*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;display:flex;align-items:center;justify-content:center}.container{background:#fff;padding:2rem 3rem;border-radius:12px;box-shadow:0 10px 40px #0003;text-align:center;max-width:500px;width:90%}h1{color:#333;margin-bottom:.5rem}p{color:#666;margin-bottom:1.5rem}button{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:12px 32px;font-size:1rem;border-radius:6px;cursor:pointer;transition:transform .2s,box-shadow .2s}button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 5px 20px #667eea66}button:disabled{opacity:.7;cursor:not-allowed}.response{margin-top:1.5rem;text-align:left;background:#f8f9fa;padding:1rem;border-radius:8px;border:1px solid #e9ecef}.response h2{font-size:1rem;color:#495057;margin-bottom:.5rem}.response pre{background:#282c34;color:#abb2bf;padding:1rem;border-radius:6px;overflow-x:auto;font-size:.875rem}