*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:#f3f4f6;color:#111827}.card{background:#fff;border-radius:8px;padding:1.25rem;box-shadow:0 1px 4px #00000014}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.5rem 1rem;border-radius:4px;border:none;font-size:.875rem;font-weight:600;cursor:pointer;transition:opacity .15s}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:#3b82f6;color:#fff}.btn-outline{background:#fff;color:#374151;border:1px solid #d1d5db}.btn-green{background:#22c55e;color:#fff}.btn-danger{background:#ef4444;color:#fff}.btn-sm{padding:.35rem .75rem;font-size:.8rem}.btn:hover:not(:disabled){opacity:.9}