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var(--transition-fast)}.btn-secondary{background-color:transparent;color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover{background-color:var(--bg-hover)}.btn-danger{background-color:var(--danger,#ef4444);color:#fff}.btn-danger:hover{background-color:#dc2626}.custom-dialog{margin:auto;padding:0;border:none;border-radius:var(--radius-lg);background:var(--bg-secondary);color:var(--text-primary);box-shadow:0 10px 25px rgba(0,0,0,.5);max-width:400px;width:90%}.custom-dialog::backdrop{background:rgba(0,0,0,.6);backdrop-filter:blur(2px)}.dialog-content{padding:var(--space-6)}.dialog-content h3{margin-top:0;margin-bottom:var(--space-2);font-size:1.25rem}.dialog-content p{margin-bottom:var(--space-6)}.dialog-actions{display:flex;justify-content:flex-end;gap:var(--space-3)}button{font-family:inherit;border:none;background:0 0;padding:.5rem;transition:color var(--transition-fast),background-color 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img{max-width:100%;height:auto;border-radius:6px;margin:.5em 0}ol,ul{padding-left:2rem}hr{margin:.5rem 0}.sidebar-header-actions .toolbar-btn:hover .material-icons,.ͼc{color:var(--text-primary)}#sidebar{width:20rem;display:flex;flex-direction:column;overflow:hidden;transition:width var(--transition-medium);flex-shrink:0}#sidebar.collapsed{width:0;border-right:none}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-2) var(--space-3);font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);flex-shrink:0;white-space:nowrap}.tab-item,.tree-item{display:flex;font-size:.8rem;transition:background-color var(--transition-fast),color var(--transition-fast);user-select:none;white-space:nowrap;cursor:pointer}.sidebar-header-actions{display:flex;align-items:center;gap:2px}.sidebar-header-actions .toolbar-btn{padding:2px 4px;border:none;background:0 0}.sidebar-header-actions .toolbar-btn 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.tree-name{white-space:nowrap}.tree-folder-children{overflow:hidden}.tree-folder-children.collapsed{display:none}.tree-item .tree-modified-dot{width:6px;height:6px;border-radius:50%;background-color:var(--accent-color);margin-left:auto;flex-shrink:0}#tab-bar{display:flex;align-items:stretch;height:34px;background-color:var(--bg-secondary);overflow-x:auto;overflow-y:hidden;flex-shrink:0;scrollbar-width:none}#tab-bar::-webkit-scrollbar{display:none}.tab-item{align-items:center;padding:0 var(--space-3);color:var(--text-muted);max-width:180px;flex-shrink:0;position:relative}.tab-item.active{background-color:var(--bg-primary);color:var(--text-primary);border-bottom:2px solid var(--accent-color)}.tab-item .tab-name{white-space:nowrap;margin-right:var(--space-1)}.tab-item .tab-modified-dot{width:6px;height:6px;border-radius:50%;background-color:var(--accent-color);flex-shrink:0;margin-right:var(--space-1)}.tab-add-btn,.tab-item 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var(--space-4);border-radius:var(--radius-md);font-size:.85rem;box-shadow:0 4px 12px rgba(0,0,0,.3);z-index:1000;animation:.2s ease-out toast-in,.2s ease-in 2.8s forwards toast-out;pointer-events:none}@keyframes toast-in{from{opacity:0;transform:translateX(-50%) translateY(10px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}@keyframes toast-out{from{opacity:1;transform:translateX(-50%) translateY(0)}to{opacity:0;transform:translateX(-50%) translateY(10px)}}@media print{:root,:root[data-theme=dark]{--bg-primary:#ffffff!important;--bg-secondary:#ffffff!important;--bg-tertiary:transparent!important;--text-primary:#000000!important;--text-secondary:#333333!important;--text-muted:#666666!important;--border-color:#cccccc!important;--accent-color:#2563eb!important;--accent-hover:#1d4ed8!important}#preview-container blockquote{border-left:3px solid #ccc!important;color:#555!important;background:0 0!important}#preview-container pre{background:0 0!important;border:1px solid #ccc!important}#preview-container code{color:#000!important;background:0 0!important}}