body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  background: #f5f7fa;
  color: #333;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  text-align: center;
  max-width: 600px;
  padding: 2rem;
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}