -webkit-transform 0.15s 0.3s;
  -moz-transition: -moz-transform 0.15s 0.3s;
  transition: transform 0.15s 0.3s;
}
.cd-stretchy-nav.nav-is-visible ul span {
  opacity: 1;
  -webkit-transform: translateX(0);
  -moz-transform: translateX(0);
  -ms-transform: translateX(0);
  -o-transform: translateX(0);
  transform: translateX(0);
  -webkit-animation: slideIn 0.15s backwards;
  -moz-animation: slideIn 0.15s backwards;
  animation: slideIn 0.15s backwards;
  -webkit-transition: -webkit-transform 0.2s;
  -moz-transition: -moz-transform 0.2s;
  transition: transform 0.2s;
}
.no-touch .cd-stretchy-nav.nav-is-visible ul a:hover {
  color: #ffffff;
}
.no-touch .cd-stretchy-nav.nav-is-visible ul a:hover::after {
  opacity: 1;
}
.no-touch .cd-stretchy-nav.nav-is-visible ul a:hover span {
  -webkit-transform: translateX(-5px);
  -moz-transform: translateX(-5px);
  -ms-transform: translateX(-5px);
  -o-transform: translateX(-5px);
  transform: translateX(-5px);
}
.cd-stretchy-nav.nav-is-visible ul li:first-of-type a::after,
.cd-stretchy-nav.nav-is-visible ul li:first-of-type span {
  -webkit-animation-delay: 0.05s;
  -moz-animation-delay: 0.05s;
  animation-delay: 0.05s;
}
.cd-stretchy-nav.nav-is-visible ul li:nth-of-type(2) a::after,
.cd-stretchy-nav.nav-is-visible ul li:nth-of-type(2) span {
  -webkit-animation-delay: 0.1s;
  -moz-animation-delay: 0.1s;
  animation-delay: 0.1s;
}
.cd-stretchy-nav.nav-is-visible ul li:nth-of-type(3) a::after,
.cd-stretchy-nav.nav-is-visible ul li:nth-of-type(3) span {
  -webkit-animation-delay: 0.15s;
  -moz-animation-delay: 0.15s;
  animation-delay: 0.15s;
}
.cd-stretchy-nav.nav-is-visible ul li:nth-of-type(4) a::after,
.cd-stretchy-nav.nav-is-visible ul li:nth-of-type(4) span {
  -webkit-animation-delay: 0.2s;
  -moz-animation-delay: 0.2s;
  animation-delay: 0.2s;
}
.cd-stretchy-nav.nav-is-visible ul li:nth-of-type(5) a::after,
.cd-stretchy-nav.nav-is-visible ul li:nth-of-type(5) span {
  -webkit-animation-delay: 0.25s;
  -moz-animation-delay: 0.25s;
  animation-delay: 0.25s;
}

/* -------------------------------- 

add-content navigation style

-------------------------------- */
.cd-stretchy-nav.add-content {
  top: 40px;
  left: 50%;
  right: auto;
  -webkit-transform: translateX(-50%);
  -moz-transform: translateX(-50%);
  -ms-transform: translateX(-50%);
  -o-transform: translateX(-50%);
  transform: translateX(-50%);
  width: 300px;
}
.cd-stretchy-nav.add-content .stretchy-nav-bg {
  left: 50%;
  right: auto;
  -webkit-transform: translateX(-50%);
  -moz-transform: translateX(-50%);
  -ms-transform: translateX(-50%);
  -o-transform: translateX(-50%);
  transform: translateX(-50%);
  background-color: #8ac57f;
  -webkit-transition: width 0.2s, box-shadow 0.2s;
  -moz-transition: width 0.2s, box-shadow 0.2s;
  transition: width 0.2s, box-shadow 0.2s;
}
.cd-stretchy-nav.add-content.nav-is-visible .stretchy-nav-bg {
  width: 100%;
  box-shadow: 0 6px 30px rgba(0, 0, 0, 0.2);
}

.cd-stretchy-nav.add-content .cd-nav-trigger {
  left: 50%;
  right: auto;
  -webkit-transform: translateX(-50%);
  -moz-transform: translateX(-50%);
  -ms-transform: translateX(-50%);
  -o-transform: translateX(-50%);
  transform: translateX(-50%);
  background-color: #9acd91;
}
.cd-stretchy-nav.add-content .cd-nav-trigger span {
  background-color: transparent;
}
.cd-stretchy-nav.add-content .cd-nav-trigger span::before {
  /* used to create the plus icon */
  -webkit-transform: rotate(90deg);
  -moz-transform: rotate(90deg);
  -ms-transform: rotate(90deg);
  -o-transform: rotate(90deg);
  transform: rotate(90deg);
}
.cd-stretchy-nav.add-content .cd-nav-trigger span::after {
  /* used to create the plus icon */
  -webkit-transform: rotate(0deg);
  -moz-transform: rotate(0deg);
  -ms-transform: rotate(0deg);
  -o-transform: rotate(0deg);
  transform: rotate(0deg);
}

