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              <nav class="main-nav" role="navigation">
  <ul class="menu">
    <li class="active"><a href="#">Home</a></li>
    <li><a href="#">About</a></li>
    <li><a href="#">Bio</a></li>
    <li class="menu-item-has-children"><a href="#">Projects</a>
      <ul class="sub-menu">
        <li><a href="1">Art Projects</a></li>
        <li><a href="2">Photo</a></li>
        <li class="menu-item-has-children"><a href="3">Web Development</a>
            <ul class="sub-menu">
                <li><a href="4">Vanilla</a></li>
                <li><a href="5">Chocolate</a></li>
                <li><a href="6">Swirl Sukka</a></li>
            </ul>
        </li>
      </ul>
    </li>
    <li><a href="#">Contact</a></li>
  </ul>
</nav>

<section class="info">
  <p>A bare bones nav menu that is semantic and accessible.</p>
</section>
            
          
!
            
              @import "compass/css3";

//demo
.info {
  display:block;
  clear:both;
  padding:3em 0;
  margin-top:2em;
  p {
    font:2em "Helvetica Neue";
    color:#777;
    width:80%;
    margin:0 auto;
  }
}


a {
  text-decoration:none;
  font-family:'Helvetica Neue';
  color:#222;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}

.main-nav {
  display:block;
  float:left; //just for clearing
  width:100%;
  position: relative;
  //background-color:whitesmoke;
  -webkit-box-shadow:0 1px 5px rgba(0,0,0,.25);
          box-shadow:0 1px 5px rgba(0,0,0,.25);
  .menu {
    float: left; //just for clearing
    //ul
    li {
      float:left;
      position: relative;
      &.menu-item-has-children {
        > a {
          &:after {
            content: "▸";
            position: relative;
            margin-left:0.25em;
            display:inline-block;
           -moz-transform: scale(1) rotate(0deg);
        -webkit-transform: scale(1) rotate(0deg);
             -o-transform: scale(1) rotate(0deg);
            -ms-transform: scale(1) rotate(0deg);
                transform: scale(1) rotate(0deg);
            //transition:transform 100ms ease-in-out;
          }
        }//a
        &:hover > a:after {
            -moz-transform: scale(1) rotate(90deg);
            -webkit-transform: scale(1) rotate(90deg);
            -o-transform: scale(1) rotate(90deg);
            -ms-transform: scale(1) rotate(90deg);
            transform: scale(1) rotate(90deg);
          }
      }//has-children
      a {
        display: block;
        padding:1em 2em;
        text-align:center;
        //transition:all 100ms ease-in-out;
      }
      &.active a {
        background-color:#333;
        color:#fff;
      }
      & > a:hover {
        background-color:#777;
        color:#fff;
      }
      .sub-menu {
        position: absolute;
        left:0;
        top: 100%;
           -moz-transform: scale(0);
        -webkit-transform: scale(0);
             -o-transform: scale(0);
            -ms-transform: scale(0);
                transform: scale(0);
        //transform-origin: top left;
        //transition:all 200ms ease-in;
        li {
          display:block;
          float:none;
          margin-bottom:1px;
          a {
            text-align:left;
            white-space: nowrap;
            //transition:all 200ms ease-in-out;
            &:hover {
              background-color:#ccc;
            }
          }//a
          &:first-child > a{
            border-top:2px solid rgba(0,0,0,0.05);
          }
        }//li
      }//sub-menu
      &:hover > .sub-menu, 
      &.menu-item-has-children a:focus + .sub-menu,
      .sub-menu.active
      {
        -moz-transform: scale(1);
     -webkit-transform: scale(1);
          -o-transform: scale(1);
         -ms-transform: scale(1);
             transform: scale(1);
        a {
          background-color:#eee;
        }
        .sub-menu { // sub sub-menu
          top:0;
          left:100%;
          margin-left:1px;
          li {
            a {
              border-top:0;
            }
          }
        }
      }
    }//li
  }//menu
}//main-nav
            
          
!
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