*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:#f5f5f5;color:#333}.container{max-width:1200px;margin:0 auto;padding:0 20px}.btn{padding:10px 20px;border:none;border-radius:4px;cursor:pointer;font-size:14px;transition:all .3s ease}.btn-primary{background-color:#007bff;color:#fff}.btn-primary:hover{background-color:#0056b3}.btn-secondary{background-color:#6c757d;color:#fff}.btn-secondary:hover{background-color:#545b62}.btn-success{background-color:#28a745;color:#fff}.btn-success:hover{background-color:#218838}.btn-danger{background-color:#dc3545;color:#fff}.btn-danger:hover{background-color:#c82333}.card{background:white;border-radius:8px;box-shadow:0 2px 4px #0000001a;padding:20px;margin-bottom:20px}.form-group{margin-bottom:15px}.form-group label{display:block;margin-bottom:5px;font-weight:500}.form-control{width:100%;padding:10px;border:1px solid #ddd;border-radius:4px;font-size:14px}.form-control:focus{outline:none;border-color:#007bff}.alert{padding:12px 20px;border-radius:4px;margin-bottom:20px}.alert-success{background-color:#d4edda;color:#155724;border:1px solid #c3e6cb}.alert-error{background-color:#f8d7da;color:#721c24;border:1px solid #f5c6cb}.alert-info{background-color:#d1ecf1;color:#0c5460;border:1px solid #bee5eb}.spinner{border:3px solid #f3f3f3;border-top:3px solid #007bff;border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite;margin:20px auto}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}