substance/packages/codeblock/_codeblock.css

Substance is a JavaScript library for web-based content editing. It provides building blocks for realizing custom text editors and web-based publishing systems.

.sc-codeblock {
  font-family: var(--font-family-code);
  font-size: 15px;
}

// Toolbar styles
.sc-switch-text-type .se-option.sm-codeblock {
  font-family: var(--font-family-code);
  font-size: 15px;
}