Style a11y button: blue bg, white icon, theme-aware shade

Light mode uses darker blue (#1565c0), dark mode uses lighter blue
(#42a5f5). No hover effect — only active ring when panel is open.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/media/css/template.css

@@ -17207,6 +17207,15 @@ button#mokoThemeSwitch {
 }
 
 /* Inline a11y toggle inside theme FAB */
+/* Light mode: darker blue */
+:root[data-bs-theme="light"] .a11y-toggle-inline {
+	--a11y-btn-bg: #1565c0;
+}
+/* Dark mode: lighter blue */
+:root[data-bs-theme="dark"] .a11y-toggle-inline {
+	--a11y-btn-bg: #42a5f5;
+}
+
 .a11y-toggle-inline {
 	display: flex;
 	align-items: center;
@@ -17214,25 +17223,16 @@ button#mokoThemeSwitch {
 	width: 28px;
 	height: 28px;
 	border-radius: 50%;
-	border: 1.5px solid currentColor;
-	background: transparent;
-	color: inherit;
+	border: none;
+	background: var(--a11y-btn-bg, #1976d2);
+	color: #fff;
 	font-size: 1rem;
 	cursor: pointer;
 	padding: 0;
-	transition: background .2s, color .2s;
-	opacity: .8;
-}
-
-.a11y-toggle-inline:hover,
-.a11y-toggle-inline:focus-visible {
-	opacity: 1;
-	background: rgba(255,255,255,.15);
 }
 
 .a11y-toggle-inline.active {
-	opacity: 1;
-	background: rgba(255,255,255,.25);
+	box-shadow: 0 0 0 2px #fff, 0 0 0 4px var(--a11y-btn-bg, #1976d2);
 }
 
 /* Floating a11y panel when inline */