@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: 1.125em;
    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;
  }  
}