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CSS How to Make a Website Styling Web Pages and Navigation Style the Portfolio

Images showing in one column instead of two.

I followed the video carefully and I have checked if i miss spelled the code , and I couldn't find an error. Why is my webpage still showing the images in one column?

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

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

#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: -5px 0 0;
  font-weight: normal;
}


/************************
NAVIGATION
************************/

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


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

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


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

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

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


/************************
COLOR
************************/

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

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

/* nav background on mobile devices */
nav {
  background: #599a68;
}

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

/* links */
a {
  color: #6ab47b;
}

/* nav link */
nav a, nav a:visited {
  color: #fff;  
}

/* selected nav link */
nav a.selected, nav a:hover {
  color: #32673f;
}
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Long Nguyen | Developer</title>
    <link rel="stylesheet" href="css/normalize.css">
    <link href='http://fonts.googleapis.com/css?family=Changa+One|Open+Sans:400italic,700italic,400,700,800' rel='stylesheet' type='text/css'>
    <link rel="stylesheet" href="css/main.css">
  </head>
  <body>
    <header>
      <a href="index.html" id="logo">
        <h1>Long Nguyen</h1>
        <h2>Developer</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/numbers-01.jpg">
              <img src="img/numbers-01.jpg" alt="">
              <p>Experimentation with color and texture.</p>
            </a>
            <a href="img/numbers-02.jpg">
              <img src="img/numbers-02.jpg" alt="">
              <p>Playing with blending modes in Photoshop.</p>
            </a> 
            <a href="img/numbers-06.jpg">
              <img src="img/numbers-06.jpg" alt="">
              <p>Trying to create an 80's style of glows.</p>
            </a> 
            <a href="img/numbers-09.jpg">
              <img src="img/numbers-09.jpg" alt="">
              <p>Drips created using Photoshop brushes.</p>
            </a> 
            <a href="img/numbers-12.jpg">
              <img src="img/numbers-12.jpg" alt="">
              <p>Creating shapes using repetition.</p>
            </a> 
          </li>
        </ul>
      </section>
      <footer>
        <a href="#"><img src="img/twitter-wrap.png" alt="Twitter Logo"></a>
        <a href="#"><img src="img/facebook-wrap.png" alt="Facebook Logo"></a>
        <p>&copy; 2015 Long Nguyen.</p>
      </footer>
    </div>   
   </body>
</html>

2 Answers

You have all your images in a single li element, whereas they should each be in their own. It looks like you've got your gallery li declaration done properly, so they should move into two columns once you enclose each

<a>
  <img ... >
</a>

portion in its own li.

thank you!!

You added all the images to only one <li> element. They each need their own list element:

    <div id="wrapper">
      <section>
        <ul id="gallery">
          <li>
            <a href="img/numbers-01.jpg">
              <img src="img/numbers-01.jpg" alt="">
              <p>Experimentation with color and texture.</p>
            </a></li>
          <li>
            <a href="img/numbers-02.jpg">
              <img src="img/numbers-02.jpg" alt="">
              <p>Playing with blending modes in Photoshop.</p>
            </a> 
          </li>
            <a href="img/numbers-06.jpg">
              <img src="img/numbers-06.jpg" alt="">
              <p>Trying to create an 80's style of glows.</p>
            </a>
          <li>
              <a href="img/numbers-09.jpg">
              <img src="img/numbers-09.jpg" alt="">
              <p>Drips created using Photoshop brushes.</p>
            </a>
          </li> 
          <li> 
              <a href="img/numbers-12.jpg">
              <img src="img/numbers-12.jpg" alt="">
              <p>Creating shapes using repetition.</p>
            </a> 
          </li>
        </ul>
      </section>
      <footer>
        <a href="#"><img src="img/twitter-wrap.png" alt="Twitter Logo"></a>
        <a href="#"><img src="img/facebook-wrap.png" alt="Facebook Logo"></a>
        <p>&copy; 2015 Long Nguyen.</p>
      </footer>
    </div>

Thank you for letting me know! you are correct, but I gotta give best answer to the person whom answered first.