:root {color-scheme:light;--base:#fff;--sidebar:#f7f7f8;--panel:#fff;--hover:#eceff3;--text:#162339;--muted:#64748b;--border:#e2e7ed;--accent:#1c64d8;--accent-text:#fff;--bubble:#f2f5fa;--shadow:0 8px 30px rgba(10,25,55,.06)}
:root[data-theme=dark]{color-scheme:dark;--base:#121925;--sidebar:#0b1422;--panel:#192334;--hover:#26354b;--text:#edf4ff;--muted:#afbed2;--border:#30415a;--accent:#4b90ff;--accent-text:#08182f;--bubble:#202d3f;--shadow:0 8px 30px rgba(0,0,0,.18)}
*{box-sizing:border-box}html,body{height:100%;margin:0}body{background:var(--base);color:var(--text);font:15px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Arial,sans-serif}button,textarea,input{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}.app{display:flex;width:100%;height:100dvh;min-height:460px}.sidebar{width:268px;flex:0 0 268px;background:var(--sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:18px 13px;gap:12px;z-index:30}.side-top{display:flex;align-items:center;justify-content:space-between;padding:3px 8px 9px}.brand{font-size:19px;font-weight:800;letter-spacing:-.6px}.brand-glyph{color:var(--accent)}.new-chat{border:1px solid var(--border);background:var(--panel);color:var(--text);padding:10px 12px;border-radius:11px;font-weight:700;text-align:left}.new-chat:hover,.history-item:hover,.icon-btn:hover,.suggestion:hover{background:var(--hover)}.search-label{font-size:11px;font-weight:700;color:var(--muted);margin-bottom:-8px}.history-search{width:100%;border:1px solid var(--border);background:var(--base);padding:10px 11px;color:var(--text);border-radius:10px;outline-offset:2px}.history-heading{font-size:12px;font-weight:750;color:var(--muted);padding:8px 8px 0;display:flex;justify-content:space-between}.chat-list{display:flex;flex-direction:column;overflow-y:auto;flex:1;min-height:60px;gap:3px}.history-item{display:flex;align-items:center;gap:3px;border-radius:9px}.history-item.active{background:var(--hover)}.history-open{flex:1;min-width:0;text-align:left;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:9px;background:none;border:none;color:var(--text)}.history-open span{white-space:nowrap}.history-rename,.history-delete{font-size:12px;border:0;color:var(--muted);background:none;min-width:27px;min-height:30px;border-radius:6px}.history-rename:hover,.history-delete:hover{background:var(--panel)}.side-bottom{font-size:11px;color:var(--muted);padding:12px 8px;border-top:1px solid var(--border);line-height:1.5}.side-bottom p{margin:8px 0 0}.model-info{color:var(--text)}.online-dot{display:inline-block;width:7px;height:7px;border-radius:100%;background:#38b981;margin-right:4px}.main-pane{flex:1;min-width:0;display:flex;flex-direction:column}.topbar{height:68px;flex:0 0 68px;background:var(--base);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 28px;position:sticky;top:0;z-index:15}.top-left,.top-right{display:flex;align-items:center;gap:20px}.top-brand{font-size:17px;font-weight:800;white-space:nowrap}.top-brand span{color:var(--accent)}.product-label{border-left:1px solid var(--border);padding-left:16px;color:var(--muted);font-weight:600;white-space:nowrap}.navlink{color:var(--muted);font-size:13px;font-weight:650}.image-link{background:#55d8e6;color:#082939!important;border:1px solid #2fb4c7;padding:8px 15px;border-radius:999px;font-size:13px;white-space:nowrap;font-weight:800;box-shadow:0 4px 15px #38b5c530}.image-link:hover{background:#93edf4}.icon-btn{color:var(--text);border:0;background:transparent;border-radius:8px;width:36px;height:36px;font-size:19px}.chat-main{overflow-y:auto;flex:1;min-height:0;scroll-behavior:smooth}.thread{max-width:830px;padding:36px 28px 24px;margin:0 auto}.welcome{max-width:660px;margin:clamp(46px,13vh,140px) auto 20px;padding:0 25px;text-align:center}.welcome-icon{height:52px;width:52px;margin:0 auto 15px;border-radius:16px;background:var(--bubble);font-size:30px;color:var(--accent)}.welcome h1{font-size:clamp(25px,3vw,34px);line-height:1.2;letter-spacing:-.85px}.welcome p{color:var(--muted)}.suggestions{display:flex;justify-content:center;flex-wrap:wrap;gap:9px;margin-top:24px}.suggestion{border:1px solid var(--border);background:var(--panel);color:var(--text);padding:9px 