html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  display: block;
}

.full-left,
.top-right,
.bottom-right {
  width: calc(49% - 80px);
  display: block;
  position: absolute;
  padding: 40px;
}

.full-left {
  top: 0;
  left: 0;
  height: calc(100% - 80px);
}

.top-right {
  right: 0;
  top: 0;
  height: calc(69% - 80px);
}

.bottom-right {
  right: 0;
  bottom: 0;
  height: calc(29% - 80px);
}

#editor {
  width: calc(100% - 4px);
  height: calc(100% - 4px);
  margin: 0;
  border: none;
  resize: none;
  padding: 0;
}

#editor:focus {
  outline: none;
  box-shadow: none;
}

#output,
#output iframe {
  width: 100%;
  height: 100%;
  display: block;
}