ensl.org/app/assets/stylesheets/layout/_navigation.scss

/*
  Navigation
*/

$navigation-height: 50px;

#menu {
  @include span-columns(12);
  font-family: $header-font-family;
  height: $navigation-height;
  margin-top: -50px;
  background: image-url('layout/nav-background.png') top center repeat-x;
  height: 100px;
  
  nav {
    @include outer-container;
  }
}

ul.navigation {
  z-index: 100;
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
  float: right;
  max-width: $max-width;
  max-height: 60px;
  margin-top: 5px;

  > li {
    float: left;
    border: none;
    height: 60px;
    position: relative;

    a {
      font-weight: 400;
      font-size: 15px;
      height: $navigation-height;
      line-height: $navigation-height;
      padding: 0 20px;
      text-transform: uppercase;
      color: #5f5f5f;

      &:hover,
      &.active {
        color: #3dcfff;
      }
    }

    > a {
      width: 100%;
      float: left;
      position: relative;
      border-top: 1px solid #54585b;

      &:before,
      &:after {
        @include box-sizing(border-box);
        display: block;
        content: '';
        position: absolute;
        width: 1px;
        height: 100%;
        top: 0;
      }
      
      &:before {
        @include linear-gradient(#54585b, #15181a);
        left: 0;
      }

      &:after {
        @include linear-gradient(#54585b, #15181a);
        right: -1px;
      }

      &:hover,
      &.active {
        @include background-image(radial-gradient(50% -10%, ellipse cover, transparentize(#2abdfb, 0.6), transparent 60%));
        border-top: 1px solid #266d98;

        &:before,
        &:after {
          @include linear-gradient(#266d98, #15181a);
          z-index: 100;
        }
      }
    }

    &.dropdown {
      position: relative;

      ul {
        background: image-url('layout/drop-menu-background.png') top center repeat-y;
        width: 130px;
        position: absolute;
        box-shadow: $content-shadow;
        visibility: hidden;
        pointer-events: none;
        opacity: 0;
        z-index: 10;
        top: 60px;
        left: 0;
        min-width: 100%;
        list-style: none;
        padding: 0;
        margin: 0;
      }

      &:hover {

        ul {
          visibility: visible;
          opacity: 1;
          pointer-events: auto;
          border-radius: $base-border-radius;

          li {
            
            a {
              white-space: nowrap;
              display: block;
              padding: 0 20px;
              line-height: 40px;
              height: 40px;
              font-size: 12px;
            }

            &:hover a {
              
            }
          }
        }
      }
    }
  }
}