:root{--hnu-black:#000;--hnu-yellow:#ffed00;--hnu-blue:#0256b1;--text:#595959;--text-h:#000;--bg:#f2f2f2;--surface:#fff;--border:#dbdbdb;--code-bg:#f2f2f2;--accent:var(--hnu-yellow);--accent-ink:var(--hnu-black);--accent-hover:var(--hnu-black);--accent-bg:#0000000d;--accent-border:#0003;--danger:#c1003c;--danger-bg:#c1003c14;--success:#1f8f4e;--shadow:#00000029 1px 4px 7px 0;--shadow-sm:#0000001a 0 1px 2px;--sans:"Inter", Helvetica, Arial, sans-serif;--heading:"Inter", Helvetica, Arial, sans-serif;--mono:ui-monospace, Consolas, monospace;font:16px/150% var(--sans);--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0}#root{flex-direction:column;min-height:100svh;display:flex}h1,h2,h3{font-family:var(--heading);color:var(--text-h);margin:0;font-weight:700}p{margin:0}button{font-family:inherit}code{font-family:var(--mono);background:var(--code-bg);color:var(--text-h);padding:2px 6px;font-size:13px}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-thumb{background:var(--border)}::-webkit-scrollbar-track{background:0 0}.chat-page{flex:1;justify-content:center;width:100%;padding:24px;display:flex}.chat-card{background:var(--surface);border:1px solid var(--border);flex-direction:column;width:100%;max-width:760px;height:calc(100svh - 140px);display:flex;overflow:hidden}.chat-header{border-bottom:4px solid var(--hnu-yellow);background:var(--hnu-black);padding:18px 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var(--hnu-black);font:inherit;color:var(--text-h);background:var(--bg);flex:1;max-height:140px;padding:9px 13px;font-size:14.5px;line-height:1.4;transition:border-color .1s}.chat-input-bar textarea:focus{outline:2px solid var(--hnu-yellow);outline-offset:1px;border-color:var(--hnu-black)}.send-btn{background:var(--hnu-yellow);width:42px;height:42px;color:var(--hnu-black);cursor:pointer;border:none;flex-shrink:0;justify-content:center;align-items:center;transition:background .1s,color .1s;display:flex}.send-btn:hover:not(:disabled){background:var(--hnu-black);color:var(--hnu-yellow)}.send-btn:disabled{opacity:.35;cursor:not-allowed}.send-btn.loading:disabled{opacity:1;cursor:default}@keyframes spin{to{transform:rotate(360deg)}}.response-time{color:#777;font-size:11px}.copy-chat-btn{color:var(--text-h);border:2px solid var(--hnu-black);text-transform:uppercase;letter-spacing:.2px;cursor:pointer;background:#fff;align-items:center;gap:7px;padding:7px 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