.mask {
      z-index: 99;
      width: 250px;
      height: 209px;
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      }

      @media (max-width: 768px) {
      .mask {
      width: 150px;
      height: 125px;    
      }
      }

      @media (max-width: 480px) {
      .mask {
      width: 150px;
      height: 125px;    
      }
      }

img {
      -webkit-user-drag: none;
      user-drag: none;         
      -webkit-user-select: none;
      -moz-user-select: none;    
      -ms-user-select: none;    
      user-select: none;        
      }