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CSS How to Make a Website Adding Pages to a Website Make an About Page

Bummer! just add one image...?

im not sure what im missing or if i added something to the mix that shouldnt have been?

about.html
<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>modifiedforforum | modifiedforforum</title>
    <link rel="stylesheet" href="css/normalize.css">
    <link href='http://fonts.googleapis.com/css?family=Open+Sans:400italic,700italic,800italic,800,400' rel="stylesheet" type='text/css'>
     <link rel ="stylesheet" href="css/main.css">
</head>
    <body>
        <header>
            <a href="index.html"id="logo">
            <h1>modifiedforforum</h1>
            <h2>modifiedforforum</h2>
            </a>
            <nav>
                <ul>
                    <li><a href="index.html"class-"selected">portfolio</a></li>
                    <li><a href="about.html">about</a></li>
                    <li><a href="contact.html">contact</a></li>
                </ul>
            </nav>
        </header>
    <div id="wrapper">
      <section>
        <ul id="gallery">
         <li>
          <a href="img/1.pdn">
            <img src="img/1.pdn" alt="">
              <p> Experimentation with color and texture.</p>       
          </a> 
        </li>
          <li>
          <a href="img/2.png">
            <img src="img/2.png" alt="">
              <p> Experimentation with color and texture.</p>       
          </a> 
        </li><li>
          <a href="img/3.jpg">
            <img src="img/3.jpg" alt="">
              <p> Experimentation with color and texture.</p>       
          </a> 
        </li><li>
          <a href="img/5.png">
            <img src="img/5.png" alt="">
              <p> Experimentation with color and texture.</p>       
          </a> 
        </li><li>
          <a  href="img/4.jpg">
            <img src="img/4.jpg" alt="">
              <p> Experimentation with color and texture.</p>       
          </a> 
        </li>    
        </ul>
      </section>
      <footer>
        <a href="http://twitter.com/nickrp"><img src="img/twitter-wrap.png" alt="Twitter Logo"class="social-icon"></a>

  <a href="http://facebook.com/nickpettit"><img src="img/facebook-wrap.png" alt="Facebook Logo"class="social-icon"></a>
        <p>&copy; 2015 cypher aiken. </p>
       </footer>
      </div>
    </body>
</html>
css/main.css
/*****************
GENERAL
******************/

body {
  font-family: 'Open Sans', sans-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%;
}

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

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

h2  { font-size: 0.75em;
  margin: -5pc 0 0;
  font-weight: normal;
}
/*  links  */
a {
  color: #6ab47b:
}

/*****************
NAVIGATION
******************/
nav { text-align: center;
  padding: 10xp 0;
  margin: 20px 0 0;
} 

nav ul {
list-style: none;
margin: 0 10px;
padding: 0;
}

nav li {
 display: inline-block;   
}

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


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

  footer  { font-size: 0.75;
  text-align: center;
  clear: both;
  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: #bdc4c7;
}

#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%;
}
/****************
COLORS
*****************/

/*  green header  */
Header {
  background: #6ab47b
    border-color:88a59;
}
/* logo text */
h1, h2 {
  color: #a35;
}

/*  nav backround on mobile  */
nav {
  background: #599ab8;
}
/* nav link */
nav a:visited {
  color: #aaa
}
/* selected nav link */
nav a.slected, nav a:hover {
 color: #32673f; 
}

/*  site body  */
body {
 background-color: #fff;
  color: #999;
}

p {
  color: #000;
}

2 Answers

I can see you have an issue with your html where you've put class- instead of class=

The error is within your header > nav > ul

shown here:

<body>
        <header>
            <a href="index.html"id="logo">
            <h1>modifiedforforum</h1>
            <h2>modifiedforforum</h2>
            </a>
            <nav>
                <ul>
                    <!-- Error in line below -->
                    <li><a href="index.html"class-"selected">portfolio</a></li>
                    <li><a href="about.html">about</a></li>
                    <li><a href="contact.html">contact</a></li>
                </ul>
            </nav>
        </header>

Let me know after you fix that if it works or not.

Cheers, Mike.

EDIT:

You've also got wrong file format here for image within your html under #wrapper > #gallery

<li>
          <a href="img/1.pdn">
            <img src="img/1.pdn" alt="">
              <p> Experimentation with color and texture.</p>       
          </a> 
        </li>

be sure to replace .pdn with the correct file extension ( .jpg .png .gif )

What's the problem you're really heaving? None image loads?