:root{--header-height: 52px;--panel-header-height: 40px;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 10px;--ease: cubic-bezier(.4, 0, .2, 1);--duration: .2s;--a4-w: 210mm;--a4-h: 297mm;--legal-w: 215.9mm;--legal-h: 330.2mm;--page-w: var(--a4-w);--page-h: var(--a4-h) }body.workspace-dark{--bg-app: #0f1115;--bg-panel: #151820;--bg-panel-header: #191d26;--bg-editor: #11141b;--bg-input: #202530;--bg-hover: #8592a31a;--bg-active: #7685962e;--border: #a6b0be24;--border-strong: #b9c2cf3d;--border-focus: #849bb58c;--text-primary: #edf0f4;--text-secondary: #aab2bf;--text-tertiary: #737e8c;--text-accent: #b7c3cf;--accent: #72808f;--accent-hover: #8896a5;--accent-subtle: #7e8ea024;--accent-glow: #5765743d;--grad-accent: #5f6b77;--grad-header: #1a1f29;--grad-page-shadow: none;--selection-bg: rgba(133, 146, 163, .3);--selection-text: #ffffff }body.workspace-light{--bg-app: #f4f5f8;--bg-panel: #fff;--bg-panel-header: #f8f9fa;--bg-editor: #fff;--bg-input: #eaedf1;--bg-hover: #5f6b7714;--bg-active: #5f6b7726;--border: #5f6b7724;--border-strong: #5f6b773d;--border-focus: #5f6b7773;--text-primary: #1e2229;--text-secondary: #5f6775;--text-tertiary: #8e98a8;--text-accent: #444c56;--accent: #5f6b77;--accent-hover: #4d5761;--accent-subtle: #5f6b771a;--accent-glow: #5f6b7733;--grad-accent: #718091;--grad-header: #f8f9fa;--grad-page-shadow: none;--selection-bg: rgba(95, 107, 119, .25);--selection-text: #000000 }body.workspace-slate{--bg-app: #eae4d7;--bg-panel: #f4eee1;--bg-panel-header: #f8f3e8;--bg-editor: #faf6ed;--bg-input: #e2d9c6;--bg-hover: #8f714c14;--bg-active: #8f714c26;--border: #8f714c24;--border-strong: #8f714c3d;--border-focus: #8f714c73;--text-primary: #383023;--text-secondary: #706350;--text-tertiary: #9c8e7a;--text-accent: #8b663b;--accent: #8f714c;--accent-hover: #7b603f;--accent-subtle: #8f714c1a;--accent-glow: #8f714c33;--grad-accent: #8f714c;--grad-header: #f4eee1;--grad-page-shadow: none;--selection-bg: rgba(143, 113, 76, .25);--selection-text: #000000 }::selection,*::selection,textarea::selection,input::selection{background:var(--selection-bg, rgba(0, 120, 215, .3))!important;color:var(--selection-text, #ffffff)!important}.hidden{display:none!important}.workspace-theme-group{display:flex;align-items:center;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);padding:2px;gap:2px}.theme-toggle-btn{background:transparent;border:none;color:var(--text-secondary);width:26px;height:24px;border-radius:4px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--duration) var(--ease)}.theme-toggle-btn:hover{color:var(--text-primary);background:var(--bg-hover)}.theme-toggle-btn.active{background:var(--accent);color:#fff!important}.theme-toggle-btn svg{pointer-events:none}*,:before,:after{margin:0;padding:0;box-sizing:border-box}*{scrollbar-width:thin;scrollbar-color:var(--border) transparent}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px;transition:background var(--duration) var(--ease)}::-webkit-scrollbar-thumb:hover{background:var(--border-strong)}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:Inter,system-ui,-apple-system,sans-serif;background:var(--bg-app);color:var(--text-primary);overflow:hidden;height:100vh;display:flex;flex-direction:column}#app-header{height:var(--header-height);background:var(--grad-header);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 16px;gap:16px;position:relative;z-index:100;flex-shrink:0}.header-left{display:flex;align-items:center;min-width:170px;gap:16px}.logo{display:flex;align-items:center;gap:10px;cursor:default;-webkit-user-select:none;user-select:none}.logo-text{font-family:Playfair Display,serif;font-size:1.2rem;font-weight:700;background:var(--grad-accent);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.02em}.header-center{flex:1;display:flex;justify-content:center;max-width:400px}.book-title-input{font-family:Playfair