:root{--bg:#1f1e1d;--sidebar:#262624;--panel:#30302e;--panel2:#3a3a37;--border:#3d3d39;--fg:#ecebe7;--muted:#9b9a94;--accent:#c96442;--accent2:#d97757;--radius:10px}*{box-sizing:border-box}body,html{margin:0;padding:0;height:100%}body{background:var(--bg);color:var(--fg);font:15px/1.55 ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;-webkit-font-smoothing:antialiased}button{cursor:pointer}button,textarea{font:inherit}.app{display:grid;grid-template-columns:260px 1fr;height:100vh}.side{background:var(--sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:12px;gap:4px;overflow:hidden}.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:18px;padding:8px 8px 12px}.brand .star{color:var(--accent2)}.newchat{display:flex;align-items:center;gap:10px;background:transparent;border:0;color:var(--fg);padding:10px;border-radius:8px;width:100%;text-align:left;font-weight:600}.newchat:hover{background:var(--panel)}.navitem{display:flex;align-items:center;gap:10px;color:var(--muted);padding:8px 10px;border-radius:8px}.navitem:hover{background:var(--panel);color:var(--fg)}.recents{margin-top:14px;font-size:12px;color:var(--muted);padding:0 10px 6px;text-transform:none}.sessions{flex:1 1;overflow:auto;display:flex;flex-direction:column;gap:1px}.sess{display:block;width:100%;text-align:left;background:transparent;border:0;color:var(--muted);padding:8px 10px;border-radius:8px;font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sess.on,.sess:hover{background:var(--panel);color:var(--fg)}.plan{display:flex;align-items:center;gap:10px;border-top:1px solid var(--border);padding:12px 8px 4px;margin-top:6px;color:var(--muted)}.avatar,.plan{font-size:13px}.avatar{width:28px;height:28px;border-radius:50%;background:var(--accent);color:#fff;display:grid;place-items:center;font-weight:700}.main{display:flex;flex-direction:column;height:100vh;min-width:0}.empty{flex:1 1;flex-direction:column;justify-content:center;padding:24px;gap:26px}.empty,.greet{display:flex;align-items:center}.greet{gap:14px;font-size:34px;font-weight:500;letter-spacing:-.01em}.greet .star{color:var(--accent2);font-size:30px}.chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;max-width:680px}.chip{display:flex;align-items:center;gap:8px;background:var(--panel);border:1px solid var(--border);color:var(--fg);padding:8px 14px;border-radius:999px;font-size:13.5px}.chip:hover{background:var(--panel2)}.composer-wrap{width:100%;max-width:720px}.composer{background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:14px 14px 10px}.composer textarea{width:100%;background:transparent;border:0;color:var(--fg);resize:none;outline:none;max-height:200px;font-size:15px}.composer textarea::placeholder{color:var(--muted)}.crow{justify-content:space-between;margin-top:8px}.crow,.model{display:flex;align-items:center}.model{gap:8px;color:var(--muted);font-size:13px;background:transparent;border:1px solid var(--border);border-radius:8px;padding:5px 10px}.send{background:var(--accent);border:0;color:#fff;width:34px;height:34px;border-radius:8px;display:grid;place-items:center;font-size:16px}.send:hover{background:var(--accent2)}.send:disabled{opacity:.5;cursor:default}.thread{flex:1 1;overflow:auto;padding:28px 0}.turn{max-width:740px;margin:0 auto;padding:8px 20px}.role{font-size:12px;color:var(--muted);margin-bottom:4px;font-weight:600}.bubble{white-space:pre-wrap;line-height:1.6}.turn.user .bubble{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:12px 14px}.foot{max-width:740px;margin:0 auto;width:100%;padding:0 20px 18px}.thinking{color:var(--muted);font-style:italic}@media (max-width:760px){.app{grid-template-columns:1fr}.side{display:none}}