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16px)}.editor-split.editor>.editor-pane,.editor-split.preview>.right-panel-wrapper{flex:1}.editor-split.editor>.right-panel-wrapper,.editor-split.preview>.editor-pane{display:none}.splitter-handle{flex:0 0 4px;cursor:col-resize;background:transparent;position:relative;z-index:2;transition:background-color .2s ease}.splitter-handle:before{content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:2px;height:32px;background:repeating-linear-gradient(to bottom,rgba(0,0,0,.2) 0px,rgba(0,0,0,.2) 2px,transparent 2px,transparent 6px);border-radius:1px;opacity:.6;transition:opacity .2s ease}.splitter-handle:focus-visible{outline:2px solid var(--primary-color, #0078d4);outline-offset:-2px;background-color:#0078d41a}.splitter-handle:hover:before{opacity:1}.splitter-handle:hover{background-color:#00000008}.dark-theme .splitter-handle:before{background:repeating-linear-gradient(to bottom,rgba(255,255,255,.3) 0px,rgba(255,255,255,.3) 2px,transparent 2px,transparent 6px)}.dark-theme .splitter-handle:hover{background-color:#ffffff0d}body.resizing-horizontal,body.resizing-horizontal *{cursor:col-resize!important}.empty-state{display:flex;flex-direction:column;height:100%;overflow:hidden;padding:0;text-align:left;max-height:100%!important}.user-manual-container{flex:1;overflow:hidden;max-height:100%;height:100%;display:flex;flex-direction:column;padding:0 0 0 40px}.user-manual-content{flex:1;overflow-y:auto;overflow-x:hidden;max-height:100%;height:100%}.empty-state h2{font-size:28px;margin-bottom:10px}.empty-state p{font-size:16px;color:var(--color-neutral-foreground2);margin-bottom:20px}.action-button{padding:10px 24px;background-color:#0078d4;color:#fff;border:none;border-radius:4px;font-size:14px;font-weight:500;cursor:pointer;transition:background-color .2s ease}.action-button:hover{background-color:#005a9e}.action-button:active{background-color:#003a70}:root{--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif}:root.light-theme{--surface-color: #ffffff;--header-color: #f8f9fa;--card-background: #ffffff;--input-background: #ffffff;--button-background: #f8f9fa;--hover-background: #e9ecef;--text-color: #212529;--text-secondary: #6c757d;--border-color: #dee2e6;--primary-color: #0066cc;--highlight-background: #fff3cd;--highlight-text: #856404;--tag-background: #e3f2fd}:root.dark-theme{--surface-color: #1e1e1e;--header-color: #2d2d2d;--card-background: #252526;--input-background: #3c3c3c;--button-background: #3c3c3c;--hover-background: #4a4a4a;--text-color: #cccccc;--text-secondary: #969696;--border-color: #464647;--primary-color: #007acc;--highlight-background: #264f78;--highlight-text: #ffffff;--tag-background: #1e3a5f}:root.high-contrast{--surface-color: #000000;--header-color: #000000;--card-background: #000000;--input-background: #000000;--button-background: #000000;--hover-background: #333333;--text-color: #ffffff;--text-secondary: #cccccc;--border-color: #ffffff;--primary-color: #00ffff;--highlight-background: #ffff00;--highlight-text: #000000;--tag-background: #003366}.ribbon-menu button:disabled{opacity:.4;cursor:not-allowed}.ribbon-menu button:disabled:hover{background:var(--button-background)!important;transform:none!important}.context-hint{font-size:.8rem;color:var(--text-secondary);font-style:italic;margin-top:.5rem}.zen-mode .app{padding:0!important}.zen-mode .ribbon-menu,.zen-mode .file-tabs,.zen-mode .writing-stats-wrapper{display:none!important}.zen-mode .editor-scroll-container{padding:0!important;margin:0!important}.zen-mode .editor-container,.zen-mode .editor-split,.zen-mode .editor-pane,.zen-mode .preview-pane,.zen-mode .cm-editor{margin:0!important;padding:0!important}.zen-exit-button{position:fixed;bottom:20px;right:20px;display:flex;align-items:center;gap:8px;padding:12px 16px;background:#000c;color:#fff;border:1px solid rgba(255,255,255,.2);border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;z-index:9999;transition:all .2s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 4px 12px #0000004d}.zen-exit-button:hover{background:#000000e6;border-color:#ffffff4d;transform:translateY(-1px);box-shadow:0 6px 16px #0006}.zen-exit-button:active{transform:translateY(0);box-shadow:0 2px 8px #0000004d}.zen-exit-button svg{flex-shrink:0}.light-theme .zen-exit-button{background:#ffffffe6;color:#333;border-color:#0003}.light-theme .zen-exit-button:hover{background:#fffffff2;border-color:#0000004d}.preview-pane{background:var(--color-neutral-background1);color:var(--color-neutral-foreground1);transition:background .3s ease,color .3s ease}.dark-theme .preview-pane{background:#1e1e1e;border-left:1px solid #333}.light-theme .preview-pane{background:#fff;border-left:1px solid #eee}.focus-mode-active .cm-content>*{opacity:.15!important;transition:opacity .4s cubic-bezier(.4,0,.2,1)!important;filter:blur(1px)}.focus-mode-active .cm-content .cm-activeBlock{opacity:1!important;filter:none!important;transition:opacity .2s ease-out!important;background-color:#0078d41a!important;border-left:3px solid var(--color-brand-foreground1, #0078d4)!important;margin-left:-3px}