.push-bell {
  position: fixed; right: 14px; bottom: 14px; z-index: 2147483647;
  width: 44px; height: 44px; border-radius: 9999px;
  display: inline-flex; align-items: center; justify-content: center;
  background: #111827; color: #fff; border: 1px solid rgba(255,255,255,.08);
  box-shadow: 0 10px 20px rgba(0,0,0,.14); cursor: pointer; padding: 0;
}
.push-bell svg { width: 22px; height: 22px; display:block; }
.push-bell.is-on      { background:#065f46; }   /* subscribed */
.push-bell.is-blocked { background:#6b7280; }   /* permission=denied */