.core-media-unknown{border-color:red}.core-media-unknown>p{color:red;padding:2rem 1rem;text-transform:uppercase}.skeleton{background-color:var( --color-skeleton )}.skeleton:before{animation:wave-skeleton 2s ease-out infinite alternate;background:var( --color-skeleton-wave );content:"";height:100%;left:0;position:absolute;top:0;width:100%}@keyframes wave-skeleton{0%{opacity:.1}to{opacity:.5}}