trilium/dist/browser/index-editor.css

.ck-mermaid__wrapper{display:flex;justify-content:center}.ck-mermaid__wrapper .ck-mermaid__editing-view{background-color:hsla(0,0%,78%,.3);border:0;font-size:12px;min-height:200px;outline:0;padding:16px;resize:vertical}.ck-mermaid__preview,[id^=dmermaid-]{display:flex;justify-content:center}[id^=dmermaid-]{align-items:center;height:100%}[id^=dmermaid-] svg{display:block;height:auto;width:60%}.ck-mermaid__source-mode .ck-mermaid__editing-view{width:100%}.ck-mermaid__source-mode .ck-mermaid__preview{display:none}.ck-mermaid__split-mode .ck-mermaid__editing-view,.ck-mermaid__split-mode .ck-mermaid__preview{width:50%}.ck-mermaid__preview-mode .ck-mermaid__editing-view{display:none}