body{font-family:system-ui; color:#e5e7eb; background:#0f172a;} .container{max-width:960px;margin:0 auto;padding:2rem;} .card{background:#111827;border-radius:16px;padding:1rem;} .btn{padding:.6rem 1rem;border-radius:10px;background:#374151;color:#fff;border:0;cursor:pointer;} .input{padding:.5rem;border-radius:8px;width:100%;}