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General Discussion

What's wrong with my code? supposed to be 2 columns of images, Portfolio - contact to be horizontal, centered.

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Mary Colette Sheehan | Portfolio</title>
    <link rel="stylesheet" href="css/normalize.css">
    <link href='http://fonts.googleapis.com/css?family=Cinzel:400,700,900|Mate:400italic|Open+Sans:400,300,400italic,700italic' rel='stylesheet' type='text/css'>
    <link rel="stylesheet" href="css/main.css">
    </head>
  <body>
     <header>
      <a href="index.html" id="logo">
        <h1>Mary Colette Sheehan</h1>
        <h2>Digital Arts and Humanities</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="numbers-01.jpg">
               <img src="numbers-01.jpg" alt="">
                <p>Experimentation with color and texture </p>
               </a>
            </li>
              <li>
              <a href="numbers-02.jpg">
                <img src="numbers-02.jpg" alt="">
                  <p>Experimentation with color and texture 1</p>
             </a>
            </li>
              <li>
              <a href="numbers-06.jpg">
                <img src="numbers-06.jpg" alt="">
                  <p>Experimentation with color and texture 2</p>
             </a>
            </li>
              <li>
              <a href="numbers-09.jpg">
                <img src="numbers-09.jpg" alt="">
                  <p>Experimentation with color and texture 3</p>
             </a>
            </li>
            <li>
             <a href="numbers-12.jpg">
              <img src="numbers-12.jpg" alt="">
                <p>Experimentation with color and texture 4</p>
             </a>
            </li>
            </ul>
    </section>

3 Answers

Is this all of your code? Have you included a closing div tag for your wrapper?

Lots of closing tags are missing, like the <body> and <html> tags as well.

Here is all of my code, my twitter and FB info changed. Thanks.

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Mary Colette Sheehan | Portfolio</title>
    <link rel="stylesheet" href="css/normalize.css">
    <link href='http://fonts.googleapis.com/css?family=Cinzel:400,700,900|Mate:400italic|Open+Sans:400,300,400italic,700italic' rel='stylesheet' type='text/css'>
    <link rel="stylesheet" href="css/main.css">
    </head>
  <body>
     <header>
      <a href="index.html" id="logo">
        <h1>Mary Colette Sheehan</h1>
        <h2>Digital Arts and Humanities</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="numbers-01.jpg">
               <img src="numbers-01.jpg" alt="">
                <p>Experimentation with color and texture </p>
               </a>
            </li>
              <li>
              <a href="numbers-02.jpg">
                <img src="numbers-02.jpg" alt="">
                  <p>Experimentation with color and texture 1</p>
             </a>
            </li>
              <li>
              <a href="numbers-06.jpg">
                <img src="numbers-06.jpg" alt="">
                  <p>Experimentation with color and texture 2</p>
             </a>
            </li>
              <li>
              <a href="numbers-09.jpg">
                <img src="numbers-09.jpg" alt="">
                  <p>Experimentation with color and texture 3</p>
             </a>
            </li>
            <li>
             <a href="numbers-12.jpg">
              <img src="numbers-12.jpg" alt="">
                <p>Experimentation with color and texture 4</p>
             </a>
            </li>
            </ul>
    </section>
      <footer>
        <a href="https://twitterxxxx"><img src="twitter-wrap.png" alt="Twitter logo" class="social-icon"></a>
    <a href="http://facebook.xxxxx"> <img src="facebook-wrap.png" alt="Facebook logo" class="social-icon"></a>
      <p>&copy; 2014 Mary C Sheehan.</p>
    </footer>
      </div>
  </body>
 </html>

And here's all of my CSS

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

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

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

a {
text-decoration: none;
}

image {
  max-width:  100%;
}


/************************
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:  'Cinzel', 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:  normal



/**************************
Navigation
***************************/    

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

  nav li  {
    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: right;
      clear:  both;
      padding-top:  50px;
      color:  #ccc;
  }

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

/************************
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;
    }




/************************
Color
*************************/



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

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

 nav {
  background: #599a68;
}

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

a {
  color: #6ab47b;
}

/*nav link*/
nav a, nav a:visited {
  color: white;
}
/*selected nav link*/
nav a.selected, nav a:hover {
  color:#32673f;
}   

Hi Caroline, you have mistake in your CSS, line 54 :

  h2  {
  font-size:  0.75em;
  margin: -5px  0 0;
  font-weight:  normal; /* here you forget semicolon :) */
}    /* this is closing bracket which you forget */

/**************************
Navigation
***************************/