body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:#0f172a;color:#e2e8f0}.container{max-width:800px;margin:0 auto;padding:2rem}.card{background:#1e293b;border-radius:8px;padding:1.5rem;margin-bottom:1rem;border:1px solid #334155}h1,h2{color:#fff}.btn{background:#3b82f6;color:#fff;border:none;padding:.5rem 1rem;border-radius:4px;cursor:pointer}.btn:hover{background:#2563eb}.input{background:#0f172a;border:1px solid #334155;color:#fff;padding:.5rem;border-radius:4px;width:100%;margin-bottom:1rem}