.zalo-float{
  position: fixed;
  left: 22px;
  bottom: 22px;
  z-index: 999999;
}

.zalo-float__link{
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 9999px;
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.15);
  box-shadow: 0 8px 30px rgba(0,0,0,0.4);
  transition: background .25s ease, transform .25s ease, box-shadow .25s ease;
  text-decoration: none;
}

.zalo-float__link:hover{
  background: rgba(255,255,255,0.18);
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 10px 24px rgba(0,0,0,0.18);
}

.zalo-float__icon{
  width: 26px;
  height: 26px;
  object-fit: contain;
  display: block;
}

.toTop-btn{
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 999998;

  display: none;
  align-items: center;
  justify-content: center;

  width: 48px;
  height: 48px;
  border-radius: 9999px;

  background: rgba(255,255,255,0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);

  border: 1px solid rgba(0,0,0,0.08);
  box-shadow: 0 6px 18px rgba(0,0,0,0.14);

  color: #111827;
  font-size: 18px;
  line-height: 1;

  transition: background .25s ease, color .25s ease, transform .25s ease, box-shadow .25s ease;
  cursor: pointer;
}

.toTop-btn.flex{
  display: flex;
}

.toTop-btn:hover{
  background: rgba(255,255,255,0.92);
  color: #2563eb;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0,0,0,0.18);
}

.toTop-btn i{
  pointer-events: none;
}

@media (max-width: 767px){
  .zalo-float{
    left: 16px;
    bottom: 16px;
  }

  .toTop-btn{
    right: 16px;
    bottom: 16px;
  }

  .zalo-float__link,
  .toTop-btn{
    width: 44px;
    height: 44px;
  }

  .zalo-float__icon{
    width: 24px;
    height: 24px;
  }

  .toTop-btn{
    font-size: 17px;
  }
}