body{margin:0;font-family:Arial,sans-serif;background-color:#f5f5f5}.container{max-width:1200px;margin:0 auto;padding:20px}.card{background:white;border-radius:8px;box-shadow:0 2px 4px #0000001a;padding:20px;margin:20px 0}.btn{background-color:#007bff;color:#fff;border:none;padding:10px 20px;border-radius:4px;cursor:pointer;margin:5px;font-size:16px}.btn:hover{background-color:#0056b3}.btn-secondary{background-color:#6c757d}.btn-secondary:hover{background-color:#545b62}.form-group{margin-bottom:15px}.form-control{width:100%;padding:10px;border:1px solid #ddd;border-radius:4px;font-size:16px}.text-center{text-align:center}.mt-4{margin-top:20px}.mb-4{margin-bottom:20px}