:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.4;font-weight:400;color:#0f172a;background-color:#f1f5f9;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;min-height:100vh}a{color:inherit}button,input{font:inherit}.app{min-height:100vh;display:grid;grid-template-rows:auto 1fr auto}.appHeader{padding:18px 20px;background:linear-gradient(135deg,#0b1220,#111c33);color:#e2e8f0;border-bottom:1px solid rgba(148,163,184,.2)}.brand{font-weight:800;letter-spacing:.2px}.brandSub{opacity:.85;font-size:13px}.appMain{padding:28px 16px;display:flex;justify-content:center}.card{width:min(680px,100%);background:#fff;border-radius:14px;border:1px solid rgba(15,23,42,.08);box-shadow:0 12px 30px #02061714;padding:22px}.title{margin:0 0 6px;font-size:20px}.subtitle{margin:0 0 18px;color:#475569;font-size:14px}.row{display:flex;gap:10px;align-items:center}.stack{display:grid;gap:12px}.btn{border:1px solid rgba(15,23,42,.12);background:#0f172a;color:#f8fafc;padding:10px 14px;border-radius:10px;cursor:pointer;font-weight:650}.btn:hover{filter:brightness(1.05)}.btn:disabled{opacity:.5;cursor:not-allowed}.btnSecondary{background:#fff;color:#0f172a}.input{width:100%;padding:10px 12px;border-radius:10px;border:1px solid rgba(15,23,42,.15);outline:none}.input:focus{border-color:#2563eba6;box-shadow:0 0 0 4px #2563eb1f}.help{color:#64748b;font-size:13px}.error{border:1px solid rgba(239,68,68,.4);background:#ef444414;color:#7f1d1d;padding:10px 12px;border-radius:10px}.success{border:1px solid rgba(34,197,94,.4);background:#22c55e14;color:#14532d;padding:10px 12px;border-radius:10px}.appFooter{padding:14px 20px;color:#64748b;font-size:12px;text-align:center}