CSS not validating - 2 errors

/*****************
 GENERAL
******************/

body {
  font-family: 'Vollkorn', serif;
}

#wrapper{
  max-width: 940px;
  margin: 0 auto;
  padding: 0 5%;
  }

a {
    text-decoration:none; 
  }

img {
  max-width: 100%;
}

h3 {
  margin: 0 0 1em 0;
}



/*****************
 HEADING
******************/

header {
  float: left;
  margin: 0 0 30px 0;
  padding: 5px 0 0 0;
  width:100%;
}

body {
  float: left;
  margin: 0;
  padding: 0;
  width: 100%;
}

/* had to use the additional body code to irradicate the top white border*/ 


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

h1 {
  font-family: 'Lora', 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: 700;
  padding: 15px 10px;
}

/*****************
FOOTER
******************/

footer {
  font-size: 0.75em;
  text-align: center;
  clear:both;
  padding-top: 50px;
  color: #bbb;
}


.social-icon {
  width: 20px;
  height: 20px;
  margin: 0 5px;
}

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

/* the % of width, regardless of page size, each img will only take up that % ofthe parent element */

/* # is an id selctor*/
******************/


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

}
/* list-style: none  simply removes the bullet points */


#gallery li { 
  list-style: none;
  float: left;
  width: 45%;
  margin: 2.5%;
  background-color: #f5f5f5;
  color:#bdc3c7;
}


#gallery li a p {
  list-style: none;
  margin: 0;
  padding: 5%;
  font-size: 0.75em;
  color: #bdc3c6;
}


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

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

/* auto margins will center the photo, much like the div wrapper did */


/*****************
 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.mail a {
  background-image:url('../IMG/mail.png');
}


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

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




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


/*site body*/

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


/* purple header*/

header {
    background: #2a144d;
    border-color: #0000ff;
}


/*nav background on mobile */
nav {
    background: #ff6600;
}


/* logo text */
h1, h2 {
  color: #fff;
}

/* links */
a {
 color: #00CCFF;  
}



/* nav links */
nav a, nav a: visited {
    background: #00CCFF;

}

/* selected nav link color */
nav a.selected, nav a:hover {
  color:#fff;
}