.con-mosaic-puff {
   position: relative;
}

.con-mosaic-puff__link {
   display: block;
   text-decoration: none;
}

.con-mosaic-puff__link:after {
   content: '';
   position: absolute;
   top:0;
   right: 0;
   left: 0;
   bottom: 0;
}

.con-mosaic-puff__link:hover,
.con-mosaic-puff__link:focus {
   text-decoration: underline;
}