body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  background: #fafafa;
  color: #333;
}
#app {
  padding: 10px;
}
button {
  background: #ff9800;
  color: white;
  border: none;
  padding: 10px 15px;
  border-radius: 10px;
}