:root{--bg-app:#fff;--bg-workspace:#f3f4f6;--bg-surface:#fff;--bg-surface-hover:#f9fafb;--bg-surface-active:#f3f4f6;--bg-muted:#f4f4f5;--text-primary:#09090b;--text-secondary:#52525b;--text-muted:#71717a;--text-inverse:#fff;--primary:#18181b;--primary-hover:#27272a;--primary-text:#fff;--accent-blue:#2563eb;--accent-blue-hover:#1d4ed8;--accent-blue-subtle:#eff6ff;--accent-red:#dc2626;--accent-red-hover:#b91c1c;--accent-red-subtle:#fef2f2;--accent-emerald:#10b981;--accent-purple:#8b5cf6;--accent-amber:#f59e0b;--border-subtle:#e4e4e7;--border-strong:#d4d4d8;--border-focus:#18181b;--shadow-xs:0 1px 2px #0000000a;--shadow-sm:0 1px 3px #00000014, 0 1px 2px #0000000a;--shadow-md:0 4px 6px -1px #00000014, 0 2px 4px -2px #0000000a;--shadow-lg:0 10px 15px -3px #00000014, 0 4px 6px -4px #00000008;--shadow-pdf:0 4px 20px #0000001f, 0 1px 4px #0000000f;--radius-sm:4px;--radius-md:6px;--radius-lg:10px;--radius-xl:14px;--radius-full:9999px;--topbar-height:52px;--toolbar-height:48px;--sidebar-width:220px;--bottombar-height:48px;--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace}[data-theme=dark]{--bg-app:#0e0f12;--bg-workspace:#14151b;--bg-surface:#1a1b24;--bg-surface-hover:#232532;--bg-surface-active:#2b2d3d;--bg-muted:#1e202a;--text-primary:#f4f4f6;--text-secondary:#a1a1aa;--text-muted:#71717a;--text-inverse:#0e0f12;--primary:#f4f4f6;--primary-hover:#e4e4e7;--primary-text:#0e0f12;--accent-blue:#3b82f6;--accent-blue-hover:#2563eb;--accent-blue-subtle:#3b82f626;--accent-red:#ef4444;--accent-red-hover:#dc2626;--accent-red-subtle:#ef444426;--accent-emerald:#10b981;--accent-purple:#a855f7;--accent-amber:#f59e0b;--border-subtle:#272836;--border-strong:#383a4c;--border-focus:#3b82f6;--shadow-xs:0 1px 2px #0006;--shadow-sm:0 2px 4px #00000080;--shadow-md:0 4px 12px #0009;--shadow-lg:0 12px 28px #000000b3;--shadow-pdf:0 8px 32px #000c, 0 2px 8px #0009}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{width:100%;height:100%;font-family:var(--font-sans);color:var(--text-primary);background-color:var(--bg-app);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow:hidden}button{cursor:pointer;color:var(--text-primary);-webkit-user-select:none;user-select:none;background:0 0;border:none;justify-content:center;align-items:center;font-family:inherit;font-size:13px;transition:background-color .15s,color .15s,border-color .15s;display:inline-flex}button:disabled{opacity:.4;cursor:not-allowed!important}input,select,textarea{color:var(--text-primary);font-family:inherit;font-size:13px}.app-shell{flex-direction:column;width:100vw;height:100vh;display:flex;overflow:hidden}.topbar{height:var(--topbar-height);border-bottom:1px solid var(--border-subtle);background:var(--bg-surface);z-index:20;justify-content:space-between;align-items:center;padding:0 16px;display:flex}.topbar-left{align-items:center;gap:16px;display:flex}.brand{letter-spacing:-.2px;color:var(--text-primary);align-items:center;gap:10px;font-size:15px;font-weight:600;display:flex}.brand-icon{background:var(--primary);width:28px;height:28px;color:var(--text-inverse);border-radius:var(--radius-md);justify-content:center;align-items:center;font-size:15px;font-weight:700;display:flex}.document-title-badge{background:var(--bg-muted);border-radius:var(--radius-md);color:var(--text-secondary);white-space:nowrap;text-overflow:ellipsis;align-items:center;gap:8px;max-width:260px;padding:4px 10px;font-size:12px;display:flex;overflow:hidden}.unsaved-dot{background:var(--accent-blue);border-radius:50%;width:6px;height:6px;display:inline-block}.topbar-center{align-items:center;gap:6px;display:flex}.topbar-right{align-items:center;gap:10px;display:flex}.icon-btn{border-radius:var(--radius-md);width:32px;height:32px;color:var(--text-secondary)}.icon-btn:hover:not(:disabled){background:var(--bg-surface-hover);color:var(--text-primary)}.icon-btn:active:not(:disabled){background:var(--bg-surface-active)}.btn-primary{background:var(--primary);color:var(--primary-text);border-radius:var(--radius-md);height:32px;box-shadow:var(--shadow-xs);gap:6px;padding:0 