:root{--bg-primary: #0e0d14;--bg-secondary: #16141f;--bg-glass: rgba(22, 20, 31, .85);--bg-glass-hover: rgba(28, 25, 40, .95);--border-glass: rgba(var(--overlay-rgb), .07);--border-active: rgba(140, 120, 252, .5);--text-primary: #eae8f2;--text-secondary: #9890b0;--text-muted: #625d7a;--accent: #8b78f5;--accent-hover: #a394f8;--accent-glow: rgba(139, 120, 245, .25);--success: #10b981;--warning: #f59e0b;--error: #ef4444;--surface: #16161f;--border: rgba(var(--overlay-rgb), .08);--bg-surface: #1f2937;--text: var(--text-primary);--sidebar-bg: rgba(var(--overlay-rgb), .03);--bg-gradient-accent: #1e1b4b;--overlay-rgb: 255, 255, 255;--sidebar-width: 300px;--transition: .2s cubic-bezier(.4, 0, .2, 1)}:root[data-theme=light]{--bg-primary: #f6f6fb;--bg-secondary: #ffffff;--bg-glass: rgba(255, 255, 255, .85);--bg-glass-hover: rgba(248, 248, 252, .95);--border-glass: rgba(20, 18, 33, .1);--border-active: rgba(124, 92, 240, .5);--text-primary: #1b1930;--text-secondary: #565073;--text-muted: #8a8499;--accent: #7c5cf0;--accent-hover: #6a48e6;--accent-glow: rgba(124, 92, 240, .22);--surface: #ffffff;--border: rgba(20, 18, 33, .12);--bg-surface: #eceef3;--sidebar-bg: rgba(20, 18, 33, .03);--bg-gradient-accent: #e7e3ff;--overlay-rgb: 20, 18, 33}:root{--primary-color: var(--accent);--surface-color: var(--bg-secondary);--bg-color: var(--bg-primary);--border-color: var(--border);--error-color: #ef4444;--success-color: #10b981}body,.chat-messages,.admin-main,.history-sidebar,.sidebar-inner{transition:background-color var(--transition),color var(--transition)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;overflow:hidden;height:100vh}#root{height:100vh;display:flex}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:rgba(var(--overlay-rgb),.1);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:rgba(var(--overlay-rgb),.2)}.brand-logo{display:block;width:auto;flex:none;object-fit:contain}.brand-name{transform:translateY(-9px)}.brand-logo-sm{height:56px}.brand-logo-lg{height:112px}.login-page{display:flex;align-items:center;justify-content:center;width:100%;height:100vh;background:radial-gradient(ellipse at top,var(--bg-gradient-accent) 0%,var(--bg-primary) 60%)}.login-card{background:var(--bg-glass);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--border-glass);border-radius:20px;padding:48px;text-align:center;max-width:420px;width:90%;box-shadow:0 25px 50px #00000080}.login-card h1{font-size:2.75rem;font-weight:700;margin-bottom:8px;color:var(--accent);display:flex;align-items:center;justify-content:center;gap:11px}.login-card h1 .brand-name{transform:translateY(4px)}.login-card p{color:var(--text-secondary);margin-bottom:32px}.login-btn{display:inline-flex;align-items:center;gap:10px;padding:14px 32px;background:var(--accent);color:#fff;border:none;border-radius:12px;font-size:1rem;font-weight:600;cursor:pointer;transition:var(--transition);width:100%;justify-content:center}.login-btn:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 8px 24px var(--accent-glow)}.app-layout{display:flex;width:100%;height:100vh}.sidebar{background:var(--bg-secondary);border-right:1px solid var(--border-glass);display:flex;flex-direction:column;height:100vh;overflow:hidden;position:relative;flex-shrink:0}.sidebar-inner{display:flex;flex-direction:column;flex:1;min-height:0;overflow:hidden}.sidebar-top{flex-shrink:0}.sidebar-scroll{flex:1;min-height:0;display:flex;flex-direction:column;overflow:hidden}.sidebar-resize-handle{position:absolute;top:0;right:0;width:5px;height:100%;cursor:col-resize;z-index:10;transition:background var(--transition)}.sidebar-resize-handle:hover,.sidebar-resize-handle:active{background:var(--accent);opacity:.5}.sidebar-vresize-handle{flex-shrink:0;height:10px;cursor:row-resize;position:relative;background:transparent;transition:background var(--transition)}.sidebar-vresize-handle:before{content:"";position:absolute;left:0;right:0;top:50%;height:1px;transform:translateY(-50%);background:var(--border-glass)}.sidebar-vresize-handle:hover:before,.sidebar-vresize-handle:active:before{height:3px;background:var(--accent);opacity:.6}.admin-sidebar{position:relative;overflow-y:auto}.profile-widget{position:absolute;top:14px;right:18px;z-index:50}.profile-avatar-btn{width:36px;height:36px;border-radius:50%;background:var(--accent);color:#fff;border:none;cursor:pointer;font-size:.9rem;font-weight:700;display:flex;align-items:center;justify-content:center;transition:background var(--transition),transform var(--transition);box-shadow:0 2px 8px #0006}.profile-avatar-btn:hover{background:var(--accent-hover);transform:scale(1.05)}.profile-dropdown{position:absolute;top:calc(100% + 8px);right:0;min-width:220px;background:var(--bg-secondary);border:1px solid var(--border-glass);border-radius:12px;padding:14px;box-shadow:0 8px 32px #00000080;display:flex;flex-direction:column;gap:4px}.profile-dropdown-name{font-size:.9rem;font-weight:600;color:var(--text-primary)}.profile-dropdown-email{font-size:.78rem;color:var(--text-muted);word-break:break-all}.profile-dropdown-version{margin-top:4px;font-size:.75rem;color:var(--text-muted);display:flex;align-items:center;gap:6px}.profile-dropdown-divider{height:1px;background:var(--border-glass);margin:8px 0 4px}.profile-dropdown-signout{display:flex;align-items:center;gap:8px;background:none;border:none;color:var(--text-secondary);cursor:pointer;font-size:.85rem;padding:6px 4px;border-radius:6px;width:100%;text-align:left;transition:color var(--transition),background var(--transition)}.profile-dropdown-signout:hover{color:var(--error);background:#ef444414}.profile-dropdown-item{display:flex;align-items:center;justify-content:space-between;gap:8px;background:none;border:none;color:var(--text-secondary);cursor:pointer;font-size:.85rem;padding:6px 4px;border-radius:6px;width:100%;text-align:left;transition:color var(--transition),background var(--transition)}.profile-dropdown-item:hover{color:var(--text-primary);background:rgba(var(--overlay-rgb),.06)}.profile-dropdown-item-label{display:flex;align-items:center;gap:8px}.theme-switch{position:relative;width:34px;height:18px;border-radius:999px;background:rgba(var(--overlay-rgb),.18);flex-shrink:0;transition:background var(--transition)}.theme-switch--on{background:var(--accent)}.theme-switch-knob{position:absolute;top:2px;left:2px;width:14px;height:14px;border-radius:50%;background:#fff;transition:transform var(--transition)}.theme-switch--on .theme-switch-knob{transform:translate(16px)}.export-widget{position:absolute;top:14px;right:66px;z-index:50}.export-btn{display:flex;align-items:center;gap:6px;height:36px;padding:0 14px;border-radius:18px;background:var(--bg-glass);border:1px solid var(--border-glass);color:var(--text-secondary);cursor:pointer;font-size:.82rem;font-weight:500;transition:var(--transition);box-shadow:0 2px 8px #0000004d}.export-btn:hover:not(:disabled){color:var(--accent);border-color:var(--border-active)}.export-btn:disabled{opacity:.6;cursor:default}.export-dropdown{position:absolute;top:calc(100% + 8px);right:0;min-width:180px;background:var(--bg-secondary);border:1px solid var(--border-glass);border-radius:12px;padding:6px;box-shadow:0 8px 32px #00000080;display:flex;flex-direction:column;gap:2px}.export-dropdown-item{display:flex;align-items:center;gap:10px;background:none;border:none;color:var(--text-secondary);cursor:pointer;font-size:.85rem;padding:9px 10px;border-radius:8px;width:100%;text-align:left;transition:var(--transition)}.export-dropdown-item:hover{color:var(--text-primary);background:var(--bg-glass-hover)}.message-actions{display:flex;align-items:center;gap:6px;margin-top:8px}.msg-action-btn{display:inline-flex;align-items:center;gap:4px;background:none;border:1px solid rgba(var(--overlay-rgb),.12);border-radius:5px;cursor:pointer;font-size:11px;padding:3px 8px;transition:color .15s,border-color .15s}.msg-action-btn:disabled{cursor:default;opacity:.7}.msg-download-wrap{position:relative}.msg-download-menu{position:absolute;bottom:calc(100% + 6px);left:0;min-width:160px;background:var(--bg-secondary);border:1px solid var(--border-glass);border-radius:10px;padding:5px;box-shadow:0 8px 28px #00000080;display:flex;flex-direction:column;gap:2px;z-index:60}.msg-download-menu button{display:flex;align-items:center;gap:8px;background:none;border:none;color:var(--text-secondary);cursor:pointer;font-size:.8rem;padding:8px 9px;border-radius:7px;width:100%;text-align:left;transition:var(--transition)}.msg-download-menu button:hover{color:var(--text-primary);background:var(--bg-glass-hover)}.sidebar-header{padding:8px 16px 10px;border-bottom:1px solid var(--border-glass)}.sidebar-header h2{font-size:1.75rem;font-weight:700;line-height:1.05;display:flex;align-items:baseline;flex-wrap:wrap;gap:6px;color:var(--accent)}.brand-version{display:flex;align-items:center;justify-content:flex-end;gap:5px;margin-top:-3px;line-height:1;font-size:.72rem;font-weight:500;letter-spacing:.02em;color:var(--text-muted);white-space:nowrap}.sidebar-header .user-info{font-size:.8rem;color:var(--text-muted);margin-top:4px}.new-chat-btn{margin:5px;padding:8px;background:transparent;border:1px dashed var(--border-glass);border-radius:10px;color:var(--text-secondary);cursor:pointer;font-size:.9rem;transition:var(--transition);display:flex;align-items:center;justify-content:center;gap:8px}.new-chat-btn:hover{border-color:var(--accent);color:var(--accent);background:#6366f10d}.history-list{flex:1;min-height:0;overflow-y:auto;padding:8px 12px;display:flex;flex-direction:column}.history-list--projects{flex:0 0 auto}.history-controls{flex-shrink:0}.history-controls{padding:8px 10px 4px;display:flex;flex-direction:column;gap:6px;border-bottom:1px solid var(--border-glass)}.history-search-wrap{position:relative;display:flex;align-items:center}.history-search-icon{position:absolute;left:8px;opacity:.4;pointer-events:none}.history-search{width:100%;background:rgba(var(--overlay-rgb),.05);border:1px solid var(--border-glass);border-radius:6px;padding:5px 28px 5px 26px;color:var(--text-primary);font-size:.8rem;outline:none;transition:border-color 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