Sample sass code for a header. Uses Bourbon and Neat libraries.

header.scss

@import "../bourbon/bourbon";
@import "../neat/neat";
@import url(http://fonts.googleapis.com/css?family=Lato:100,300,400,700,900);
 
body {
  /*font-family: $lucida-grande;*/
  font-family: 'Lato', sans-serif;
}
 
  $header-height: 65px;
  $nav-link-color: #555;
 
.header-wrapper {
  @include outer-container(100%);
  // Underline
  border-width: 0 0 2px 0;
  @include border-image(
    linear-gradient(
      90deg,
      white,
      #bbb 12%,
      #bbb 20%,
      #eee 40%,
      #eee 45%,
      #bbb 68%,
      #bbb 80%,
      white 100%
    ) 0 0 1 0 stretch
  );
  // TODO Write function to take into account 80% vs 100% containers
}
 
header.navigation {
 
  /*@include outer-container(80%);*/
  max-width: 80%;
  margin: 0 auto;
 
  a {
    text-decoration: none;
    color: $nav-link-color;
  }
 
  min-height: $header-height;
  width: 100%;
  position: relative;
 
 
  .title-name {
    font-size: 2em;
    font-weight: 700;
    color: black;
    position: absolute;
    left: 0;
    bottom: 0;
    line-height: 40px;
    padding-bottom: 5px;
    letter-spacing: 0.05em;
  }
 
  ul.nav-menu {
    list-style: none;
    /*clear: both;*/
    /*display: none;*/
    position: absolute;
    overflow: visible;
    width: 70%;
    margin: 0;
    bottom: 0;
    right: 0;
    padding-right: 1.5em;
  }
 
  li.nav-link {
    display: block;
    width: 7em;
    float: right;
    /*padding: 0 1.5em;*/
    line-height: 40px;
    text-align: center;
    a {
      font-size: 1.2em;
      letter-spacing: 0.1em;
      @include transition(all 0.25s ease-in-out);
      &:hover {
        color: darken($nav-link-color, 40%);
        letter-spacing: 0.15em;
        /*li.nav-link &{*/
          /*left-padding: 1.35em; */
        /*}*/
      }
    }
  }
}