14px;font-weight:500}.btn-primary:hover:not(:disabled){background:var(--primary-hover)}.btn-secondary{background:var(--bg-surface);border:1px solid var(--border-subtle);color:var(--text-primary);border-radius:var(--radius-md);gap:6px;height:32px;padding:0 12px;font-weight:500}.btn-secondary:hover:not(:disabled){background:var(--bg-surface-hover);border-color:var(--border-strong)}.btn-danger{background:var(--accent-red-subtle);color:var(--accent-red);border-radius:var(--radius-md);border:1px solid #0000;height:32px;padding:0 12px;font-weight:500}.btn-danger:hover:not(:disabled){background:var(--accent-red);color:#fff}.v-divider{background:var(--border-subtle);width:1px;height:20px;margin:0 4px}.main-container{flex:1;display:flex;position:relative;overflow:hidden}.page-sidebar{width:var(--sidebar-width);border-right:1px solid var(--border-subtle);background:var(--bg-surface);-webkit-user-select:none;user-select:none;z-index:10;flex-direction:column;transition:width .2s;display:flex}.page-sidebar.collapsed{border-right:none;width:0;overflow:hidden}.sidebar-header{border-bottom:1px solid var(--border-subtle);color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;justify-content:space-between;align-items:center;padding:12px 14px;font-size:12px;font-weight:600;display:flex}.sidebar-content{flex-direction:column;flex:1;gap:14px;padding:14px 12px;display:flex;overflow-y:auto}.thumbnail-item-wrapper{flex-direction:column;align-items:center;gap:6px;display:flex;position:relative}.thumbnail-drop-indicator{background:var(--accent-blue);border-radius:var(--radius-full);z-index:5;height:3px;position:absolute;top:-8px;left:0;right:0}.thumbnail-card{border-radius:var(--radius-md);background:var(--bg-surface);cursor:grab;border:2px solid #0000;flex-direction:column;align-items:center;width:100%;padding:6px;transition:border-color .15s,box-shadow .15s;display:flex;position:relative}.thumbnail-card:hover{background:var(--bg-surface-hover)}.thumbnail-card.active{border-color:var(--primary);background:var(--bg-surface-active)}.thumbnail-preview-box{width:140px;height:180px;box-shadow:var(--shadow-sm);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);background:#fff;justify-content:center;align-items:center;display:flex;position:relative;overflow:hidden}.thumbnail-preview-box canvas{object-fit:contain;max-width:100%;max-height:100%}.thumbnail-info{width:100%;color:var(--text-secondary);justify-content:space-between;align-items:center;padding:2px 4px 0;font-size:11px;font-weight:500;display:flex}.thumbnail-quick-actions{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);border:1px solid var(--border-subtle);border-radius:var(--radius-md);box-shadow:var(--shadow-md);z-index:4;background:#fffffff2;gap:2px;padding:2px;display:none;position:absolute;top:10px;right:10px}.thumbnail-card:hover .thumbnail-quick-actions{display:flex}.quick-action-btn{border-radius:var(--radius-sm);width:24px;height:24px;color:var(--text-secondary)}.quick-action-btn:hover{background:var(--bg-muted);color:var(--text-primary)}.quick-action-btn.delete-btn:hover{background:var(--accent-red-subtle);color:var(--accent-red)}.sidebar-footer{border-top:1px solid var(--border-subtle);padding:10px 12px}.add-page-btn{border:1px dashed var(--border-strong);border-radius:var(--radius-md);width:100%;height:34px;color:var(--text-secondary);gap:6px;font-size:12px;font-weight:500}.add-page-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--bg-surface-hover)}.workspace{background:var(--bg-workspace);flex-direction:column;flex:1;display:flex;position:relative;overflow:hidden}.toolbar-container{background:var(--bg-surface);border-bottom:1px solid var(--border-subtle);z-index:15;flex-direction:column;display:flex}.editor-toolbar{height:var(--toolbar-height);justify-content:center;align-items:center;gap:4px;padding:0 16px;display:flex;position:relative}.tool-item{border-radius:var(--radius-md);height:34px;color:var(--text-secondary);gap:6px;padding:0 