html {
	scroll-behavior: smooth;
}

.bbo-toc {
	margin: 2rem 0 2.5rem;
	border: 1px solid #c9dbe7;
	border-left: 4px solid #087d9e;
	border-radius: 12px;
	background: #f6f9fc;
	box-shadow: 0 8px 24px rgba(7, 30, 55, 0.06);
	overflow: hidden;
}

.bbo-toc summary {
	position: relative;
	padding: 1.15rem 3.25rem 1.15rem 1.35rem;
	color: #0b2744;
	font-size: 1.15rem;
	font-weight: 700;
	cursor: pointer;
	list-style: none;
}

.bbo-toc summary::-webkit-details-marker {
	display: none;
}

.bbo-toc summary::before {
	content: "☷";
	display: inline-block;
	margin-right: 0.65rem;
	color: #087d9e;
	font-size: 1.15rem;
}

.bbo-toc summary::after {
	content: "⌄";
	position: absolute;
	top: 50%;
	right: 1.35rem;
	color: #087d9e;
	font-size: 1.3rem;
	transform: translateY(-55%) rotate(180deg);
	transition: transform 160ms ease;
}

.bbo-toc:not([open]) summary::after {
	transform: translateY(-45%);
}

.bbo-toc nav {
	padding: 0 1.35rem 1.35rem;
}

.bbo-toc ol {
	margin: 0;
	padding-left: 1.4rem;
}

.bbo-toc .bbo-toc-level-3 {
	margin-top: 0.45rem;
	padding-left: 1.35rem;
}

.bbo-toc li + li {
	margin-top: 0.45rem;
}

.bbo-toc a {
	color: #087d9e;
	text-decoration: none;
}

.bbo-toc a:hover,
.bbo-toc a:focus {
	color: #0b2744;
	text-decoration: underline;
	text-underline-offset: 3px;
}

.single-post h2[id],
.single-post h3[id] {
	scroll-margin-top: 6rem;
}

.bbo-related-reading {
	margin: 2.25rem 0;
	padding: 1.5rem 1.6rem;
	border: 1px solid #c9dbe7;
	border-left: 5px solid #0c7899;
	border-radius: 12px;
	background: #f3f8fb;
	box-shadow: 0 8px 24px rgba(7, 30, 55, 0.07);
}

.bbo-related-reading h2 {
	margin-top: 0;
	color: #0b2744;
}

.bbo-related-reading p {
	margin-bottom: 0.8rem;
}

.bbo-related-reading ul {
	margin: 0;
	padding-left: 1.25rem;
}

.bbo-related-reading li + li {
	margin-top: 0.65rem;
}

.bbo-related-reading a {
	color: #087d9e;
	text-decoration: underline;
	text-decoration-thickness: 1px;
	text-underline-offset: 3px;
}

.bbo-related-reading a:hover,
.bbo-related-reading a:focus {
	color: #0b2744;
}

.bbo-auto-inline-image {
	margin: 1.75rem auto 2.25rem;
	text-align: center;
}

.bbo-auto-inline-image img {
	display: block;
	width: 100%;
	max-width: 100%;
	height: auto;
	border-radius: 10px;
}

.bbo-image-caption,
.bbo-featured-image-with-caption figcaption {
	margin: 0.7rem auto 0;
	color: #65717d;
	font-size: 0.92rem;
	font-style: italic;
	line-height: 1.55;
	text-align: center;
}

.bbo-featured-image-with-caption {
	margin: 0;
}

.bbo-featured-image-with-caption img {
	display: block;
	width: 100%;
	max-width: 100%;
	height: auto;
}

@media (max-width: 640px) {
	.bbo-toc,
	.bbo-related-reading {
		margin: 1.5rem 0 2rem;
	}

	.bbo-toc summary,
	.bbo-toc nav,
	.bbo-related-reading {
		padding-left: 1rem;
		padding-right: 1rem;
	}
}