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

nav.top {
  $navigation-background: $medium-gray;
  $navigation-color: transparentize(white, 0.3);
  $navigation-color-hover: white;
  $navigation-height: em(40);

  background-color: $navigation-background;
  border-bottom: 1px solid $medium-gray;
  font-family: $montserrat;
  height: $navigation-height;
  width: 100%;
  z-index: 999;

  .menu-wrapper {
    @include outer-container;
    position: relative;
    z-index: 9999;
  }

  .navigation-menu-button {
    color: $navigation-color;
    cursor: pointer;
    display: block;
    float: right;
    font-family: $montserrat;
    font-weight: 700;
    line-height: $navigation-height;
    margin: 0;
    padding-right: 1em;
    text-transform: uppercase;

    @include media ($large-screen) {
      display: none;
    }

    &:hover {
      color: $navigation-color-hover;
    }
  }

  .nav {
    @include media ($large-screen) {
      float: left;
    }
  }

  #navigation-menu {
    @include span-columns(12);

    .gathers {
      @include span-columns(6);
    }

    .pages {
      @include span-columns(6);
      @include omega;

      text-align: right;

      li:last-child {
        padding-right: 0;
      }
    }
  }

  #navigation-menu ul {
    -webkit-transform-style: preserve-3d; // stop webkit flicker
    display: none;
    margin: 0 auto;
    overflow: hidden;
    padding: 0;
    width: 100%;
    z-index: 9999;

    @include media ($large-screen) {
      display: block;
      margin: 0;
      padding: 0;
    }
  }

  ul li {
    background: $navigation-background;
    display: block;
    line-height: $navigation-height;
    overflow: hidden;
    padding-right: .8em;
    text-align: right;
    width: 100%;
    z-index: 9999;

    @include media ($large-screen) {
      background: transparent;
      display: inline;
      line-height: $navigation-height;
      padding-right: 2em;
      text-decoration: none;
      width: auto;
    }

    a {
      font-weight: 400;
      color: $navigation-color;

      &:hover {
        color: $navigation-color-hover;
      }
    }
  }
}

header .banner {  
  @include linear-gradient($dark-blue, #12526E);
  height: em(295);

  #logo {
    @include span-columns(9 of 12);
    min-height: em(200);
    position: relative;

    img {
      width: em(430);
      height: em(200);
      position: absolute;
      top: em(20);
      left: 0;
      z-index: 1;
    }
  }

  #authentication {
    @include span-columns(3 of 12);
    height: em(190);
    margin: em(20) 0;
    padding: em(20) 0;
    color: white;

    a {
      color: white;
    }

    form {
      display: inline;
    }

    .fields { 
      @include span-columns(12);

      input {
        @include span-columns(6);
        margin-bottom: em(10);
      }
    }

    .controls {
      margin-top: em(20);
      text-align: right;

      input {
        @include span-columns(12);
        margin-bottom: em(10);
      }

      a {
        @include span-columns(12);
        text-align: left;
      }
    }

    .password-reset {
      float: right;
    }

    .links,
    .profile {
      @include span-columns(6);
    }

    .links {
      position: relative;

      h5 {
        margin-bottom: 1em;
      }

      li i {
        display: inline-block;
        width: 1em;
        text-align: center;
        margin-right: em(10);
      }
    }

    .profile {

      .avatar {
        @include span-columns(12);
        background: transparentize($light-gray, 0.5);
        margin: 0 em(20) em(20) 0;
        text-align: center;
        border-radius: 75px;

        img {
          padding: em(10);
          float: left;
        }
      }

      .timezone {
        text-align: center;
      }
    }
  }
}