article.blog-post img {
    max-width: 100%;
    height: auto;
}

/* Sidebar collapsible groups */
.sidebar-group > summary {
    cursor: pointer;
    list-style: none;
    padding-left: 0;
}
.sidebar-group > summary::-webkit-details-marker { display: none; }
.sidebar-group > summary::marker { display: none; }