@media screen and (min-width: 480px) {
  
  /************************************
  TWO COLUMN LAYOUT
  ************************************/
  
  #primary {
    width: 50%;
    float: left;
  }
  #secondary {
    width: 40%;
    float: right;
  }
  
  /************************************
  3 * 5 = 15
  100 - 15 = 85
  85 / 3 = 28.33333333333
  ************************************/

  
  /************************************
  PORTFOLIO PAGE
  ************************************/

  #gallery li {
    width: 28.333333%;
  }
  
  #gallery li:nth-child(2n + 1) {
  clear: initial;
  }
  
  #gallery li:nth-child(3n+1) {
  clear: left;
  }
  
  /************************************
  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: 70%;
  }
  
  #logo {
    float: left;
    margin-left: 5%;
    text-align: left;
    width: 40%;
  }
  
  h1 {
    font-size: 2.5em;
  }
  
  h2 {
    font-size: 0.825em;
    margin-bottom: 20px;
  }
  
  header {
    border-bottom: 5px solid #599a68;
    margin-bottom: 60px;
  }
}