.social-chat-legacy,
[class*="fixed"][class*="bottom-4"][class*="right-4"]:has(> a[href^="https://zalo.me/"]):has(> a[href^="https://wa.me/"]) {
  display: none !important;
}
.social-chat {
  position: fixed;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-end;
}
.social-chat .social-chat__link {
  box-sizing: border-box;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  padding: 0;
  border: 2px solid rgba(255,255,255,.9);
  border-radius: 50%;
  box-shadow: 0 5px 18px rgba(0,0,0,.42);
  color: #fff !important;
  text-decoration: none !important;
  transition: transform .18s ease, box-shadow .18s ease;
}
.social-chat .social-chat__link:hover,
.social-chat .social-chat__link:focus-visible {
  transform: translateY(-2px) scale(1.06);
  box-shadow: 0 8px 22px rgba(0,0,0,.55);
}
.social-chat .social-chat__link:focus-visible {
  outline: 3px solid #f5c864;
  outline-offset: 3px;
}
.social-chat__link--whatsapp { background: #25d366; }
.social-chat__link--zalo { background: #0068ff; }
.social-chat__link--messenger { background: #0084ff; }
.social-chat .social-chat__link svg {
  display: block;
  width: 27px;
  height: 27px;
}
.social-chat__zalo-mark {
  font: 800 15px/1 Arial, sans-serif;
  letter-spacing: -.06em;
}
.social-chat__label {
  position: absolute;
  top: 50%;
  right: calc(100% + 11px);
  transform: translate(5px,-50%);
  padding: 7px 10px;
  border-radius: 5px;
  background: #181818;
  box-shadow: 0 3px 12px rgba(0,0,0,.4);
  color: #fff;
  font: 600 12px/1.2 Arial, sans-serif;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
}
.social-chat__link:hover .social-chat__label,
.social-chat__link:focus-visible .social-chat__label {
  opacity: 1;
  transform: translate(0,-50%);
}
@media (max-width: 600px) {
  .social-chat { right: max(12px, env(safe-area-inset-right)); bottom: max(12px, env(safe-area-inset-bottom)); gap: 8px; }
  .social-chat .social-chat__link { width: 48px; height: 48px; }
  .social-chat .social-chat__link svg { width: 24px; height: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  .social-chat .social-chat__link,
  .social-chat__label { transition: none; }
}