* {
  margin: 0;
  padding: 0;
}

textarea {
  width: 100%;
  margin: 20px auto 50px;
  height: 200px;
  resize: vertical;
  border-radius: 4px;
  border-color: #999;
}

.container {
  background: #e3e3e3;
  border-right: 1px solid white;
}

.grid {
  width: 50%;
  float: left;
  overflow: hidden;
  box-sizing: border-box;
  -moz-box-sizing: border-box;
  padding: 30px 50px;
}

.output {
  border-left: 1px solid #e3e3e3;
  overflow: hidden;
}

.output iframe {
  border: none;
  width: 100%;
}