fix: mobile menu — unified header background, remove booking button

src/components/layout/Header.tsx

@@ -83,7 +83,7 @@ export function Header() {
   return (
     <header
       className={`fixed top-0 z-50 w-full transition-all duration-500 ${
-        scrolled
+        scrolled || menuOpen
           ? "bg-black/40 shadow-none backdrop-blur-xl"
           : "bg-transparent"
       }`}
@@ -150,7 +150,7 @@ export function Header() {
           menuOpen ? "max-h-[80vh] opacity-100" : "max-h-0 opacity-0"
         }`}
       >
-        <nav className="border-t border-white/[0.06] bg-black/40 px-6 py-4 text-center backdrop-blur-xl sm:px-8">
+        <nav className="border-t border-white/[0.06] px-6 py-4 text-center sm:px-8">
           {visibleLinks.map((link) => {
             const isActive = activeSection === link.href.replace("#", "");
             return (
@@ -168,15 +168,6 @@ export function Header() {
               </a>
             );
           })}
-          <button
-            onClick={() => {
-              setMenuOpen(false);
-              setBookingOpen(true);
-            }}
-            className="mt-2 inline-block rounded-full bg-gold px-8 py-3 text-sm font-semibold text-black transition-all hover:bg-gold-light cursor-pointer"
-          >
-            Записаться
-          </button>
         </nav>
       </div>