style.css

body {
  margin: 0;
  padding: 0;
}

.header {
  position: relative;
  margin: 0;
  right: 0;
  left: 0;
  padding: 0 4%;
  top: 0;
  background-color: rgba(116, 116, 116, 1);
  color: #eee;
  height: 50px;
  line-height: 50px;
  width: 100%;
}

.header span {
  font-size: 30px;
  font-weight: bold;
}

.header img {
  height: 45px;
}

.header ul {
  right: 7%;
}

.header ul, .header li, .header a {
  position: relative;
  display: inline;
  float: right;
  color: #ddd;
  margin: 0;
  padding: 0;
  outline: none;
}

a:hover {
  color: #aaa;
  text-decoration: none;
}

.header a:visited, a:active, a:link {
  color: #ddd;
  text-decoration: none;
}

.run {
  display: block;
  float: right;
  margin: 20px 0;
}

.container {
  text-align: center;
}

.main {
  display: inline-block;
  margin: 0;
  padding: 0px 20px 0 20px;
  border: 0;
}

.external-js {
  border-style: solid;
  border-width: 1px;
  color: #dcdcdc;
  font-size: 10px;
  padding: 2px;
  margin-right: 2px;
  font-family: monospace;
}

#player-wrapper {
  min-width: 320px;
  min-height: 180px;
}

.sidebar {
  display: inline-block;
  text-align: left;
  width: 680px;
  margin: 0;
  padding: 40px 20px 0 20px;
  border: 0;
}

#editor {
  border: 1px solid #c0c0EE;
  min-height: 360px;
}

#console {
  position: relative;
  color: red;
  left: 2%;
  top: 65px;
}

.btn:focus { outline: none; }

.player {
  display: inline-block;
  margin: 0 auto;
  height: auto;
  width: auto;
}