/* Blog, article, timeline and topic pages. Builds on /landing/styles.css (tokens, header, glass, backdrop). */

:root { --amb: #b45309; --blu: #2563eb; --code-bg: #f6f8fa; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --amb: #fbbf24; --blu: #60a5fa; --code-bg: #0b0e13; } }
:root[data-theme="dark"] { --amb: #fbbf24; --blu: #60a5fa; --code-bg: #0b0e13; }

/* Topic colours: each category gets its own accent. New categories fall back to teal. */
[data-cat] { --c: var(--sig); }
[data-cat="security"] { --c: var(--hdr); }
[data-cat="cryptography"] { --c: var(--pay); }
[data-cat="iam"] { --c: var(--sig); }
[data-cat="database"] { --c: var(--amb); }
[data-cat="operating-system"] { --c: var(--blu); }

.blog, .article-wrap, .timeline-wrap, .lost { position: relative; z-index: 1; }
a { text-underline-offset: 3px; }
kbd { font-family: var(--mono); font-size: 11px; line-height: 1; padding: 3px 6px; border-radius: 6px; border: 1px solid var(--glass-line); background: color-mix(in srgb, var(--sunk) 60%, transparent); color: var(--muted); }
mark { background: color-mix(in srgb, var(--pay) 28%, transparent); color: inherit; border-radius: 3px; padding: 0 2px; }

/* Header pieces specific to these pages */
.nav .nav-out[aria-current] { border-color: color-mix(in srgb, var(--sig) 55%, var(--glass-line)); color: var(--sig); }
.search-trigger { display: inline-flex; align-items: center; gap: 8px; padding: 6px 8px 6px 12px; border-radius: 999px; font-family: var(--mono); font-size: 12px; color: var(--muted);
  background: var(--glass-fill); border: 1px solid var(--glass-line); box-shadow: var(--glass-hl); transition: color 160ms, border-color 160ms; }
.search-trigger:hover { color: var(--ink); border-color: color-mix(in srgb, var(--sig) 50%, var(--glass-line)); }
.progress { position: fixed; inset: 0 0 auto; height: 3px; z-index: 60; transform-origin: 0 50%; transform: scaleX(var(--p, 0)); background: linear-gradient(90deg, var(--hdr), var(--pay), var(--sig)); pointer-events: none; }
body:not(.article-page) .progress { display: none; }
.foot-links { display: inline-flex; gap: 14px; }
.foot-links a { color: var(--muted); text-decoration: none; }
.foot-links a:hover { color: var(--ink); }

/* ── Blog index ─────────────────────────────────────────────── */
.blog { padding-bottom: clamp(56px, 8vw, 104px); }
.blog-hero { padding-block: clamp(40px, 7vw, 88px) clamp(20px, 3vw, 32px); }
.blog-hero.compact { padding-bottom: 8px; }
.blog-hero h1 { font-family: var(--display); font-weight: 800; font-size: clamp(40px, 7vw, 92px); line-height: .95; letter-spacing: -.04em; margin: 14px 0 20px; max-width: 16ch; text-wrap: balance; }
.blog-hero h1 span { color: var(--muted); }
.blog-hero .lede { color: var(--muted); font-size: 18px; max-width: 60ch; margin: 0; }
.stats { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0 0; padding: 0; }
.stats li { font-family: var(--mono); font-size: 12px; color: var(--muted); padding: 6px 12px; border-radius: 999px; background: var(--glass-fill); border: 1px solid var(--glass-line); box-shadow: var(--glass-hl); }
.stats b { color: var(--ink); font-weight: 500; }
/* Topics and tags in the stats row are links to their indexes. */
.stats li:has(> a) { padding: 0; transition: border-color 160ms; }
.stats li > a { display: block; padding: 6px 12px; border-radius: inherit; color: inherit; text-decoration: none; }
.stats li > a span { color: var(--sig); }
.stats li:has(> a):hover { border-color: color-mix(in srgb, var(--sig) 55%, var(--glass-line)); }
.stats li:has(> a):hover, .stats li > a:focus-visible { color: var(--ink); }
/* All posts · Topics · Tags, on the taxonomy pages */
.tax-tabs { display: inline-flex; flex-wrap: wrap; gap: 4px; margin-top: 22px; padding: 4px; border-radius: 999px; background: var(--glass-fill); border: 1px solid var(--glass-line); box-shadow: var(--glass-hl); }
.tax-tabs a { display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 999px; font-family: var(--mono); font-size: 12.5px; color: var(--muted); text-decoration: none; transition: color 160ms, background 160ms; }
.tax-tabs a span { font-size: 11px; color: var(--faint); }
.tax-tabs a:hover { color: var(--ink); }
.tax-tabs a[aria-current] { color: var(--ink); background: color-mix(in srgb, var(--ink) 9%, transparent); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 24px 0 0; }
.crumbs { margin: 0; font-family: var(--mono); font-size: 12px; color: var(--faint); display: flex; gap: 8px; flex-wrap: wrap; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--ink); }
.crumbs .cat { color: var(--c); }

