:root{--bg:#f7f7f8;--surface:#fff;--border:#e7e7ea;--text:#0f1115;--muted:#5f6368;--primary:#2563eb;--primary-ink:#fff;--user:#0ea5e9;--assistant:#e5e7eb;--code-bg:#f6f8fa;--code-border:#d1d9e0;--code-text:#24292f;--radius:14px;--shadow:0 1px 2px #0f11150f, 0 8px 24px #0f11150f}*{box-sizing:border-box}html,body,#root{height:100%}body{background:radial-gradient(1200px 800px at 80% -10%, #eef2ff 0%, #eef2ff00 60%), var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;margin:0;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,Apple Color Emoji,Segoe UI Emoji}.app{grid-template-rows:auto 1fr;gap:16px;max-width:880px;height:100%;margin:0 auto;padding:24px 16px 16px;display:grid;overflow:hidden}.header,.header-controls{flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;display:flex}.brand{background:var(--surface);border:1px solid 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#2563eb1f}.send{appearance:none;color:#fff;cursor:pointer;touch-action:manipulation;background:linear-gradient(#3b82f6,#2563eb);border:1px solid #1d4ed8;border-radius:999px;min-height:44px;padding:12px 18px;font-size:14px;font-weight:600;transition:transform 80ms,box-shadow .16s,opacity .16s;box-shadow:0 6px 16px #2563eb40}.send:hover:not(:disabled){transform:translateY(-1px)}.send:active:not(:disabled){transform:translateY(0)}.send:disabled{opacity:.6;cursor:not-allowed;box-shadow:none}.spinner{border:2px solid #ffffff73;border-top-color:#fff;border-radius:50%;width:16px;height:16px;animation:.8s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}:-webkit-any(input:-webkit-autofill,textarea:-webkit-autofill){-webkit-text-fill-color:var(--text)!important;-webkit-box-shadow:inset 0 0 0 30px #fff!important}:is(input:autofill,textarea:autofill){-webkit-text-fill-color:var(--text)!important;-webkit-box-shadow:inset 0 0 0 30px #fff!important}@media (width<=640px){.app{height:100vh;min-height:100vh;height:-webkit-fill-available;min-height:-webkit-fill-available;padding:16px 8px}.messages{min-height:0;padding:12px}.chat{height:100%;min-height:0;margin-bottom:0}.composer{border-radius:0;flex-shrink:0;gap:8px;margin:0;padding:12px;position:sticky;bottom:0;left:auto;right:auto}.input{border-radius:8px;font-size:16px}.send{border-radius:8px;padding:10px 16px}.app{height:100dvh}.chat{height:100%;overflow:hidden}.messages{overscroll-behavior:contain;overflow-y:auto}}@supports (-webkit-touch-callout:none){@media (width<=640px){.app{height:100vh;height:-webkit-fill-available}.composer{padding-bottom:calc(12px + env(safe-area-inset-bottom))}.input{font-size:16px;transform:translateZ(0)}}}@media screen and (-webkit-device-pixel-ratio>=0){@media 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