.toolbar{height:var(--toolbar-height);padding:0 var(--space-2);background:var(--color-bg-secondary);border-bottom:var(--border-default);align-items:center;gap:var(--space-1);z-index:var(--z-toolbar);user-select:none;flex-shrink:0;display:flex}.toolbar-section{align-items:center;gap:var(--space-1);display:flex}.toolbar-menus{flex-shrink:0}.toolbar-tools{scrollbar-width:none;flex:1;overflow:auto hidden}.toolbar-tools::-webkit-scrollbar{display:none}.toolbar-right{flex-shrink:0;margin-left:auto}.toolbar-menu-group{position:relative}.toolbar-menu-btn{padding:var(--space-1) var(--space-3);font-size:var(--text-sm);font-weight:var(--weight-medium);color:var(--color-text-secondary);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);font-family:var(--font-sans);background:0 0;border:none}.toolbar-menu-btn:hover,.toolbar-menu-btn.active{background:var(--color-bg-hover);color:var(--color-text-primary)}.toolbar-dropdown{min-width:220px;top:calc(100% + 4px);left:0}.tool-group{align-items:center;gap:1px;display:flex}.toolbar-tool-btn{border-radius:var(--radius-md);cursor:pointer;width:32px;height:32px;transition:all var(--transition-fast);color:var(--color-text-secondary);font-size:var(--text-md);background:0 0;border:none;justify-content:center;align-items:center;display:flex;position:relative}.toolbar-tool-btn:hover{background:var(--color-bg-hover);color:var(--color-text-primary)}.toolbar-tool-btn.active{background:var(--color-accent-subtle);color:var(--color-accent-text);box-shadow:inset 0 0 0 1px var(--color-accent)}.tool-icon{font-size:14px;line-height:1}.zoom-controls{align-items:center;gap:var(--space-1);padding:0 var(--space-1);background:var(--color-bg-tertiary);border-radius:var(--radius-md);height:30px;display:flex}.zoom-label{font-size:var(--text-xs);font-family:var(--font-mono);color:var(--color-text-secondary);text-align:center;min-width:40px}@media (width<=768px){.toolbar-menus{display:none}.toolbar-tool-btn{width:28px;height:28px}}.sidebar{background:var(--color-bg-secondary);border-right:var(--border-default);z-index:var(--z-sidebar);flex-direction:column;flex-shrink:0;animation:.2s forwards slideInLeft;display:flex;overflow:hidden}.sidebar-tabs{border-bottom:var(--border-default);flex-shrink:0;display:flex}.sidebar-tab{justify-content:center;align-items:center;gap:var(--space-1);padding:var(--space-2) var(--space-2);color:var(--color-text-tertiary);font-size:var(--text-xs);font-family:var(--font-sans);font-weight:var(--weight-medium);cursor:pointer;transition:all var(--transition-fast);white-space:nowrap;background:0 0;border:none;border-bottom:2px solid #0000;flex:1;display:flex}.sidebar-tab:hover{color:var(--color-text-secondary);background:var(--color-bg-hover)}.sidebar-tab.active{color:var(--color-accent-text);border-bottom-color:var(--color-accent)}.sidebar-tab-icon{font-size:12px}.sidebar-tab-label{font-size:var(--text-xs)}.sidebar-content{padding:var(--space-2);flex:1;overflow:hidden auto}.thumbnail-list{gap:var(--space-2);flex-direction:column;align-items:center;display:flex}.thumbnail-item{align-items:center;gap:var(--space-1);padding:var(--space-2);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition-fast);background:0 0;border:2px solid #0000;flex-direction:column;width:100%;display:flex}.thumbnail-item:hover{background:var(--color-bg-hover);border-color:var(--color-surface-border)}.thumbnail-item.active{border-color:var(--color-accent);background:var(--color-accent-subtle)}.thumbnail-canvas{border-radius:var(--radius-sm);box-shadow:var(--shadow-sm);background:#fff;max-width:100%}.thumbnail-label{font-size:var(--text-xs);color:var(--color-text-tertiary);font-family:var(--font-mono)}.thumbnail-item.active .thumbnail-label{color:var(--color-accent-text);font-weight:var(--weight-medium)}.sidebar-empty{padding:var(--space-8) var(--space-4);text-align:center;color:var(--color-text-tertiary);flex-direction:column;justify-content:center;align-items:center;display:flex}.sidebar-empty-icon{margin-bottom:var(--space-3);opacity:.5;font-size:2rem}.sidebar-empty