:root{--bg-primary: #F5F5F4;--bg-secondary: #ffffff;--bg-tertiary: #E7E5E4;--bg-quaternary: #f0efee;--text-primary: #3F3F46;--text-secondary: #78716C;--text-tertiary: #7C6F64;--text-quaternary: #B6A186;--border-primary: #E7E5E4;--border-secondary: #d6d3d1;--accent-primary: #7C6F64;--accent-secondary: #6b5f54;--accent-success: #059669;--accent-error: #dc2626;--shadow: rgba(124, 111, 100, .08);--shadow-lg: rgba(124, 111, 100, .12);--streaming-bg: #F5F5F4;--chart-bg: #ffffff;--gradient-primary: linear-gradient(135deg, #B6A186 0%, #7C6F64 100%);--gradient-accent: linear-gradient(135deg, #7C6F64 0%, #6b5f54 100%);--blur: blur(8px)}.dark-mode{--bg-primary: #2a2520;--bg-secondary: #3a342e;--bg-tertiary: #4a433c;--bg-quaternary: #5a524a;--text-primary: #F5F5F4;--text-secondary: #E7E5E4;--text-tertiary: #B6A186;--text-quaternary: #9c8f7e;--border-primary: #4a433c;--border-secondary: #5a524a;--accent-primary: #B6A186;--accent-secondary: #9c8f7e;--accent-success: #10b981;--accent-error: #f87171;--shadow: rgba(0, 0, 0, .3);--shadow-lg: rgba(0, 0, 0, .5);--streaming-bg: #3a342e;--chart-bg: #3a342e;--gradient-primary: linear-gradient(135deg, #B6A186 0%, #7C6F64 100%);--gradient-accent: linear-gradient(135deg, #7C6F64 0%, #6b5f54 100%);--blur: blur(8px)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg-primary);color:var(--text-primary);transition:background-color .3s ease,color .3s ease;line-height:1.6;letter-spacing:-.01em}.app{display:flex;height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;overflow:hidden;background:var(--bg-primary);position:relative}@media (max-width: 1024px){.sidebar{width:260px}}@media (max-width: 768px){.sidebar{position:fixed;top:0;left:0;height:100vh;z-index:1000;box-shadow:0 20px 25px -5px 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var(--border-primary);overflow:visible;opacity:1;visibility:visible}.main-content.sidebar-hidden{margin-left:280px;width:calc(100% - 280px)}}.app-header{padding:1rem 1.5rem;border-bottom:1px solid var(--border-primary);display:flex;justify-content:space-between;align-items:center;background:var(--bg-secondary);position:sticky;top:0;z-index:10;transition:all .3s ease;-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);box-shadow:0 1px 3px var(--shadow);height:72px;box-sizing:border-box}.header-left{display:flex;align-items:center;gap:1.5rem}.header-right{display:flex;align-items:center;gap:1rem}.desktop-header{display:flex}.mobile-header{display:none}.desktop-only{display:block}.profile-menu{position:relative}.profile-btn{padding:.75rem;background:var(--bg-quaternary);border:1px solid var(--border-primary);border-radius:.75rem;cursor:pointer;font-size:1.1rem;transition:all .2s cubic-bezier(.4,0,.2,1);box-shadow:0 2px 4px 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.toggle-slider{transform:translate(20px)}.connection-status{display:flex;align-items:center;gap:6px;padding:4px 8px;border-radius:12px;font-size:12px;font-weight:500;margin-left:16px}.connection-status.connected,.dark-mode .connection-status.connected{background-color:var(--accent-success);color:#fff}.connection-status.disconnected,.dark-mode .connection-status.disconnected{background-color:var(--accent-error);color:#fff}.connection-status .status-dot{width:6px;height:6px;border-radius:50%;background-color:currentColor;animation:pulse 2s infinite}.connection-status .status-text{font-size:11px;font-weight:600}.logout-btn{padding:.75rem 1rem;background:var(--bg-quaternary);border:1px solid var(--border-primary);border-radius:.75rem;cursor:pointer;font-size:.875rem;font-weight:500;color:var(--text-primary);transition:all .2s cubic-bezier(.4,0,.2,1);box-shadow:0 2px 4px 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.message-item{background:var(--gradient-accent);color:#fff;border-radius:1.25rem 1.25rem .375rem}.message-group.assistant .message-item{background:transparent;color:var(--text-primary);border-radius:1.25rem 1.25rem 1.25rem .375rem}.message-sender-label{font-size:.75rem;font-weight:600;margin-bottom:.5rem;opacity:.8;text-transform:uppercase;letter-spacing:.5px}.message-group.user .message-sender-label{color:#ffffffe6;text-align:right}.message-group.assistant .message-sender-label{color:var(--text-tertiary);text-align:left}.message-item:first-child{border-top-left-radius:1.25rem;border-top-right-radius:1.25rem}.message-item:last-child{border-bottom-left-radius:1.25rem;border-bottom-right-radius:1.25rem;margin-bottom:0}.message-group.user .message-item:first-child{border-top-right-radius:.5rem}.message-group.user .message-item:last-child{border-bottom-right-radius:.5rem}.message-group.assistant .message-item:first-child{border-top-left-radius:.5rem}.message-group.assistant 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