:root{font-family:system-ui,sans-serif;color:#18212f;background:#f2f5f9}body{margin:0;min-height:100vh;display:grid;place-items:center}.card{width:min(680px,calc(100% - 40px));padding:36px;border-radius:22px;background:white;box-shadow:0 20px 70px #17203316}h1{font-size:clamp(2rem,5vw,3.4rem);margin:.3em 0}.eyebrow{color:#1769aa;font-weight:700;letter-spacing:.12em;font-size:.78rem}button{border:0;border-radius:12px;background:#1769aa;color:white;padding:12px 18px;font-size:1rem;cursor:pointer}pre{white-space:pre-wrap;background:#f4f7fa;border-radius:10px;padding:12px;min-height:24px}