as scss

gistfile1.scss

#header { 
  margin: 30px 0; 
  .logo { 
    float: left; 
    width: 12.5%; 
    margin: 0 10px;
    img {
      max-width: 100%; 
    }
    .seperator { 
      display: none; 
      position: absolute; 
      width: 30px; 
      top: 0; 
      bottom: 0; 
      left: -30px; 
      background: transparent url('/assets/background/search-sep.png') repeat-y left top; 
    }
  }
  .header_main { 
    margin-left: 14.583333333333%; 
  }
}