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CSS

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HTML

            
              <nav>
    <div class="container">
        <input id="responsive-menu" type="checkbox">
        <label for="responsive-menu">Menu <span id="menu-icon"></span></label>
        <div id="overlay"></div>
        <ul>
            <li><a href="http://art.yale.edu/">Yale University School of Art</a></li>
            <li><a href="http://www.suzannecollinsbooks.com/">Suzanne Collins</a></li>
            <li><a href="http://www.arrestling.com/index.htm">Gulla’s Arrestling</a></li>
            <li><a href="http://www.roverp6cars.com/">MGBD Parts &amp; Services</a></li>
            <li><a href="http://www.irishwrecksonline.net/">Irish Shipwrecks Online</a></li>
            <li><a href="http://www.arngren.net/">Arngren</a></li>
            <li><a href="https://www.lingscars.com/">Ling's Cars</a></li>
            <li><a href="http://www.007museum.com/">JAMES BOND 007 MUSEUM</a></li>
            <li><a href="http://www.dokimos.org/ajff/">ACCEPT JESUS, FOREVER FORGIVEN!</a></li>
            <li><a href="http://ronoslund.com/">Ron Oslund's Home Page</a></li>
        </ul>
        <ul id="social-media">
            <li>
                <a href="https://dribbble.com/erinesullivan">
                    <i class="fab fa-dribbble"></i>
                    <span class="screen-reader-text">Dribbble</span>
                </a>
            </li>
            <li>
                <a href="http://codepen.io/erinesullivan/">
                    <i class="fab fa-codepen"></i>
                    <span class="screen-reader-text">CodePen</span>
                </a>
            </li>
            <li>
                <a href="https://twitter.com/erin_e_sullivan">
                    <i class="fab fa-twitter"></i>
                    <span class="screen-reader-text">Twitter</span>
                </a>
            </li>
            <li>
                <a href="https://www.linkedin.com/in/erinesullivan1">
                    <i class="fab fa-linkedin"></i>
                    <span class="screen-reader-text">LinkedIn</span>
                </a>
            </li>
            <li>
                <a href="https://www.instagram.com/erin_e_sullivan/">
                    <i class="fab fa-instagram"></i>
                    <span class="screen-reader-text">Instagram</span>
                </a>
            </li>
        </ul>
    </div>
</nav>

<main>
    <div class="container">
        <h1>Responsive Menu</h1>
        <p>This accessible and responsive menu was made with just HTML and CSS.</p>
        <p>If you need more help with your <a href="http://justinfarrow.com/ning.html">Ning Community</a> let <a href="https://creators.ning.com/members/JFarrow">JFarrow know</a>. 
    </div>
</main>
            
          
!

CSS

            
              @import url(https://use.fontawesome.com/releases/v5.0.6/css/all.css);
@import url(https://fonts.googleapis.com/css?family=Oswald:400|Raleway:400,700,400italic,700italic);

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

html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    background-color: #1d1f20;
    color: #e5e5e5;
    font: 16px/1.25 'Raleway', sans-serif;
}

h1 {
    font-family: 'Oswald', sans-serif;
    text-align: center;
}

a {
    color: #a2ed56;
}

a:hover {
    color: #83e4e2;
    text-decoration: none;
}

.container {
    margin: 0 auto;
    max-width: 80em;
}

main .container {
    padding: 1em;
}

p {
    margin-left: auto;
    margin-right: auto;
    max-width: 40em;
}

.screen-reader-text {
    clip: rect(1px 1px 1px 1px);
    clip: rect(1px, 1px, 1px, 1px);
    height: 1px;
    overflow: hidden;
    position: absolute !important;
    width: 1px;
}



/************************************************/
/****************** NAVIGATION ******************/
/************************************************/
nav {
    background: #e5e5e5;
    color: #1d1f20;
    left: 0;
    position: relative;
    top: 0;
    width: 100%;
    z-index: 9999;
}

/*** INPUT ***/
nav input {
    opacity: 0;
    position: absolute;
    z-index: -1;
}

/*** LABEL ***/
nav label {
    cursor: pointer;
    display: block;
    font: 2em/1 'Oswald', sans-serif;
    padding: 0.5em;
}

/* Hamburger Icon */
#menu-icon,
#menu-icon:before,
#menu-icon:after {
    background: #1d1f20;
    border-radius: 0.05em;
    height: 0.2em;
    transition: all 0.2s ease-in-out;
    width: 100%;
}

#menu-icon {
    display: inline-block;
    margin: 0.4em 0;
    max-width: 1em;
    position: relative;
}

nav label #menu-icon {
    float: right;
}

#menu-icon:before,
#menu-icon:after {
    content: '';
    left: 0;
    position: absolute;
}

#menu-icon:before {
    top: -0.4em;
}

#menu-icon:after {
    bottom: -0.4em;
}

/* Close Icon */
nav input[type=checkbox]:checked + label #menu-icon {
    background: transparent;
}

nav input[type=checkbox]:checked + label #menu-icon:before {
    top: 0;
    transform: rotate(-45deg);
}

nav input[type=checkbox]:checked + label #menu-icon:after {
    bottom: 0;
    transform: rotate(45deg);
}


/*** MENU ***/
/* Overlay */
nav input:checked ~ #overlay {
    background: #e5e5e5;
    bottom: 0;
    left: 0;
    height: 100vh;
    position: fixed;
    right: 0;
    top: 0;
    width: 100vw;
    z-index: -1;
}

/* List */
nav ul {
    font-size: 1.5em;
    list-style: none;
    margin: 0;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    padding: 0;
    text-align: center;
}

nav input:checked ~ ul {
    margin: 1em;
    max-height: inherit;
    opacity: 1;
}

nav ul > li {
    margin: 0.5em 0;
}

nav ul a {
    color: #1d1f20!important;
    text-decoration: none;
}

nav ul a:hover {
    text-decoration: underline;
}

/* Social Media */
nav ul#social-media > li {
    display: inline-block;
    font-size: 1.5em;
    margin: 0.5em;
}
            
          
!

JS

            
              
            
          
!
999px

Console