I can't get past the challenge question, I have sans-serif as my backup font, what am I doing wrong?

body {
  font-family: 'Raleway' , 'sans-serif';
}

 #wrapper {
   max-width: 940px;
   margin: 0 auto;
   padding: 0 5%;
}
a {
  text-decoration: none;
}

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

h1 {
  font-family: 'Raleway', 'Sans-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: nromal;
}
a {
  color: #6ab47b 
}

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

h1, h2 {
  color: #fff;
}

nav {
  background: #599a66;
}
nav a, nav a:visited {
  color: #fff;
}

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

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

nav {
  text-align: center;
  padding: 10px 0;
  margin: 20px 0 0;
}

footer{
  font-size: 0.75em;
  text-align: