#toc { padding:20px 36px; border:1px solid #eee; border-radius:8px; background:#fafafa; }
#toc .toc__title { font-weight:600; margin-bottom:8px; }
#toc ul { list-style: none; margin: 0; padding-left: 0; }
#toc li { margin: 4px 0; }
#toc a { text-decoration: none; color: #291935 }
#toc a:hover { text-decoration: underline; }
/* nested indentation via nesting (not padding “tabs” on the same list) */
#toc ul ul { margin-left: 16px; }

.blog-contents h2,
.blog-contents h3,
.blog-contents h4,
.blog-contents h5,
.blog-contents h6 {
  scroll-margin-top: 120px; /* anchor offset */
}