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var(--transition),border-color var(--transition),color var(--transition);white-space:nowrap}.tb-btn:hover{border-color:var(--line);background:var(--panel);color:var(--text)}.tb-sep{width:1px;height:14px;background:var(--line);margin:0 3px;flex-shrink:0}#editor,.cm-editor{min-height:0;height:100%}.cm-editor{background:var(--panel);color:var(--text);font-size:14px}.cm-scroller{font-family:Cascadia Code,Consolas,monospace}.cm-gutters{background:var(--panel-soft);color:var(--muted);border-right:1px solid var(--line)}[data-theme=dark] .cm-gutters,[data-theme=dark] .cm-activeLineGutter{background:#101820;color:#8ea0af;border-right-color:#2d3f50}.cm-activeLine,.cm-activeLineGutter{background:color-mix(in srgb,var(--accent) 7%,transparent)}.preview-content{min-width:0;overflow:auto;padding:24px 30px 56px}#frontmatter-preview{display:flex;min-width:0;justify-content:flex-end;gap:6px;overflow:hidden}#frontmatter-preview 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