Center and Enlarge the Play Icon for Thumbnails

.sb-post-item .sb-post-item-play {

    bottom: 3rem;

    color: #fff;

    left: 50%;

   top: 50%;

   margin-left: -20px;

   margin-top: -20px;

    position: absolute

}

.sb-post-item .sb-post-item-play svg {

    height: 40px;

    width: 40px;

}