10px;font-weight:500;position:relative}.tool-item:hover:not(:disabled){background:var(--bg-surface-hover);color:var(--text-primary)}.tool-item.active{background:var(--primary);color:var(--primary-text)}.tool-item.danger:hover:not(:disabled){background:var(--accent-red-subtle);color:var(--accent-red)}.shape-menu-popover{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);z-index:50;flex-direction:column;gap:2px;min-width:140px;padding:4px;display:flex;position:absolute;top:calc(100% + 4px);left:0}.shape-menu-item{border-radius:var(--radius-sm);height:32px;color:var(--text-secondary);justify-content:flex-start;gap:8px;padding:0 10px;font-size:13px}.shape-menu-item:hover{background:var(--bg-surface-hover);color:var(--text-primary)}.shape-menu-item.active{background:var(--bg-muted);color:var(--text-primary);font-weight:500}.property-bar{border-top:1px solid var(--border-subtle);background:var(--bg-surface);height:40px;color:var(--text-secondary);justify-content:center;align-items:center;gap:12px;padding:0 16px;font-size:12px;display:flex}.prop-group{align-items:center;gap:6px;display:flex}.prop-label{color:var(--text-muted);font-size:11px;font-weight:500}.prop-select{border:1px solid var(--border-subtle);border-radius:var(--radius-sm);background:var(--bg-surface);outline:none;height:26px;padding:0 6px}.prop-select:focus{border-color:var(--border-focus)}.prop-toggle-btn{border-radius:var(--radius-sm);border:1px solid var(--border-subtle);width:26px;height:26px;color:var(--text-secondary)}.prop-toggle-btn:hover{background:var(--bg-surface-hover)}.prop-toggle-btn.active{background:var(--primary);border-color:var(--primary);color:var(--primary-text)}.color-picker-trigger{width:22px;height:22px;box-shadow:0 0 0 1px var(--border-subtle);cursor:pointer;border:2px solid #fff;border-radius:50%}.palette-popover{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);z-index:50;grid-template-columns:repeat(5,1fr);gap:6px;padding:10px;display:grid;position:absolute;top:calc(100% + 4px)}.palette-swatch{cursor:pointer;border:1px solid #0000001a;border-radius:50%;width:22px;height:22px;transition:transform .1s}.palette-swatch:hover{transform:scale(1.15)}.document-area{flex:1;justify-content:center;align-items:flex-start;padding:40px;display:flex;position:relative;overflow:auto}.document-page-wrapper{box-shadow:var(--shadow-pdf);background:#fff;border-radius:2px;margin:auto;position:relative}.pdf-canvas{display:block}.selection-overlay{-webkit-user-select:none;user-select:none;touch-action:none;width:100%;height:100%;position:absolute;top:0;left:0;overflow:visible}.selection-overlay.tool-draw,.selection-overlay.tool-highlight,.selection-overlay.tool-shape{cursor:crosshair}.selection-overlay.tool-text{cursor:text}.selection-overlay.tool-select{cursor:default}.selection-box{border:1.5px solid var(--accent-blue);pointer-events:none;box-sizing:border-box;position:absolute}.resize-handle{border:1.5px solid var(--accent-blue);pointer-events:auto;background:#fff;border-radius:1px;width:8px;height:8px;position:absolute}.resize-handle:after{content:"";cursor:inherit;position:absolute;inset:-10px}.resize-handle.handle-nw{cursor:nwse-resize;top:-5px;left:-5px}.resize-handle.handle-n{cursor:ns-resize;top:-5px;left:calc(50% - 4px)}.resize-handle.handle-ne{cursor:nesw-resize;top:-5px;right:-5px}.resize-handle.handle-e{cursor:ew-resize;top:calc(50% - 4px);right:-5px}.resize-handle.handle-se{cursor:nwse-resize;bottom:-5px;right:-5px}.resize-handle.handle-s{cursor:ns-resize;bottom:-5px;left:calc(50% - 4px)}.resize-handle.handle-sw{cursor:nesw-resize;bottom:-5px;left:-5px}.resize-handle.handle-w{cursor:ew-resize;top:calc(50% - 4px);left:-5px}.selection-actions-bar{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);box-shadow:var(--shadow-md);pointer-events:auto;gap:4px;padding:2px;display:flex;position:absolute;top:-34px;left:0}.selection-action-btn{width:24px;height:24px;color:var(--text-secondary);border-radius:2px}.selection-action-btn:hover{background:var(--bg-muted);color:var(--text-primary)}.selection-action-btn.delete:hover{background:var(--accent-red-subtle);color:var(--accent-red)}.inline-text-editor{outline:1px