:root{color-scheme:light;--color-bg-base: #ffffff;--color-bg-subtle: #f8f9fa;--color-bg-muted: #f1f3f5;--color-bg-emphasis: #e9ecef;--color-bg-overlay: rgba(255, 255, 255, .95);--color-text-default: #1f2937;--color-text-muted: #6b7280;--color-text-subtle: #9ca3af;--color-text-on-emphasis: #ffffff;--color-border-default: #e5e7eb;--color-border-muted: #f1f3f5;--color-border-emphasis: #d1d5db;--color-primary: #3b82f6;--color-primary-hover: #2563eb;--color-primary-subtle: #eff6ff;--color-primary-muted: rgba(59, 130, 246, .12);--color-danger: #ef4444;--color-danger-subtle: rgba(239, 68, 68, .1);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .06);--shadow-md: 0 4px 12px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .12);--shadow-overlay: 0 8px 30px rgba(0, 0, 0, .12), 0 0 0 1px rgba(0, 0, 0, .04);--glass-bg: rgba(255, 255, 255, .85);--glass-border: rgba(255, 255, 255, .3);--pill-dot-bg: linear-gradient(135deg, #e5e7eb 0%, #d1d5db 100%);--pill-dot-shadow: 0 1px 3px rgba(0, 0, 0, .08), inset 0 1px 0 rgba(255, 255, 255, .5);--pill-dot-hover-bg: linear-gradient(135deg, #d1d5db 0%, #9ca3af 100%);--pill-dot-hover-shadow: 0 4px 8px rgba(0, 0, 0, .15), inset 0 1px 0 rgba(255, 255, 255, .6);--scrollbar-thumb: #d1d5db;--scrollbar-track: transparent;--color-code-bg: #f6f8fa;--color-code-border: #e5e7eb;--color-code-text: #1f2937}[data-theme=dark]{color-scheme:dark;--color-bg-base: hsl(220, 13%, 8%);--color-bg-subtle: hsl(220, 12%, 11%);--color-bg-muted: hsl(220, 11%, 14%);--color-bg-emphasis: hsl(220, 10%, 18%);--color-bg-overlay: rgba(18, 20, 26, .95);--color-text-default: #e4e5e7;--color-text-muted: #9ca3af;--color-text-subtle: #6b7280;--color-text-on-emphasis: #ffffff;--color-border-default: hsl(220, 10%, 20%);--color-border-muted: hsl(220, 10%, 15%);--color-border-emphasis: hsl(220, 10%, 28%);--color-primary: #60a5fa;--color-primary-hover: #93c5fd;--color-primary-subtle: rgba(96, 165, 250, .12);--color-primary-muted: rgba(96, 165, 250, .08);--color-danger: 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p,.empty-state p{margin:var(--space-md) 0 0 0;font-size:14px;color:var(--text-secondary)}.empty-state small{font-size:12px;color:var(--text-muted);margin-top:var(--space-sm)}.loading-spinner{width:28px;height:28px;border:2.5px solid var(--border-light);border-top:2.5px solid var(--primary-blue);border-radius:var(--radius-full);animation:spin .9s linear infinite}.loading-spinner.small{width:20px;height:20px;border-width:2px}.error-message{color:var(--danger)}.error-message p{margin:0 0 var(--space-md) 0}.retry-button{margin-top:var(--space-sm);padding:var(--space-sm) var(--space-lg);background:var(--bg-white);color:var(--text-primary);border:1px solid var(--border-medium);border-radius:var(--radius-sm);cursor:pointer;font-size:13px;font-weight:500;transition:all var(--duration-normal) var(--ease-out)}.retry-button:hover{background:var(--bg-secondary);border-color:var(--primary-blue);color:var(--primary-blue)}.auth-prompt{padding:var(--space-2xl);text-align:center;color:var(--text-secondary)}.auth-prompt p{margin:0;line-height:1.6;font-size:14px}.conversation-item[draggable=true]{cursor:grab}.conversation-item[draggable=true]:active:not(:has(.chat-item-menu-trigger:active)){cursor:grabbing;opacity:.5}.folders-section{padding-top:var(--space-sm);margin-top:2px;border-top:1px solid var(--border-light)}.folders-header{margin:0 var(--space-md) 4px var(--space-md);font-size:13px;font-weight:600;color:var(--text-primary);letter-spacing:.01em;display:flex;align-items:center;gap:6px}.folders-header-icon{flex-shrink:0;vertical-align:middle}.folder-wrapper{margin-bottom:2px}.folder-item{display:flex;align-items:center;gap:6px;padding:4px var(--space-sm);margin:0 var(--space-sm);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--duration-normal) var(--ease-out);border:1px solid transparent;min-height:28px;-webkit-user-select:none;user-select:none}.folder-item:hover{background:var(--bg-secondary);border-color:var(--border-light)}.folder-item.drag-over{background:var(--primary-blue-light);border-color:var(--primary-blue);border-style:dashed}.folder-chevron{font-size:14px;color:var(--text-muted);transition:transform var(--duration-fast) var(--ease-out);flex-shrink:0;width:14px;text-align:center}.folder-chevron.open{transform:rotate(90deg)}.folder-icon{font-size:14px;flex-shrink:0}.folder-name{flex:1;min-width:0;font-size:13px;font-weight:500;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;padding:2px 4px;border-radius:var(--radius-sm)}.folder-name:hover{background:#007bff0f}.folder-name-input{flex:1;min-width:0;font-size:13px;font-weight:500;color:var(--text-primary);border:1px solid var(--primary-blue);border-radius:var(--radius-sm);padding:2px 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