p{font-size:var(--text-sm);color:var(--color-text-tertiary)}.sidebar-empty-hint{margin-top:var(--space-1);opacity:.7;font-size:var(--text-xs)!important}.statusbar{height:var(--statusbar-height);padding:0 var(--space-3);background:var(--color-bg-secondary);border-top:var(--border-default);font-size:var(--text-xs);color:var(--color-text-tertiary);z-index:var(--z-toolbar);user-select:none;flex-shrink:0;justify-content:space-between;align-items:center;display:flex}.statusbar-left,.statusbar-center,.statusbar-right{align-items:center;gap:var(--space-2);display:flex}.statusbar-left{flex:1}.statusbar-center{white-space:nowrap;flex:0}.statusbar-right{flex:1;justify-content:flex-end}.statusbar-label{color:var(--color-text-tertiary)}.statusbar-info{color:var(--color-text-secondary)}.statusbar-tool{color:var(--color-text-tertiary)}.statusbar-tool strong{color:var(--color-accent-text);font-weight:var(--weight-medium)}.page-navigation{align-items:center;gap:var(--space-1);display:flex}.page-input{text-align:center;width:36px;font-size:var(--text-xs);font-family:var(--font-mono);background:var(--color-bg-tertiary);border:1px solid var(--color-surface-border);border-radius:var(--radius-sm);color:var(--color-text-primary);outline:none;padding:1px 4px}.page-input:focus{border-color:var(--color-accent)}.status-dot{align-items:center;gap:var(--space-1);display:flex}.dot{border-radius:var(--radius-full);width:6px;height:6px}.dot-purple{background:var(--color-accent)}.dot-blue{background:var(--color-info)}.tabbar{height:var(--tabbar-height);background:var(--color-bg-tertiary);border-bottom:var(--border-default);flex-shrink:0;align-items:stretch;display:flex;overflow:hidden}.tabbar-scroll{scrollbar-width:none;flex:1;align-items:stretch;display:flex;overflow:auto hidden}.tabbar-scroll::-webkit-scrollbar{display:none}.tab{align-items:center;gap:var(--space-2);padding:0 var(--space-3);border-right:1px solid var(--color-surface-border);cursor:pointer;min-width:120px;max-width:200px;transition:all var(--transition-fast);font-size:var(--text-xs);color:var(--color-text-tertiary);background:0 0;flex-shrink:0;display:flex;position:relative}.tab:hover{background:var(--color-bg-hover);color:var(--color-text-secondary)}.tab.active{background:var(--color-bg-secondary);color:var(--color-text-primary);border-bottom:2px solid var(--color-accent)}.tab-icon{flex-shrink:0;font-size:12px}.tab-label{text-overflow:ellipsis;white-space:nowrap;font-weight:var(--weight-medium);flex:1;overflow:hidden}.tab-unsaved{color:var(--color-warning);flex-shrink:0;font-size:8px}.tab-close{width:16px;height:16px;color:var(--color-text-tertiary);border-radius:var(--radius-sm);cursor:pointer;opacity:0;transition:all var(--transition-fast);background:0 0;border:none;flex-shrink:0;justify-content:center;align-items:center;font-size:14px;line-height:1;display:flex}.tab:hover .tab-close{opacity:1}.tab-close:hover{background:var(--color-error-subtle);color:var(--color-error)}.pdf-viewer{background:var(--color-bg-primary);background-image:radial-gradient(var(--color-bg-tertiary) 1px, transparent 1px);background-size:20px 20px;flex-direction:column;flex:1;align-items:center;display:flex;position:relative;overflow:auto}.pdf-pages-container{align-items:center;gap:var(--space-4);padding:var(--space-6);flex-direction:column;min-height:100%;display:flex}.pdf-page-wrapper{box-shadow:var(--shadow-lg);border-radius:var(--radius-sm);transition:box-shadow var(--transition-normal);background:#fff;position:relative;overflow:hidden}.pdf-page-wrapper:hover{box-shadow:var(--shadow-xl)}.pdf-page-canvas{display:block}.pdf-annotation-canvas{z-index:2;position:absolute;top:0;left:0}.pdf-text-layer{z-index:1;opacity:.3;pointer-events:auto;line-height:1;position:absolute;top:0;left:0}.pdf-text-layer span{white-space:pre;transform-origin:0 0;cursor:text;color:#0000;position:absolute}.pdf-text-layer span::selection{background:#6366f14d}.pdf-loading{background:var(--color-bg-overlay);z-index:10;backdrop-filter:blur(4px);justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.pdf-loading-content{align-items:center;gap:var(--space-3);color:var(--color-text-primary);flex-direction:column;display:flex}.pdf-loading-content