Display,serif;font-size:1rem;font-weight:600;color:var(--text-primary);background:transparent;border:1px solid transparent;border-radius:var(--radius-sm);padding:4px 12px;width:100%;text-align:center;transition:all var(--duration) var(--ease);outline:none}.book-title-input::placeholder{color:var(--text-tertiary)}.book-title-input:hover{border-color:var(--border);background:var(--bg-input)}.book-title-input:focus{border-color:var(--border-focus);background:var(--bg-input)}.header-right{display:flex;align-items:center;gap:8px;min-width:170px;justify-content:flex-end}.header-divider{width:1px;height:24px;background:var(--border);margin:0 4px}.page-size-selector{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));align-items:center;width:138px;height:30px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);padding:2px;position:relative;gap:0;overflow:hidden}.page-size-btn{font-family:Inter,sans-serif;font-size:.72rem;font-weight:600;color:var(--text-secondary);background:transparent;border:none;width:100%;height:24px;padding:0 8px;border-radius:4px;cursor:pointer;transition:all var(--duration) var(--ease);position:relative;z-index:1;letter-spacing:0;white-space:nowrap;display:flex;align-items:center;justify-content:center}.page-size-btn:hover{color:var(--text-primary)}.page-size-btn.active{color:#fff}.page-size-indicator{position:absolute;top:2px;left:2px;height:calc(100% - 4px);width:calc((100% - 4px)/2);background:var(--accent);border-radius:4px;transition:transform var(--duration) var(--ease);z-index:0}.page-size-selector[data-active=legal] .page-size-indicator{transform:translate(100%)}.icon-btn{display:flex;align-items:center;gap:6px;font-family:Inter,sans-serif;font-size:.78rem;font-weight:500;color:var(--text-secondary);background:transparent;border:1px solid var(--border);border-radius:var(--radius-sm);padding:6px 12px;cursor:pointer;transition:all var(--duration) var(--ease)}.icon-btn:hover{color:var(--text-primary);background:var(--bg-hover);border-color:var(--border-strong)}.icon-btn:active{transform:scale(.97)}.btn-label{line-height:1}#app-main{flex:1;display:flex;overflow:hidden;position:relative}.panel{display:flex;flex-direction:column;overflow:hidden}#editor-panel{width:42%;min-width:280px;border-right:1px solid var(--border);background:var(--bg-panel)}#preview-panel{flex:1;min-width:320px;background:var(--bg-app)}.panel-header{height:var(--panel-header-height);display:flex;align-items:center;justify-content:space-between;padding:0 14px;background:var(--bg-panel-header);border-bottom:1px solid var(--border);flex-shrink:0}.panel-title{display:flex;align-items:center;gap:7px;font-size:.75rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.08em}.panel-actions{display:flex;align-items:center;gap:10px}.panel-action-btn{display:flex;align-items:center;gap:5px;font-family:Inter,sans-serif;font-size:.7rem;font-weight:500;color:var(--text-tertiary);background:transparent;border:1px solid var(--border);border-radius:4px;padding:3px 8px;cursor:pointer;transition:all var(--duration) var(--ease)}.panel-action-btn:hover{color:var(--text-accent);border-color:var(--accent);background:var(--accent-subtle)}.word-count{font-size:.7rem;font-weight:500;color:var(--text-tertiary);font-variant-numeric:tabular-nums;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}.resize-handle{width:6px;cursor:col-resize;background:transparent;position:relative;z-index:10;flex-shrink:0;display:flex;align-items:center;justify-content:center;transition:background var(--duration) var(--ease)}.resize-handle:hover,.resize-handle.dragging{background:var(--accent-subtle)}.resize-dots{display:flex;flex-direction:column;gap:3px}.resize-dots