/* Search + topics, pinned under the header while scrolling the list */
.finder { position: sticky; top: 61px; z-index: 10; margin: 0 calc(-1 * var(--gutter)) 24px; padding: 12px var(--gutter); background: var(--glass-bar); -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur); border-bottom: 1px solid transparent; transition: border-color 200ms; }
.finder.stuck { border-bottom-color: var(--glass-line); }
.finder-search { display: flex; align-items: center; gap: 12px; padding: 13px 16px; border-radius: 16px; color: var(--muted); background: var(--glass-fill); border: 1px solid var(--glass-line); box-shadow: var(--glass-hl), var(--glass-drop); transition: border-color 160ms, box-shadow 160ms; }
.finder-search:focus-within { border-color: color-mix(in srgb, var(--sig) 60%, var(--glass-line)); box-shadow: var(--glass-hl), 0 0 0 4px color-mix(in srgb, var(--sig) 15%, transparent); }
.finder-search input { flex: 1; min-width: 0; border: 0; outline: 0; background: none; font: inherit; font-size: 17px; color: var(--ink); }
.finder-search input::placeholder { color: var(--faint); }
.finder-search input::-webkit-search-cancel-button { filter: grayscale(1); }
.topics { display: flex; gap: 8px; margin-top: 12px; overflow-x: auto; scrollbar-width: none; }
.topic { flex: none; display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 999px; font-family: var(--mono); font-size: 12.5px; color: var(--muted); background: var(--glass-fill); border: 1px solid var(--glass-line); box-shadow: var(--glass-hl); transition: color 160ms, border-color 160ms, background 160ms; }
.topic span { font-size: 11px; color: var(--faint); }
.topic:hover { color: var(--ink); }
.topic[aria-pressed="true"] { color: var(--c, var(--ink)); border-color: color-mix(in srgb, var(--c, var(--ink)) 50%, var(--glass-line)); background: linear-gradient(155deg, color-mix(in srgb, var(--c, var(--ink)) 14%, transparent), transparent), var(--glass-fill); }
.topic[data-topic=""] { --c: var(--ink); }
/* keerthivibisan.com / posts: the site name links home. */
.label.crumb a { color: var(--muted); text-decoration: none; transition: color 160ms; }
.label.crumb a:hover { color: var(--sig); }
.result-note { margin: 0 0 16px; font-family: var(--mono); font-size: 12px; color: var(--muted); }

