style(navbar): dark outline instead of white halo on gym logo buttons

site/assets/css/style.css

@@ -539,7 +539,8 @@ section[id] {
    frosted navbar. */
 .gym-switch-btn--logo::after,
 .gym-switch-btn--logo:is(:hover, :focus-visible)::after { display: none; }
-.gym-switch-btn--logo .gym-switch-logo { filter: drop-shadow(0 0 1.5px rgba(255, 255, 255, .9)); }
+/* Thin dark outline, not a white halo: a white glow washed out the lime FitMe 3070 logo. */
+.gym-switch-btn--logo .gym-switch-logo { filter: drop-shadow(0 0 .6px rgba(0, 0, 0, .55)) drop-shadow(0 1px 1px rgba(0, 0, 0, .18)); }
 
 /* ── Sticky Navbar ─────────────────────────────────────────────────────────── */
 .navbar-toggler {