p{font-size:var(--text-sm);color:var(--color-text-secondary)}.pdf-loading-percent{font-size:var(--text-xs);font-family:var(--font-mono);color:var(--color-accent-text)}.pdf-page-number{bottom:var(--space-2);color:#fff;font-size:var(--text-xs);font-family:var(--font-mono);border-radius:var(--radius-full);pointer-events:none;opacity:0;transition:opacity var(--transition-normal);z-index:5;background:#0009;padding:2px 10px;position:absolute;left:50%;transform:translate(-50%)}.pdf-page-wrapper:hover .pdf-page-number{opacity:1}.search-panel{align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);background:var(--color-bg-secondary);border-bottom:var(--border-default);flex-shrink:0;animation:.15s forwards fadeInDown;display:flex}.search-panel .input{max-width:300px}.search-results-info{font-size:var(--text-xs);color:var(--color-text-tertiary);white-space:nowrap}.dialog-description{font-size:var(--text-sm);color:var(--color-text-secondary);margin-bottom:var(--space-4)}.dialog-info{font-size:var(--text-xs);color:var(--color-text-tertiary)}.file-drop-zone{justify-content:center;align-items:center;gap:var(--space-2);padding:var(--space-6) var(--space-4);border:2px dashed var(--color-surface-border);border-radius:var(--radius-xl);cursor:pointer;transition:all var(--transition-normal);text-align:center;flex-direction:column;display:flex}.file-drop-zone:hover{border-color:var(--color-accent);background:var(--color-accent-subtle)}.file-drop-icon{font-size:2rem}.file-drop-label{font-size:var(--text-sm);font-weight:var(--weight-medium);color:var(--color-text-primary)}.file-drop-hint{font-size:var(--text-xs);color:var(--color-text-tertiary)}.merge-file-list{gap:var(--space-1);margin-top:var(--space-4);flex-direction:column;display:flex}.merge-file-item{align-items:center;gap:var(--space-3);padding:var(--space-2) var(--space-3);background:var(--color-bg-tertiary);border-radius:var(--radius-md);transition:background var(--transition-fast);display:flex}.merge-file-item:hover{background:var(--color-bg-hover)}.merge-file-index{background:var(--color-accent-subtle);width:24px;height:24px;color:var(--color-accent-text);border-radius:var(--radius-full);font-size:var(--text-xs);font-weight:var(--weight-semibold);flex-shrink:0;justify-content:center;align-items:center;display:flex}.merge-file-name{font-size:var(--text-sm);color:var(--color-text-primary);flex:1}.merge-file-actions{gap:2px;display:flex}.split-modes{gap:var(--space-2);flex-direction:column;display:flex}.split-mode-option{align-items:flex-start;gap:var(--space-3);padding:var(--space-3);border:var(--border-default);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition-fast);display:flex}.split-mode-option:hover{border-color:var(--color-accent);background:var(--color-bg-tertiary)}.split-mode-option.active{border-color:var(--color-accent);background:var(--color-accent-subtle)}.split-mode-option input[type=radio]{accent-color:var(--color-accent);margin-top:3px}.split-mode-option div{flex-direction:column;gap:2px;display:flex}.split-mode-option strong{font-size:var(--text-sm);color:var(--color-text-primary)}.split-mode-option span{font-size:var(--text-xs);color:var(--color-text-tertiary)}.split-range-inputs{gap:var(--space-4);margin-top:var(--space-4);display:flex}.input-group{gap:var(--space-1);flex-direction:column;flex:1;display:flex}.input-group label{font-size:var(--text-xs);font-weight:var(--weight-medium);color:var(--color-text-secondary)}.input-group select.input{appearance:none;padding-right:var(--space-8);background-image:url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239ca3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");background-position:right 8px