*{margin:0;padding:0;box-sizing:border-box}body{font-family:sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;display:flex;align-items:center;justify-content:center}.app{max-width:700px;padding:40px;text-align:center}header h1{color:#fff;font-size:32px;margin-bottom:8px}header p{color:rgba(255,255,255,0.7)}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:40px}.card{background:rgba(255,255,255,0.12);backdrop-filter:blur(10px);border-radius:12px;padding:24px;border:1px solid rgba(255,255,255,0.15)}.card h3{color:#fff;font-size:16px;margin-bottom:8px}.card p{color:rgba(255,255,255,0.6);font-size:13px}