.cd-stretchy-nav.add-content.nav-is-visible .cd-nav-trigger {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}
.cd-stretchy-nav.add-content.nav-is-visible .cd-nav-trigger span::before {
  -webkit-transform: rotate(-135deg);
  -moz-transform: rotate(-135deg);
  -ms-transform: rotate(-135deg);
  -o-transform: rotate(-135deg);
  transform: rotate(-135deg);
}
.cd-stretchy-nav.add-content.nav-is-visible .cd-nav-trigger span::after {
  -webkit-transform: rotate(-225deg);
  -moz-transform: rotate(-225deg);
  -ms-transform: rotate(-225deg);
  -o-transform: rotate(-225deg);
  transform: rotate(-225deg);
}

.cd-stretchy-nav.add-content ul {
  padding-top: 0;
}
.cd-stretchy-nav.add-content ul::after {
  clear: both;
  content: "";
  display: table;
}
.cd-stretchy-nav.add-content ul li {
  display: inline-block;
  float: left;
  width: 60px;
}
.cd-stretchy-nav.add-content ul li:nth-of-type(2) {
  /* space occupied by the navigation trigger */
  margin-right: 60px;
}
.cd-stretchy-nav.add-content ul a {
  padding: 0;
  height: 60px;
  width: 100%;
}
.cd-stretchy-nav.add-content ul a::after {
  top: 50%;
  left: 22px;
  right: auto;
  -webkit-transform: translateY(-50%) scale(0);
  -moz-transform: translateY(-50%) scale(0);
  -ms-transform: translateY(-50%) scale(0);
  -o-transform: translateY(-50%) scale(0);
  transform: translateY(-50%) scale(0);
  background-image: url(https://codyhouse.co/demo/stretchy-navigation/img/cd-sprite-2.svg);
}
.cd-stretchy-nav.add-content ul li:first-of-type a::after {
  background-position: -16px 0px;
}
.cd-stretchy-nav.add-content ul li:nth-of-type(2) a::after {
  background-position: 0px 0px;
}
.cd-stretchy-nav.add-content ul li:nth-of-type(3) a::after {
  background-position: -48px 0px;
}
.cd-stretchy-nav.add-content ul li:nth-of-type(4) a::after {
  background-position: -32px 0px;
}
.cd-stretchy-nav.add-content ul li:first-of-type a::after,
.cd-stretchy-nav.add-content ul li:nth-of-type(4) a::after {
  -webkit-animation-delay: 0.2s;
  -moz-animation-delay: 0.2s;
  animation-delay: 0.2s;
}
.cd-stretchy-nav.add-content ul li:nth-of-type(2) a::after,
.cd-stretchy-nav.add-content ul li:nth-of-type(3) a::after {
  -webkit-animation-delay: 0.1s;
  -moz-animation-delay: 0.1s;
  animation-delay: 0.1s;
}

.cd-stretchy-nav.add-content.nav-is-visible ul a::after {
  -webkit-animation-name: scaleIn;
  -moz-animation-name: scaleIn;
  animation-name: scaleIn;
  -webkit-transform: translateY(-50%) scale(1);
  -moz-transform: translateY(-50%) scale(1);
  -ms-transform: translateY(-50%) scale(1);
  -o-transform: translateY(-50%) scale(1);
  transform: translateY(-50%) scale(1);
}

.cd-stretchy-nav.add-content ul span {
  position: absolute;
  left: 0;
  top: -20px;
  width: 100%;
  padding: 0.6em 0;
  opacity: 0;
  visibility: hidden;
  background-color: rgba(0, 0, 0, 0.8);
  border-radius: 2px;
  font-size: 1.2rem;
  line-height: 1;
  white-space: nowrap;
  text-align: center;
  -webkit-transition: opacity 0.2s, visibility 0.2s;
  -moz-transition: opacity 0.2s, visibility 0.2s;
  transition: opacity 0.2s, visibility 0.2s;
  /* reset default style */
  -webkit-transform: translateX(0);
  -moz-transform: translateX(0);
  -ms-transform: translateX(0);
  -o-transform: translateX(0);
  transform: translateX(0);
}
.cd-stretchy-nav.add-content ul span::after {
  /* triangle below the tooltip */
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  right: auto;
  -webkit-transform: translateX(-50%);
  -moz-transform: translateX(-50%);
  -ms-transform: translateX(-50%);
  -o-transform: translateX(-50%);
  transform: translateX(-50%);
  height: 0;
  width: 0;
  border: 4px solid transparent;
  border-top-color: rgba(0, 0, 0, 0.8);
}

