div.rendered_html code {
    font-family: monospace, monospace;
    font-size: 11pt;
    padding-top: 3px;
    padding-left: 2px;
    color: #c7254e;
    background-color: #f9f2f4;
    border-radius: 2px;
}

div.rendered_html code {
    font-family: monospace, monospace;
    font-size: 90%;
    padding-top: 3px;
    padding-left: 2px;
    color: #c7254e;
    background-color: #f9f2f4;
    border-radius: 2px;
}

Use relative scale for font-size at code block css
:art: Use relative scale for font-size at code block css
