:root{--bg: #f8f9fa;--panel: #ffffff;--panel-2: #f1f3f4;--text: #202124;--muted: #5f6368;--line: #dadce0;--accent: #1a73e8;--accent-2: #1765cc;--user: #e8f0fe;--user-line: #d2e3fc;--radius: 12px;--sidebar-w: 300px;--shadow: 0 1px 2px rgba(60, 64, 67, .12);--shadow-lg: 0 4px 16px rgba(60, 64, 67, .14)}[data-theme=light]{--bg: #f8f9fa;--panel: #ffffff;--panel-2: #f1f3f4;--text: #202124;--muted: #5f6368;--line: #dadce0;--user: #e8f0fe;--shadow: 0 1px 2px rgba(60, 64, 67, .12)}*{box-sizing:border-box}html,body{height:100%}body{margin:0;font-family:Google Sans,Inter,Roboto,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;background:var(--bg);color:var(--text);overflow:hidden;-webkit-font-smoothing:antialiased;font-size:14px}#app{display:flex;height:100vh}#sidebar{width:var(--sidebar-w);background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;padding:18px 16px 16px;gap:14px;transition:margin-left .25s ease,transform .25s ease}body.side-collapsed #sidebar{margin-left:calc(var(--sidebar-w) * -1)}.new-chat{width:100%;border:1px solid var(--accent);background:var(--accent);color:#fff;border-radius:10px;padding:11px 12px;font-size:13.5px;font-weight:600;cursor:pointer;text-align:left}.new-chat:hover{background:var(--accent-2)}.plus{display:inline-flex;width:20px;height:20px;align-items:center;justify-content:center;background:#ffffff38;color:#fff;border-radius:6px;margin-right:8px;font-weight:700}#collapseBtn,#menuBtn{display:none}.icon-btn{border:1px solid var(--line);background:var(--panel);color:var(--muted);border-radius:10px;width:36px;height:36px;cursor:pointer}.icon-btn:hover{color:var(--text);background:var(--panel-2)}.search-wrap input{width:100%;padding:10px 12px;border-radius:10px;border:1px solid var(--line);background:var(--panel);color:var(--text);outline:none;font-size:13px;font-family:inherit}.search-wrap input::placeholder{color:#80868b}.search-wrap input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #1a73e81f}.side-label{font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);padding:4px 6px 0}#chatList{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:2px}.chat-item{display:flex;align-items:center;gap:8px;padding:9px 10px;border-radius:8px;cursor:pointer;border:1px solid transparent}.chat-item:hover{background:var(--panel-2)}.chat-item.active{background:#e8f0fe;border-color:var(--user-line)}.chat-item .t{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:13px;font-weight:500;color:#3c4043}.chat-item.active .t{color:#1a73e8;font-weight:600}.chat-item .del{border:none;background:transparent;color:var(--muted);cursor:pointer;border-radius:6px;padding:2px 6px;font-size:12px;opacity:0}.chat-item:hover .del{opacity:1}.chat-item .del:hover{color:#b3261e;background:#fce8e6}.side-foot{display:flex;flex-direction:column;gap:8px;border-top:1px solid var(--line);padding-top:12px}.storage-note{font-size:11.5px;color:var(--muted);line-height:1.5;padding:0 2px}.ghost-btn{width:100%;background:var(--panel);border:1px solid var(--line);color:var(--muted);border-radius:8px;padding:9px;cursor:pointer;font-size:12.5px;font-weight:600;font-family:inherit}.ghost-btn:hover{color:var(--text);background:var(--panel-2)}.ghost-btn.danger:hover{color:#b3261e;border-color:#f2b8b5;background:#fef7f6}#main{flex:1;display:flex;flex-direction:column;min-width:0;position:relative}#topbar{display:flex;align-items:center;gap:12px;padding:0 24px;min-height:64px;border-bottom:1px solid var(--line);background:var(--panel)}.title-block{flex:1;min-width:0}#chatTitle{font-weight:650;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:-.01em}.top-model{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:1px}#messages{flex:1;overflow-y:auto;padding:28px 24px 12px;display:flex;flex-direction:column;gap:12px;max-width:880px;width:100%;margin:0 auto;scroll-behavior:smooth}.msg{max-width:80%;padding:13px 15px;border-radius:var(--radius);line-height:1.65;font-size:14px;white-space:pre-wrap;word-wrap:break-word;border:1px solid var(--line);background:var(--panel)}.msg.user{align-self:flex-end;background:var(--user);border-color:var(--user-line);border-bottom-right-radius:4px}.msg.ai{align-self:flex-start;border-bottom-left-radius:4px;box-shadow:var(--shadow)}.msg.typing{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:13px;font-weight:500}.msg .model-tag{display:flex;align-items:center;gap:7px;font-size:10.