center;background-repeat:no-repeat;background-size:16px}.convert-modes{gap:var(--space-2);display:flex}.convert-mode-btn{align-items:center;gap:var(--space-2);padding:var(--space-4);background:var(--color-bg-tertiary);border:var(--border-default);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition-fast);font-family:var(--font-sans);font-size:var(--text-xs);color:var(--color-text-secondary);flex-direction:column;flex:1;display:flex}.convert-mode-btn:hover:not(:disabled){border-color:var(--color-accent);background:var(--color-bg-hover);color:var(--color-text-primary)}.convert-mode-btn.active{border-color:var(--color-accent);background:var(--color-accent-subtle);color:var(--color-accent-text)}.convert-mode-btn:disabled{opacity:.4;cursor:not-allowed}.compress-info,.compress-results{justify-content:center;align-items:center;gap:var(--space-6);padding:var(--space-6);background:var(--color-bg-tertiary);border-radius:var(--radius-xl);display:flex}.compress-stat{align-items:center;gap:var(--space-1);flex-direction:column;display:flex}.compress-stat-label{font-size:var(--text-xs);color:var(--color-text-tertiary)}.compress-stat-value{font-size:var(--text-lg);font-weight:var(--weight-semibold);color:var(--color-text-primary);font-family:var(--font-mono)}.compress-success{color:var(--color-success)!important}.compress-arrow{font-size:var(--text-xl);color:var(--color-text-tertiary)}.compress-savings{margin-top:var(--space-2)}.page-organizer-grid{gap:var(--space-3);grid-template-columns:repeat(auto-fill,minmax(100px,1fr));display:grid}.page-org-item{align-items:center;gap:var(--space-1);padding:var(--space-2);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition-fast);border:2px solid #0000;flex-direction:column;display:flex}.page-org-item:hover{background:var(--color-bg-hover);border-color:var(--color-surface-border)}.page-org-item.selected{border-color:var(--color-accent);background:var(--color-accent-subtle)}.page-org-preview{border-radius:var(--radius-sm);width:80px;height:110px;box-shadow:var(--shadow-sm);background:#fff;overflow:hidden}.page-org-placeholder{width:100%;height:100%;font-size:var(--text-xl);font-weight:var(--weight-bold);color:#ccc;justify-content:center;align-items:center;display:flex}.page-org-label{font-size:var(--text-xs);color:var(--color-text-tertiary)}.page-org-item.selected .page-org-label{color:var(--color-accent-text)}.app-shell{background:var(--color-bg-primary);flex-direction:column;width:100vw;height:100vh;display:flex;position:relative;overflow:hidden}.app-shell-body{flex:1;display:flex;position:relative;overflow:hidden}.app-shell-content{background:var(--color-bg-primary);flex-direction:column;flex:1;display:flex;position:relative;overflow:hidden}.drag-overlay{border:3px dashed var(--color-accent);z-index:var(--z-modal);backdrop-filter:blur(4px);background:#6366f114;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.drag-overlay-content{text-align:center;color:var(--color-text-primary)}.drag-icon{margin-bottom:var(--space-4);filter:drop-shadow(0 4px 12px #6366f14d);font-size:4rem}.drag-overlay-content h3{font-size:var(--text-xl);margin-bottom:var(--space-2)}.drag-overlay-content p{font-size:var(--text-sm);color:var(--color-text-secondary)}.welcome-screen{padding:var(--space-8);background:radial-gradient(ellipse at center, var(--color-bg-secondary) 0%, var(--color-bg-primary) 70%);flex:1;justify-content:center;align-items:center;display:flex}.welcome-content{text-align:center;width:100%;max-width:600px}.welcome-logo{margin-bottom:var(--space-8)}.welcome-logo-icon{margin-bottom:var(--space-4);filter:drop-shadow(0 0 24px #6366f166);display:inline-flex}.welcome-logo h1{font-size:var(--text-3xl);font-weight:var(--weight-bold);background:linear-gradient(135deg,#6366f1,#8b5cf6,#a78bfa);-webkit-text-fill-color:transparent;margin-bottom:var(--space-2);background-clip:text}.welcome-subtitle{font-size:var(--text-md);color:var(--color-text-secondary)!important}.welcome-open-btn{box-shadow:var(--shadow-glow);padding:var(--space-3) var(--space-8)!important;font-size:var(--text-md)!important;border-radius:var(--radius-xl)!important;gap:var(--space-3)!important;transition:all var(--transition-normal)!important}.welcome-open-btn:hover{transform:translateY(-2px)scale(1.02)!important;box-shadow:0 0 30px #6366f180!important}.welcome-hint{margin-top:var(--space-4);font-size:var(--text-sm);color:var(--color-text-tertiary)!important}.welcome-shortcuts{justify-content:center;align-items:center;gap:var(--space-3);margin-top:var(--space-6);font-size:var(--text-xs);color:var(--color-text-tertiary);display:flex}.shortcut-badge{background:var(--color-bg-tertiary);border:var(--border-default);border-radius:var(--radius-sm);font-family:var(--font-mono);font-size:var(--text-xs);color:var(--color-text-secondary);padding:2px 