:root,[data-theme=light]{color-scheme:light;--brand: #2563eb;--brand-hover: #1d4ed8;--brand-soft: rgba(37, 99, 235, .08);--brand-soft-strong: rgba(37, 99, 235, .14);--ring-brand: rgba(37, 99, 235, .2);--bg-app: #fcfcfc;--bg-surface: #ffffff;--bg-surface-2: #fafafa;--bg-sidebar: rgba(250, 250, 252, .9);--bg-hover: rgba(0, 0, 0, .045);--bg-active: rgba(0, 0, 0, .08);--bg-input: #ffffff;--bg-code: rgba(0, 0, 0, .04);--bg-user-msg: rgba(0, 0, 0, .05);--bg-selected: rgba(37, 99, 235, .07);--bg-elevated: rgba(255, 255, 255, .82);--bg-mask: rgba(245, 245, 247, .85);--text: #1d1d1f;--text-secondary: #6e6e73;--text-tertiary: #86868b;--active-text: #2563eb;--hairline: rgba(0, 0, 0, .07);--hairline-strong: rgba(0, 0, 0, .14);--border: rgba(0, 0, 0, .07);--border-strong: rgba(0, 0, 0, .14);--active-bar: #2563eb;--shadow-xs: 0 1px 2px rgba(0, 0, 0, .04);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .04), 0 4px 12px rgba(0, 0, 0, .05);--shadow-md: 0 2px 6px rgba(0, 0, 0, .04), 0 12px 28px rgba(0, 0, 0, .08);--shadow-lg: 0 4px 12px rgba(0, 0, 0, .06), 0 24px 60px rgba(0, 0, 0, .12);--shadow-pop: 0 8px 24px rgba(0, 0, 0, .1), 0 24px 64px rgba(0, 0, 0, .14);--shadow-soft: 0 1px 2px rgba(0, 0, 0, .04);--shadow-float: 0 4px 12px rgba(0, 0, 0, .06), 0 16px 40px rgba(0, 0, 0, .1);--shadow-glow: 0 0 0 1px rgba(255, 255, 255, .5) inset;--primary: #2563eb;--primary-hover: #1d4ed8;--primary-text: #ffffff;--accent: #2563eb;--accent-hover: #1d4ed8;--danger: #ff3b30;--danger-bg: rgba(255, 59, 48, .1);--radius-sm: 10px;--radius-md: 14px;--radius-lg: 20px;--radius-xl: 26px;--sidebar-w: 18.857rem;--content-w: 61.8%}[data-theme=dark]{color-scheme:dark;--brand: #4d8dff;--brand-hover: #7db0ff;--brand-soft: rgba(77, 141, 255, .12);--brand-soft-strong: rgba(77, 141, 255, .2);--ring-brand: rgba(77, 141, 255, .3);--bg-app: #000000;--bg-surface: #1d1d1f;--bg-surface-2: #161618;--bg-sidebar: rgba(24, 24, 26, .92);--bg-hover: rgba(255, 255, 255, .06);--bg-active: rgba(255, 255, 255, .1);--bg-input: #1c1c1e;--bg-code: rgba(255, 255, 255, .06);--bg-user-msg: rgba(255, 255, 255, .08);--bg-selected: rgba(77, 141, 255, .14);--bg-elevated: rgba(32, 32, 34, .85);--bg-mask: rgba(0, 0, 0, .8);--text: #f5f5f7;--text-secondary: #98989d;--text-tertiary: #6e6e73;--active-text: #7db0ff;--hairline: rgba(255, 255, 255, .09);--hairline-strong: rgba(255, 255, 255, .16);--border: rgba(255, 255, 255, .09);--border-strong: rgba(255, 255, 255, .16);--active-bar: #4d8dff;--shadow-xs: 0 1px 2px rgba(0, 0, 0, .3);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 12px rgba(0, 0, 0, .4);--shadow-md: 0 2px 6px rgba(0, 0, 0, .4), 0 12px 28px rgba(0, 0, 0, .5);--shadow-lg: 0 4px 12px rgba(0, 0, 0, .5), 0 24px 60px rgba(0, 0, 0, .6);--shadow-pop: 0 8px 24px rgba(0, 0, 0, .6), 0 24px 64px rgba(0, 0, 0, .7);--shadow-soft: 0 1px 2px rgba(0, 0, 0, .3);--shadow-float: 0 4px 12px rgba(0, 0, 0, .5), 0 16px 40px rgba(0, 0, 0, .6);--shadow-glow: 0 0 0 1px rgba(255, 255, 255, .05) inset;--primary: #4d8dff;--primary-hover: #7db0ff;--accent: #4d8dff;--accent-hover: #7db0ff;--danger: #ff453a;--danger-bg: rgba(255, 69, 58, .14)}body{background:var(--bg-app);color:var(--text);font-size:1.071rem;letter-spacing:-.011em}::selection{background:color-mix(in srgb,var(--brand) 85%,transparent);color:#fff}.icon-btn{border-radius:50%;transition:background .16s,color .16s,transform .1s}.icon-btn:hover{background:var(--bg-hover)}.icon-btn:focus-visible,button:focus-visible,[role=button]:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--brand);outline-offset:2px}.composer