*{box-sizing:border-box}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,'Helvetica Neue',Arial,sans-serif;margin:0;color:#0f172a;background:#f8fafc}header,footer{padding:24px 20px;background:#0f172a;color:#fff}header h1{margin:0 0 8px}nav a{color:#93c5fd;text-decoration:none;margin-right:12px}main{padding:24px 20px;max-width:960px;margin:0 auto}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}.card{background:#fff;border-radius:12px;padding:16px;box-shadow:0 2px 8px rgba(0,0,0,.08)}.price{font-weight:bold}.btn{display:inline-block;background:#2563eb;color:#fff;padding:10px 16px;border-radius:8px;text-decoration:none}.cta{text-align:center}