body {
  margin: 0;
  font-family: sans-serif;
}

#layout {
  display: flex;
  height: calc(100vh - 60px);
}

textarea {
  width: 50%;
  height: 100%;
  border: none;
  outline: none;
  padding: 15px;
  font-size: 16px;
  resize: none;
}

#preview {
  width: 50%;
  padding: 20px;
  overflow-y: scroll;
  background: #fafafa;
}

#saveBtn {
  width: 100%;
  height: 60px;
  font-size: 20px;
  font-weight: bold;
  border: none;
  background: #007aff;
  color: white;
  cursor: pointer;
}

#saveBtn:active {
  background: #0051a8;
}