/* Post cards */
.post-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.post-grid.compact { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.post-card { position: relative; border-radius: 20px; overflow: hidden; background: var(--glass-fill); border: 1px solid var(--glass-line); box-shadow: var(--glass-hl);
  transition: transform 350ms var(--ease), border-color 250ms, box-shadow 350ms var(--ease); }
.post-card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--c) 55%, var(--glass-line)); box-shadow: var(--glass-hl), 0 30px 60px -34px color-mix(in srgb, var(--c) 70%, transparent); }
.post-card.enter { animation: card-in 420ms var(--ease) both; }
@keyframes card-in { from { opacity: 0; transform: translateY(10px) scale(.985); } }
.post-link { display: flex; flex-direction: column; height: 100%; color: inherit; text-decoration: none; }
.cover { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background:
  radial-gradient(120% 90% at 0% 0%, color-mix(in srgb, var(--c) 35%, transparent), transparent 60%),
  radial-gradient(90% 90% at 100% 100%, color-mix(in srgb, var(--pay) 22%, transparent), transparent 60%), var(--sunk); }
.cover img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform 700ms var(--ease); }
.post-card:hover .cover img { transform: scale(1.04); }
.cover-glyph { position: absolute; inset: 0; display: grid; place-items: center; padding: 16px; text-align: center; font-family: var(--display); font-weight: 800; font-size: clamp(28px, 4vw, 44px); letter-spacing: -.03em; line-height: 1;
  color: color-mix(in srgb, var(--c) 75%, var(--ink)); opacity: .85;
  background-image: linear-gradient(var(--glass-line) 1px, transparent 1px), linear-gradient(90deg, var(--glass-line) 1px, transparent 1px); background-size: 28px 28px; }
.badge-new { position: absolute; top: 12px; left: 12px; z-index: 2; display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px; font-family: var(--mono); font-size: 11px; color: var(--ink);
  background: var(--glass-fill); border: 1px solid var(--glass-line); -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur); }
.badge-new::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--sig); box-shadow: 0 0 0 3px color-mix(in srgb, var(--sig) 25%, transparent); }
.post-body { flex: 1; display: flex; flex-direction: column; gap: 8px; padding: 18px 20px 22px; }
.post-meta { display: flex; flex-wrap: wrap; gap: 4px 14px; margin: 0; font-family: var(--mono); font-size: 12px; color: var(--faint); }
.post-meta .cat { color: var(--c); }
.post-card h3 { margin: 0; font-family: var(--display); font-weight: 700; font-size: 22px; letter-spacing: -.02em; line-height: 1.15; text-wrap: balance; }
.post-card .summary { margin: 0; color: var(--muted); font-size: 15px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.read-more { margin-top: auto; padding-top: 6px; font-family: var(--mono); font-size: 12px; color: var(--c); }
.read-more span { display: inline-block; transition: transform 250ms var(--ease); }
.post-card:hover .read-more span { transform: translateX(4px); }
/* The newest post leads, larger and side by side */
.post-card.featured { grid-column: 1 / -1; }
.post-card.featured .post-link { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); }
.post-card.featured .cover { aspect-ratio: auto; min-height: 340px; }
.post-card.featured .post-body { justify-content: center; padding: clamp(24px, 4vw, 44px); gap: 12px; }
.post-card.featured h3 { font-size: clamp(28px, 3.6vw, 44px); line-height: 1.05; }
.post-card.featured .summary { font-size: 16.5px; -webkit-line-clamp: 4; }
.post-card.featured .read-more { margin-top: 8px; }
/* /posts/ pagination (blog.js): ← Newer · 1 2 · Older → */
.pages { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px; margin: 32px 0 8px; }
.pages .nums { display: inline-flex; gap: 4px; padding: 4px; border-radius: 999px; background: var(--glass-fill); border: 1px solid var(--glass-line); box-shadow: var(--glass-hl); }
.pages button { font-family: var(--mono); font-size: 12.5px; color: var(--muted); border-radius: 999px; transition: color 160ms, background 160ms, border-color 160ms; }
.pages .nums button { min-width: 34px; padding: 6px 10px; border: 0; background: none; }
.pages .step { padding: 8px 16px; background: var(--glass-fill); border: 1px solid var(--glass-line); box-shadow: var(--glass-hl); }
.pages button:hover:not(:disabled) { color: var(--ink); }
.pages .step:hover:not(:disabled) { border-color: color-mix(in srgb, var(--sig) 55%, var(--glass-line)); }
.pages button[aria-current] { color: var(--ink); background: color-mix(in srgb, var(--ink) 10%, transparent); cursor: default; }
.pages button:disabled { opacity: .35; cursor: default; }
.pages-note { flex-basis: 100%; margin: 4px 0 0; text-align: center; font-family: var(--mono); font-size: 11px; color: var(--faint); }
.empty { text-align: center; padding: 48px 0 24px; color: var(--muted); }
.empty-code { margin: 0; font-family: var(--display); font-weight: 800; font-size: 88px; letter-spacing: -.04em; line-height: 1; background: linear-gradient(90deg, var(--hdr), var(--pay), var(--sig)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.back { margin: 40px 0 0; font-family: var(--mono); font-size: 13px; }
.back a { color: var(--muted); text-decoration: none; }
.back a:hover { color: var(--ink); }

/* Topic index (/categories/) */
.topic-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; margin-top: 24px; }
.topic-card { display: grid; gap: 6px; padding: 22px; border-radius: 20px; text-decoration: none; color: inherit; background: linear-gradient(155deg, color-mix(in srgb, var(--c) 14%, transparent), transparent 60%), var(--glass-fill);
  border: 1px solid var(--glass-line); box-shadow: var(--glass-hl); transition: transform 300ms var(--ease), border-color 200ms; }
.topic-card:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--c) 55%, var(--glass-line)); }
.topic-card .count { font-family: var(--display); font-weight: 800; font-size: 44px; line-height: 1; color: var(--c); }
.topic-card b { font-family: var(--display); font-size: 22px; letter-spacing: -.02em; }
.topic-card .latest { font-size: 13px; color: var(--muted); }

/* ── Article ────────────────────────────────────────────────── */
.article-wrap { display: grid; grid-template-columns: minmax(0, 740px); justify-content: center; gap: 64px; padding-bottom: clamp(56px, 8vw, 104px); }
.article-wrap.has-toc { grid-template-columns: minmax(0, 740px) 230px; }
.article-head { padding-top: clamp(32px, 6vw, 72px); }
.article-head h1 { font-family: var(--display); font-weight: 800; font-size: clamp(36px, 5.6vw, 64px); line-height: 1.02; letter-spacing: -.035em; margin: 16px 0 18px; text-wrap: balance; }
.article-meta { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 0; font-family: var(--mono); font-size: 12.5px; color: var(--faint); }
.article-meta time { color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0; }
.tags a { font-family: var(--mono); font-size: 12px; color: var(--c); text-decoration: none; padding: 3px 10px; border-radius: 999px; border: 1px solid color-mix(in srgb, var(--c) 35%, var(--glass-line)); }
.article .tags a:hover { background: color-mix(in srgb, var(--c) 10%, transparent); }
.article-head::after { content: ''; display: block; height: 1px; margin-top: 28px; background: linear-gradient(90deg, var(--c), color-mix(in srgb, var(--c) 0%, transparent)); opacity: .6; }

