JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://twitter.github.io/bootstrap/dist/css/bootstrap.css">
<div class="container">
    <ul class="row-fluid">
        <li class="group">
            <div class="img-thumbnail">
                <a href="#">
                    <img src="http://placehold.it/350x150" style="width:100%;">
                </a>
            </div>
        </li>
        <li class="group">
            <div class="img-thumbnail">
                <a href="#">
                    <img src="http://placehold.it/350x150" style="width:100%;">
                </a>
            </div>
        </li>
        <li class="group">
            <div class="img-thumbnail">
                <a href="#">
                    <img src="http://placehold.it/350x150" style="width:100%;">
                </a>
            </div>
        </li>
        <li class="group">
            <div class="img-thumbnail">
                <a href="#">
                    <img src="http://placehold.it/350x150" style="width:100%;">
                </a>
            </div>
        </li>
        <li class="group">
            <div class="img-thumbnail">
                <a href="#">
                    <img src="http://placehold.it/350x150" style="width:100%;">
                </a>
            </div>
        </li>
        <li class="group">
            <div class="img-thumbnail">
                <a href="#">
                    <img src="http://placehold.it/350x150" style="width:100%;">
                </a>
            </div>
        </li>
        <li class="group">
            <div class="img-thumbnail">
                <a href="#">
                    <img src="http://placehold.it/350x150" style="width:100%;">
                </a>
            </div>
        </li>
        <li class="group">
            <div class="img-thumbnail">
                <a href="#">
                    <img src="http://placehold.it/350x150" style="width:100%;">
                </a>
            </div>
        </li>
    </ul>
</div>

CSS

.row-fluid {
  padding-left: 0;
  list-style: none;
}
.row-fluid:before,
.row-fluid:after {
  content: " ";
  /* 1 */

  display: table;
  /* 2 */

}
.row-fluid:after {
  clear: both;
}
.row-fluid:before,
.row-fluid:after {
  content: " ";
  /* 1 */

  display: table;
  /* 2 */

}
.row-fluid:after {
  clear: both;
}
@media (min-width: 768px) {
  .row-fluid {
    margin-left: -10px;
    margin-right: -10px;
  }
}
.row-fluid .row {
  margin-left: -10px;
  margin-right: -10px;
}
.row-fluid .group {
  position: relative;
  min-height: 1px;
  padding-left: 10px;
  padding-right: 10px;
  float: left;
  width: 50%;
  margin-bottom: 20px;
}
@media (max-width: 400px) {
  .row-fluid .group {
    position: relative;
    min-height: 1px;
    padding-left: 10px;
    padding-right: 10px;
    float: left;
    width: 100%;
  }
}
@media (min-width: 768px) and (max-width: 991px) {
  .row-fluid .group {
    position: relative;
    min-height: 1px;
    padding-left: 10px;
    padding-right: 10px;
    float: left;
    width: 33.33333333333333%;
  }
}
@media (min-width: 992px) {
  .row-fluid .group {
    position: relative;
    min-height: 1px;
    padding-left: 10px;
    padding-right: 10px;
    float: left;
    width: 25%;
  }
}