dashed var(--accent-blue);resize:none;white-space:pre-wrap;word-break:break-word;background:0 0;border:none;margin:0;padding:0;position:absolute;overflow:hidden}.inline-text-editor:focus{outline:1.5px solid var(--accent-blue)}.empty-state-container{text-align:center;flex-direction:column;justify-content:center;align-items:center;max-width:440px;margin:auto;padding:48px 24px;display:flex}.empty-state-icon{background:var(--bg-muted);border-radius:var(--radius-lg);width:64px;height:64px;color:var(--text-secondary);border:1px solid var(--border-subtle);justify-content:center;align-items:center;margin-bottom:20px;display:flex}.empty-state-title{color:var(--text-primary);letter-spacing:-.3px;margin-bottom:8px;font-size:20px;font-weight:600}.empty-state-desc{color:var(--text-secondary);margin-bottom:24px;font-size:14px;line-height:1.5}.empty-state-actions{flex-direction:column;align-items:center;gap:12px;width:100%;display:flex}.upload-primary-btn{background:var(--primary);color:var(--primary-text);border-radius:var(--radius-md);height:42px;box-shadow:var(--shadow-sm);gap:8px;width:200px;padding:0 24px;font-size:14px;font-weight:500}.upload-primary-btn:hover{background:var(--primary-hover)}.empty-state-hint{color:var(--text-muted);font-size:12px}.privacy-badge{color:var(--text-muted);align-items:center;gap:6px;margin-top:24px;font-size:11px;display:flex}.drag-over-overlay{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);border:2px dashed var(--primary);border-radius:var(--radius-lg);z-index:100;pointer-events:none;background:#18181b0d;flex-direction:column;justify-content:center;align-items:center;gap:12px;display:flex;position:absolute;inset:16px}.drag-over-title{color:var(--text-primary);font-size:18px;font-weight:600}.bottombar{background:var(--bg-surface);background:color-mix(in srgb, var(--bg-surface) 88%, transparent);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border-subtle);border-radius:var(--radius-full);box-shadow:var(--shadow-lg), 0 0 0 1px #ffffff0d;z-index:30;align-items:center;gap:12px;padding:6px 14px;font-size:13px;transition:all .2s cubic-bezier(.16,1,.3,1);display:flex;position:absolute;bottom:18px;left:50%;transform:translate(-50%)}.bottombar:hover{box-shadow:0 14px 30px -4px #00000026,0 0 0 1px #ffffff1a}.page-controls,.zoom-controls{align-items:center;gap:4px;display:flex}.page-indicator-text{color:var(--text-secondary);-webkit-user-select:none;user-select:none;padding:0 6px;font-size:12px;font-weight:500}.zoom-indicator-text{color:var(--text-secondary);text-align:center;-webkit-user-select:none;user-select:none;min-width:44px;font-size:12px;font-weight:500}.modal-backdrop{-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);z-index:1000;background:#00000073;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-dialog{background:var(--bg-surface);border-radius:var(--radius-lg);border:1px solid var(--border-subtle);box-shadow:var(--shadow-lg);width:100%;max-width:440px;overflow:hidden}.modal-header{border-bottom:1px solid var(--border-subtle);justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.modal-title{color:var(--text-primary);font-size:16px;font-weight:600}.modal-body{color:var(--text-secondary);flex-direction:column;gap:14px;padding:20px;font-size:13px;line-height:1.5;display:flex}.modal-footer{background:var(--bg-muted);border-top:1px solid var(--border-subtle);justify-content:flex-end;align-items:center;gap:8px;padding:12px 20px;display:flex}.form-group{flex-direction:column;gap:6px;display:flex}.form-label{color:var(--text-primary);font-size:12px;font-weight:500}.form-input{border:1px solid var(--border-subtle);border-radius:var(--radius-md);outline:none;height:36px;padding:0 