/* Reading typography */
.prose { font-size: 18px; line-height: 1.75; color: var(--ink); overflow-wrap: break-word; }
.prose > :first-child { margin-top: 28px; }
.prose p { margin: 1.1em 0; }
.prose h1, .prose h2, .prose h3, .prose h4 { font-family: var(--display); letter-spacing: -.02em; line-height: 1.2; scroll-margin-top: 84px; }
/* Posts written with # headings: a step above h2, not the paragraph line height. */
.prose h1 { font-size: clamp(29px, 3.4vw, 36px); margin: 2em 0 .6em; }
.prose h2 { font-size: clamp(26px, 3vw, 32px); margin: 2.1em 0 .6em; }
.prose h3 { font-size: clamp(21px, 2.4vw, 24px); margin: 1.8em 0 .5em; }
.prose h4 { font-size: 19px; margin: 1.6em 0 .4em; }
/* Zero-width, so the hidden # never wraps onto a line of its own under a long heading. */
.prose .permalink { display: inline-block; width: 0; white-space: nowrap; color: var(--faint); opacity: 0; transition: opacity 160ms; vertical-align: middle; }
.prose .permalink svg { margin-left: 8px; }
.prose .permalink svg { width: 18px; height: 18px; }
.prose :is(h1, h2, h3, h4):hover .permalink, .prose .permalink:focus-visible { opacity: 1; }
.prose a:not(.permalink) { color: var(--sig); text-decoration-color: color-mix(in srgb, var(--sig) 40%, transparent); }
.prose a:not(.permalink):hover { text-decoration-color: var(--sig); }
.prose strong, .prose b { font-weight: 650; }
.prose ul, .prose ol { padding-left: 1.3em; margin: 1em 0; }
.prose li { margin: .35em 0; }
.prose li::marker { color: var(--c); }
.prose blockquote:not([class]) { margin: 1.6em 0; padding: 2px 0 2px 20px; border-left: 3px solid var(--c); color: var(--muted); }
.prose hr { border: 0; height: 1px; margin: 3em 0; background: linear-gradient(90deg, transparent, var(--glass-line), transparent); }
.prose :not(pre) > code { font-family: var(--mono); font-size: .86em; padding: .15em .42em; border-radius: 6px; background: color-mix(in srgb, var(--sunk) 75%, transparent); border: 1px solid var(--glass-line); }
.prose img { display: block; max-width: 100%; height: auto; margin: 1.6em auto; border-radius: 14px; border: 1px solid var(--glass-line); background: #fff; }
.prose picture { display: block; margin: 0 auto; }
.prose figure { margin: 1.8em 0; }
.prose figure img { margin-bottom: 0; }
.prose figcaption { margin-top: 10px; text-align: center; font-family: var(--mono); font-size: 12.5px; color: var(--faint); }
.prose table { display: block; overflow-x: auto; width: 100%; border-collapse: collapse; margin: 1.6em 0; font-size: 15px; }
.prose th, .prose td { padding: 10px 14px; border-bottom: 1px solid var(--glass-line); text-align: left; vertical-align: top; }
.prose th { font-family: var(--mono); font-size: 12px; font-weight: 500; color: var(--muted); }
.prose lite-youtube, .prose iframe { display: block; margin: 1.6em 0; border-radius: 14px; overflow: hidden; max-width: 100%; }
.prose details { margin: 1.4em 0; padding: 12px 16px; border-radius: 14px; background: var(--glass-fill); border: 1px solid var(--glass-line); }
.prose details > summary { cursor: pointer; font-weight: 500; }
/* Code blocks: Hugo's highlighter output, plus a language label and copy button from blog.js */
.prose .highlight, .prose > pre { position: relative; margin: 1.7em 0; border-radius: 14px; background: var(--code-bg); border: 1px solid var(--glass-line); overflow: hidden; }
.prose pre { margin: 0; padding: 18px 20px; overflow-x: auto; font-family: var(--mono); font-size: 14px; line-height: 1.65; tab-size: 2; }
.prose .highlight pre { background: none !important; }
.prose .highlight.has-tools pre { padding-top: 40px; }
.code-tools { position: absolute; top: 8px; left: 14px; right: 8px; display: flex; justify-content: space-between; align-items: center; pointer-events: none; }
.code-lang { font-family: var(--mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--faint); }
.copy-code { pointer-events: auto; font-family: var(--mono); font-size: 11px; padding: 4px 9px; border-radius: 8px; color: var(--muted); background: var(--glass-fill); border: 1px solid var(--glass-line); opacity: .75; transition: opacity 160ms, color 160ms; }
.copy-code:hover, .copy-code:focus-visible { opacity: 1; color: var(--ink); }
.copy-code.done { color: var(--sig); opacity: 1; }

/* Table of contents */
.toc { position: sticky; top: 92px; align-self: start; max-height: calc(100vh - 120px); overflow: auto; margin-top: clamp(32px, 6vw, 72px); padding-left: 4px; scrollbar-width: thin; }
.toc .label { margin: 0 0 12px; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc ul ul { padding-left: 12px; }
.toc a { display: block; padding: 5px 0 5px 12px; border-left: 2px solid var(--glass-line); font-size: 13.5px; line-height: 1.4; color: var(--muted); text-decoration: none; transition: color 160ms, border-color 160ms; }
.toc a:hover { color: var(--ink); }
.toc a.active { color: var(--c); border-left-color: var(--c); }
.article-page .toc { --c: var(--sig); }

