:root{--color-primary:#3b82f6;--color-primary-hover:#2563eb;--color-primary-light:#dbeafe;--color-secondary:#64748b;--color-secondary-hover:#475569;--color-success:#10b981;--color-danger:#ef4444;--color-danger-light:#fee2e2;--color-error:#ef4444;--color-warning:#f59e0b;--bg-primary:#fff;--bg-secondary:#f8fafc;--bg-tertiary:#f1f5f9;--bg-hover:#e2e8f0;--text-primary:#0f172a;--text-secondary:#475569;--text-tertiary:#94a3b8;--text-inverse:#fff;--border-primary:#e2e8f0;--border-secondary:#cbd5e1;--border-focus:var(--color-primary);--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a;--spacing-xs:.25rem;--spacing-sm:.35rem;--spacing-md:.45rem;--spacing-lg:.6rem;--spacing-xl:1rem;--spacing-2xl:2rem;--radius-sm:.25rem;--radius-md:.5rem;--radius-lg:.75rem;--radius-xl:1rem;--font-family:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono:"Consolas", "Monaco", "Courier New", monospace;--transition-fast:.15s ease-in-out;--transition-base:.25s ease-in-out;--transition-slow:.35s ease-in-out;--sidebar-width:280px;--toolbar-height:40px;--footer-height:30px;--safe-area-inset-top:env(safe-area-inset-top,0px);--safe-area-inset-right:env(safe-area-inset-right,0px);--safe-area-inset-bottom:env(safe-area-inset-bottom,0px);--safe-area-inset-left:env(safe-area-inset-left,0px)}*{box-sizing:border-box;margin:0;padding:0}#app svg{flex-shrink:0;width:24px;height:24px}html{-webkit-text-size-adjust:100%;text-size-adjust:100%}body{margin:0}#app{height:100%;font-family:var(--font-family);color:var(--text-primary);background-color:var(--bg-secondary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;flex-direction:column;line-height:1.6;display:flex}.app-container{flex:1;display:flex;overflow:hidden}.toolbar{min-height:var(--toolbar-height);background-color:var(--bg-primary);border-bottom:1px solid var(--border-primary);padding:var(--safe-area-inset-top) var(--spacing-lg) 0;padding-left:max(var(--spacing-lg), var(--safe-area-inset-left));padding-right:max(var(--spacing-lg), var(--safe-area-inset-right));justify-content:space-between;align-items:center;gap:var(--spacing-lg);display:flex}.toolbar-left,.toolbar-center,.toolbar-right{align-items:center;gap:var(--spacing-md);display:flex}.toolbar-left{flex:1}.toolbar-center{flex:2;justify-content:center}.toolbar-right{flex:1;justify-content:flex-end}.breadcrumb{align-items:center;gap:var(--spacing-sm);flex-wrap:nowrap;min-width:0;display:flex}:is(body,#app) .breadcrumb-item{padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-md);cursor:pointer;color:var(--text-secondary);transition:all var(--transition-fast);white-space:nowrap;background-color:#0000;border:none;align-items:center;font-size:.875rem;font-weight:500;display:flex}.breadcrumb-item:hover{background-color:var(--bg-hover);color:var(--text-primary)}.breadcrumb-item:first-child{padding:var(--spacing-xs);font-size:1.25rem}.breadcrumb-current{color:var(--text-primary);cursor:default;font-weight:600}.breadcrumb-current:hover{background-color:#0000}.breadcrumb-separator{color:var(--text-tertiary);user-select:none;font-size:.875rem}:is(body,#app) .btn-icon{border-radius:var(--radius-md);cursor:pointer;width:40px;height:40px;color:var(--text-primary);transition:background-color var(--transition-fast);background-color:#0000;border:none;justify-content:center;align-items:center;font-size:1.5rem;display:flex}.btn-icon:hover{background-color:var(--bg-hover)}.footer{min-height:var(--footer-height);background-color:var(--bg-primary);border-top:1px solid var(--border-primary);padding:0 var(--spacing-lg) var(--safe-area-inset-bottom);padding-left:max(var(--spacing-lg), var(--safe-area-inset-left));padding-right:max(var(--spacing-lg), var(--safe-area-inset-right));color:var(--text-tertiary);justify-content:space-between;align-items:center;font-size:.75rem;display:flex}.footer-left,.footer-right{align-items:center;gap:var(--spacing-md);display:flex}.sync-status{padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-sm);transition:background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);border:1px solid #0000;align-items:center;display:flex;position:relative;overflow:hidden}.sync-status[data-status=idle],.sync-status[data-status=connected],.sync-status[data-status=error]{cursor:pointer;border-color:var(--border-primary);background-color:var(--bg-secondary)}.sync-status[data-status=idle]:hover,.sync-status[data-status=connected]:hover,.sync-status[data-status=error]:hover{background-color:var(--bg-hover);box-shadow:0 1px 2px #00000014}.sync-status[data-status=idle]:active,.sync-status[data-status=connected]:active,.sync-status[data-status=error]:active{background-color:var(--bg-hover);box-shadow:none;transform:translateY(.5px)}.sync-status[data-status=syncing]{cursor:wait}.sync-status[data-status=offline]{cursor:default}.sync-indicator{font-size:.875rem;line-height:1}.sync-status[data-status=connected] .sync-indicator{color:var(--color-success)}.sync-status[data-status=syncing] .sync-indicator{color:var(--color-warning);animation:1s linear infinite spin}.sync-status[data-status=idle] .sync-indicator,.sync-status[data-status=offline] .sync-indicator{color:var(--text-tertiary)}.sync-status[data-status=error] .sync-indicator{color:var(--color-error)}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.sync-progress{background-color:var(--color-warning);border-radius:1px;width:40%;height:2px;display:none;position:absolute;bottom:0;left:0}.sync-status[data-status=syncing] .sync-progress{animation:1.4s ease-in-out infinite sync-progress-slide;display:block}@keyframes sync-progress-slide{0%{width:40%;left:-40%}50%{width:40%;left:60%}to{width:40%;left:100%}}.sidebar{width:var(--sidebar-width);background-color:var(--bg-primary);border-right:1px solid var(--border-primary);flex-direction:column;display:flex;overflow:hidden}.sidebar-header{padding:var(--spacing-md);border-bottom:1px solid var(--border-primary);gap:var(--spacing-sm);flex-direction:column;display:flex}.search-input{width:100%;padding:var(--spacing-sm) var(--spacing-md);border:1px solid var(--border-primary);border-radius:var(--radius-md);background-color:var(--bg-secondary);color:var(--text-primary);font-family:var(--font-family);font-size:.875rem}.search-input:focus{border-color:var(--border-focus);background-color:var(--bg-primary);outline:none}.search-input::placeholder{color:var(--text-tertiary)}.notes-list{padding:var(--spacing-sm);flex:1;overflow-y:auto}.tree-folder{margin-bottom:var(--spacing-xs)}.tree-folder-header{align-items:center;gap:var(--spacing-xs);padding:var(--spacing-xs) var(--spacing-sm);cursor:pointer;border-radius:var(--radius-sm);transition:background-color var(--transition-fast);user-select:none;display:flex}.tree-folder-header:hover{background-color:var(--bg-hover)}.tree-folder-header.active{background-color:var(--color-primary-light);font-weight:600}.tree-folder-header.active .tree-folder-title{color:var(--color-primary)}.tree-folder-icon{flex-shrink:0;font-size:.875rem}.tree-folder-title{color:var(--text-primary);text-overflow:ellipsis;white-space:nowrap;flex:1;font-size:.8125rem;font-weight:600;overflow:hidden}.tree-item-count{color:var(--text-tertiary);flex-shrink:0;font-size:.75rem}.tree-folder-content{padding-left:var(--spacing-md)}.tree-folder-content.collapsed{display:none}.tree-folder-content.expanded{display:block}.tree-note{align-items:center;gap:var(--spacing-xs);padding:var(--spacing-xs) var(--spacing-sm);cursor:pointer;border-radius:var(--radius-sm);transition:background-color var(--transition-fast);margin-bottom:1px;display:flex;position:relative}.tree-note:hover{background-color:var(--bg-hover)}.tree-note.active{background-color:var(--color-primary-light)}.tree-note-icon{flex-shrink:0;font-size:.75rem}.tree-note-title{color:var(--text-primary);text-overflow:ellipsis;white-space:nowrap;flex:1;font-size:.8125rem;overflow:hidden}.tree-note-delete{border-radius:var(--radius-sm);cursor:pointer;opacity:.6;width:20px;height:20px;transition:all var(--transition-fast);color:var(--color-danger);background-color:#0000;border:none;flex-shrink:0;justify-content:center;align-items:center;padding:0;display:flex}.tree-note:hover .tree-note-delete{opacity:1}.tree-note-delete:hover{background-color:var(--color-danger);color:var(--text-inverse)}.tree-section{margin-top:var(--spacing-md)}.tree-section-header{color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.05em;padding:var(--spacing-xs) var(--spacing-sm);margin-bottom:var(--spacing-xs);font-size:.75rem;font-weight:600}.sidebar-note-item{align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);margin-bottom:var(--spacing-xs);background-color:var(--bg-secondary);border:1px solid var(--border-primary);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);display:flex;position:relative}.sidebar-note-item:hover{background-color:var(--bg-tertiary);border-color:var(--border-secondary);transform:translate(2px)}.sidebar-note-item.active{background-color:var(--color-primary-light);border-color:var(--color-primary)}.sidebar-note-content{flex:1;min-width:0}.sidebar-note-title{color:var(--text-primary);margin-bottom:var(--spacing-xs);text-overflow:ellipsis;white-space:nowrap;font-size:.875rem;font-weight:500;overflow:hidden}.sidebar-note-date{color:var(--text-tertiary);font-size:.75rem}.sidebar-note-delete{border-radius:var(--radius-sm);cursor:pointer;opacity:0;width:24px;height:24px;transition:all var(--transition-fast);color:var(--color-danger);background-color:#0000;border:none;flex-shrink:0;justify-content:center;align-items:center;padding:0;display:flex}.sidebar-note-item:hover .sidebar-note-delete{opacity:1}.sidebar-note-delete:hover{background-color:var(--color-danger);color:var(--text-inverse)}.main-content{background-color:var(--bg-secondary);flex:1;display:flex;overflow:auto}.welcome-screen{text-align:center;color:var(--text-secondary)}.welcome-screen h2{color:var(--text-primary);margin-bottom:var(--spacing-md);font-size:2rem;font-weight:600}#app button{font-family:var(--font-family);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);border:none;outline:none;font-size:.875rem;font-weight:500}#app button:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px}:is(body,#app) :is(.btn-primary,.btn-secondary){font-family:var(--font-family);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);border:none;outline:none;font-size:.875rem;font-weight:500;line-height:1.25}:is(body,#app) .btn-primary{background-color:var(--color-primary);color:var(--text-inverse);padding:var(--spacing-sm) var(--spacing-md);width:auto}.sidebar-header .btn-primary{width:100%}.btn-primary:hover{background-color:var(--color-primary-hover)}.btn-primary:active{transform:scale(.98)}:is(body,#app) .btn-secondary{background-color:var(--color-secondary);color:var(--text-inverse);padding:var(--spacing-sm) var(--spacing-md);width:auto}.btn-secondary:hover{background-color:var(--color-secondary-hover)}.btn-secondary:active{transform:scale(.98)}:is(body,#app) .btn-danger{background-color:var(--color-danger);color:var(--text-inverse);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-md);cursor:pointer;font-family:var(--font-family);transition:all var(--transition-fast);border:none;font-size:.875rem;font-weight:500;line-height:1.25}.btn-danger:hover{box-shadow:var(--shadow-sm);background-color:#b91c1c}.btn-danger:active{transform:scale(.98)}.confirm-message{color:var(--text-secondary);margin:0;font-size:.875rem;line-height:1.5}#app ::-webkit-scrollbar{width:8px;height:8px}#app ::-webkit-scrollbar-track{background:var(--bg-secondary)}#app ::-webkit-scrollbar-thumb{background:var(--border-secondary);border-radius:var(--radius-sm)}#app ::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary)}.hidden{display:none}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}[data-theme=light]{--color-primary:#2c5282;--color-primary-hover:#1a365d;--color-primary-light:#bee3f8;--color-secondary:#4a5568;--color-success:#2f855a;--color-danger:#c53030;--color-danger-light:#fed7d7;--color-warning:#d69e2e;--bg-primary:#fff;--bg-secondary:#f7fafc;--bg-tertiary:#edf2f7;--bg-hover:#e2e8f0;--text-primary:#1a202c;--text-secondary:#2d3748;--text-tertiary:#718096;--text-inverse:#fff;--border-primary:#cbd5e0;--border-secondary:#a0aec0;--border-focus:var(--color-primary);--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a;--pattern-rule-color:#e2e8f0;--pattern-grid-color:#e2e8f0}[data-theme=dark]{--color-primary:#60a5fa;--color-primary-hover:#3b82f6;--color-primary-light:#1e3a8a;--color-secondary:#94a3b8;--color-success:#34d399;--color-danger:#f87171;--color-danger-light:#45222a;--color-warning:#fbbf24;--bg-primary:#1e293b;--bg-secondary:#0f172a;--bg-tertiary:#334155;--bg-hover:#334155;--text-primary:#f1f5f9;--text-secondary:#cbd5e1;--text-tertiary:#64748b;--text-inverse:#0f172a;--border-primary:#334155;--border-secondary:#475569;--border-focus:var(--color-primary);--shadow-sm:0 