:root{color-scheme:light;--bg:#f7f8f3;--panel:#fff;--panel2:#f0f3eb;--line:#dbe0d5;--muted:#667064;--text:#1c241b;--accent:#dfff3f;--accentText:#172000;--danger:#c93434;--sidebar:#eef1e9}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.45 Inter,Segoe UI,Arial,sans-serif}.hidden{display:none!important}button,input,textarea,select{font:inherit}.shell{height:100vh;display:grid;grid-template-columns:284px minmax(0,1fr)}.sidebar{background:var(--sidebar);border-right:1px solid var(--line);display:flex;flex-direction:column;padding:14px 12px;min-height:0}.brand{display:flex;align-items:center;gap:11px;padding:8px}.brand div:last-child{display:flex;flex-direction:column}.brand span{font-size:12px;color:var(--muted)}.brand-mark{width:54px;height:54px;border-radius:16px;background:var(--accent);color:var(--accentText);display:grid;place-items:center;font-weight:800;letter-spacing:-1px}.brand-mark.small{width:36px;height:36px;border-radius:11px;font-size:13px}.new-chat,.primary{border:0;border-radius:10px;background:var(--accent);color:var(--accentText);font-weight:700;padding:11px 14px;cursor:pointer}.new-chat{margin:14px 4px 10px;text-align:left}.search{margin:2px 4px 10px;display:flex;align-items:center;gap:7px;background:var(--panel);border:1px solid var(--line);border-radius:9px;padding:7px 10px;color:var(--muted)}.search input{min-width:0;width:100%;border:0;outline:0;background:transparent;color:var(--text)}.sessions{overflow:auto;display:flex;flex-direction:column;gap:3px}.session{border:0;background:transparent;color:var(--text);text-align:left;border-radius:9px;padding:10px;cursor:pointer}.session:hover,.session.active{background:#dfe5d8}.session strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:13px}.session span{display:flex;justify-content:space-between;color:var(--muted);font-size:11px;margin-top:4px}.sidebar footer{margin-top:auto;border-top:1px solid var(--line);padding:12px 6px 2px;display:flex;justify-content:space-between;align-items:center}.ghost,.icon-button{border:1px solid #cfd6c9;background:var(--panel);color:#394338;border-radius:9px;padding:7px 10px;cursor:pointer}.status{font-size:11px;color:#317a45}.chat{min-width:0;display:grid;grid-template-rows:auto 1fr auto auto auto;position:relative}.chat-head{height:70px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.72);display:flex;align-items:center;padding:0 22px;gap:12px}.chat-head h2{margin:0;font-size:15px}.chat-head p{margin:2px 0 0;color:var(--muted);font-size:12px}.head-actions{margin-left:auto;display:flex;gap:8px}.head-actions select{background:var(--panel);border:1px solid #cfd6c9;color:var(--text);border-radius:9px;padding:8px}.icon-button{display:none}.messages{overflow:auto;padding:34px max(22px,calc((100% - 850px)/2));scroll-behavior:smooth}.welcome{height:100%;min-height:280px;display:grid;place-content:center;text-align:center}.welcome .orb{margin:auto;width:54px;height:54px;border:1px solid #cbd2c5;background:var(--panel);border-radius:18px;display:grid;place-items:center;font-size:26px}.welcome h1{font-size:30px;margin:17px 0 6px}.welcome p{color:var(--muted);margin:0}.message{display:grid;grid-template-columns:36px 1fr;gap:12px;margin:0 0 28px}.avatar{width:32px;height:32px;border-radius:10px;background:#e1e6dc;display:grid;place-items:center;font-size:12px;font-weight:800}.message.user .avatar{background:var(--accent);color:var(--accentText)}.bubble{min-width:0}.bubble header{font-size:12px;color:var(--muted);margin:0 0 7px}.content{white-space:pre-wrap;overflow-wrap:anywhere;font-size:15px}.message.user .content{background:#eef3e7;border:1px solid #d8dfd1;border-radius:14px;padding:12px 14px;display:inline-block}.files{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}.file-pill,.upload-pill{padding:6px 9px;border:1px solid var(--line);background:var(--panel);border-radius:8px;font-size:12px}.pending{color:var(--muted);animation:pulse 1.2s infinite}@keyframes pulse{50%{opacity:.45}}.uploads{width:min(850px,calc(100% - 44px));margin:0 auto;display:flex;gap:7px;flex-wrap:wrap}.composer{width:min(850px,calc(100% - 44px));margin:10px auto 0;border:1px solid #cfd6c9;background:var(--panel);border-radius:17px;display:grid;grid-template-columns:auto 1fr auto;align-items:end;padding:10px;box-shadow:0 14px 40px rgba(34,45,28,.12)}.composer textarea{resize:none;max-height:180px;background:transparent;color:var(--text);border:0;outline:0;padding:8px;line-height:1.45}.attach{width:38px;height:38px;display:grid;place-items:center;border-radius:11px;cursor:pointer;font-size:24px;color:#667064}.attach:hover{background:#eef1e9}.attach input{display:none}.send{width:38px;height:38px;border:0;border-radius:11px;background:var(--accent);color:var(--accentText);font-weight:900;font-size:20px;cursor:pointer}.hint{text-align:center;color:#7a8378;font-size:11px;margin:7px 0 12px}.auth{min-height:100vh;display:grid;place-items:center;padding:20px;background:radial-gradient(circle at 50% 10%,#fff,#edf1e7 52%,#e7ece1)}.auth-card{width:min(390px,100%);background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:28px;box-shadow:0 24px 70px rgba(34,45,28,.16)}.auth-card .brand-mark{margin-bottom:22px}.auth-card h1{margin:0 0 4px}.auth-card p{color:var(--muted);margin:0 0 20px}.auth-card label{display:grid;gap:7px;margin:13px 0;color:#4b5549;font-size:13px}.auth-card input{background:#fbfcfa;border:1px solid #cfd6c9;color:var(--text);border-radius:9px;padding:11px}.auth-card .primary{width:100%;margin-top:8px}.auth-card .error{color:var(--danger);margin:12px 0 0;min-height:20px}.error{color:var(--danger)}@media(max-width:760px){.shell{grid-template-columns:1fr}.sidebar{position:fixed;z-index:5;width:284px;inset:0 auto 0 0;transform:translateX(-100%);transition:.2s}.sidebar.open{transform:none}.icon-button{display:block}.chat-head{padding:0 12px}.head-actions select{max-width:130px}.head-actions .ghost{display:none}.messages{padding:25px 16px}.composer,.uploads{width:calc(100% - 24px)}}