:root{--brand:#0f766e;--bg:#fafaf9;--card:#fff;--text:#1c1917;--muted:#78716c;--border:#e7e5e4}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}header{background:var(--brand);color:#fff;padding:12px 20px;display:flex;gap:16px;align-items:center;flex-wrap:wrap}header a{color:#fff;text-decoration:none;font-weight:600}main{max-width:960px;margin:0 auto;padding:20px}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px;margin-bottom:12px}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));grid-gap:12px;gap:12px}button{background:var(--brand);color:#fff;border:0;border-radius:8px;padding:8px 14px;cursor:pointer;font-weight:600}button.secondary{background:#e7e5e4;color:var(--text)}button:disabled{opacity:.5;cursor:default}input,select,textarea{border:1px solid var(--border);border-radius:8px;padding:8px;font:inherit}.muted{color:var(--muted);font-size:14px}.badge{display:inline-block;padding:2px 8px;border-radius:999px;background:#ccfbf1;color:#115e59;font-size:12px;font-weight:600}.error{color:#b91c1c}.demo{background:#fef3c7;color:#78350f;padding:6px 20px;font-size:13px}