12px;border-radius:10px;font-size:13px}.msg{margin:8px 0 26px;display:flex;flex-direction:column;gap:8px;white-space:normal;word-break:break-word}.msg.user{align-items:flex-end}.bubble{max-width:min(100%,640px);border-radius:17px;padding:13px 17px;white-space:pre-wrap;overflow-wrap:anywhere}.user .bubble{background:var(--bubble)}.assistant-label{display:flex;gap:10px;align-items:center;color:var(--text);font-size:13px;font-weight:800}.assistant-mark{font-size:19px;color:var(--accent)}.assistant-content{white-space:pre-wrap;line-height:1.8;overflow-wrap:anywhere;padding:2px 0;min-height:26px}.msg-tools{display:flex;gap:8px}.msg-tools button{border:0;background:transparent;color:var(--muted);padding:4px 8px;border-radius:6px;font-size:12px}.msg-tools button:hover{background:var(--hover);color:var(--text)}.progress{border:1px solid var(--border);background:var(--panel);border-radius:12px;padding:12px 14px;margin:2px 0 14px;box-shadow:var(--shadow);font-size:13px}.progress-heading{display:flex;align-items:center;gap:9px;font-weight:750}.spinner{border:2px solid var(--border);border-top-color:var(--accent);width:13px;height:13px;border-radius:100%;animation:spin 1s linear infinite}.progress.done .spinner{animation:none;border-color:#2cb781;background:#2cb781}.progress.error .spinner{animation:none;border-color:#e65d60;background:#e65d60}@keyframes spin{to{transform:rotate(360deg)}}.progress-log{color:var(--muted);font-size:12px;margin:7px 0 0;display:flex;flex-direction:column;gap:3px}.source-list{display:flex;flex-wrap:wrap;gap:7px;margin:10px 0 0}.source-chip{display:inline-flex;gap:6px;max-width:100%;color:var(--accent);background:var(--bubble);border:1px solid var(--border);border-radius:999px;font-size:11px;padding:4px 9px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.composer-area{padding:12px 24px 10px;background:var(--base);border-top:1px solid var(--border)}.composer{max-width:830px;margin:auto;border:1px solid var(--border);border-radius:17px;background:var(--panel);padding:12px 15px;box-shadow:var(--shadow)}.composer textarea{width:100%;resize:none;border:0;outline:0;background:transparent;color:var(--text);display:block;min-height:46px;max-height:180px;overflow-y:auto;padding:5px 2px 11px}.composer-bottom,.composer-options,.composer-actions{display:flex;align-items:center;gap:11px;justify-content:space-between}.composer-options,.composer-actions{justify-content:initial}.search-toggle{font-size:12px;font-weight:700;color:var(--muted);display:inline-flex;align-items:center;gap:5px;cursor:pointer}.search-toggle input{accent-color:var(--accent)}.text-btn{border:none;background:none;color:var(--muted);font-size:12px}.text-btn:hover{text-decoration:underline}.composer-hint{font-size:11px;color:var(--muted)}.send-btn{border:0;background:var(--accent);color:var(--accent-text);border-radius:10px;padding:9px 12px;font-weight:800;white-space:nowrap}.send-btn:hover{filter:brightness(1.07)}.send-btn:disabled{opacity:.6;cursor:wait}.stop-btn{background:var(--bubble);border:1px solid var(--border);border-radius:10px;padding:7px 10px;color:var(--text);font-weight:750}.footer-note{max-width:830px;margin:8px auto 0;text-align:center;font-size:11px;color:var(--muted)}.banner{max-width:830px;margin:0 auto 8px;padding:8px 12px;border-radius:9px;background:var(--bubble);border:1px solid var(--border);font-size:13px}.mobile-only{display:none}.mobile-overlay{position:fixed;inset:0;background:#0008;z-index:20}.menu-button{display:none}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
@media(max-width:850px){.sidebar{position:fixed;left:0;top:0;bottom:0;transform:translateX(-110%);transition:transform .2s;box-shadow:var(--shadow)}.sidebar.open{transform:translateX(0)}.menu-button,.mobile-only{display:inline-block}.topbar{padding:0 16px;height:60px;flex-basis:60px}.top-left,.top-right{gap:9px}.product-label{display:none}.thread{padding:25px 16px}.composer-area{padding:9px 12px}.composer-hint{display:none}}
@media(max-width:530px){.navlink{display:none}.top-brand{font-size:15px}.image-link{padding:7px 10px;font-size:11px}.top-right{gap:5px}.welcome{margin-top:50px}.send-btn span{display:none}.composer-bottom{align-items:flex-end}.footer-note{font-size:10px}}