feat(admissions): add sticky left-rail in-page nav, primary first

Rail pins alongside the content with scroll-spy highlighting the current
section (Primary, Secondary, Tips). Collapses to a sticky top pill bar
on narrow screens. Primary section now precedes Secondary.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

nextjs-app/components/AdmissionsView.module.css

@@ -1,7 +1,83 @@
-.page {
-  max-width: 900px;
+.shell {
+  max-width: 1120px;
   margin: 0 auto;
   padding: 0 1.25rem 4rem;
+  display: grid;
+  grid-template-columns: 160px minmax(0, 1fr);
+  gap: 2.5rem;
+  align-items: start;
+}
+
+.page {
+  max-width: 900px;
+  width: 100%;
+  justify-self: center;
+}
+
+/* ─── In-page nav rail ────────────────────────────────── */
+
+.nav {
+  position: sticky;
+  top: 1.5rem;
+  padding-top: 3.75rem;
+}
+
+.navLabel {
+  font-size: 0.65rem;
+  font-weight: 700;
+  letter-spacing: 0.1em;
+  text-transform: uppercase;
+  color: var(--text-muted, #6d685f);
+  margin-bottom: 0.85rem;
+  padding-left: 0.85rem;
+}
+
+.navList {
+  list-style: none;
+  padding: 0;
+  margin: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 0.1rem;
+  border-left: 2px solid var(--border-color, #e5dfd5);
+}
+
+.navLink {
+  display: flex;
+  align-items: center;
+  gap: 0.55rem;
+  padding: 0.45rem 0.85rem;
+  margin-left: -2px;
+  border-left: 2px solid transparent;
+  font-size: 0.88rem;
+  font-weight: 500;
+  color: var(--text-secondary, #5c564d);
+  text-decoration: none;
+  cursor: pointer;
+  transition: color 0.15s ease, border-color 0.15s ease;
+}
+
+.navLink:hover {
+  color: var(--text-primary, #1a1612);
+}
+
+.navLinkActive {
+  color: var(--accent-teal, #2d7d7d);
+  font-weight: 700;
+  border-left-color: var(--accent-teal, #2d7d7d);
+}
+
+.navDot {
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background: var(--border-color, #e5dfd5);
+  flex-shrink: 0;
+  transition: background 0.15s ease;
+}
+
+.navLinkActive .navDot {
+  background: var(--accent-teal, #2d7d7d);
 }
 
 /* ─── Hero ───────────────────────────────────────────── */
@@ -396,6 +472,60 @@
 
 /* ─── Responsive ─────────────────────────────────────── */
 
+@media (max-width: 960px) {
+  .shell {
+    grid-template-columns: 1fr;
+    gap: 0;
+    padding-top: 0;
+  }
+
+  .nav {
+    position: sticky;
+    top: 0;
+    padding-top: 0;
+    background: var(--bg-primary, #faf8f3);
+    border-bottom: 1px solid var(--border-color, #e5dfd5);
+    margin: 0 -1.25rem 1rem;
+    padding: 0.6rem 1.25rem;
+    z-index: 10;
+  }
+
+  .navLabel {
+    display: none;
+  }
+
+  .navList {
+    flex-direction: row;
+    gap: 0.35rem;
+    border-left: none;
+    overflow-x: auto;
+    -webkit-overflow-scrolling: touch;
+  }
+
+  .navList::-webkit-scrollbar {
+    display: none;
+  }
+
+  .navLink {
+    padding: 0.4rem 0.9rem;
+    margin-left: 0;
+    border-left: none;
+    border-radius: 999px;
+    background: transparent;
+    white-space: nowrap;
+  }
+
+  .navLinkActive {
+    background: var(--text-primary, #1a1612);
+    color: #fff;
+    border-left: none;
+  }
+
+  .navLinkActive .navDot {
+    background: #fff;
+  }
+}
+
 @media (max-width: 768px) {
   .heroTitle {
     font-size: 2rem;