*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:linear-gradient(135deg,#f5f7fa 0%,#c3cfe2 100%);min-height:100vh}.container{max-width:1200px;margin:0 auto;padding:2rem}.text-center{text-align:center}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mt-4{margin-top:2rem}.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}.mb-4{margin-bottom:2rem}.p-1{padding:.5rem}.p-2{padding:1rem}.p-3{padding:1.5rem}.p-4{padding:2rem}.spinner{display:inline-block;width:40px;height:40px;border:4px solid rgba(0,0,0,.1);border-radius:50%;border-top-color:#667eea;animation:spin 1s ease-in-out infinite}@keyframes spin{to{transform:rotate(360deg)}}.btn{padding:.75rem 2rem;border:none;border-radius:8px;font-size:1rem;font-weight:500;cursor:pointer;transition:all .2s;text-decoration:none;display:inline-block}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 15px #667eea66}.btn-success{background:#28a745;color:#fff}.btn-success:hover:not(:disabled){background:#218838}.btn-danger{background:#dc3545;color:#fff}.btn-danger:hover:not(:disabled){background:#c82333}.card{background:white;border-radius:12px;padding:1.5rem;box-shadow:0 4px 20px #00000014;transition:transform .2s}.card:hover{transform:translateY(-2px);box-shadow:0 6px 25px #0000001f}.alert{padding:1rem;border-radius:8px;margin:1rem 0}.alert-info{background:#d1ecf1;color:#0c5460;border:1px solid #bee5eb}.alert-success{background:#d4edda;color:#155724;border:1px solid #c3e6cb}.alert-danger{background:#f8d7da;color:#721c24;border:1px solid #f5c6cb}.alert-warning{background:#fff3cd;color:#856404;border:1px solid #ffeaa7}.progress-bar{height:4px;background:#e0e0e0;border-radius:2px;overflow:hidden;margin:1rem 0}.progress-fill{height:100%;background:linear-gradient(90deg,#667eea,#764ba2);transition:width .3s}.file-upload{border:2px dashed #e0e0e0;border-radius:8px;padding:2rem;text-align:center;cursor:pointer;transition:all .3s;background:#fafafa}.file-upload:hover{border-color:#667eea;background:#f5f3ff}.file-upload.dragging{border-color:#667eea;background:#f5f3ff;transform:scale(1.02)}