feat: Update auth screens (#11108)

# Pull Request Template

## Description

This PR includes style updates for auth screens

## Type of change

- [x] Bug fix (non-breaking change which fixes an issue)


## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

app/javascript/v3/views/login/Index.vue

@@ -155,7 +155,7 @@ export default {
 
 <template>
   <main
-    class="flex flex-col w-full min-h-screen py-20 bg-woot-25 sm:px-6 lg:px-8 dark:bg-slate-900"
+    class="flex flex-col w-full min-h-screen py-20 bg-n-brand/5 dark:bg-n-background sm:px-6 lg:px-8"
   >
     <section class="max-w-5xl mx-auto">
       <img
@@ -169,25 +169,20 @@ export default {
         :alt="globalConfig.installationName"
         class="hidden w-auto h-8 mx-auto dark:block"
       />
-      <h2
-        class="mt-6 text-3xl font-medium text-center text-slate-900 dark:text-woot-50"
-      >
+      <h2 class="mt-6 text-3xl font-medium text-center text-n-slate-12">
         {{
           useInstallationName($t('LOGIN.TITLE'), globalConfig.installationName)
         }}
       </h2>
-      <p
-        v-if="showSignupLink"
-        class="mt-3 text-sm text-center text-slate-600 dark:text-slate-400"
-      >
+      <p v-if="showSignupLink" class="mt-3 text-sm text-center text-n-slate-11">
         {{ $t('COMMON.OR') }}
-        <router-link to="auth/signup" class="lowercase text-link">
+        <router-link to="auth/signup" class="lowercase text-link text-n-brand">
           {{ $t('LOGIN.CREATE_NEW_ACCOUNT') }}
         </router-link>
       </p>
     </section>
     <section
-      class="bg-white shadow sm:mx-auto mt-11 sm:w-full sm:max-w-lg dark:bg-slate-800 p-11 sm:shadow-lg sm:rounded-lg"
+      class="bg-white shadow sm:mx-auto mt-11 sm:w-full sm:max-w-lg dark:bg-n-solid-2 p-11 sm:shadow-lg sm:rounded-lg"
       :class="{
         'mb-8 mt-15': !showGoogleOAuth,
         'animate-wiggle': loginApi.hasErrored,