style.css

#search-box {
  margin: 1em 1em 3em;
  width: calc(100% - 2em);
  padding: 1em;
  border: 1px solid #ccc;
  border-radius: 2px;
  box-sizing: border-box;
}

#facet-list,
#container{
  max-width: 150px;
  width: 100%;
  float: left;
  padding: 0 1em;
  margin: 0;
  list-style: none;
}

#facet-list li {
  padding: 6px 0;
  border-bottom: 1px solid #ccc;
}
#facet-list li input {
  margin-right: 6px;
}

#container {
  max-width: 500px;
}
#container li {
  padding: 8px 0;
}

#container em {
  background: yellow;
}

#wrapper {
    margin-left: auto;
    margin-right: auto;
    margin-top: 5%;
    margin-bottom: 25%;
    width: 1000px;
    border: 0px;
    overflow: hidden; /* will contain if #first is longer than #second */
}

#header-wrapper {
	background-color: blue;
}

#content-wrapper {
	width: 1000px;
	height: 750px;
	background-color: white;
}

#first {
    width: 300px;
    float:left; /* add this */
    border: 0px;
}

#second {
    border: 0px;
    width: 500px;
	height: 500px;
    float: left; /* add this */
}

body {
    background: url(resources/graphics/background.png) top left repeat;
    background-repeat: repeat;
}