body{margin:0;background:#fff;color:#171716;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}main{max-width:980px;margin:0 auto;padding:28px 18px}h1{font-size:34px}.card{border:1px solid #e7e4dc;border-radius:12px;background:#f8f8f6;padding:18px}button{min-height:52px;border:0;border-radius:12px;background:#f6c945;font-weight:800;padding:0 18px}pre{white-space:pre-wrap;overflow:auto}