static/styles.css

.img-cover {
  height: 180px;
  object-fit: cover;
}

.article-content {
  line-height: 1.6;
}

.article-content img {
  max-width: 100%;
  height: auto;
  margin: 15px 0;
}

.article-content figure {
  max-width: 100%;
  margin: 15px 0;
}

.article-content iframe {
  max-width: 100%;
}

.article-content p {
  margin-bottom: 15px;
}

.article-content h1, .article-content h2, .article-content h3 {
  margin-top: 20px;
  margin-bottom: 15px;
}

.article-body img {
  max-width: 100%;
  height: auto;
}
.article-body figure {
  max-width: 100%;
}
.article-body iframe {
  max-width: 100%;
}