* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: #0f172a;
  color: #e5e7eb;
}

.container {
  max-width: 700px;
  margin: 10vh auto;
  padding: 2rem;
  background: #020617;
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

h1 {
  margin-top: 0;
  color: #22c55e;
}

button {
  margin-top: 1rem;
  padding: 0.6rem 1rem;
  font-size: 1rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  background: #2563eb;
  color: white;
}

button:hover {
  background: #1d4ed8;
}

pre {
  margin-top: 1rem;
  padding: 1rem;
  background: #020617;
  border: 1px solid #1e293b;
  border-radius: 4px;
  white-space: pre-wrap;
}