textarea:focus-visible,.composer textarea:focus{outline:none;box-shadow:none}::-webkit-scrollbar-thumb{background:#80808047;border-radius:8px}::-webkit-scrollbar-thumb:hover{background:#80808070}.sidebar,[data-theme=dark] .sidebar{width:var(--sidebar-w, 264px);min-width:var(--sidebar-w, 264px);background:var(--bg-sidebar);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);background-image:none;border-right:1px solid var(--hairline)}.sidebar:after{display:none}.sidebar-brand{padding:16px 16px 8px}.sidebar-collapse-btn{width:32px;height:32px;border-radius:10px;color:var(--text-secondary)}.sidebar-collapse-btn:hover{background:var(--bg-hover);color:var(--text)}.sidebar-brand .brand-logo{flex:0 0 auto;margin-right:auto;max-width:300px;max-height:56px}.sidebar-header{padding-top:6px;padding-bottom:10px}.new-chat-btn{height:46px;border-radius:13px;background:var(--primary);color:var(--primary-text);font-size:1rem;font-weight:600;box-shadow:var(--shadow-soft);transition:background .16s,box-shadow .16s,transform .1s}.new-chat-btn:hover{background:var(--primary-hover);box-shadow:var(--shadow-sm);transform:translateY(-1px)}.new-chat-btn:active{transform:translateY(0) scale(.98)}.sidebar-model-wrap{padding-top:2px;padding-bottom:8px}.sidebar-model-wrap .model-picker{height:46px;border-radius:13px;background:var(--bg-surface);border:1px solid var(--hairline);box-shadow:var(--shadow-xs);backdrop-filter:none;-webkit-backdrop-filter:none;transition:border-color .16s,box-shadow .16s}.sidebar-model-wrap .model-picker:hover{background:var(--bg-surface);border-color:var(--hairline-strong);box-shadow:var(--shadow-sm)}.sidebar-model-wrap .model-icon{color:var(--brand)}.sidebar-model-wrap .model-name{font-size:.964rem;font-weight:550}.chat-search{height:46px;flex-shrink:0;margin-top:4px;margin-bottom:8px;border-radius:12px;background:var(--bg-surface);border:1px solid var(--hairline);box-shadow:var(--shadow-xs);transition:border-color .16s,box-shadow .16s}.chat-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px var(--ring-brand)}.chat-search svg{color:var(--text-tertiary);flex-shrink:0}.chat-search input{font-size:.964rem}.chat-list{padding-top:2px;padding-bottom:10px;gap:2px}.chat-group-section{display:contents}.chat-group{display:flex;align-items:center;gap:6px;padding:14px 8px 6px;font-size:.786rem;font-weight:600;letter-spacing:.01em;color:var(--text-tertiary);text-transform:none;border-top:none;cursor:pointer;user-select:none;border-radius:8px;transition:color .15s}.chat-group:hover{color:var(--text-secondary)}.chat-group-chev{display:inline-flex;align-items:center;justify-content:center;color:var(--text-tertiary);flex-shrink:0;transition:transform .18s}.chat-group-section.collapsed .chat-group-chev{transform:rotate(-90deg)}.chat-group-label{flex-shrink:0}.chat-group-count{margin-left:auto;font-size:.75rem;font-weight:600;color:var(--text-tertiary);background:var(--bg-hover);padding:1px 8px;border-radius:999px;flex-shrink:0}.chat-group-section.collapsed>.chat-item-wrap{display:none}.chat-group-section:not(.collapsed)>.chat-item-wrap{display:flex}.chat-item-wrap{width:100%;min-width:0}.chat-item{width:100%}.chat-item .chat-title{min-width:0}.chat-item{height:38px;border-radius:10px;font-size:.964rem;position:relative;color:var(--text)}.chat-item .chat-icon{color:var(--text-tertiary)}.chat-item:hover{background:var(--bg-hover)}.chat-item.active{background:var(--bg-selected);color:var(--active-text);font-weight:600;box-shadow:none}.chat-item.active:before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:18px;border-radius:0 