@media screen and (min-width: 480px){
  
  
    /******************
    TWO COLUMN LAYOUT
    ******************/
  
    #primary {
      width: 50%;
      float: left;
    }
  
    #secondary {
      width: 40%;
      float: right;
    }
  
    /******************
    PAGE: PORTFOLIO
    ******************/
  
    #gallery li {
      width: 28.3333%;
    }
  
    #gallery li:nth-child(4n) {
      clear: left;
    }
      
    /******************
    PAGE: ABOUT
    ******************/
      
    .profile-photo {
      float: left;
      margin: 0 5% 80px 0;
    }
}

@media screen and (min-width: 660px){
 
    /******************
    HEADER
    ******************/  
  
    nav {
      background: none;
      float: right;
      font-size: 1.25em;
      margin-right: 5%;
      text-align: right;
      width: 45%;
    }
  
    #logo {
      float: left;
      margin-left: 5%;
      text-align: left;
      width: 45%;
    }
  
    h1 {
      font-size:2.5em;
    }
  
    h2 {
      font-size: 0.825em;
      margin-bottom: 20px;
    }
  
    header {
      border-bottom: 5px solid #599a68;
      margin-bottom: 60px;
    }
  
  
}