/* After the article */
.article-foot { margin-top: 56px; }
.share { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; padding: 20px 22px; border-radius: 20px; background: var(--glass-fill); border: 1px solid var(--glass-line); box-shadow: var(--glass-hl); }
.share .label { margin: 0 6px 0 0; }
.share .btn { font-size: 14px; padding: 8px 14px; text-decoration: none; }
a.btn { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; color: var(--ink); }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
.pager-link { display: grid; gap: 4px; padding: 18px 20px; border-radius: 18px; text-decoration: none; color: inherit; background: var(--glass-fill); border: 1px solid var(--glass-line); box-shadow: var(--glass-hl); transition: border-color 200ms, transform 300ms var(--ease); }
.pager-link:hover { border-color: color-mix(in srgb, var(--sig) 50%, var(--glass-line)); transform: translateY(-2px); }
.pager-link .label { margin: 0; }
.pager-link b { font-family: var(--display); font-size: 18px; letter-spacing: -.01em; font-weight: 700; }
.pager-link.newer { grid-column: 2; text-align: right; }
.related { margin-top: 48px; }
.related .label { margin: 0 0 14px; }
.related .post-card h3 { font-size: 18px; }
.related .post-card .summary { display: none; }

/* ── 404 ────────────────────────────────────────────────────── */
.lost { padding-block: clamp(64px, 12vw, 140px); }
.lost-code { margin: 0; font-family: var(--display); font-weight: 800; font-size: clamp(96px, 18vw, 200px); line-height: .85; letter-spacing: -.05em; }
.lost-code span { color: var(--hdr); }
.lost h1 { font-family: var(--display); font-size: clamp(28px, 4vw, 44px); letter-spacing: -.02em; margin: 18px 0 10px; }
.lost .lede { color: var(--muted); margin: 0; }

/* ── Search dialog ─────────────────────────────────────────── */
dialog.search { width: min(640px, calc(100vw - 32px)); max-height: min(72vh, 640px); margin: 12vh auto auto; padding: 0; border-radius: 22px; color: var(--ink); overflow: hidden;
  background: color-mix(in srgb, var(--panel) 82%, transparent); border: 1px solid var(--glass-line); box-shadow: var(--glass-hl), 0 40px 100px -30px rgb(0 0 0 / .6);
  -webkit-backdrop-filter: blur(30px) saturate(180%); backdrop-filter: blur(30px) saturate(180%); }
dialog.search[open] { display: flex; flex-direction: column; animation: search-in 260ms var(--ease) both; }
@keyframes search-in { from { opacity: 0; transform: translateY(-10px) scale(.98); } }
dialog.search::backdrop { background: rgb(6 8 12 / .45); -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px); }
.search-box { display: flex; align-items: center; gap: 12px; padding: 16px 18px; border-bottom: 1px solid var(--glass-line); color: var(--muted); }
.search-box input { flex: 1; min-width: 0; border: 0; outline: 0; background: none; font: inherit; font-size: 18px; color: var(--ink); }
.search-box input::placeholder { color: var(--faint); }
.search-results { list-style: none; margin: 0; padding: 8px; overflow-y: auto; flex: 1; }
.search-results .group { padding: 10px 12px 6px; font-family: var(--mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--faint); }
.search-results a { display: grid; gap: 3px; padding: 11px 14px; border-radius: 14px; color: inherit; text-decoration: none; }
.search-results a[aria-selected="true"] { background: linear-gradient(155deg, color-mix(in srgb, var(--c) 16%, transparent), transparent 80%); box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--c) 35%, transparent); }
.r-meta { font-family: var(--mono); font-size: 11.5px; color: var(--faint); display: flex; gap: 12px; }
.r-meta .cat { color: var(--c); }
.r-title { font-weight: 600; font-size: 16px; }
.r-snippet { font-size: 13.5px; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.r-empty { padding: 28px 16px; text-align: center; color: var(--muted); }
.search-foot { display: flex; gap: 18px; margin: 0; padding: 10px 18px; border-top: 1px solid var(--glass-line); font-family: var(--mono); font-size: 11px; color: var(--faint); }
.search-foot kbd { margin-right: 4px; }

/* ── Smaller screens ───────────────────────────────────────── */
@media (max-width: 1100px) {
  .article-wrap.has-toc { grid-template-columns: minmax(0, 740px); }
  .toc { display: none; }
}
@media (max-width: 860px) {
  .finder { top: 101px; }
  .post-card.featured .post-link { grid-template-columns: 1fr; }
  .post-card.featured .cover { min-height: 0; aspect-ratio: 16 / 9; }
  .prose { font-size: 17px; }
  .pager { grid-template-columns: 1fr; }
  .pager-link.newer { grid-column: auto; text-align: left; }
  dialog.search { margin-top: 8vh; }
}
@media (prefers-reduced-motion: reduce) {
  .post-card, .post-card:hover, .cover img, .pager-link { transition: none; transform: none; }
  .post-card.enter, dialog.search[open] { animation: none; }
}