.cd-stretchy-nav.add-content.nav-is-visible ul span {
  /* reset default style */
  -webkit-animation: none;
  -moz-animation: none;
  animation: none;
}

.no-touch .cd-stretchy-nav.add-content.nav-is-visible ul a:hover span {
  opacity: 1;
  visibility: visible;
  /* reset default style */
  -webkit-transform: translateX(0);
  -moz-transform: translateX(0);
  -ms-transform: translateX(0);
  -o-transform: translateX(0);
  transform: translateX(0);
}

/* -------------------------------- 

edit content

-------------------------------- */
.cd-editable-content-wrapper{
  position:absolute;
  top:40px;
  left: 5%;
}

.cd-editable-content {
  /* used to wrap the image and the navigation */
  position: relative;
  width: 90%;
  max-width: 400px;
}
.cd-editable-content img {
  display: block;
  border-radius: .25em;
}

.cd-stretchy-nav.edit-content {
  position: absolute;
  top: 15px;
  right: 15px;
}
.cd-stretchy-nav.edit-content .stretchy-nav-bg {
  height: 30px;
  width: 30px;
  background-color: rgba(0, 0, 0, 0.4);
  box-shadow: none;
  -webkit-transition: background 0.2s, height 0.2s;
  -moz-transition: background 0.2s, height 0.2s;
  transition: background 0.2s, height 0.2s;
}
.cd-stretchy-nav.edit-content.nav-is-visible .stretchy-nav-bg {
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  /* reset default style */
  box-shadow: none;
}

.cd-stretchy-nav.edit-content .cd-nav-trigger {
  height: 30px;
  width: 30px;
}
.cd-stretchy-nav.edit-content .cd-nav-trigger span {
  opacity: 0;
  background-color: transparent;
}
.cd-stretchy-nav.edit-content .cd-nav-trigger span::before {
  -webkit-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  transform: rotate(-45deg);
}
.cd-stretchy-nav.edit-content .cd-nav-trigger span::after {
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
}
.cd-stretchy-nav.edit-content .cd-nav-trigger span, .cd-stretchy-nav.edit-content .cd-nav-trigger span::before, .cd-stretchy-nav.edit-content .cd-nav-trigger span::after {
  /* used to create the 'X' icon when the navigation is open */
  width: 12px;
}
.cd-stretchy-nav.edit-content .cd-nav-trigger::after {
  /* edit icon */
  content: '';
  position: absolute;
  height: 16px;
  width: 16px;
  left: 50%;
  top: 50%;
  bottom: auto;
  right: auto;
  -webkit-transform: translateX(-50%) translateY(-50%);
  -moz-transform: translateX(-50%) translateY(-50%);
  -ms-transform: translateX(-50%) translateY(-50%);
  -o-transform: translateX(-50%) translateY(-50%);
  transform: translateX(-50%) translateY(-50%);
  background: url(https://codyhouse.co/demo/stretchy-navigation/img/cd-sprite-3.svg) no-repeat 0 0;
}
.cd-stretchy-nav.edit-content .cd-nav-trigger span, .cd-stretchy-nav.edit-content .cd-nav-trigger::after {
  -webkit-transition: opacity 0.2s;
  -moz-transition: opacity 0.2s;
  transition: opacity 0.2s;
}
.no-touch .cd-stretchy-nav.edit-content .cd-nav-trigger:hover ~ .stretchy-nav-bg {
  box-shadow: none;
  background-color: rgba(0, 0, 0, 0.8);
}

.cd-stretchy-nav.edit-content.nav-is-visible .cd-nav-trigger span {
  opacity: 1;
}
.cd-stretchy-nav.edit-content.nav-is-visible .cd-nav-trigger span::before {
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
}
.cd-stretchy-nav.edit-content.nav-is-visible .cd-nav-trigger span::after {
  -webkit-transform: rotate(135deg);
  -moz-transform: rotate(135deg);
  -ms-transform: rotate(135deg);
  -o-transform: rotate(135deg);
  transform: rotate(135deg);
}

.cd-stretchy-nav.edit-content.nav-is-visible .cd-nav-trigger::after {
  /* hide edit icon */
  opacity: 0;
}

.cd-stretchy-nav.edit-content ul {
  padding-top: 30px;
}

.cd-stretchy-nav.edit-content ul a {
  width: 30px;
  height: 30px;
  line-height: 30px;
  padding: 0;
}
.cd-stretchy-nav.edit-content ul a::after {
  right: 7px;
  background-image: url(https://codyhouse.co/demo/stretchy-navigation/img/cd-sprite-3.svg);
}

.cd-stretchy-nav.edit-content ul li:first-of-type a::after {
  background-position: -16px 0;
}

