body {
  font-family: system-ui, sans-serif;
  background-color: #f7f7f7;
  margin: 0;
  padding: 2rem;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}
.container {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  max-width: 400px;
  width: 100%;
}
input {
  display: block;
  width: 100%;
  margin: 0.5rem 0;
  padding: 0.5rem;
  font-size: 1rem;
}
button {
  background: #007aff;
  color: white;
  border: none;
  padding: 0.75rem;
  width: 100%;
  margin-top: 1rem;
  font-size: 1rem;
  cursor: pointer;
  border-radius: 6px;
}
pre {
  background: #f0f0f0;
  padding: 1rem;
  margin-top: 1rem;
  font-size: 0.9rem;
  white-space: pre-wrap;
}