/* Admonitions (> [!NOTE] etc. from hugo-admonitions): keep their type colour, sit on our glass in both themes. */
.admonition { margin: 1.6em 0 !important; border-radius: 14px !important; overflow: hidden; background: var(--glass-fill) !important; border: 1px solid var(--glass-line) !important; border-left-width: 3px !important; box-shadow: var(--glass-hl); }
.admonition .admonition-content { background: transparent !important; color: inherit !important; }
.admonition .admonition-content :is(p, li) { color: inherit; }
.admonition .admonition-content code { background: color-mix(in srgb, var(--sunk) 75%, transparent) !important; color: inherit !important; }
.admonition a { color: var(--sig) !important; }
/* The module keeps its light-mode colours in dark mode (Note is a deep #096ae1); lift them so titles read on dark glass. */
:root[data-theme="dark"] {
  --adm-note: #6cb6ff; --adm-note-rgb: 108,182,255; --adm-info: #5cc8ff; --adm-info-rgb: 92,200,255;
  --adm-tip: #2bd4c4; --adm-tip-rgb: 43,212,196; --adm-question: #2bd4c4; --adm-question-rgb: 43,212,196; --adm-abstract: #2bd4c4; --adm-abstract-rgb: 43,212,196;
  --adm-success: #4fd18b; --adm-success-rgb: 79,209,139; --adm-experiment: #4fd18b; --adm-experiment-rgb: 79,209,139;
  --adm-warning: #f5b74f; --adm-warning-rgb: 245,183,79; --adm-idea: #f5b74f; --adm-idea-rgb: 245,183,79; --adm-danger: #ff9a5c; --adm-danger-rgb: 255,154,92;
  --adm-caution: #ff5a5f; --adm-caution-rgb: 255,90,95; --adm-error: #ff5a5f; --adm-error-rgb: 255,90,95; --adm-memo: #ff5a5f; --adm-memo-rgb: 255,90,95; --adm-goal: #ff5a5f; --adm-goal-rgb: 255,90,95;
  --adm-important: #b57bff; --adm-important-rgb: 181,123,255; --adm-task: #b57bff; --adm-task-rgb: 181,123,255; --adm-code: #9aa8ff; --adm-code-rgb: 154,168,255; --adm-quote: #9aa8ff; --adm-quote-rgb: 154,168,255;
}
.hero-actions .btn.primary { flex: none; }

/* Pinned bars (the /posts/ finder, the timeline filters): no box of their own while they sit in the page;
   once pinned under the header they get a full-width glass strip that reads as part of the header. */
body { overflow-x: clip; }
.finder, .tl-controls { background: none !important; -webkit-backdrop-filter: none !important; backdrop-filter: none !important; border-bottom: 0 !important; margin-inline: 0 !important; padding-inline: 0 !important; }
.finder::before, .tl-controls::before { content: ''; position: absolute; z-index: -1; top: 0; bottom: 0; left: 50%; width: 100vw; transform: translateX(-50%); pointer-events: none;
  background: var(--glass-bar); -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur); border-bottom: 1px solid var(--glass-line); opacity: 0; transition: opacity 200ms; }
.finder.stuck::before, .tl-controls.stuck::before { opacity: 1; }

/* ── Polish ───────────────────────────────────────────────── */

/* Covers: each diagram whole, like a sheet rising from a topic-tinted, gridded tray. */
.cover:not(.no-image) { display: flex; align-items: flex-end; justify-content: center; padding: 22px 26px 0;
  background:
    linear-gradient(var(--glass-line) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(90deg, var(--glass-line) 1px, transparent 1px) 0 0 / 24px 24px,
    radial-gradient(120% 100% at 50% 0%, color-mix(in srgb, var(--c) 26%, transparent), transparent 70%),
    var(--sunk); }
.cover:not(.no-image) img { width: auto; height: auto; max-width: 100%; max-height: 100%; object-fit: contain; border-radius: 10px 10px 0 0; background: #fff;
  box-shadow: 0 -10px 34px -14px rgb(0 0 0 / .55), 0 0 0 1px rgb(0 0 0 / .06); transform-origin: 50% 100%; transition: transform 600ms var(--ease), filter 300ms; }
.post-card:hover .cover:not(.no-image) img { transform: translateY(-6px) scale(1.02); }
.post-card.featured .cover:not(.no-image) { padding: 36px 44px 0; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .cover img { filter: brightness(.88) contrast(1.04); } }
:root[data-theme="dark"] .cover img { filter: brightness(.88) contrast(1.04); }
.post-card:hover .cover img { filter: none; }

