openvk/Web/static/css/nsfw-posts.css

.post-nsfw .post-content img.media {
    filter: saturate(0.8) blur(15px);
}

.post-nsfw .post-content .attachment {
    overflow: hidden;
    position: relative;
}

.post-nsfw .post-content .attachment:active img.media {
    filter: none;
}

.post-nsfw .post-content .attachment::after {
    position: absolute;
    top: calc(50% - 16px);
    left: 0;
    width: 100%;
    padding: 8px 0;
    background-color: hsla(0, 0%, 0%, .5);
    color: #fff;
    text-align: center;
    content: attr(data-localized-nsfw-text);
}

.post-nsfw .post-content .attachment:active::after {
    display: none;
}