*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:#f8fafc;color:#334155}.loading-spinner{border:2px solid #f3f4f6;border-top:2px solid #3b82f6;border-radius:50%;width:20px;height:20px;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.btn{padding:12px 24px;border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s}.btn-primary{background:#3b82f6;color:#fff}.btn-primary:hover{background:#2563eb}.btn-primary:disabled{background:#9ca3af;cursor:not-allowed}.btn-secondary{background:#6b7280;color:#fff}.btn-secondary:hover{background:#4b5563}.card{background:#fff;border-radius:12px;box-shadow:0 1px 3px #0000001a;padding:24px}.input{width:100%;padding:12px 16px;border:1px solid #d1d5db;border-radius:8px;font-size:16px}.input:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 3px #3b82f61a}