:root{--canvas:#fff;--ink:#171717;--muted:#737373;--subtle:#a3a3a3;--line:#e5e5e5;--surface:#fff;--primary:#4f46e5;--primary-soft:#eef2ff;--danger:#dc2626;--wash:#f5f5f5;--radius:10px;--sidebar:260px;color:var(--ink);background:var(--canvas);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif}[data-theme=dark]{--canvas:#171717;--ink:#fafafa;--muted:#a3a3a3;--subtle:#737373;--line:#2a2a2a;--surface:#262626;--primary:#818cf8;--primary-soft:#1e1b4b;--wash:#262626}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}button,input,textarea,select{font:inherit;color:inherit}button{cursor:pointer}a{color:var(--primary)}.app{background:var(--canvas);height:100dvh;display:flex}.sidebar{width:var(--sidebar);border-right:1px solid var(--line);background:var(--canvas);flex-direction:column;flex-shrink:0;display:flex}.sidebar.collapsed{width:56px}.sidebar-head{align-items:center;gap:8px;padding:12px;display:flex}.sidebar-head h1{flex:1;margin:0;font-size:16px;font-weight:600}.icon-btn{border:1px solid var(--line);background:var(--surface);border-radius:var(--radius);width:36px;height:36px;color:var(--ink);place-items:center;display:grid}.icon-btn:hover{background:var(--wash)}.conv-list{flex:1;padding:8px;overflow:auto}.conv-item{text-align:left;border-radius:var(--radius);background:0 0;border:0;align-items:flex-start;gap:8px;width:100%;padding:10px 12px;display:flex}.conv-item.active,.conv-item:hover{background:var(--wash)}.conv-item .meta{flex:1;min-width:0}.conv-item .title{white-space:nowrap;text-overflow:ellipsis;font-size:14px;font-weight:500;overflow:hidden}.conv-item .preview{color:var(--muted);white-space:nowrap;text-overflow:ellipsis;font-size:12px;overflow:hidden}.ghost{color:var(--muted);background:0 0;border:0;padding:0}.ghost:hover{color:var(--danger)}.sidebar-foot{border-top:1px solid var(--line);flex-direction:column;gap:8px;padding:12px;display:flex}.sidebar-foot button{text-align:left;border-radius:var(--radius);background:0 0;border:0;padding:8px}.sidebar-foot button:hover{background:var(--wash)}.main{flex-direction:column;flex:1;min-width:0;display:flex}.topbar{border-bottom:1px solid var(--line);align-items:center;gap:12px;height:52px;padding:0 16px;display:flex}.topbar h2{text-overflow:ellipsis;white-space:nowrap;flex:1;margin:0;font-size:15px;font-weight:600;overflow:hidden}.model-select{border:1px solid var(--line);background:var(--surface);border-radius:var(--radius);max-width:200px;padding:6px 10px}.thread{flex:1;padding:24px 0;overflow:auto}.thread-inner{flex-direction:column;gap:16px;max-width:720px;margin:0 auto;padding:0 24px;display:flex}.msg.user{align-self:flex-end;max-width:80%}.bubble{background:var(--primary);color:#fff;border-radius:var(--radius);white-space:pre-wrap;padding:10px 14px;line-height:1.5}.msg.assistant{color:var(--ink);align-self:stretch;line-height:1.5}.thumbs{flex-wrap:wrap;gap:8px;margin-bottom:8px;display:flex}.thumbs img{object-fit:cover;border-radius:var(--radius);width:72px;height:72px}.retry{border:1px solid var(--line);background:var(--surface);border-radius:var(--radius);margin-top:8px;padding:6px 10px}.empty{text-align:center;color:var(--muted);padding:80px 16px}.empty h3{color:var(--ink);margin:0 0 8px}.starters{flex-direction:column;gap:8px;margin-top:24px;display:flex}.starters button{border:1px solid var(--line);background:var(--surface);border-radius:var(--radius);text-align:left;padding:12px 14px}.starters button:hover{border-color:var(--primary)}.composer{border-top:1px solid var(--line);padding:12px 24px 20px}.composer-inner{max-width:720px;margin:0 auto}.pending{gap:8px;margin-bottom:8px;display:flex}.pending .chip{position:relative}.pending img{object-fit:cover;border-radius:var(--radius);width:64px;height:64px}.pending .chip button{background:var(--surface);border:0;border-radius:99px;width:18px;height:18px;font-size:11px;position:absolute;top:2px;right:2px}.row{align-items:flex-end;gap:8px;display:flex}.row textarea{resize:none;border:1px solid var(--line);background:var(--surface);border-radius:16px;flex:1;min-height:44px;max-height:184px;padding:10px 14px}.send{background:var(--primary);color:#fff;border:0;border-radius:16px;width:44px;height:44px}.send:disabled{background:var(--line);color:var(--subtle)}.login{place-items:center;height:100%;min-height:100dvh;padding:24px;display:grid}.card{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);width:100%;max-width:400px;padding:32px}.card h1{margin:0 0 4px;font-size:28px}.card p{color:var(--muted);margin:0 0 24px}.card label{margin-bottom:6px;font-size:13px;font-weight:500;display:block}.card input{border:1px solid var(--line);border-radius:var(--radius);background:var(--canvas);width:100%;margin-bottom:16px;padding:10px 12px}.primary{background:var(--primary);color:#fff;border-radius:var(--radius);border:0;width:100%;padding:12px;font-weight:600}.primary:disabled{opacity:.6}.error{color:var(--danger);margin-bottom:12px;font-size:13px}.hint{color:var(--muted);font-size:13px}.md p{margin:0 0 8px}.md p:last-child{margin:0}.md code{background:var(--wash);border-radius:4px;padding:1px 4px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em}.md pre{background:var(--wash);border-radius:var(--radius);padding:12px;overflow:auto}.md ul,.md ol{margin:0 0 8px;padding-left:20px}.profile{max-width:560px;margin:0 auto;padding:32px 24px}.profile h2{margin:0 0 16px}.typing{gap:4px;padding:8px 0;display:flex}.typing span{background:var(--subtle);border-radius:99px;width:6px;height:6px;animation:1s infinite bounce}.typing span:nth-child(2){animation-delay:.15s}.typing span:nth-child(3){animation-delay:.3s}@keyframes bounce{0%,80%,to{opacity:.3}40%{opacity:1}}.text-btn,.link-btn{color:var(--primary);border-radius:var(--radius);background:0 0;border:0;padding:8px}.link-btn{margin-top:8px;padding:8px 0}.text-btn:hover,.link-btn:hover{text-decoration:underline}.menu-btn,.close-btn,.backdrop{display:none}@media (width<=767px){.sidebar{z-index:20;width:min(85vw, var(--sidebar));transition:transform .2s;position:fixed;inset:0 auto 0 0;transform:translate(-100%)}.sidebar.open{transform:none;box-shadow:0 0 24px #0000001f}.backdrop{z-index:10;opacity:0;pointer-events:none;background:#00000059;transition:opacity .2s;display:block;position:fixed;inset:0}.backdrop.open{opacity:1;pointer-events:auto}.menu-btn,.close-btn{display:grid}.collapse-btn{display:none}.icon-btn,.send{width:44px;height:44px}.conv-item{padding:12px}.ghost{min-width:44px;min-height:44px}.topbar{padding:0 8px}.model-select{max-width:40vw}.thread{padding:16px 0}.thread-inner{padding:0 16px}.msg.user{max-width:88%}.empty{padding:40px 0}.composer{padding:8px 12px calc(12px + env(safe-area-inset-bottom))}.row textarea,.card input{font-size:16px}.card{padding:24px}}