body {
  background: #111;
  color: #eee;
  font-family: Consolas, monospace;
  margin: 0;
  padding: 20px;
}

#app {
  width: 800px;
  margin: 0 auto;
}

#prompt {
  width: 100%;
  height: 120px;
  background: #222;
  color: #eee;
  border: 1px solid #444;
  padding: 10px;
}

#send {
  margin-top: 10px;
  padding: 10px 20px;
  background: #444;
  color: #eee;
  border: none;
  cursor: pointer;
}

.json-box {
  background: #222;
  border: 1px solid #444;
  padding: 20px;
  margin-top: 20px;
  white-space: pre-wrap;
  overflow-x: auto;
}

#history {
  max-height: 300px;
  overflow-y: auto;
}

#history pre {
  margin-bottom: 20px;
}