feat(site): align docs code blocks with the landing page's VS Code themes

Docs code blocks were highlighted with dracula/github while the landing
figures use shiki's dark-plus/light-plus, so code looked different the
moment you left the home page.

prism-react-renderer's vsLight is not Light+ (blue functions and
punctuation, green variables) and vsDark colors primitives and
constants wrong, so both themes are hand-authored from the VS Code
theme JSON in src/prismThemes.ts and wired into the prism config.

Also gives the docusaurus highlighted-line background a dark-mode
value; the light-mode black tint was invisible on the new #1e1e1e
code background.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: igalklebanov

site/docusaurus.config.ts

@@ -4,9 +4,9 @@ import type {
 } from '@docusaurus/preset-classic'
 import type { Config } from '@docusaurus/types'
 import type { MermaidConfig } from 'mermaid'
-import { themes } from 'prism-react-renderer'
 import type { PluginOptions as LLMsTXTPluginOptions } from '@signalwire/docusaurus-plugin-llms-txt'
 import type { PluginOptions as VercelAnalyticsPluginOptions } from '@docusaurus/plugin-vercel-analytics'
+import { darkPlus, lightPlus } from './src/prismThemes'
 import { socialIconPaths } from './src/components/socialIconPaths'
 
 function socialNavbarItem(
@@ -245,8 +245,8 @@ export default {
       title: 'Kysely',
     },
     prism: {
-      darkTheme: themes.dracula,
-      theme: themes.github,
+      darkTheme: darkPlus,
+      theme: lightPlus,
     },
   } satisfies PresetClassicThemeConfig,
   clientModules: ['./src/clientModules/navbarScroll.ts'],

site/src/css/custom.css

@@ -45,6 +45,9 @@
 }
 
 [data-theme='dark'] {
+  /* The light-mode value is a black tint, invisible on the #1e1e1e code
+     background. */
+  --docusaurus-highlighted-code-line-bg: rgba(255, 255, 255, 0.07);
   --ifm-color-primary: #38bdf8;
   --ifm-color-primary-dark: #0ea5e9;
   --ifm-color-primary-darker: #0284c7;

site/src/prismThemes.ts

@@ -0,0 +1,131 @@
+import type { PrismTheme } from 'prism-react-renderer'
+
+/**
+ * VS Code Dark+ / Light+ palettes mapped onto Prism token types, so docs
+ * code blocks match the landing page figures (highlighted with shiki's
+ * `dark-plus` / `light-plus` themes) and the hero demo video.
+ *
+ * Color sources: shiki's `dark-plus` / `light-plus` theme JSON. Prism
+ * cannot tell control-flow keywords or object keys apart from regular
+ * keywords and identifiers, so those keep the base keyword and variable
+ * colors.
+ *
+ * Prism leaves TypeScript identifiers untokenized, so `plain` carries the
+ * VS Code variable color in dark mode (#9cdcfe), matching how kysely
+ * queries render in the editor. Punctuation and operators are tokenized
+ * and pull those back to the editor foreground (#d4d4d4).
+ */
+
+export const darkPlus = {
+  plain: {
+    backgroundColor: '#1e1e1e',
+    color: '#9cdcfe',
+  },
+  styles: [
+    {
+      style: { color: '#6a9955' },
+      types: ['comment', 'prolog', 'cdata'],
+    },
+    {
+      style: { color: '#569cd6' },
+      types: ['keyword', 'boolean', 'tag', 'changed'],
+    },
+    {
+      style: { color: '#ce9178' },
+      types: ['string', 'char', 'attr-value', 'template-string', 'deleted'],
+    },
+    {
+      style: { color: '#b5cea8' },
+      types: ['number', 'inserted'],
+    },
+    {
+      style: { color: '#dcdcaa' },
+      types: ['function'],
+    },
+    {
+      style: { color: '#4ec9b0' },
+      types: ['class-name', 'builtin', 'maybe-class-name', 'namespace'],
+    },
+    {
+      style: { color: '#4fc1ff' },
+      types: ['constant'],
+    },
+    {
+      style: { color: '#9cdcfe' },
+      types: ['variable', 'attr-name', 'property', 'literal-property'],
+    },
+    {
+      style: { color: '#d4d4d4' },
+      types: ['operator', 'punctuation'],
+    },
+    {
+      style: { color: '#d16969' },
+      types: ['regex'],
+    },
+    {
+      style: { color: '#d7ba7d' },
+      types: ['selector'],
+    },
+  ],
+} satisfies PrismTheme
+
+export const lightPlus = {
+  plain: {
+    backgroundColor: '#ffffff',
+    color: '#000000',
+  },
+  styles: [
+    {
+      style: { color: '#008000' },
+      types: ['comment', 'prolog', 'cdata'],
+    },
+    {
+      style: { color: '#0000ff' },
+      types: ['keyword', 'boolean'],
+    },
+    {
+      style: { color: '#a31515' },
+      types: ['string', 'char', 'attr-value', 'template-string', 'deleted'],
+    },
+    {
+      style: { color: '#098658' },
+      types: ['number', 'inserted'],
+    },
+    {
+      style: { color: '#795e26' },
+      types: ['function'],
+    },
+    {
+      style: { color: '#267f99' },
+      types: ['class-name', 'builtin', 'maybe-class-name', 'namespace'],
+    },
+    {
+      style: { color: '#0070c1' },
+      types: ['constant'],
+    },
+    {
+      style: { color: '#001080' },
+      types: ['variable', 'literal-property'],
+    },
+    {
+      style: { color: '#0451a5' },
+      types: ['property', 'changed'],
+    },
+    {
+      style: { color: '#e50000' },
+      types: ['attr-name'],
+    },
+    {
+      style: { color: '#800000' },
+      types: ['tag', 'selector'],
+    },
+    {
+      style: { color: '#000000' },
+      types: ['operator', 'punctuation'],
+    },
+    {
+      style: { color: '#811f3f' },
+      types: ['regex'],
+    },
+  ],
+} satisfies PrismTheme