Header doesn't float to the left in larger view

@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;
  }


}

/*********************
GENERAL
*********************/
header{
    float:left;
    margin: 0 0 30px 0;
    padding: 5px 0 0 0;
    width: 100%;
}
body{
    font-family: 'Raleway', sans-serif;
}
#wrapper{
    max-width: 940px;
    margin: 0 auto;
    padding: 0 5%;
}

#logo{
    text-align: center;
    margin: 0;
}

a {
    text-decoration: none;
}

img{
    max-width: 100%;
}
h3{
    margin: 0 0 1em 0;
}
/*********************
HEADING
*********************/

header{
    background: #6ab47b;
    border-color: #599a68;
}

h1{
    font-family: 'Roboto Slab', serif;
    margin 15px 0;
    font-size: 1.75em;
    font-weight: normal;
    line-height:0.8em;
}

h2{
    font-size: 0.75em;
    margin: -5px 0 0;
    font-weight: normal;
}
/*********************
NAVIGATION
*********************/

nav{
    text-align:center;
    padding:10px 0;
    margin:20px 0 0;
}
nav ul {
    list-style:none;
    margin: 0 10px;
    padding: 0;
}

nav li{
     display: inline-block;
}

nav a{
    font-weight: 800;
    padding: 15px 10px;
}
/*********************
FOOTER
*********************/

footer{
    font-size: 0.75em;
    text-align:center;
    clear:both; /*keeps footer from floating*/
    padding-top: 50px;
    color:#ccc;
}

.social-icon{
    width: 20px;
    height: 20px;
    margin: 0 5px;
}
/*********************
PAGE PORTFOLIO
*********************/

#gallery{
    margin:0;
    padding:0;
    list-style: none;
}

#gallery li {
    float:left;
    width: 45%;
    margin: 2.5%; 
    background-color: #f5f5f5;
    color: #bdc3c7;
}

#gallery li a p{
    margin: 0;
    padding:5%;
    font-size: 0.75em;
    color: #bdc3c7;
}

/*********************
PAGE: ABOUT
*********************/

.profile-photo {
    display: block; 
    max-width:150px;
    margin: 0 auto 30px;
    border-radius: 100%;
}

/*********************
PAGE CONTACT
*********************/

.contact-info{
  list-style: none;
  padding:0;
  margin:0;
  font-size: 0.9em;
}

.contact-info a{
  display:block;
  min-height: 20px;
  background-repeat:no-repeat;
  background-size: 20px 20px;
  padding: 0 0 0 30px;
  margin: 0 0 10px;
}

.contact-info li.phone a{
  background-image: url('../img/phone.png');
}

.contact-info li.mail a{
  background-image: url('../img/mail.png');
}

.contact-info li.twitter a{
  background-image: url('../img/twitter.png');
}

/*********************
COLORS
*********************/

h1, h2{
    color: #fff;
}

a {
    color: #6ab47b;
}


nav{
    background: #599a68;
}


nav a, nav a:visited {
    color: #fff;
}


nav a.selected, nav a:hover{
    color: #32673f;
}


body{
    background-color: #fff;
    color: #999;
}