/* Reset simples */
    :root{--indigo:#4f46e5;--muted:#6b7280;--bg:#f8fafc}
    *{box-sizing:border-box}
    body{font-family:Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial; margin:0; color:#0f172a; background:var(--bg)}
    .container{max-width:1100px;margin:0 auto;padding:20px}
    header{display:flex;align-items:center;justify-content:space-between;padding:16px 0}
    .brand{display:flex;align-items:center;gap:12px}
    .logo{width:48px;height:48px;background:var(--indigo);color:white;border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:700}
    nav a{margin-left:16px;text-decoration:none;color:var(--muted);font-weight:600}
    .cta{background:var(--indigo);color:#fff;padding:10px 16px;border-radius:8px;text-decoration:none}

    .hero{display:grid;grid-template-columns:1fr;gap:24px;align-items:center;padding:40px 0}
    .hero h1{font-size:32px;margin:0 0 12px;line-height:1.05}
    .hero p{margin:0;color:var(--muted)}

    .card{background:white;padding:18px;border-radius:12px;box-shadow:0 6px 18px rgba(15,23,42,0.06)}
    .features{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-top:20px}

    .demo{margin-top:18px}
    input[type="text"], textarea{width:100%;padding:12px;border:1px solid #e6eef8;border-radius:8px;font-size:14px}
    button{background:var(--indigo);color:#fff;padding:10px 14px;border-radius:8px;border:0;cursor:pointer}

    footer{margin-top:48px;padding:28px 0;color:var(--muted);font-size:14px}

    /* responsive */
    @media(min-width:900px){
      .hero{grid-template-columns:1fr 420px}
      .hero h1{font-size:40px}
    }

    .badge{display:inline-block;padding:6px 10px;border-radius:999px;background:#eef2ff;color:var(--indigo);font-weight:700;font-size:13px}
    .pill{font-size:13px;color:var(--muted);background:#fff;padding:6px 10px;border-radius:8px;border:1px solid #eef2ff}

    .result-ok{color:green;font-weight:700}
    .result-bad{color:#c52929;font-weight:700}