3px 3px 0;background:var(--active-bar)}.chat-item.active .chat-icon{color:var(--active-text)}.chat-item-menu{right:6px;padding:3px;border:1px solid var(--hairline);border-radius:10px;background:var(--bg-surface);box-shadow:var(--shadow-md)}.chat-item-menu .menu-btn{width:26px;height:26px;border-radius:7px;display:flex;align-items:center;justify-content:center}.chat-item-menu .menu-btn svg{width:14px;height:14px}.chat-item-menu .menu-btn.danger svg{color:var(--danger)}.chat-item-menu .menu-btn.danger:hover{background:var(--danger-bg)}.pin-mark{display:inline-flex;color:var(--brand);flex-shrink:0}.pin-mark svg{width:15px;height:15px}.chat-list-empty{font-size:.893rem;color:var(--text-tertiary);padding:28px 12px}.sidebar-footer{position:relative;padding-top:10px;padding-bottom:14px;border-top:1px solid var(--hairline);margin-top:6px}.account-chip{display:flex;align-items:center;gap:10px;width:100%;border-radius:12px;border:none;background:none;cursor:pointer;text-align:left;font-family:inherit;transition:background .16s}.account-chip:hover{background:var(--bg-hover)}.sidebar-footer .avatar{width:34px;height:34px;font-size:.929rem;flex-shrink:0;border-radius:50%}.user-meta{flex:1;min-width:0;display:flex;flex-direction:column}.user-name{font-size:.964rem;font-weight:600}.quota{font-size:.821rem;color:var(--text-tertiary);margin-top:1px}.quota.low{color:var(--danger);font-weight:600}.account-chip .account-chevron{color:var(--text-tertiary);flex-shrink:0;display:flex;transition:transform .16s}.account-chip.menu-open .account-chevron{transform:rotate(180deg)}.user-menu{position:absolute;left:8px;right:8px;bottom:calc(100% + 4px);background:var(--bg-surface);border:1px solid var(--hairline);border-radius:14px;box-shadow:var(--shadow-pop);padding:5px;z-index:60}.user-menu-item{display:flex;align-items:center;gap:10px;width:100%;padding:9px 11px;border:none;background:none;border-radius:9px;font-size:.964rem;color:var(--text);cursor:pointer;text-align:left;font-family:inherit;transition:background .13s,color .13s}.user-menu-item svg{width:16px;height:16px;color:var(--text-secondary);flex-shrink:0}.user-menu-item:hover{background:var(--bg-hover)}.user-menu-item.danger{color:var(--danger)}.user-menu-item.danger svg{color:var(--danger)}.user-menu-item.danger:hover{background:var(--danger-bg)}.user-menu-sep{height:1px;background:var(--hairline);margin:4px 6px}.footer-actions,.footer-btn{display:none}.main{background:var(--bg-app)}.topbar{height:54px;padding:0 18px;background:transparent;border-bottom:1px 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.msg-content{font-size:1.071rem;line-height:1.7}.msg.assistant pre{border:0;border-radius:12px;background:var(--bg-code)}.msg.assistant pre:has(.code-block){margin:0;padding:0;border:0;border-radius:0;background:transparent;box-shadow:none}.code-block{border:0;border-radius:0;background:transparent;box-shadow:none}.code-header{background:color-mix(in srgb,#000 9%,var(--bg-code));border-bottom:0}[data-theme=dark] .code-header{background:color-mix(in srgb,#fff 14%,var(--bg-code))}.msg.assistant blockquote{border:0;background:var(--bg-code)}.msg.assistant a{color:var(--brand)}.reasoning-wrap,.tool-call{border:1px solid var(--hairline);border-radius:12px;background:var(--bg-surface-2)}.msg .msg-actions,.msg .quick-actions,.msg-actions+.follow-ups,.msg>.msg-actions~.follow-ups{flex:1 1 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