:root { font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif; }
body { margin: 0; background: #f6f7fb; color: #111; }

.wrap { max-width: 900px; margin: 40px auto; padding: 0 16px; }

.card {
  background: white;
  border-radius: 12px;
  padding: 16px;
  margin: 16px 0;
  box-shadow: 0 8px 20px rgba(0,0,0,0.06);
}

button {
  padding: 10px 12px;
  border: 1px solid #ddd;
  background: #fff;
  border-radius: 10px;
  cursor: pointer;
}

button:hover { background: #f2f2f2; }

pre {
  background: #0b1020;
  color: #e8e8e8;
  padding: 12px;
  border-radius: 10px;
  overflow: auto;
  min-height: 2.2em;
}