shoelace/docs/assets/plugins/code-block/code-block.css

.code-block {
  position: relative;
  border-radius: 3px;
  background-color: var(--sl-color-neutral-50);
  margin-bottom: 1.5rem;
}

.code-block__preview {
  position: relative;
  border: solid 1px var(--sl-color-neutral-200);
  border-bottom: none;
  border-top-left-radius: 3px;
  border-top-right-radius: 3px;
  background-color: var(--sl-color-neutral-0);
  min-width: 20rem;
  max-width: 100%;
  padding: 1.5rem 3.25rem 1.5rem 1.5rem;
}

/* Block the preview while dragging to prevent iframes from intercepting drag events */
.code-block__preview--dragging:after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: ew-resize;
}

.code-block__resizer {
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 1.75rem;
  font-size: 20px;
  color: var(--sl-color-neutral-600);
  background-color: var(--sl-color-neutral-0);
  border-left: solid 1px var(--sl-color-neutral-200);
  border-top-right-radius: 3px;
  cursor: ew-resize;
  transition: 250ms background-color;
}

@media screen and (max-width: 600px) {
  .code-block__preview {
    padding-right: 1.5rem;
  }

  .code-block__resizer {
    display: none;
  }
}

.code-block__source {
  border: solid 1px var(--sl-color-neutral-200);
  border-bottom: none;
  border-radius: 0 !important;
  display: none;
}

.code-block--expanded .code-block__source {
  display: block;
}

.code-block__source pre {
  margin: 0;
}

.code-block__buttons {
  position: relative;
  border: solid 1px var(--sl-color-neutral-200);
  border-bottom-left-radius: 3px;
  border-bottom-right-radius: 3px;
  display: flex;
}

.code-block__button {
  flex: 0 0 auto;
  height: 2.5rem;
  min-width: 2.5rem;
  border: none;
  border-radius: 0;
  background: var(--sl-color-neutral-0);
  font: inherit;
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  color: var(--sl-color-neutral-600);
  padding: 0 1rem;
  cursor: pointer;
}

.code-block__button:not(:last-of-type) {
  border-right: solid 1px var(--sl-color-neutral-200);
}

.code-block__button--html,
.code-block__button--react {
  width: 70px;
  display: flex;
  place-items: center;
  justify-content: center;
}

.code-block__button--selected {
  font-weight: 700;
  color: var(--sl-color-primary-600);
}

.code-block__button--codepen {
  display: flex;
  place-items: center;
  width: 6rem;
}

.code-block__button:first-of-type {
  border-bottom-left-radius: 3px;
}

.code-block__button:last-of-type {
  border-bottom-right-radius: 3px;
}

.code-block__button:hover,
.code-block__button:active {
  box-shadow: 0 0 0 1px var(--sl-color-primary-400);
  border-right-color: transparent;
  background-color: var(--sl-color-primary-50);
  color: var(--sl-color-primary-600);
  z-index: 1;
}

.code-block__button:focus-visible {
  outline: none;
  outline: var(--sl-focus-ring);
  z-index: 2;
}

.code-block__toggle {
  position: relative;
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: center;
  width: 100%;
  color: var(--sl-color-neutral-600);
  cursor: pointer;
  -webkit-appearance: none;
}

.code-block__toggle svg {
  width: 1em;
  height: 1em;
  margin-left: 0.25rem;
}

.code-block--expanded .code-block__toggle svg {
  transform: rotate(180deg);
}

/* Copy button styles */
.markdown-section .docsify-copy-code-button {
  top: 4px;
  right: 4px;
  background-color: var(--sl-color-neutral-500);
  border-radius: var(--sl-border-radius-medium);
  font-family: var(--sl-font-sans);
  font-size: var(--sl-font-size-x-small);
  font-weight: var(--sl-font-weight-semibold);
  text-transform: uppercase;
  padding: 8px;
  user-select: none;
  transition: 0.1s all;
}

.markdown-section .docsify-copy-code-button.copied {
  animation: pulse 0.75s;
  --pulse-color: var(--sl-color-neutral-600);
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 var(--pulse-color);
  }
  70% {
    box-shadow: 0 0 0 0.5rem transparent;
  }
  100% {
    box-shadow: 0 0 0 0 transparent;
  }
}

.markdown-section .docsify-copy-code-button .label {
  transition: none;
}

.markdown-section .docsify-copy-code-button .success,
.markdown-section .docsify-copy-code-button .error {
  display: none;
}

.markdown-section .docsify-copy-code-button:focus-visible {
  outline: var(--sl-focus-ring);
  outline-offset: var(--sl-focus-ring-offset);
}

.markdown-section .docsify-copy-code-button:active {
  background-color: var(--sl-color-neutral-600);
  transform: scale(0.92);
}

/* We can apply data-flavor="html|react" to any element on the page to toggle it when the user's flavor changes */
body.flavor-html [data-flavor]:not([data-flavor='html']) {
  display: none;
}

body.flavor-react [data-flavor]:not([data-flavor='react']) {
  display: none;
}