/* Topic chips carry their colour */
.topic .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--c); box-shadow: 0 0 0 3px color-mix(in srgb, var(--c) 20%, transparent); }

/* Stay in the loop */
.follow { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px 32px; margin-top: 56px; padding: clamp(24px, 4vw, 40px); border-radius: 24px;
  background: radial-gradient(500px circle at 0% 0%, color-mix(in srgb, var(--pay) 16%, transparent), transparent 60%), radial-gradient(400px circle at 100% 100%, color-mix(in srgb, var(--sig) 14%, transparent), transparent 60%), var(--glass-fill);
  border: 1px solid var(--glass-line); box-shadow: var(--glass-hl); }
.follow h2 { margin: 6px 0 8px; font-family: var(--display); font-size: clamp(26px, 3vw, 34px); letter-spacing: -.02em; }
.follow p { margin: 0; color: var(--muted); max-width: 52ch; }
.follow .label { color: var(--pay); }
.follow .hero-actions { margin: 0; }

/* Article header: a soft glow in the topic's colour, the full width of the window, fading out below the title */
.article-head { position: relative; }
.article-wrap::before { content: ''; position: absolute; z-index: -1; top: 0; left: 50%; width: 100vw; height: 520px; transform: translateX(-50%); pointer-events: none;
  background: radial-gradient(640px circle at 28% 34%, color-mix(in srgb, var(--c) 22%, transparent), transparent 70%),
    radial-gradient(520px circle at 78% 10%, color-mix(in srgb, var(--c) 10%, transparent), transparent 70%);
  -webkit-mask-image: linear-gradient(to bottom, #000 55%, transparent); mask-image: linear-gradient(to bottom, #000 55%, transparent); }

/* Contents on phones and tablets */
.toc-mobile { display: none; margin: 24px 0 0; border-radius: 16px; background: var(--glass-fill); border: 1px solid var(--glass-line); box-shadow: var(--glass-hl); }
.toc-mobile > summary { display: flex; justify-content: space-between; gap: 12px; padding: 14px 18px; cursor: pointer; list-style: none; font-family: var(--mono); font-size: 12.5px; color: var(--ink); }
.toc-mobile > summary::-webkit-details-marker { display: none; }
.toc-mobile > summary::after { content: ''; width: 7px; height: 7px; margin: 3px 2px 0 auto; border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted); transform: rotate(45deg); transition: transform 250ms var(--ease); }
.toc-mobile[open] > summary::after { transform: translateY(3px) rotate(-135deg); }
.toc-mobile > summary .toc-left { margin-left: auto; }
.toc-mobile nav { padding: 0 18px 14px; }
.toc-mobile ul { list-style: none; margin: 0; padding: 0; }
.toc-mobile ul ul { padding-left: 14px; }
.toc-mobile a { display: block; padding: 6px 0; font-size: 14.5px; color: var(--muted); text-decoration: none; border-top: 1px solid var(--glass-line); }
.toc-mobile a.active { color: var(--c); }
.toc-left { margin: 14px 0 0; padding-left: 14px; font-family: var(--mono); font-size: 11.5px; color: var(--faint); }
.toc-mobile .toc-left { margin: 0; padding: 0; color: var(--sig); }
@media (max-width: 1100px) { .toc-mobile { display: block; } }

/* Jumping to a heading flashes it briefly */
.prose :is(h1, h2, h3, h4):target { animation: target-flash 1.8s var(--ease); border-radius: 8px; }
@keyframes target-flash { 0%, 40% { background: color-mix(in srgb, var(--c) 18%, transparent); box-shadow: 0 0 0 8px color-mix(in srgb, var(--c) 18%, transparent); } 100% { background: transparent; box-shadow: 0 0 0 8px transparent; } }

/* Diagrams zoom in place */
.prose a:has(> picture, > img) { cursor: zoom-in; display: block; }
dialog.zoom { max-width: min(1200px, calc(100vw - 32px)); max-height: calc(100vh - 32px); padding: 0; border: 0; border-radius: 16px; background: #fff; overflow: auto; cursor: zoom-out; box-shadow: 0 40px 120px -30px rgb(0 0 0 / .7); }
dialog.zoom[open] { animation: zoom-in 300ms var(--ease) both; }
@keyframes zoom-in { from { opacity: 0; transform: scale(.94); } }
dialog.zoom::backdrop { background: rgb(6 8 12 / .7); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); }
dialog.zoom img { display: block; max-width: 100%; height: auto; }

/* Who wrote it */
.author { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 20px; align-items: start; margin-bottom: 20px; padding: 24px; border-radius: 20px;
  background: radial-gradient(360px circle at 0% 0%, color-mix(in srgb, var(--sig) 12%, transparent), transparent 60%), var(--glass-fill);
  border: 1px solid var(--glass-line); box-shadow: var(--glass-hl); }
.author img { width: 72px; height: 72px; border-radius: 50%; object-fit: cover; border: 2px solid var(--panel); box-shadow: 0 0 0 2px var(--sig); }
.author .label { margin: 0; }
.author h2 { margin: 4px 0 6px; font-family: var(--display); font-size: 22px; letter-spacing: -.02em; }
.author p { margin: 0; color: var(--muted); font-size: 15px; }
.author-links { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: 10px !important; font-family: var(--mono); font-size: 12.5px; }
.author-links a { color: var(--sig); text-decoration: none; }
.author-links a:hover { text-decoration: underline; }

