.ui-dialog-titlebar-close {
  position: absolute;
  top: 0.4rem;
  right: 0.6rem;
  width: 1.5rem;
  height: 1.5rem;
  background: transparent;
  border: 1px solid #ccc;
  border-radius: 4px;
  color: #444;
  cursor: pointer;
  opacity: 0.8;
  display: flex;
  align-items: center;     
  justify-content: center; 
  padding: 0;
  font-size: 0;            
}

.ui-dialog-titlebar-close:hover {
  opacity: 1;
  border-color: #999;
  color: #000;
}

.ui-dialog-titlebar-close::before {
  content: '✖';
  font-size: 0.9rem;       /* Controls icon size */
  line-height: 1;
  display: block;
  transform: translateY(1px);  
}