message: Some improvements in documentation dark mode
diff: --ah-white: #fff;
  --light-gray: #f8f9fa;
  --mid-gray: #f6f8fa;
  + --border-table: #e9ecef;
  + --strong-font: #38383f;
  + --bg-code: #272822;
  + --color-code: #f8f8f2;
  }
  [data-theme='dark'] {
  --ah-white: #000;
  --light-gray: #131216;
  --mid-gray: #131216;
  + --border-table: #49494C;
  + --strong-font: #cbd3da;
  + --bg-code: #131216;
  + --color-code: #a3a3a6;
  }
  @font-face {
  @@ -111,12 +119,6 @@ code {
  word-wrap: break-word;
  }
  -.gdoc-markdown pre {
  - overflow-x: auto;
  - border-radius: 3px;
  - padding: .5rem 1rem;
  -}
  -
  .gdoc-markdown *:not(pre) > code {
  color: var(--secondary-font);
  hyphens: none;
  @@ -135,9 +137,12 @@ code {
  }
  .gdoc-markdown pre {
  - color:#f8f8f2;
  - background-color:#272822;
  + overflow-x: auto;
  + border-radius: 3px;
  + padding: .5rem 1rem;
  tab-size: 4;
  + background-color: var(--bg-code) !important;
  + color: var(--color-code) !important;
  }
  .gdoc-markdown table {
  @@ -152,6 +157,10 @@ code {
  color: var(--primary-font);
  }
  +.gdoc-markdown table tr td, .gdoc-markdown table tr th {
  + border-color: var(--border-table) !important;
  +}
  +
  /* Menu */
  .gdoc-nav {
  flex: 0 0 20rem;
  @@ -202,6 +211,10 @@ ul ul .gdoc-nav__item, .gdoc-nav__entry-root {
  font-weight: normal !important;
  }
  +strong {
  + color: var(--strong-font) !important;
  +}
  +
  .gdoc-nav__list .gdoc-nav__entry:hover {
  background-color: var(--light-gray);
  text-decoration: none;
  