Added a background for the tabs

Dark and light theme
https://prnt.sc/rXcjFgvOTX7Y
https://prnt.sc/gT8x9Hto1yeL

.github/workflows/sync-boostlook-css.yml

@@ -16,10 +16,10 @@ jobs:
     if: github.repository == 'boostorg/boostlook'
     steps:
       - name: Checkout current repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
 
       - name: Checkout website-v2 repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
         with:
           repository: boostorg/website-v2
           ref: develop
@@ -29,7 +29,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: "3.13"
+          python-version: "3.11"
 
       - name: Copy boostlook.css to website-v2
         run: |

boostlook.css

@@ -280,8 +280,8 @@
   --main-container: 90rem;
 
   /* New Look Typography */
-  --font-family-body: "Noto Sans", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
-  --font-family-code: "Noto Sans Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
+  --font-family-body: "Noto Sans";
+  --font-family-code: "Noto Sans Mono";
   --font-size-3xs: 0.625rem;
   --font-size-2xs: 0.75rem;
   --font-size-xs: 0.875rem;
@@ -726,15 +726,10 @@ html:has(.boostlook) {
   /* Variable font weight range */
   font-variation-settings: "wght" 400, "wdth" 62.5;
   font-display: block;
-  src: url("../font/NotoSansDisplay.ttf") format("truetype"),
-  url("/static/font/notosans.woff2") format("woff2"),
+  /* Prevents FOIT */
+  src: url("/static/font/notosans.woff2") format("woff2"),
   url("../../../../tools/boostlook/notosans.woff2") format("woff2"),
   url("https://cppalliance.org/fonts/NotoSansDisplay.ttf") format("truetype");
-  /* Metric overrides to reduce CLS on swap */
-  size-adjust: 100%;
-  ascent-override: 92%;
-  descent-override: 22%;
-  line-gap-override: 0%;
 }
 
 /* Noto Sans Display - Italic */
@@ -746,15 +741,10 @@ html:has(.boostlook) {
   /* Variable font weight range */
   font-variation-settings: "wght" 400, "wdth" 62.5;
   font-display: block;
-  src: url("../font/NotoSansDisplay-Italic.ttf") format("truetype"),
-  url("/static/font/notosans_ext.woff2") format("woff2"),
-  url("../../../../tools/boostlook/notosans_ext.woff2") format("woff2"),
-  url("https://cppalliance.org/fonts/NotoSansDisplay-Italic.ttf") format("truetype");
-  /* Metric overrides to reduce CLS on swap */
-  size-adjust: 100%;
-  ascent-override: 92%;
-  descent-override: 22%;
-  line-gap-override: 0%;
+  /* Prevents FOIT */
+  src: url("/static/font/notosans_mono_ext.woff") format("woff"),
+  url("../../../../tools/boostlook/notosans_mono_ext.woff") format("woff"),
+  url("https://cppalliance.org/fonts/NotoSansMono.ttf") format("truetype");
 }
 
 /* Noto Sans Mono - Variable Weight */
@@ -766,15 +756,10 @@ html:has(.boostlook) {
   /* Variable font weight range */
   font-variation-settings: "wght" 400, "wdth" 62.5;
   font-display: block;
-  src: url("../font/NotoSansMono.ttf") format("truetype"),
-  url("/static/font/notosans_mono.woff") format("woff"),
+  /* Prevents FOIT */
+  src: url("/static/font/notosans_mono.woff") format("woff"),
   url("../../../../tools/boostlook/notosans_mono.woff") format("woff"),
   url("https://cppalliance.org/fonts/NotoSansMono.ttf") format("truetype");
-  /* Metric overrides to reduce CLS on swap */
-  size-adjust: 100%;
-  ascent-override: 92%;
-  descent-override: 22%;
-  line-gap-override: 0%;
 }
 
 /* Noto Sans Mono - Fixed Weight */
@@ -785,15 +770,10 @@ html:has(.boostlook) {
   /* Fixed weight for specific use cases */
   font-stretch: 62.5% 100%;
   font-display: block;
-  src: url("../font/NotoSansMono.ttf") format("truetype"),
-  url("/static/font/notosans_mono.woff") format("woff"),
+  /* Prevents FOIT */
+  src: url("/static/font/notosans_mono.woff") format("woff"),
   url("../../../../tools/boostlook/notosans_mono.woff") format("woff"),
   url("https://cppalliance.org/fonts/NotoSansMono.ttf") format("truetype");
-  /* Metric overrides to reduce CLS on swap */
-  size-adjust: 100%;
-  ascent-override: 92%;
-  descent-override: 22%;
-  line-gap-override: 0%;
 }
 
 /*----------------- Font-Face Declarations end -----------------*/
@@ -1278,6 +1258,12 @@ div.source-docs-antora.boostlook:not(:has(.doc)):not(:has(>.boostlook)) > #conte
   cursor: pointer;
 }
 
+/* Link States */
+.boostlook p a:visited:not(:hover),
+.boostlook table a:visited:not(:hover) {
+  color: var(--text-main-text-body-tetriary, #62676b);
+}
+
 /* Emphasis within code */
 .boostlook em,
 .boostlook code em {
@@ -1358,10 +1344,8 @@ html.dark .boostlook pre.rouge,
 html.dark .boostlook .doc .content pre,
 html.dark .boostlook .doc pre.highlight,
 html.dark .boostlook .doc .listingblock pre:not(.highlight),
-html.dark .boostlook .doc .literalblock pre,
-html.dark .boostlook#libraryReadMe > pre:not(:last-child),
-html.dark .boostlook#libraryReadMe div.highlight:has(> pre):not(:is(dd pre, td pre)) {
-  background: var(--atom-one-dark-bg, #282c34) !important;
+html.dark .boostlook .doc .literalblock pre {
+  background: var(--atom-one-dark-bg, #282c34);
 }
 
 .boostlook .doc pre {
@@ -2663,7 +2647,7 @@ div.source-docs-antora.boostlook:not(:has(.doc)):not(:has(>.boostlook)) > #conte
   justify-content: center;
   font-family: "Noto Sans";
   font-style: normal;
-  font-variation-settings: "wght" 350, "wdth" 80;
+  font-variation-settings: "wght" 500, "wdth" 80;
   line-height: var(--typography-line-height-sm, 1rem);
   font-size: var(--typography-font-size-sm, 1rem);
   text-align: center;
@@ -3805,13 +3789,6 @@ html.dark .boostlook pre.rouge .cm {
   gap: 0.125rem;
 }
 
-.boostlook .toolbar .spirit-nav .disabled,
-.boostlook:not(:has(.doc)) .spirit-nav .disabled {
-  opacity: 0.35;
-  cursor: not-allowed;
-  pointer-events: none;
-}
-
 .boostlook:not(:has(.doc)) .spirit-nav {
   padding-top: var(--padding-padding-md, 1.125rem);
   justify-content: flex-end;