_quarto-rules-code-filename.scss

.code-with-filename .code-with-filename-file {
  margin-bottom: 0;
  padding-bottom: 2px;
  padding-top: 2px;
  padding-left: 0.7em;
  border: var(--quarto-border-width) solid var(--quarto-border-color);
  border-radius: var(--quarto-border-radius);
  border-bottom: 0;
  border-bottom-left-radius: 0%;
  border-bottom-right-radius: 0%;
}

.code-with-filename div.sourceCode,
.reveal .code-with-filename div.sourceCode {
  margin-top: 0;
  border-top-left-radius: 0%;
  border-top-right-radius: 0%;
}

.code-with-filename .code-with-filename-file pre {
  margin-bottom: 0;
}

.code-with-filename .code-with-filename-file {
  background-color: rgba(219, 219, 219, 0.8);
}

.quarto-dark .code-with-filename .code-with-filename-file {
  background-color: #555;
}

.code-with-filename .code-with-filename-file strong {
  font-weight: 400;
}