body { font-family: Arial, sans-serif; max-width: 800px; margin: 0 auto; padding: 20px; }    .success-box { background-color: #d4edda; color: #155724; padding: 15px; border-radius: 5px; }    h1 { color: #3498db; }    .info-box { background-color: #e2f3f5; padding: 15px; border-radius: 5px; margin-top: 20px; }