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}.dots{display:inline-flex;gap:4px}.typing i{width:5px;height:5px;background:#9aa0a6;border-radius:50%;display:inline-block;animation:blink 1.2s infinite}.typing i:nth-child(2){animation-delay:.2s}.typing i:nth-child(3){animation-delay:.4s}#empty{display:flex;justify-content:center;padding:0 24px;overflow-y:auto}#empty.hide{display:none}.empty-card{text-align:center;padding:48px 8px 12px;max-width:720px;width:100%}.empty-card h1{font-size:clamp(26px,3.4vw,34px);margin:0 0 10px;letter-spacing:-.025em;font-weight:700;color:#202124}.lede{color:var(--muted);margin:0 auto 26px;font-size:14.5px;line-height:1.6;max-width:560px}.suggestions{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.suggestions button{border:1px solid var(--line);background:var(--panel);color:var(--text);padding:9px 16px;border-radius:999px;cursor:pointer;font-size:13px;font-weight:550;font-family:inherit}.suggestions button:hover{border-color:var(--accent);background:#f6fafe}#composer-wrap{padding:14px 24px 18px;max-width:880px;width:100%;margin:0 auto}#composer{display:flex;flex-direction:column;gap:10px;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:12px 12px 12px 14px;box-shadow:var(--shadow-lg)}#composer:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px #1a73e81f,var(--shadow-lg)}.composer-top{display:flex;align-items:center;gap:10px}.composer-bottom{display:flex;align-items:flex-end;gap:10px}#input{flex:1;resize:none;border:none;outline:none;background:transparent;color:var(--text);font-size:14px;line-height:1.6;max-height:160px;padding:6px 4px;font-family:inherit}#input::placeholder{color:#80868b}#sendBtn{width:38px;height:38px;border-radius:10px;border:none;cursor:pointer;font-size:16px;font-weight:700;background:var(--accent);color:#fff;flex-shrink:0}#sendBtn:disabled{opacity:.4;cursor:not-allowed}#sendBtn:not(:disabled):hover{background:var(--accent-2)}.hint{text-align:center;color:var(--muted);font-size:11.5px;margin-top:9px}.model-picker{position:relative}#modelBtn{display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:8px;padding:7px 10px;cursor:pointer;font-size:12.5px;font-family:inherit;max-width:300px}#modelBtn:hover{border-color:var(--accent);background:#f6fafe}#modelName{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:650}#modelBtn .chev{color:var(--muted);font-size:11px}#modelMenu{position:absolute;bottom:calc(100% + 10px);left:0;width:min(440px,84vw);max-height:400px;overflow-y:auto;background:var(--panel);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-lg);padding:6px;z-index:20}#modelMenu[hidden]{display:none}.model-item{width:100%;text-align:left;background:transparent;border:1px solid transparent;border-radius:10px;padding:11px 12px;cursor:pointer;color:var(--text);display:flex;flex-direction:column;gap:4px;font-family:inherit}.model-item:hover{background:var(--panel-2)}.model-item.active{border-color:var(--accent);background:#f6fafe}.model-item .row1{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:700}.model-item .prov{font-size:10px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:2px 8px;background:var(--panel)}.model-item .row2{font-size:11.5px;color:var(--muted);font-weight:600}.model-item .row3{font-size:12px;color:var(--muted);line-height:1.5}.model-logo{width:20px;height:20px;border-radius:6px;object-fit:contain;background:#fff;border:1px solid var(--line);flex-shrink:0}.model-logo.sm{width:15px;height:15px;border-radius:4px}#modelLogo{width:18px;height:18px;border-radius:5px;object-fit:contain;background:#fff;border:1px solid var(--line);flex-shrink:0}#scrim{position:fixed;top:0;right:0;bottom:0;left:0;background:#20212473;z-index:5}@keyframes blink{0%,80%,to{opacity:.3}40%{opacity:1}}@media(max-width:860px){#sidebar{position:fixed;z-index:10;height:100vh;transform:translate(-105%)}body.side-open #sidebar{transform:none}body.side-collapsed #sidebar{margin-left:0}#menuBtn{display:block}.price-hint{display:none}.suggestions{grid-template-columns:1fr}.msg{max-width:94%}#topbar,#composer-wrap,#messages{padding-left:16px;padding-right:16px}}@media(min-width:861px){#menuBtn{display:none}#scrim{display:none!important}}