8px;display:inline-flex}.welcome-features{gap:var(--space-3);margin-top:var(--space-8);grid-template-columns:repeat(3,1fr);display:grid}.welcome-feature{align-items:center;gap:var(--space-1);padding:var(--space-4) var(--space-3);background:var(--color-bg-secondary);border:var(--border-default);border-radius:var(--radius-lg);transition:all var(--transition-normal);cursor:default;flex-direction:column;display:flex}.welcome-feature:hover{border-color:var(--color-accent);background:var(--color-bg-tertiary);box-shadow:var(--shadow-md);transform:translateY(-2px)}.welcome-feature-icon{margin-bottom:var(--space-1);font-size:1.5rem}.welcome-feature-label{font-size:var(--text-sm);font-weight:var(--weight-semibold);color:var(--color-text-primary)}.welcome-feature-desc{font-size:var(--text-xs);color:var(--color-text-tertiary)}.toast{cursor:pointer}.toast-icon{border-radius:var(--radius-full);width:20px;height:20px;font-size:11px;font-weight:var(--weight-bold);flex-shrink:0;justify-content:center;align-items:center;display:flex}.toast-icon-success{background:var(--color-success-subtle);color:var(--color-success)}.toast-icon-error{background:var(--color-error-subtle);color:var(--color-error)}.toast-icon-info{background:var(--color-info-subtle);color:var(--color-info)}.toast-icon-warning{background:var(--color-warning-subtle);color:var(--color-warning)}@media (width<=768px){.welcome-features{grid-template-columns:repeat(2,1fr)}.welcome-shortcuts{display:none}}@media (width<=480px){.welcome-features{grid-template-columns:1fr}}.login-container{background-color:var(--bg-color);min-height:100vh;font-family:var(--font-family);justify-content:center;align-items:center;display:flex}.login-card{background-color:var(--panel-bg);border:1px solid var(--border-color);text-align:center;border-radius:8px;width:100%;max-width:400px;padding:2.5rem;box-shadow:0 10px 25px #0000001a}.login-header .login-logo{width:64px;height:64px;color:var(--primary-color);margin:0 auto 1rem}.login-header h1{color:var(--text-color);margin-bottom:.5rem;font-size:1.5rem}.login-header p{color:var(--text-color-secondary);margin-bottom:2rem;font-size:.9rem}.login-form{flex-direction:column;gap:1rem;display:flex}.pin-input-group input{text-align:center;letter-spacing:.5rem;border:2px solid var(--border-color);background-color:var(--bg-color);width:100%;color:var(--text-color);border-radius:6px;outline:none;padding:1rem;font-size:2rem;transition:border-color .2s}.pin-input-group input:focus{border-color:var(--primary-color)}.pin-input-group input.error{border-color:#ef4444}.error-message{color:#ef4444;text-align:left;font-size:.85rem}.login-button{background-color:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:6px;padding:.875rem;font-size:1rem;font-weight:500;transition:background-color .2s}.login-button:hover{background-color:#2563eb}.login-footer{color:var(--text-color-secondary);margin-top:2rem;font-size:.75rem}:root{--color-bg-primary:#0a0e1a;--color-bg-secondary:#111827;--color-bg-tertiary:#1e2538;--color-bg-elevated:#252d42;--color-bg-hover:#2a3350;--color-bg-active:#323c5a;--color-bg-overlay:#000000a6;--color-surface:#161d2e;--color-surface-hover:#1c2540;--color-surface-active:#242e4a;--color-surface-border:#2a3350;--color-text-primary:#f0f2f8;--color-text-secondary:#9ca3b8;--color-text-tertiary:#6b7280;--color-text-disabled:#4b5563;--color-text-inverse:#0a0e1a;--color-accent:#6366f1;--color-accent-hover:#7c7ff7;--color-accent-active:#5254cc;--color-accent-subtle:#6366f126;--color-accent-text:#a5b4fc;--color-success:#22c55e;--color-success-subtle:#22c55e26;--color-warning:#f59e0b;--color-warning-subtle:#f59e0b26;--color-error:#ef4444;--color-error-subtle:#ef444426;--color-info:#3b82f6;--color-info-subtle:#3b82f626;--color-highlight-yellow:#ffeb3b66;--color-highlight-green:#4caf5066;--color-highlight-pink:#e91e6366;--color-highlight-blue:#2196f366;--color-highlight-orange:#ff980066;--font-sans:"Inter", 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