10px;font-size:13px}.form-input:focus{border-color:var(--border-focus)}.toast-container{z-index:1100;pointer-events:none;flex-direction:column;gap:8px;display:flex;position:fixed;bottom:24px;right:24px}.toast-message{pointer-events:auto;background:var(--primary);color:var(--primary-text);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);align-items:center;gap:10px;padding:10px 16px;font-size:13px;animation:.2s toastFadeIn;display:flex}.toast-message.error{background:var(--accent-red)}@keyframes toastFadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.spinner{border:2px solid #0000001a;border-top-color:var(--primary);border-radius:50%;width:18px;height:18px;animation:.7s linear infinite spin}.spinner.light{border-color:#fff #fff3 #fff3}@keyframes spin{to{transform:rotate(360deg)}}.floating-toolbar{background:var(--bg-surface);background:color-mix(in srgb, var(--bg-surface) 92%, transparent);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border-subtle);border-radius:var(--radius-full);box-shadow:var(--shadow-md), 0 0 0 1px #0000000a;z-index:100;pointer-events:auto;white-space:nowrap;align-items:center;gap:2px;padding:3px 6px;animation:.15s ease-out floatFadeIn;display:flex;position:absolute;top:-48px;left:50%;transform:translate(-50%)}@keyframes floatFadeIn{0%{opacity:0;transform:translate(-50%,6px)}to{opacity:1;transform:translate(-50%)}}.floating-btn{border-radius:var(--radius-full);height:28px;color:var(--text-secondary);align-items:center;gap:5px;padding:0 8px;font-size:12px;font-weight:500;transition:all .15s;display:inline-flex}.floating-btn:hover{background:var(--bg-muted);color:var(--text-primary)}.floating-btn.danger:hover{background:var(--accent-red-subtle);color:var(--accent-red)}.floating-popover{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);z-index:110;align-items:center;gap:10px;padding:10px 14px;display:flex;position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%)}.sig-tabs{border-bottom:1px solid var(--border-subtle);background:var(--bg-muted);gap:4px;padding:4px 6px 0;display:flex}.sig-tab-btn{color:var(--text-secondary);border-radius:var(--radius-md) var(--radius-md) 0 0;border-bottom:2px solid #0000;padding:8px 16px;font-size:13px;font-weight:500;transition:all .15s}.sig-tab-btn.active{background:var(--bg-surface);color:var(--text-primary);border-bottom-color:var(--primary)}.sig-canvas-container{border:1px dashed var(--border-strong);border-radius:var(--radius-md);touch-action:none;cursor:crosshair;background:#fff;width:100%;height:180px;margin-top:12px;position:relative;overflow:hidden}[data-theme=dark] .sig-canvas-container{background:#1f2029;border-color:#3b3d4d}.sig-baseline{background:var(--border-subtle);pointer-events:none;height:1px;position:absolute;bottom:40px;left:20px;right:20px}.sig-color-palette{align-items:center;gap:8px;display:flex}.sig-color-dot{cursor:pointer;border:2px solid #0000;border-radius:50%;width:20px;height:20px;transition:transform .1s}.sig-color-dot.active{box-shadow:0 0 0 2px var(--primary);transform:scale(1.2)}.sig-font-option{border:1px solid var(--border-subtle);border-radius:var(--radius-md);cursor:pointer;background:var(--bg-surface);justify-content:space-between;align-items:center;width:100%;margin-bottom:8px;padding:12px 16px;transition:all .15s;display:flex}.sig-font-option:hover{border-color:var(--primary);background:var(--bg-surface-hover)}.sig-font-option.selected{border-color:var(--primary);background:var(--bg-surface-active);box-shadow:0 0 0 1px var(--primary)}.stamp-grid{grid-template-columns:repeat(2,1fr);gap:10px;margin-top:12px;display:grid}.stamp-preset-card{border:1px solid var(--border-subtle);border-radius:var(--radius-md);background:var(--bg-surface);cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:4px;padding:14px 16px;transition:all .15s;display:flex}.stamp-preset-card:hover{border-color:var(--primary);box-shadow:var(--shadow-sm);transform:translateY(-1px)}.stamp-badge-preview{text-transform:uppercase;letter-spacing:1px;-webkit-user-select:none;user-select:none;border:2px solid;border-radius:4px;flex-direction:column;justify-content:center;align-items:center;padding:3px 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