1px 2px 0 #00000080;--shadow-md:0 4px 6px -1px #00000080, 0 2px 4px -2px #00000080;--shadow-lg:0 10px 15px -3px #00000080, 0 4px 6px -4px #00000080;--pattern-rule-color:#334155;--pattern-grid-color:#334155}.mode-container{width:100%;height:100%;overflow:auto}.overview-container{padding:var(--spacing-xl);max-width:1200px;margin:0 auto}.overview-header{margin-bottom:var(--spacing-xl);justify-content:space-between;align-items:center;display:flex}.overview-header h2{color:var(--text-primary);margin:0;font-size:2rem;font-weight:700}.notebooks-section,.quick-notes-section{margin-bottom:var(--spacing-2xl)}.notebooks-section h3,.quick-notes-section h3{margin-bottom:var(--spacing-md);color:var(--text-primary);font-size:1.25rem;font-weight:600}.notebooks-grid{gap:var(--spacing-md);grid-template-columns:repeat(auto-fill,minmax(280px,1fr));display:grid}.quick-notes-list,.notes-grid{grid-template-columns:repeat(auto-fill, minmax(var(--card-min-width,280px), 1fr));gap:var(--spacing-md);display:grid}.overview-container.card-size-small{--card-min-width:180px}.overview-container.card-size-medium{--card-min-width:280px}.overview-container.card-size-large{--card-min-width:380px}.section-header{margin-bottom:var(--spacing-md);justify-content:space-between;align-items:center;display:flex}.notebook-back-group{align-items:center;gap:var(--spacing-sm);min-width:0;display:flex}.notebook-back-btn{padding:var(--spacing-xs);color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;transition:background-color .15s,color .15s;display:flex}.notebook-back-btn:hover{background-color:var(--bg-hover);color:var(--text-primary)}.notebook-back-title{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.tasks-section{margin-bottom:var(--spacing-2xl)}.tasks-section h3{margin-bottom:var(--spacing-md);color:var(--text-primary);align-items:center;gap:var(--spacing-sm);font-size:1.25rem;font-weight:600;display:flex}.tasks-section__header .tasks-count{color:var(--text-secondary);margin-left:var(--spacing-sm);font-size:.875rem;font-weight:400}.tasks-list,.tasks-done-list{gap:var(--spacing-xs);flex-direction:column;display:flex}.task-item{background-color:var(--bg-primary);align-items:center;gap:var(--spacing-sx);padding:var(--spacing-sm) var(--spacing-md);border:1px solid var(--border-primary);border-radius:var(--radius-md);cursor:pointer;transition:background-color .15s;display:flex;overflow:hidden}.task-item:hover{background-color:var(--bg-tertiary)}.task-item--done{opacity:.6}.task-item--done .task-item__label{text-decoration:line-through}.task-item__checkbox{color:var(--color-primary,#3b82f6);flex-shrink:0;align-items:center;display:flex}.task-item__label{color:var(--text-primary);padding-left:var(--spacing-sm);text-overflow:ellipsis;white-space:nowrap;flex:1;font-size:.9rem;overflow:hidden}.task-item__strokes{height:36px;margin-left:var(--spacing-sm);flex:1 0}.task-item__note{color:var(--text-secondary);text-overflow:ellipsis;white-space:nowrap;flex-shrink:0;max-width:200px;margin-left:auto;font-size:.8rem;overflow:hidden}:is(body,#app) .tasks-display-toggle{color:var(--text-secondary);margin-left:auto;padding:2px 6px}.tasks-display-toggle:hover{color:var(--text-primary)}:is(body,#app) .tasks-done-toggle{margin-top:var(--spacing-sm);padding:var(--spacing-xs) var(--spacing-sm);color:var(--text-secondary);cursor:pointer;background:0 0;border:none;font-family:inherit;font-size:.875rem}.tasks-done-toggle:hover{color:var(--text-primary)}:is(body,#app) .card-options-btn{top:var(--spacing-sm);right:var(--spacing-sm);background-color:var(--bg-primary);border:1px solid var(--border-primary);border-radius:var(--radius-md);cursor:pointer;opacity:.6;width:32px;height:32px;transition:all var(--transition-fast);z-index:10;color:var(--text-secondary);justify-content:center;align-items:center;display:flex;position:absolute}.card-options-btn:hover{background-color:var(--bg-tertiary);color:var(--text-primary);border-color:var(--border-secondary);box-shadow:var(--shadow-sm)}.notebook-card:hover .card-options-btn,.note-card:hover .card-options-btn{opacity:1}.note-options-menu{z-index:2000;background-color:var(--bg-primary);border:1px solid var(--border-primary);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);min-width:160px;position:fixed;overflow:hidden}:is(body,#app) .note-options-menu__item{text-align:left;cursor:pointer;width:100%;font-size:.875rem;font-family:var(--font-family);color:var(--text-primary);background:0 0;border:none;padding:8px 16px;display:block}.note-options-menu__item:hover{background-color:var(--bg-secondary)}:is(body,#app) .note-options-menu__item--danger{color:var(--color-danger)}.note-options-menu__separator{border:none;border-top:1px solid var(--border-primary);margin:0}.action-toggle{border:1px solid var(--border-primary);border-radius:var(--radius-md);margin-bottom:var(--spacing-md);display:flex;overflow:hidden}.action-toggle input[type=radio]{display:none}.action-toggle label{text-align:center;cursor:pointer;color:var(--text-secondary);transition:all var(--transition-fast);flex:1;padding:6px 16px;font-size:.875rem}.action-toggle input[type=radio]:checked+label{background-color:var(--color-primary);color:#fff}.notebook-picker{flex-direction:column;gap:6px;max-height:300px;display:flex;overflow-y:auto}.notebook-picker-item{border-radius:var(--radius-md);cursor:pointer;background-color:var(--bg-secondary);transition:all var(--transition-fast);border:2px solid #0000;align-items:center;gap:10px;padding:8px 12px;display:flex}.notebook-picker-item:hover:not(.current){border-color:var(--border-secondary)}.notebook-picker-item.selected{border-color:var(--color-primary);background-color:var(--bg-tertiary)}.notebook-picker-item.current{opacity:.45;cursor:default}.notebook-picker-item__color{border-radius:2px;flex-shrink:0;width:4px;height:20px}.notebook-picker-item__title{color:var(--text-primary);flex:1;font-size:.875rem;font-weight:500}.notebook-picker-item__badge{color:var(--text-secondary);font-size:.75rem}.notebook-card{background-color:var(--bg-secondary);border:1px solid var(--border-primary);border-radius:var(--radius-md);padding:var(--spacing-lg);cursor:pointer;transition:all var(--transition-fast);flex-direction:column;display:flex;position:relative}.notebook-card:hover{border-color:var(--border-secondary);background-color:var(--bg-tertiary);box-shadow:var(--shadow-md);transform:translateY(-2px)}.notebook-card-header{align-items:center;gap:var(--spacing-sm);margin-bottom:var(--spacing-sm);display:flex}.notebook-color-indicator{border-radius:var(--radius-sm);flex-shrink:0;width:4px;height:24px}.notebook-card-title{color:var(--text-primary);text-overflow:ellipsis;white-space:nowrap;margin:0;font-size:1.125rem;font-weight:600;overflow:hidden}.notebook-card-description{color:var(--text-secondary);flex:1;margin:0;font-size:.875rem;line-height:1.5}.notebook-card-footer{color:var(--text-tertiary);padding-top:var(--spacing-sm);border-top:1px solid var(--border-primary);margin-top:var(--spacing-md);margin-bottom:var(--spacing-sm);justify-content:space-between;align-items:center;font-size:.75rem;display:flex}.notebook-card-count{font-weight:500}:is(body,#app) 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var(--border-primary);background:var(--bg-primary);width:100%;color:var(--text-primary);border-radius:6px;padding:8px 32px 8px 12px}:is(body,#app) .overview-search-clear{cursor:pointer;color:var(--text-secondary);z-index:10;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;width:24px;height:24px;padding:4px;line-height:0;display:none;position:absolute;top:50%;right:8px;transform:translateY(-50%)}.overview-search-clear:hover{background-color:var(--bg-secondary)}.overview-search-results{border:1px solid var(--border-primary);background:var(--bg-primary);border-radius:6px;max-height:calc(100vh - 300px);margin-top:8px;display:none;overflow-y:auto;box-shadow:0 2px 8px #0000001a}.search-result-item{border-bottom:1px solid var(--border-primary);cursor:pointer;padding:10px 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