.pro-hidden,
   .pro-hidden-freepro {
       display: none;
   }

   .pro-toggle-container .toggle-pro-btn,
   .pro-toggle-container-freepro .toggle-freepro-btn {
       cursor: pointer;
       display: inline-flex;
       align-items: center;
       gap: 6px;
   }

   .pro-box-item .pro-wrapper {
       transition: all 0.4s ease;
   }




.overlay-learning {
  position: absolute;
  bottom: 8px;
  left: 8px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  padding: 4px 8px;
  font-weight: 600;
  border-radius: 4px;
  user-select: none;
  font-size: 14px;
  display: none; /* ẩn mặc định */
}

.overlay-learning.show {
  display: inline-block;
}

/* Hiệu ứng dấu chấm động */
.dots::after {
  content: '';
  animation: dots 1.5s steps(3, end) infinite;
  display: inline-block;
  width: 20px;
  text-align: left;
}

@keyframes dots {
  0%   { content: ''; }
  33%  { content: '.'; }
  66%  { content: '..'; }
  100% { content: '...'; }
}