/* Blog post (single.php), book p07, p17: header + banner across the article width, then a sticky table of contents
   (desktop) next to a 72ch reading column. Rich text: headings, lists, tables, quotes, images, code (IBM Plex Mono),
   callouts, FAQ (base .accordion). Cards, avatars, crumbs: blog.css. Royal Original tokens only. */

.post {
	--toc-w: clamp(220px, 20vw, 300px);
	--col-gap: clamp(32px, 4vw, 72px);
	--read: 72ch;
	--post-w: var(--read);
	--toc-top: calc(var(--header-height) + 24px); /* scripts/single.js sets the real header bottom (admin bar, zoom) */
	display: grid; gap: var(--space-6);
	padding: var(--space-6) var(--page-inline) var(--section-padding);
}
.post > * { width: min(100%, var(--post-w)); margin-inline: auto; min-width: 0; }
@media (min-width: 1024px) { .post--toc { --post-w: calc(var(--toc-w) + var(--col-gap) + var(--read)); } }

/* Header */
.post-head { display: grid; justify-items: start; gap: var(--space-4); }
.post-head__cat { text-decoration: none; min-height: 44px; display: inline-flex; align-items: center; margin-bottom: calc(var(--space-2) * -1); }
@media (hover: hover) { .post-head__cat:hover { color: var(--color-primary-hover); text-decoration: underline; } }
.post-head__title { max-width: var(--measure-heading); }

.post-meta { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2) var(--space-3); color: var(--color-text-muted); }
.post-meta__author { display: inline-flex; align-items: center; gap: var(--space-3); color: var(--color-text); }
.post-meta__author strong { font-weight: var(--font-weight-label); }
.post-meta__author-link { font-weight: var(--font-weight-label); }
.post-meta > * + *::before { content: '\00B7'; margin-right: var(--space-3); color: var(--color-text-muted); }

/* Banner, 2059 / 1413 */
.post-cover { aspect-ratio: var(--banner-ratio); overflow: hidden; border-radius: var(--radius-card); border: 1px solid var(--color-border); background: var(--color-surface-tint); }
.post-cover__img { width: 100%; height: 100%; object-fit: cover; }

/* Layout. Mobile: "Table of contents" (folded), article. Desktop (1024+): TOC column stays in view under the header. */
.post-layout { display: grid; gap: var(--space-6); }
.post-toc, .post-main { min-width: 0; }
.post-main { max-width: var(--read); }
@media (min-width: 1024px) {
	.post--toc .post-layout { grid-template-columns: var(--toc-w) minmax(0, var(--read)); column-gap: var(--col-gap); align-items: start; }
	.post--toc .post-toc { align-self: stretch; }
	.post--toc .post-toc .toc {
		position: sticky; top: var(--toc-top);
		max-height: calc(100vh - var(--toc-top) - 24px); overflow-y: auto; overscroll-behavior: contain;
	}
}

.toc { border: 1px solid var(--color-control-border); border-radius: var(--radius-card); background: var(--color-surface); }
.toc__title {
	list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
	min-height: 56px; padding: 0 var(--space-4); font-size: 18px; font-weight: var(--font-weight-label); color: var(--color-text);
}
.toc__title::-webkit-details-marker { display: none; }
.toc__title::after {
	content: ''; flex: none; width: 10px; height: 10px; margin-right: 6px;
	border-right: 1.75px solid currentColor; border-bottom: 1.75px solid currentColor; transform: translateY(-3px) rotate(45deg);
}
.toc[open] .toc__title::after { transform: translateY(2px) rotate(-135deg); }
.toc__list { display: grid; gap: var(--space-1); padding: 0 var(--space-2) var(--space-3); }
.toc__item a {
	display: flex; align-items: center; min-height: 44px; padding: var(--space-2) var(--space-3);
	border-left: 2px solid transparent; color: var(--color-text-muted); line-height: var(--line-height-small); text-decoration: none;
}
.toc__item--h3 a { padding-left: var(--space-6); }
@media (hover: hover) { .toc__item a:hover { color: var(--color-text); text-decoration: underline; } }
.toc__item a.is-active { color: var(--color-primary); border-left-color: var(--color-primary); }

@media (min-width: 1024px) {
	.toc { border: 0; border-radius: 0; background: none; }
	.toc__title { cursor: default; min-height: 0; padding: 0 var(--space-3) var(--space-3); font-size: var(--font-size-label); }
	.toc__title::after { content: none; }
	.toc__list { padding: 0; }
}

/* Article typography: 18px body, 72ch column. */
.post-content { font-size: 18px; line-height: 1.7; overflow-wrap: break-word; }
.post-content > * + * { margin-top: 1.1em; }
.post-content :is(h2, h3, h4) { scroll-margin-top: calc(var(--header-height) + 24px); }
.post-content h2 { margin-top: 2em; font-size: var(--font-size-h3); font-weight: var(--font-weight-h3); line-height: var(--line-height-h3); letter-spacing: var(--letter-spacing-h3); }
.post-content h3 { margin-top: 1.6em; font-size: var(--font-size-h4); font-weight: var(--font-weight-h4); line-height: var(--line-height-h4); letter-spacing: var(--letter-spacing-h4); }
.post-content h4 { margin-top: 1.4em; font-size: 18px; font-weight: 600; line-height: 1.35; letter-spacing: 0; }
.post-content :is(h2, h3, h4) + * { margin-top: .6em; }
.post-content > :first-child { margin-top: 0; }

