Powerlist floats to flexbox

by Troy Johnson

HTML

<ul class="flex-container">
    <li class="flex-item"><strong><a href="http://powerlist.info/power-list.php?header=Winter 2015 - Paperback - Fiction" />Paperback Fiction</strong>

        <br />
        <img alt="#1 Bestseller Americanah by Chimamanda Ngozi Adichie" class="bookimage-header" style="height: 175px;" src="http://powerlist.info/images/powercovers/9780307455925p.jpg" />
        </a>
        <br /><em>Americanah</em>

        <br />by Chimamanda Ngozi Adichie
        <br /><a href="http://powerlist.info/power-list.php?header=Winter 2015 - Paperback - Fiction" />(Read Full List)</a>
    </li>
    <li class="flex-item">
<strong><a href="http://powerlist.info/power-list.php?header=Winter 2015 - Hardcover - Fiction" />Hardcover<br />Fiction</strong>
        <br />
        <img alt="#1 Bestseller Rose Gold by Walter Mosley" class="bookimage-header" style="height: 175px;" src="http://powerlist.info/images/powercovers/9780385535977p.jpg" />
        </a>
        <br /><em>Rose Gold</em>
        <br />by Walter Mosley
        <br /><a href="http://powerlist.info/power-list.php?header=Winter 2015 - Hardcover - Fiction" />(Read Full List)</a>
    </li>
    <li class="flex-item">
<strong><a href="http://powerlist.info/power-list.php?header=Winter 2015 - Paperback - Non-Fiction" />Paperback<br />Non-Fiction</strong>
        <br />
        <img alt="#1 Bestseller Super Shred: The Big Results Diet: 4 Weeks, 20 Pounds, Lose It Faster! by Ian K. Smith, M.D." class="bookimage-header" style="height: 175px;" src="http://powerlist.info/images/powercovers/9781250061201p.jpg" />
        </a>
        <br /><em>Super Shred: The Big Results Diet: 4 Weeks, 20 Pounds, Lose It Faster!</em>
        <br />by Ian K. Smith, M.D.
        <br /><a href="http://powerlist.info/power-list.php?header=Winter 2015 - Paperback - Non-Fiction" />(Read Full List)</a>
    </li>
    <li class="flex-item">
<strong><a href="http://powerlist.info/power-list.php?header=Winter 2015 - Hardcover -...

CSS

.flex-container {
    padding: 0;
    margin: 0;
    list-style: none;
    display: -webkit-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-flex-flow: row wrap;
    -webkit-justify-content: space-around;
        -ms-flex-pack: distribute;
            justify-content: space-around;
}
.flex-item {
    background: #fff;
    padding: 5px;
    width: 240px;
    margin-top: 10px;
    text-align: center;
}