.cd-stretchy-nav.edit-content ul li:nth-of-type(2) a::after {
  background-position: -32px 0;
}

.cd-stretchy-nav.edit-content ul li:nth-of-type(3) a::after {
  background-position: -48px 0;
}

.cd-stretchy-nav.edit-content ul li:nth-of-type(4) a::after {
  background-position: -64px 0;
}

.cd-stretchy-nav.edit-content ul span {
  position: absolute;
  top: 0;
  right: 35px;
  height: 30px;
  line-height: 30px;
  padding: 0 1em;
  opacity: 0;
  visibility: hidden;
  background-color: rgba(0, 0, 0, 0.55);
  border-radius: 2px;
  text-align: center;
  -webkit-transition: opacity 0.2s, visibility 0.2s;
  -moz-transition: opacity 0.2s, visibility 0.2s;
  transition: opacity 0.2s, visibility 0.2s;
}
.cd-stretchy-nav.edit-content ul span::after {
  /* triangle below the tooltip */
  content: '';
  position: absolute;
  left: 100%;
  top: 50%;
  bottom: auto;
  -webkit-transform: translateY(-50%);
  -moz-transform: translateY(-50%);
  -ms-transform: translateY(-50%);
  -o-transform: translateY(-50%);
  transform: translateY(-50%);
  height: 0;
  width: 0;
  border: 4px solid transparent;
  border-left-color: rgba(0, 0, 0, 0.55);
}

.cd-stretchy-nav.edit-content.nav-is-visible ul span {
  /* reset default style */
  -webkit-animation: none;
  -moz-animation: none;
  animation: none;
}
.no-touch .cd-stretchy-nav.edit-content.nav-is-visible ul a:hover span {
  opacity: 1;
  visibility: visible;
  /* reset default style */
  -webkit-transform: translateX(0);
  -moz-transform: translateX(0);
  -ms-transform: translateX(0);
  -o-transform: translateX(0);
  transform: translateX(0);
}

/* -------------------------------- 

main content basic style

-------------------------------- */
.cd-main-content {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  padding: 100px 0;
  background-color: #003c5d;
}

/* -------------------------------- 

keyframes

-------------------------------- */
@-webkit-keyframes scaleIn {
  from {
    -webkit-transform: translateY(-50%) scale(0);
  }
  to {
    -webkit-transform: translateY(-50%) scale(1);
  }
}
@-moz-keyframes scaleIn {
  from {
    -moz-transform: translateY(-50%) scale(0);
  }
  to {
    -moz-transform: translateY(-50%) scale(1);
  }
}
@keyframes scaleIn {
  from {
    -webkit-transform: translateY(-50%) scale(0);
    -moz-transform: translateY(-50%) scale(0);
    -ms-transform: translateY(-50%) scale(0);
    -o-transform: translateY(-50%) scale(0);
    transform: translateY(-50%) scale(0);
  }
  to {
    -webkit-transform: translateY(-50%) scale(1);
    -moz-transform: translateY(-50%) scale(1);
    -ms-transform: translateY(-50%) scale(1);
    -o-transform: translateY(-50%) scale(1);
    transform: translateY(-50%) scale(1);
  }
}
@-webkit-keyframes slideIn {
  from {
    opacity: 0;
    -webkit-transform: translateX(-25px);
  }
  to {
    opacity: 1;
    -webkit-transform: translateX(0);
  }
}
@-moz-keyframes slideIn {
  from {
    opacity: 0;
    -moz-transform: translateX(-25px);
  }
  to {
    opacity: 1;
    -moz-transform: translateX(0);
  }
}
@keyframes slideIn {
  from {
    opacity: 0;
    -webkit-transform: translateX(-25px);
    -moz-transform: translateX(-25px);
    -ms-transform: translateX(-25px);
    -o-transform: translateX(-25px);
    transform: translateX(-25px);
  }
  to {
    opacity: 1;
    -webkit-transform: translateX(0);
    -moz-transform: translateX(0);
    -ms-transform: translateX(0);
    -o-transform: translateX(0);
    transform: translateX(0);
  }
}
!

JS 

              
                jQuery(document).ready(function() {
  if ($('.cd-stretchy-nav').length > 0) {
    var stretchyNavs = $('.cd-stretchy-nav');

    stretchyNavs.each(function() {
      var stretchyNav = $(this),
        stretchyNavTrigger = stretchyNav.find('.cd-nav-trigger');

      stretchyNavTrigger.on('click', function(event) {
        event.preventDefault();
        stretchyNav.toggleClass('nav-is-visible');
      });
    });

    $(document).on('click', function(event) {
      (!$(event.target).is('.cd-nav-trigger') && !$(event.target).is('.cd-nav-trigger span')) && stretchyNavs.removeClass('nav-is-visible');
    });
  }
});
!
999px

Console