* {
  box-sizing: border-box;
}

#toolbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3rem;
  padding: 0;
  display: flex;
  background: linear-gradient(0deg, #EEE, #FFF);
  border-bottom: 1px solid #DDD;
}

#toolbar img {
  height: 100%;
}

#toolbar span, #toolbar button, #toolbar select {
  margin: 0.5rem;
}

#toolbar button.hidden {
  display: none;
}

#toolbar span {
  align-items: center;
  display: inline-flex;
  font-family: sans-serif;
  font-size: 1.5rem;
  font-weight: bold;
}

#toolbar .spanner {
  flex: 1;
}

#editor {
  position: fixed;
  top: 3rem;
  left: 0;
  right: 0;
  bottom: 20rem;
  font-size: 1.0rem;
}

#output {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: 20rem;
  border-top: 1px solid #DDD;
}

a.button {
  -webkit-appearance: button;
  -moz-appearance: button;
  appearance: button;
  text-decoration: none;
  color: initial;
}

#output {
  font-family: monospace;
  overflow-y: hidden;
  overflow-x: hidden;
  padding: 0.5rem;
  background-color: black;
}