Apply warm editorial design system across all components

Replace generic blue/gray colors with warm editorial palette:
- Navigation: coral active states, branded logo colors
- Footer: navy background, gold section titles
- FilterBar: coral search button and focus states
- SchoolCard: coral left accent on hover, teal/coral buttons
- HomeView: gradient hero section, Playfair Display headings
- RankingsView: gold top-3 highlights, warm table styling
- ComparisonView: teal card borders, coral buttons

Consistent use of CSS variables and Playfair Display serif font
for headings throughout.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

nextjs-app/components/Navigation.module.css

@@ -2,9 +2,9 @@
   position: sticky;
   top: 0;
   z-index: 100;
-  background: white;
-  border-bottom: 1px solid #e5e7eb;
-  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
+  background: var(--bg-card, white);
+  border-bottom: 1px solid var(--border-color, #e5dfd5);
+  box-shadow: 0 2px 8px rgba(26, 22, 18, 0.06);
 }
 
 .container {
@@ -22,22 +22,26 @@
   align-items: center;
   gap: 0.75rem;
   text-decoration: none;
-  color: #1f2937;
+  color: var(--text-primary, #1a1612);
   font-size: 1.25rem;
   font-weight: 700;
   transition: color 0.2s ease;
 }
 
 .logo:hover {
-  color: #3b82f6;
+  color: var(--accent-coral, #e07256);
 }
 
 .logoIcon {
-  font-size: 1.5rem;
+  width: 36px;
+  height: 36px;
+  color: var(--accent-coral, #e07256);
 }
 
 .logoText {
+  font-family: var(--font-playfair), 'Playfair Display', serif;
   font-weight: 700;
+  letter-spacing: -0.01em;
 }
 
 .nav {
@@ -53,20 +57,20 @@
   padding: 0.625rem 1rem;
   font-size: 0.9375rem;
   font-weight: 500;
-  color: #6b7280;
+  color: var(--text-secondary, #5c564d);
   text-decoration: none;
   border-radius: 6px;
   transition: all 0.2s ease;
 }
 
 .navLink:hover {
-  color: #1f2937;
-  background: #f3f4f6;
+  color: var(--text-primary, #1a1612);
+  background: var(--bg-secondary, #f3ede4);
 }
 
 .navLink.active {
-  color: #3b82f6;
-  background: #eff6ff;
+  color: var(--accent-coral, #e07256);
+  background: rgba(224, 114, 86, 0.1);
 }
 
 .badge {
@@ -79,7 +83,7 @@
   font-size: 0.75rem;
   font-weight: 600;
   color: white;
-  background: #3b82f6;
+  background: var(--accent-coral, #e07256);
   border-radius: 9999px;
 }