span{width:3px;height:3px;border-radius:50%;background:var(--text-tertiary);transition:background var(--duration) var(--ease)}.resize-handle:hover .resize-dots span,.resize-handle.dragging .resize-dots span{background:var(--accent)}.editor-wrapper{flex:1;position:relative;overflow:hidden}.markdown-editor{width:100%;height:100%;font-family:JetBrains Mono,Fira Code,monospace;font-size:.93rem;line-height:1.85;color:var(--text-primary);background:var(--bg-editor);border:none;outline:none;resize:none;padding:28px 48px 80px 42px;-moz-tab-size:2;tab-size:2;overflow-y:auto;caret-color:#d2dce6e6;letter-spacing:.01em}.markdown-editor::placeholder{color:var(--text-tertiary);opacity:.6}.editor-fade-bottom{position:absolute;bottom:0;left:0;right:8px;height:40px;background:linear-gradient(transparent,var(--bg-editor));pointer-events:none}.preview-wrapper{flex:1;display:flex;overflow:auto;padding:32px;justify-content:center}.preview-canvas-container{display:flex;justify-content:center;align-items:flex-start}.preview-canvas{display:flex;flex-direction:column;align-items:center;gap:32px;flex-shrink:0}.book-page{width:var(--page-w);min-height:var(--page-h);height:var(--page-h);background:var(--book-bg, #fff)!important;border-radius:2px;overflow:hidden;position:relative;flex-shrink:0;transition:width .4s var(--ease),height .4s var(--ease),min-height .4s var(--ease)}.page-inner{padding:var(--book-margin-top, 25mm) var(--book-margin-right, 20mm) var(--book-margin-bottom, 25mm) var(--book-margin-left, 25mm)!important;height:100%;box-sizing:border-box;position:relative;overflow:hidden}.book-page.pn-bottom-center .page-number{position:absolute;bottom:var(--book-margin-bottom, 25mm);left:50%;transform:translate(-50%,150%)}.book-page.pn-bottom-right .page-number{position:absolute;bottom:var(--book-margin-bottom, 25mm);right:var(--book-margin-right, 20mm);transform:translateY(150%)}.book-page.pn-bottom-left .page-number{position:absolute;bottom:var(--book-margin-bottom, 25mm);left:var(--book-margin-left, 25mm);transform:translateY(150%)}.book-page.pn-top-center .page-number{position:absolute;top:var(--book-margin-top, 25mm);left:50%;transform:translate(-50%,-150%)}.book-page.pn-top-right .page-number{position:absolute;top:var(--book-margin-top, 25mm);right:var(--book-margin-right, 20mm);transform:translateY(-150%)}.book-page.pn-top-left .page-number{position:absolute;top:var(--book-margin-top, 25mm);left:var(--book-margin-left, 25mm);transform:translateY(-150%)}.book-page.pn-hidden 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.hljs-emphasis{color:#24292e;font-style:italic}.page-content .hljs-strong{color:#24292e;font-weight:700}.zoom-controls{display:flex;align-items:center;gap:4px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);padding:2px}.zoom-btn{font-family:Inter,sans-serif;font-size:.75rem;font-weight:600;color:var(--text-secondary);background:transparent;border:none;width:24px;height:24px;display:flex;align-items:center;justify-content:center;cursor:pointer;border-radius:3px;transition:all var(--duration) var(--ease)}.zoom-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.zoom-level{font-size:.7rem;font-weight:600;color:var(--text-tertiary);min-width:38px;text-align:center;font-variant-numeric:tabular-nums}.page-indicator{font-size:.68rem;font-weight:500;color:var(--text-tertiary);font-variant-numeric:tabular-nums;margin-left:2px}.nav-controls{display:flex;align-items:center;gap:4px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);padding:2px}.nav-btn{font-family:Inter,sans-serif;font-size:.75rem;font-weight:600;color:var(--text-secondary);background:transparent;border:none;width:26px;height:24px;display:flex;align-items:center;justify-content:center;cursor:pointer;border-radius:3px;transition:all