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

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

.sl-theme-dark .code-block {
  background-color: rgb(var(--sl-color-neutral-200));
}

.code-block__preview {
  position: relative;
  border: solid 1px rgb(var(--sl-color-neutral-200));
  border-bottom: none;
  border-top-left-radius: 3px;
  border-top-right-radius: 3px;
  background-color: rgb(var(--sl-color-neutral-1000));
  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: rgb(var(--sl-color-neutral-500));
  background-color: rgb(var(--sl-color-neutral-1000));
  border-left: solid 1px rgb(var(--sl-color-neutral-200));
  border-top-right-radius: 3px;
  cursor: ew-resize;
  transition: 250ms background-color;
}

.code-block__resizer:focus {
  outline: none;
  box-shadow: 0 0 0 1px rgb(var(--sl-color-primary-400)),
    0 0 0 var(--sl-focus-ring-width) rgb(var(--sl-focus-ring-color-primary) / var(--sl-focus-ring-alpha));
  background-color: rgb(var(--sl-color-primary-50));
  color: rgb(var(--sl-color-primary-600));
  z-index: 2;
}

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

  .code-block__resizer {
    display: none;
  }
}

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

.code-block .docsify-copy-code-button {
  top: var(--sl-spacing-x-small);
  right: var(--sl-spacing-x-small);
  background-color: rgb(var(--sl-color-neutral-500));
  font-family: var(--sl-font-sans);
  font-size: var(--sl-font-size-x-small);
  font-weight: var(--sl-font-weight-semibold);
  border-radius: var(--sl-border-radius-small);
  padding: 5px 8px;
  opacity: 1;
  cursor: copy;
}

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

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

.code-block .docsify-copy-code-button:focus {
  box-shadow: 0 0 0 var(--sl-focus-ring-width) rgb(var(--sl-focus-ring-color-neutral) / var(--sl-focus-ring-alpha));
}

.code-block .docsify-copy-code-button:active {
  background-color: rgb(var(--sl-color-neutral-600));
}

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

.code-block__buttons {
  position: relative;
  border: solid 1px rgb(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: rgb(var(--sl-color-neutral-1000));
  font: inherit;
  font-size: 0.875rem;
  color: rgb(var(--sl-color-neutral-600));
  padding: 0 0.5rem;
  cursor: pointer;
  transition: none;
}

.code-block__button--codepen {
  width: 5rem;
}

.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 rgb(var(--sl-color-primary-400));
  background-color: rgb(var(--sl-color-primary-50));
  color: rgb(var(--sl-color-primary-600));
  z-index: 1;
}

.code-block__button:focus {
  outline: none;
  color: rgb(var(--sl-color-primary-600));
  border-color: rgb(var(--sl-color-primary-400));
  background-color: rgb(var(--sl-color-primary-50));
  box-shadow: 0 0 0 1px rgb(var(--sl-color-primary-400)),
    0 0 0 var(--sl-focus-ring-width) rgb(var(--sl-focus-ring-color-primary) / var(--sl-focus-ring-alpha));
  z-index: 2;
}

.code-block__toggle {
  position: relative;
  z-index: 1;
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 2.5rem;
  font: inherit;
  font-size: 0.7rem;
  font-weight: 500;
  color: rgb(var(--sl-color-neutral-600));
  cursor: pointer;
  transition: 250ms background-color;
  -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);
}