/* How anything written to be read is set, on either site: the markdown's HTML inside a `.prose`
   element, styled by tag, so there is no class a writer has to remember. Five rules: one ink, a
   few sizes with weight doing the rest, blocks one line apart with headings closer to what they
   open, a column of readable measure (the site's to set), and a single hairline where a frame is
   needed. An ordered list is a run of steps (`system.css`, "numbered steps"). */

/* One ink for everything that is read: hierarchy comes from size and weight, never from a
   second grey. */
.prose {
	color: var(--color-grey-50);
	font-size: var(--font-size-medium);
	line-height: 1.6;
}

/* Every block is one line's worth of air from the next, so spacing groups nothing on its own and
   the headings do the grouping. */
.prose p,
.prose ul,
.prose figure,
.prose table,
.prose .code-block {
	margin: 0 0 1em;
}

/* Three times the air above as below, so a heading belongs to the section it opens. In the
   heading's own `em`: 40px over a 32px heading, 13px under it. */
.prose h2 {
	font-size: var(--font-size-title-medium);
	font-weight: 600;
	letter-spacing: -0.02em;
	line-height: 1.2;
	margin: 1.25em 0 0.4em;
	scroll-margin-top: 24px;
}

.prose h3 {
	font-size: var(--font-size-title-small);
	font-weight: 600;
	letter-spacing: -0.01em;
	line-height: 1.3;
	margin: 1.4em 0 0.35em;
	scroll-margin-top: 24px;
}

/* A link is the text with a faint underline, at the text's weight, so a paragraph full of links
   reads as a paragraph; the underline takes the accent when pointed at. */
.prose a {
	color: inherit;
	text-decoration: underline;
	text-decoration-color: rgb(255 255 255 / 0.35);
	text-underline-offset: 0.15em;
	transition: text-decoration-color 200ms;
}

.prose a:hover {
	text-decoration-color: var(--color-orange-400);
}

/* A button dropped into prose is a button, not a link: the underline would draw through it. */
.prose a.btn {
	text-decoration: none;
}

.prose a.btn-primary,
.prose a.btn-primary:hover {
	color: var(--color-grey-900);
}

.prose strong {
	font-weight: 600;
}

.prose em {
	font-style: italic;
}

.prose ul {
	list-style: disc;
	padding-left: 24px;
}

.prose li {
	margin: 0.25em 0;
}

.prose li::marker {
	color: var(--color-grey-500);
}

.prose blockquote {
	border-left: 2px solid var(--color-grey-600);
	color: var(--color-grey-300);
	margin: 1.5em 0;
	padding-left: 20px;
}

.prose hr {
	border: 0;
	border-top: 1px solid var(--hairline);
	margin: 3em 0;
}

/* A picture sits centred on its own line, the paragraph around it giving its spacing. */
.prose img {
	border: 1px solid var(--hairline);
	border-radius: 8px;
	display: block;
	height: auto;
	margin: 0 auto;
	max-width: 100%;
}

.prose figure {
	text-align: center;
}

/* A picture or a video is a pause in the reading, so it takes twice a paragraph's air on either
   side; kramdown wraps a lone image in a `p`, hence the `:has`. Under a heading it stays close:
   the heading is its title. */
.prose :is(figure, .video-frame, p:has(> img:only-child)) {
	margin: 2em 0;
}

.prose :is(h2, h3) + :is(figure, .video-frame, p:has(> img:only-child)) {
	margin-top: 0;
}

/* Inside a figure the figure has the air; what it holds sits just above its caption. */
.prose figure :is(img, .video-frame) {
	margin: 0 auto 10px;
}

.prose figcaption {
	color: var(--color-grey-400);
	font-size: var(--font-size-body);
}

/* `_includes/stream.html`'s box: a video is a block of its own, in prose or beside it. */
.video-frame {
	aspect-ratio: 16 / 9;
	border: 1px solid var(--hairline);
	border-radius: 8px;
	margin: 0 0 1em;
	overflow: hidden;
	position: relative;
}

.video-frame iframe {
	border: 0;
	height: 100%;
	left: 0;
	position: absolute;
	top: 0;
	width: 100%;
}

.prose table {
	border-collapse: collapse;
	display: block;
	font-size: var(--font-size-body);
	overflow-x: auto;
	width: 100%;
}

.prose th,
.prose td {
	border: 1px solid var(--hairline);
	padding: 8px 12px;
	text-align: left;
}

.prose th {
	background: var(--color-grey-800);
	color: var(--color-grey-50);
	font-weight: 600;
}

.prose code {
	background: var(--color-grey-800);
	border-radius: 4px;
	font-family: var(--font-mono);
	font-size: inherit;
	padding: 2px 6px;
}

/* Kramdown's own wrapper would carry the prose's paragraph spacing on top of the frame's, so the
   article's rhythm is set on the frame itself — everything else about it is `.code-block`. */
.prose .highlighter-rouge {
	margin: 0;
}

/* Kramdown puts a `code` inside the `pre`; the chrome for inline code must not reach it. */
.prose .code-block code {
	background: none;
	border-radius: 0;
	font: inherit;
	padding: 0;
}