:root{color:#172033;background:#f5f7fb;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}body{margin:0;min-height:100vh;display:grid;place-items:center}.card{width:min(420px,calc(100vw - 48px));box-sizing:border-box;padding:36px;border:1px solid #d8e0ee;border-radius:16px;background:#fff;box-shadow:0 16px 50px #1720331f}h1{font-size:1.45rem;margin:0 0 12px}p{color:#58657a;line-height:1.6}button{width:100%;margin-top:20px;padding:12px 16px;border:0;border-radius:8px;background:#2458d3;color:#fff;font:inherit;font-weight:700;cursor:pointer}button:disabled{cursor:wait;opacity:.7}.error{color:#b42318}