Apply Copilot suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: RoyEJohnson

src/app/components/Footer/Footer.css

@@ -442,11 +442,6 @@
   width: 3rem;
 }
 
-/* Icon styles */
-.footer-icon {
-  height: 1em;
-}
-
 /* Footer logo */
 .footer-logo {
   height: 4.7rem;

src/app/components/NavBar/NavBar.css

@@ -77,7 +77,7 @@
   text-decoration: none;
   font-weight: bold;
   padding: 1rem 0 0.6rem 0;
-  color: var(--nav-text-color, #5f6163);
+  color: var(--nav-text-color, #5e6062);
   animation: 100ms fadeIn ease-out;
   border-bottom: 0.4rem solid transparent;
 }
@@ -199,10 +199,10 @@
   white-space: nowrap;
   display: block;
   padding: 0 1rem;
-  font-size: 1.4rem;
+  font-size: 1.6rem;
   font-weight: normal;
-  letter-spacing: -0.01rem;
-  line-height: 2.5rem;
+  letter-spacing: -0.032rem;
+  line-height: 2.4rem;
   color: var(--nav-text-color, #5f6163);
   cursor: pointer;
   text-decoration: none;