.post-content :is(ul, ol) { padding-left: 1.4em; }
.post-content li + li { margin-top: .4em; }
.post-content li::marker { color: var(--color-primary); }
.post-content li > :is(ul, ol) { margin-top: .4em; }

.post-content img { height: auto; border-radius: var(--radius-card); }
.post-content :is(p, a) > img, .post-content > img, .post-content .aligncenter { display: block; margin-inline: auto; }
.post-content :is(figure, .wp-caption) { max-width: 100%; }
.post-content :is(figcaption, .wp-caption-text) { margin-top: .6em; font-size: var(--font-size-small); line-height: var(--line-height-small); color: var(--color-text-muted); text-align: center; }

.post-content blockquote { padding: var(--space-1) 0 var(--space-1) var(--space-5); border-left: 2px solid var(--color-primary); font-size: var(--font-size-lead); line-height: var(--line-height-lead); }
.post-content blockquote > * + * { margin-top: .6em; }
.post-content blockquote cite { display: block; font-size: var(--font-size-small); font-style: normal; color: var(--color-text-muted); }

/* Code: IBM Plex Mono, code panel 4px radius + 1px border (book p09). */
.post-content code { font-size: .9em; padding: .1em .35em; border-radius: var(--radius-tooltip); background: var(--color-surface-tint); border: 1px solid var(--color-border); }
.post-content pre { overflow-x: auto; padding: var(--space-4) var(--space-5); border-radius: var(--radius-canvas); border: 1px solid var(--color-border); background: var(--color-surface-tint); font-size: 15px; }
.post-content pre code { padding: 0; border: 0; background: none; font-size: inherit; }
.post-content hr { border: 0; border-top: 1px solid var(--color-border); margin-block: 2em; }

/* Callouts: <div class="callout"> (or note / tip / warning) in the post text. */
.post-content :is(.callout, .note, .tip) { padding: var(--space-4) var(--space-5); border-radius: var(--radius-card); background: var(--color-info-bg); color: var(--color-info); }
.post-content .warning { padding: var(--space-4) var(--space-5); border-radius: var(--radius-card); background: var(--color-warning-bg); color: var(--color-warning); }
.post-content :is(.callout, .note, .tip, .warning) > * + * { margin-top: .5em; }

/* Tables: scroll box, tinted header row. */
.table-scroll { overflow-x: auto; border: 1px solid var(--color-border); border-radius: var(--radius-card); -webkit-overflow-scrolling: touch; }
.post-content table { width: 100%; min-width: 520px; border-collapse: collapse; font-size: 16px; line-height: var(--line-height-small); }
.post-content :is(th, td) { padding: var(--space-3) var(--space-4); text-align: left; vertical-align: top; border-bottom: 1px solid var(--color-border); }
.post-content :is(thead th, tr:first-child th) { background: var(--color-surface-tint); font-weight: 600; }
.post-content tbody tr:last-child td { border-bottom: 0; }

/* Article FAQ: base accordion */
.post-content .post-faq { margin-top: var(--space-5); }
.post-content .post-faq__answer { font-size: var(--font-size-body); }
.post-faq__answer > * + * { margin-top: .75em; }
.post-faq__answer :is(ul, ol) { padding-left: 1.25em; }

/* Author box + share */
.post-foot { display: grid; gap: var(--space-6); margin-top: var(--space-8); padding-top: var(--space-6); border-top: 1px solid var(--color-border); }
.author-box { display: flex; gap: var(--space-4); align-items: flex-start; padding: var(--space-5); background: var(--color-surface-tint); border-radius: var(--radius-modal); }
.author-box__body { min-width: 0; }
.author-box__label { color: var(--color-text-muted); }
.author-box__name { font-size: var(--font-size-h4); font-weight: var(--font-weight-h4); line-height: var(--line-height-h4); letter-spacing: var(--letter-spacing-h4); }
.author-box__name a { color: var(--color-text); text-decoration: none; }
@media (hover: hover) { .author-box__name a:hover { text-decoration: underline; } }
.author-box__title { color: var(--color-text-muted); }
.author-box__bio { display: grid; gap: var(--space-3); margin-top: var(--space-3); }
.author-box__more { display: inline-flex; align-items: center; gap: var(--space-2); min-height: 44px; margin-top: var(--space-2); font-weight: var(--font-weight-label); }
.author-box__more .icon { width: 20px; height: 20px; }

.share { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3) var(--space-4); }
.share__label { font-weight: var(--font-weight-label); }
.share__list { display: flex; flex-wrap: wrap; gap: var(--space-2); }

/* Related articles: tinted full-width band (3 cards; blog.css hides the 3rd at 2 columns). */
.related { display: grid; gap: var(--space-6); padding: var(--section-padding) var(--page-inline); background: var(--color-surface-tint); }
.related__head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-4); }
.related .post-card__media { background: var(--color-surface); }

/* Template CTA: full-width blue band */
.post-cta {
	display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-5);
	padding: var(--section-padding) var(--page-inline);
}
.post-cta__text { display: grid; gap: var(--space-4); }
.post-cta__text p { max-width: 60ch; font-size: var(--font-size-lead); line-height: var(--line-height-lead); }

@media (max-width: 639px) { .post-crumbs li:last-child { display: none; } }

/* Byline: no dot right after the author (the author sits on its own line on phones). */
.post-meta__author + *::before { content: none; }
@media (max-width: 767px) { .post-meta__author { flex-basis: 100%; } }
@media (min-width: 768px) { .post-meta__author { margin-right: var(--space-3); } }