Harden CMS security and theme contrast

src/app/radio/layout.tsx

@@ -37,7 +37,7 @@ export default async function RadioLayout({ children }: { children: ReactNode })
             padding: "0.55rem 0.75rem",
             fontWeight: 700,
             fontSize: "1rem",
-            color: "var(--color-text)",
+            color: "var(--color-text-readable, var(--color-text))",
             textDecoration: "none",
             borderBottom: "1px solid color-mix(in srgb, var(--color-text-muted) 14%, transparent)",
             marginBottom: "0.25rem",
@@ -59,7 +59,7 @@ export default async function RadioLayout({ children }: { children: ReactNode })
               gap: "0.5rem",
               padding: "0.5rem 0.75rem",
               borderRadius: "8px",
-              color: "var(--color-text)",
+              color: "var(--color-text-readable, var(--color-text))",
               textDecoration: "none",
               fontSize: "0.9rem",
               transition: "background 0.15s",