Remove dead CSS for qa-top-nav and thanks-page Q&A overrides; v1.0.7

These rules became orphaned after converting QuestionsPage to a full site
layout and removing the back-to-site nav link from QASection.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "siteforge",
   "private": true,
-  "version": "1.0.6",
+  "version": "1.0.7",
   "type": "module",
   "scripts": {
     "dev": "vite",

src/App.css

@@ -5918,33 +5918,6 @@
   border-top: 1px solid rgba(201, 168, 76, 0.2);
 }
 
-.qa-top-nav {
-  display: flex;
-  justify-content: flex-start;
-  margin-top: 0.85rem;
-  margin-bottom: 0.9rem;
-}
-
-.qa-back-to-site {
-  display: inline-flex;
-  align-items: center;
-  border: 1px solid rgba(201, 168, 76, 0.3);
-  color: #d8c395;
-  text-decoration: none;
-  border-radius: 999px;
-  padding: 0.35rem 0.72rem;
-  font-size: 0.77rem;
-  letter-spacing: 0.05em;
-  text-transform: uppercase;
-  background: rgba(201, 168, 76, 0.06);
-}
-
-.qa-back-to-site:hover {
-  color: #f0ddb3;
-  background: rgba(201, 168, 76, 0.14);
-  border-color: rgba(201, 168, 76, 0.45);
-}
-
 .qa-filters {
   display: flex;
   flex-direction: column;
@@ -6491,22 +6464,6 @@
 }
 
 @media (max-width: 768px) {
-  /* ── Page wrapper override (QuestionsPage uses thanks-page/thanks-card) ── */
-  .thanks-page:has(.section-qa) {
-    padding: 0;
-    align-items: stretch;
-  }
-
-  .thanks-card:has(.section-qa) {
-    width: 100%;
-    max-width: 100% !important;
-    border-radius: 0;
-    border-left: none;
-    border-right: none;
-    padding: 0;
-    box-shadow: none;
-  }
-
   /* ── Container ── */
   .section-qa .section-inner {
     padding: 0;
@@ -6516,16 +6473,7 @@
     border-top: none;
   }
 
-  /* ── Top nav ── */
-  .qa-top-nav {
-    margin: 0.9rem 1rem 0.7rem;
-  }
 
-  .qa-back-to-site {
-    font-size: 0.74rem;
-    padding: 0.38rem 0.75rem;
-    min-height: 38px;
-  }
 
   /* ── Heading ── */
   .section-qa .section-heading {