How to center the video play icon?

Paste this css code below int the Codeixer > product gallery > Advanced settings > Custom CSS field

a.woocommerce-product-gallery__lightbox.wpgs-video {
    width: 100%;
    height: 100%;
    display: block;
    opacity: 1 !important;
  background:transparent;
  
}
a.woocommerce-product-gallery__lightbox.wpgs-video i {
    width: 100%;
    height: 100%;
    display: block;
    align-items: center;
    justify-content: center;
    display: flex;
    font-size: 80px;
    color: #fff;
  margin: 0 !important;
}
.wpgs-image .wpgs-video i:before {
  
    border-radius: 50%;
    padding-left: 10px;
    box-shadow: 0px 0px 10px 0px #fff;
}