body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: #0b0f19;
  color: #f3f4f6;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}
#root {
  text-align: center;
  padding: 2rem;
  background: #1e293b;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}