body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f5f5f5;
}

.container {
  max-width: 900px;
  margin: 40px auto;
  background: white;
  padding: 24px;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.narrow {
  max-width: 420px;
}

textarea, input, select {
  width: 100%;
  margin: 8px 0 16px;
  padding: 10px;
  font-size: 16px;
  box-sizing: border-box;
}

button {
  padding: 10px 16px;
  font-size: 16px;
  margin-right: 10px;
  cursor: pointer;
}

.actions {
  margin-top: 12px;
}

.hidden {
  display: none;
}

.warning {
  background: #fff3cd;
  padding: 10px;
  border-radius: 8px;
}

.error {
  color: #b00020;
}

pre {
  white-space: pre-wrap;
  background: #fafafa;
  padding: 10px;
  border-radius: 8px;
  overflow-x: auto;
}

hr {
  margin: 24px 0;
}