Replace leadership section with Get-in-contact CTA

Swap the founder/leadership section for a 'Get in contact' section with a
mailto button; nav now links to #contact and an Email us action.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

styles.css

@@ -162,10 +162,9 @@ h1{
 }
 .card p{margin:0;color:var(--muted);font-size:15.5px}
 
-/* ---- founder ---- */
-.founder-body{max-width:64ch;display:grid;gap:22px}
-.founder-body p{margin:0;color:var(--muted);font-size:1.12rem}
-.founder-body strong{color:var(--text);font-weight:600}
+/* ---- contact ---- */
+.contact-lede{max-width:52ch;color:var(--muted);font-size:clamp(1.05rem,1.6vw,1.25rem);margin:0 0 34px}
+.btn-lg{padding:16px 30px;font-size:16px}
 
 /* ---- footer ---- */
 .foot{