Group tool libraries by model and component role

style.css

@@ -45,3 +45,6 @@ nav a.nav-sub{padding-left:28px;font-size:12px;color:var(--deck-tone-a4bda8, #a4
 
 /* Control is a focused mode chooser; detailed API configuration lives in settings. */
 .control-modes{display:flex;gap:12px;margin:24px 0 20px}.control-modes button{min-width:110px;margin:0;font-size:15px}.control-card{max-width:900px}.control-heading{display:flex;align-items:center;justify-content:space-between;gap:16px}.control-heading h2{margin:0;font-size:25px}.control-card>.card-actions{margin-top:18px}.control-api{border-top:1px solid var(--deck-tone-303a37,#303a37);margin-top:24px;padding-top:8px}.control-api h3{font-size:14px}.control-api>div{display:grid;grid-template-columns:130px minmax(0,1fr);gap:14px;margin:12px 0;font-size:13px}.control-api span{color:var(--deck-tone-97a79e,#97a79e)}.control-api code{overflow-wrap:anywhere}.control-details{border-top:1px solid var(--deck-tone-303a37,#303a37);padding-top:16px;margin-top:20px}.control-card .small{font-size:12px}@media(max-width:600px){.control-modes{gap:8px}.control-modes button{min-width:0;flex:1;padding:12px}.control-api>div{grid-template-columns:1fr;gap:4px}}
+
+.library-group + .library-group { margin-top: 1.5rem; }
+.library-group > h3 { margin: .5rem 0 .75rem; }