/* Back to top */
.to-top { position: fixed; z-index: 40; right: var(--gutter); bottom: calc(20px + env(safe-area-inset-bottom, 0px)); width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; color: var(--ink);
  background: var(--glass-fill); border: 1px solid var(--glass-line); box-shadow: var(--glass-hl), var(--glass-drop); -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
  opacity: 0; transform: translateY(12px) scale(.9); pointer-events: none; transition: opacity 250ms, transform 300ms var(--ease), border-color 160ms; }
.to-top.show { opacity: 1; transform: none; pointer-events: auto; }
.to-top:hover { border-color: color-mix(in srgb, var(--sig) 55%, var(--glass-line)); }

@media (max-width: 860px) {
  .cover:not(.no-image) { padding: 16px 18px 0; }
  .post-card.featured .cover:not(.no-image) { padding: 22px 24px 0; }
  .author { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .cover img, .to-top { transition: none; }
  .prose :is(h2, h3, h4):target, dialog.zoom[open] { animation: none; }
}

/* ── Authorship: human-written, or written with an AI tool ── */
.ai-mark { --ai: #8a93a2; display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; color: #fff; background: var(--ai); border: 2px solid var(--bg); box-shadow: 0 0 0 1px color-mix(in srgb, var(--ai) 40%, transparent); flex: none; overflow: hidden; }
.ai-mark svg { width: 15px; height: 15px; }
.ai-mark img { width: 100%; height: 100%; object-fit: cover; }

.byline { display: inline-flex; align-items: center; gap: 12px; margin-top: 18px; padding: 7px 16px 7px 7px; border-radius: 999px; text-decoration: none; color: var(--ink);
  background: var(--glass-fill); border: 1px solid var(--glass-line); box-shadow: var(--glass-hl); transition: border-color 200ms, transform 300ms var(--ease); }
.byline:hover { transform: translateY(-1px); }
.byline .faces { display: inline-flex; align-items: center; }
.byline .faces img { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; border: 2px solid var(--bg); }
.byline .faces .ai-mark { width: 30px; height: 30px; margin-left: -12px; }
.byline .faces .ai-mark + .ai-mark { margin-left: -8px; }
.byline .faces .ai-mark svg { width: 16px; height: 16px; }
.byline-text { display: grid; line-height: 1.25; }
.byline-text b { font-size: 14px; font-weight: 600; }
.byline-text span { font-family: var(--mono); font-size: 11.5px; color: var(--muted); }
.byline.human { border-color: color-mix(in srgb, var(--sig) 35%, var(--glass-line)); }
.byline.human:hover { border-color: color-mix(in srgb, var(--sig) 65%, var(--glass-line)); }
.byline.human .faces img { box-shadow: 0 0 0 2px var(--sig); }
.byline.human .byline-text span { color: var(--sig); }
.byline.ai { --ai: #8b5cf6; border-color: color-mix(in srgb, var(--ai) 40%, var(--glass-line)); background: linear-gradient(110deg, color-mix(in srgb, var(--ai) 12%, transparent), transparent 70%), var(--glass-fill); }
.byline.ai .byline-text span { color: color-mix(in srgb, var(--ai) 80%, var(--ink)); }

/* On the cards */
.post-meta .by { display: inline-flex; align-items: center; gap: 4px; }
.post-meta .by i { font-style: normal; }
.post-meta .by.human { color: var(--sig); }
.post-meta .by.ai { color: var(--pay); }

/* In the author card the tool's mark sits on the photo's edge */
.author-faces { position: relative; display: inline-block; width: 72px; height: 72px; }
.author-faces .ai-mark { position: absolute; right: -6px; bottom: -4px; width: 30px; height: 30px; }
.author-faces .ai-mark svg { width: 16px; height: 16px; }
.author.with-ai img { box-shadow: 0 0 0 2px var(--pay); }

/* The byline shares a row with the topic tags, under the title */
.article-sub { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 20px; margin-top: 16px; }
.article-sub .tags { margin: 0; }
.article-sub .byline { margin-top: 0; margin-left: auto; padding: 5px 14px 5px 5px; gap: 10px; }
.article-sub .byline .faces img { width: 32px; height: 32px; }
.article-sub .byline .faces .ai-mark { width: 26px; height: 26px; margin-left: -10px; }
.article-sub .byline .faces .ai-mark svg { width: 14px; height: 14px; }
.article-sub .byline-text b { font-size: 13px; }
.article-sub .byline-text span { font-size: 11px; }
@media (max-width: 560px) { .article-sub { flex-direction: column; align-items: flex-start; } .article-sub .byline { margin-left: 0; } }