body { background-color: #000; color: #fff; font-family: sans-serif; display: flex; justify-content: center; align-items: center; height: 100vh; margin: 0; text-align: center; } .container { padding: 30px; border: 2px solid #444; border-radius: 20px; background: #111; max-shadow: 0 0 20px rgba(255,255,0,0.2); }