Fix margins on resource pages

Add max-width constraints to map and search input to match Tufte CSS
standard width (55%) and prevent content from stretching to edges.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

kjvstudy_org/templates/biblical_maps.html

@@ -9,8 +9,9 @@
 <style>
 .map-container {
     width: 100%;
+    max-width: 55%;
     height: 500px;
-    margin: 2rem 0;
+    margin: 2rem auto;
     border: 1px solid #ccc;
 }
 

kjvstudy_org/templates/search.html

@@ -11,7 +11,7 @@
 
 .search-input {
     width: 100%;
-    max-width: 600px;
+    max-width: 55%;
     padding: 0.75rem;
     font-size: 1.1rem;
     border: 1px solid #ccc;