Style suff frontend mobile-first

Dark theme matching GOA palette, standalone microsite (no nav).
- Landing/login: GOA subhead + big "Suff" wordmark, large tap targets
- me page: 2-col 4:3 drink grid, bordered total box, day-grouped
  history with zebra rows, emoji empty-state
- Booking confirmation toast (amber, 5s, then 800ms CSS collapse)
- Touch feedback via :active scale, SVG beer favicon
- no_pin.html link-buttons styled

gaehsnitz/suff.py

@@ -166,12 +166,20 @@ def pin_view(request):
 def me_view(request):
     phase = _require_open(request)
     drinks = Drink.objects.order_by("name") if phase == "booking" else Drink.objects.none()
+    booked_drink = None
+    booked_id = request.GET.get("booked")
+    if booked_id:
+        try:
+            booked_drink = Drink.objects.get(pk=int(booked_id))
+        except (Drink.DoesNotExist, TypeError, ValueError):
+            booked_drink = None
     context = _tab_context(request.user)
     context.update(
         {
             "phase": phase,
             "drinks": drinks,
             "current_day": _current_festival_day(),
+            "booked_drink": booked_drink,
         }
     )
     return render(request, "suff/me.html", context)
@@ -197,7 +205,7 @@ def book_view(request):
         day=_current_festival_day(),
         for_free=False,
     )
-    return HttpResponseRedirect(reverse("suff:me"))
+    return HttpResponseRedirect(f"{reverse('suff:me')}?booked={drink.id}")
 
 
 @require_http_methods(["POST"])