src/theme/CodeBlock/Line/styles.module.css

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

/* Intentionally has zero specificity, so that to be able to override
the background in custom CSS file due bug https://github.com/facebook/docusaurus/issues/3678 */
:where(:root) {
  --docusaurus-highlighted-code-line-bg: rgb(72 77 91);
}

:where([data-theme='dark']) {
  --docusaurus-highlighted-code-line-bg: rgb(100 100 100);
}

:global(.theme-code-block-highlighted-line) {
  background-color: var(--docusaurus-highlighted-code-line-bg);
  display: block;
  margin: 0 calc(-1 * var(--ifm-pre-padding));
  padding: 0 var(--ifm-pre-padding);
}

.codeLine {
  display: table-row;
  counter-increment: line-count;
}

.codeLineNumber {
  display: table-cell;
  text-align: right;
  width: 1%;
  position: sticky;
  left: 0;
  padding: 0 var(--ifm-pre-padding);
  background: var(--ifm-pre-background);
  overflow-wrap: normal;
}

.codeLineNumber::before {
  content: counter(line-count);
  opacity: 0.4;
}

:global(.theme-code-block-highlighted-line) .codeLineNumber::before {
  opacity: 0.8;
}

.codeLineContent {
  padding-right: var(--ifm-pre-padding);
}