/* Nút liên hệ Telegram - Dạng tròn, nhấp nháy */
.telegram-contact {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1000;
  background: linear-gradient(135deg, #2aabee, #229ed9);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 50px;        /* bo tròn nhiều hơn */
  text-decoration: none;
  font-size: 13px;
  font-weight: bold;
  font-family: inherit;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  transition: all 0.3s ease;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255,255,255,0.2);
  /* Hiệu ứng nhấp nháy */
  animation: blinkTele 1.2s infinite alternate;
}

/* Hiệu ứng nhấp nháy */
@keyframes blinkTele {
  0% {
    background: linear-gradient(135deg, #2aabee, #229ed9);
    box-shadow: 0 0 5px rgba(42, 171, 238, 0.5);
    transform: scale(1);
  }
  100% {
    background: linear-gradient(135deg, #50c4f5, #2aabee);
    box-shadow: 0 0 15px #2aabee, 0 0 5px #229ed9;
    transform: scale(1.02);
  }
}

.telegram-contact:hover {
  animation: none;
  transform: scale(1.05);
  background: linear-gradient(135deg, #1e8bc4, #1b7aaa);
  box-shadow: 0 6px 16px rgba(0,0,0,0.4);
}

/* Responsive trên mobile */
@media (max-width: 480px) {
  .telegram-contact {
    padding: 6px 12px;
    font-size: 11px;
    gap: 4px;
  }
  .telegram-contact svg {
    width: 18px;
    height: 18px;
  }
}