var(--duration) var(--ease)}.nav-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.nav-btn:disabled{opacity:.3;cursor:default;pointer-events:none}.nav-page-display{font-size:.7rem;font-weight:600;color:var(--text-primary);min-width:48px;text-align:center;font-variant-numeric:tabular-nums}.page-total{font-size:.68rem;font-weight:500;color:var(--text-tertiary);font-variant-numeric:tabular-nums;margin-left:2px}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%) translateY(0);font-family:Inter,sans-serif;font-size:.82rem;font-weight:500;color:#fff;background:var(--grad-accent);padding:10px 24px;border-radius:var(--radius-md);z-index:9999;transition:opacity .3s var(--ease),transform .3s var(--ease)}.toast.hidden{opacity:0;transform:translate(-50%) translateY(12px);pointer-events:none}.print-container{position:fixed;left:-10000px;top:0;width:0;height:0;overflow:hidden;visibility:hidden;pointer-events:none}@media print{*{-webkit-print-color-adjust:exact!important;print-color-adjust:exact!important;color-adjust:exact!important}@page{margin:0}body>:not(.print-container){display:none!important}body{background:#fff!important;color:#1a1a2e!important;overflow:visible!important;height:auto!important}.print-container{position:static!important;left:auto!important;top:auto!important;width:auto!important;height:auto!important;overflow:visible!important;visibility:visible!important;pointer-events:auto!important}.print-page,.book-page.print-page{display:block!important;width:var(--page-w)!important;height:var(--page-h)!important;min-height:var(--page-h)!important;opacity:1!important;position:relative!important;pointer-events:auto!important;page-break-after:always;break-after:page;page-break-inside:avoid;break-inside:avoid;background:var(--book-bg, #fff)!important;padding:0!important;margin:0!important;box-sizing:border-box;overflow:hidden;box-shadow:none!important;border-radius:0!important}.print-page:last-child,.book-page.print-page:last-child{page-break-after:auto;break-after:auto}.print-page .page-inner,.book-page.print-page .page-inner{padding:var(--book-margin-top, 25mm) var(--book-margin-right, 20mm) var(--book-margin-bottom, 25mm) var(--book-margin-left, 25mm)!important;height:100%!important;width:100%!important;box-sizing:border-box!important;position:relative!important;overflow:hidden!important;background:transparent!important}.print-page .page-label,.book-page.print-page .page-label{display:none!important}.print-page .page-content,.book-page.print-page .page-content{font-family:var(--book-font-family, "Playfair Display", "Georgia", serif)!important;font-size:var(--book-font-size, 11pt)!important;line-height:var(--book-line-height, 1.35)!important;color:var(--book-text, #202225)!important}.print-page .page-content h1,.book-page.print-page .page-content h1{font-size:24pt;border-bottom:2px solid var(--book-accent)!important;color:var(--book-text, #202225)!important}.print-page .page-content h2,.book-page.print-page .page-content h2{font-size:18pt;color:var(--book-text, inherit)!important}.print-page .page-content h3,.book-page.print-page .page-content h3{font-size:13pt;color:var(--book-text, inherit)!important}.print-page .page-content pre,.book-page.print-page .page-content pre{background:var(--book-code-bg, #f2f1ee)!important;color:var(--book-text, #3a4650)!important;border:1px solid var(--book-border, #e4e0d8)!important}.print-page .page-content pre code,.book-page.print-page .page-content pre code{background:transparent!important}.print-page .page-content th,.book-page.print-page .page-content th{background:var(--book-accent)!important;color:#fff!important;border:1px solid var(--book-accent)!important}.print-page .page-content td,.book-page.print-page .page-content td{border:1px solid 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