diff --git a/src/components/ThemeProvider.tsx b/src/components/ThemeProvider.tsx
index 66cd34251..10c2e1ef8 100644
--- a/src/components/ThemeProvider.tsx
+++ b/src/components/ThemeProvider.tsx
@@ -40,6 +40,7 @@ const getSystemTheme = createIsomorphicFn()
 
 const updateThemeClass = createClientOnlyFn((themeMode: ThemeMode) => {
   const root = document.documentElement
+  if (!root) return
   root.classList.add('theme-switching')
 
   root.classList.remove('light', 'dark', 'auto')
@@ -145,7 +146,7 @@ export const useTheme = () => {
 // Reads from DOM on client (matches what head script set), empty on server
 const getHtmlClass = createIsomorphicFn()
   .server(() => '')
-  .client(() => document.documentElement.className)
+  .client(() => document.documentElement?.className ?? '')
 
 export function useHtmlClass(): string {
   return getHtmlClass()
diff --git a/src/routes/__root.tsx b/src/routes/__root.tsx
index 936d3bf33..c3a6098fa 100644
--- a/src/routes/__root.tsx
+++ b/src/routes/__root.tsx
@@ -43,8 +43,8 @@ import { twMerge } from 'tailwind-merge'
 const GOOGLE_ANALYTICS_ID = 'G-JMT1Z50SPS'
 const GOOGLE_ANALYTICS_PROXY_PREFIX = '/_a'
 const GOOGLE_ANALYTICS_SCRIPT_SRC = `${GOOGLE_ANALYTICS_PROXY_PREFIX}/gtag.js`
-const THEME_BOOTSTRAP = `(function(){try{var t=localStorage.getItem('theme')||'auto';var v=['light','dark','auto'].includes(t)?t:'auto';var r=v==='auto'?(matchMedia('(prefers-color-scheme: dark)').matches?'dark':'light'):v;document.documentElement.classList.add(r);if(v==='auto')document.documentElement.classList.add('auto');document.documentElement.style.colorScheme=r}catch(e){var r=matchMedia('(prefers-color-scheme: dark)').matches?'dark':'light';document.documentElement.classList.add(r,'auto');document.documentElement.style.colorScheme=r}})()`
-const GOOGLE_ANALYTICS_BOOTSTRAP = `(function(){var id='${GOOGLE_ANALYTICS_ID}';var src='${GOOGLE_ANALYTICS_SCRIPT_SRC}';window.dataLayer=window.dataLayer||[];window.gtag=window.gtag||function(){window.dataLayer.push(arguments)};window.gtag('js',new Date());window.gtag('config',id,{transport_url:window.location.origin+'${GOOGLE_ANALYTICS_PROXY_PREFIX}'});var loaded=false;var load=function(){if(loaded)return;loaded=true;var script=document.createElement('script');script.async=true;script.src=src;script.setAttribute('data-ga-loader','true');document.head.appendChild(script)};if(typeof window.requestIdleCallback==='function'){window.requestIdleCallback(load,{timeout:3000});return}if(document.readyState==='complete'){window.setTimeout(load,1500);return}window.addEventListener('load',function(){window.setTimeout(load,1500)},{once:true})})();`
+const THEME_BOOTSTRAP = `(function(){try{var t=localStorage.getItem('theme')||'auto';var v=['light','dark','auto'].includes(t)?t:'auto';var r=v==='auto'?(matchMedia('(prefers-color-scheme: dark)').matches?'dark':'light'):v;if(document.documentElement){document.documentElement.classList.add(r);if(v==='auto')document.documentElement.classList.add('auto');document.documentElement.style.colorScheme=r}}catch(e){if(document.documentElement){var r=matchMedia('(prefers-color-scheme: dark)').matches?'dark':'light';document.documentElement.classList.add(r,'auto');document.documentElement.style.colorScheme=r}}})()`
+const GOOGLE_ANALYTICS_BOOTSTRAP = `(function(){var id='${GOOGLE_ANALYTICS_ID}';var src='${GOOGLE_ANALYTICS_SCRIPT_SRC}';window.dataLayer=window.dataLayer||[];window.gtag=window.gtag||function(){window.dataLayer.push(arguments)};window.gtag('js',new Date());window.gtag('config',id,{transport_url:window.location.origin+'${GOOGLE_ANALYTICS_PROXY_PREFIX}'});var loaded=false;var load=function(){if(loaded)return;var parent=document.head||document.documentElement;if(!parent){window.setTimeout(load,100);return}loaded=true;var script=document.createElement('script');script.async=true;script.src=src;script.setAttribute('data-ga-loader','true');parent.appendChild(script)};if(typeof window.requestIdleCallback==='function'){window.requestIdleCallback(load,{timeout:3000});return}if(document.readyState==='complete'){window.setTimeout(load,1500);return}window.addEventListener('load',function(){window.setTimeout(load,1500)},{once:true})})();`
 const DOCUMENT_CACHE_HEADERS = {
   'Cache-Control': 'public, max-age=0, must-revalidate',
   'Cloudflare-CDN-Cache-Control': 'no-store',