/* ==========================================================================
   Luke Simmons — editorial / museum theme
   Single stylesheet. Tokens → reset → type → layout → components.
   ========================================================================== */

:root {
  --bg:         #f5f1e8;
  --surface:    #fbf8f0;
  --surface-2:  #ece5d4;
  --ink:        #1a1613;
  --muted:      #4b3f30;
  --tertiary:   #8a7a66;
  --accent:     #c4956a;
  --accent-ink: #8a5a2a;
  --rule:       #d9d0bf;
  --rule-soft:  #e6dfcd;

  --font-display: "Fraunces", "Cormorant Garamond", Georgia, serif;
  --font-body:    "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono:    ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --fs-xs:    0.78rem;
  --fs-sm:    0.88rem;
  --fs-base:  1rem;
  --fs-lg:    1.125rem;
  --fs-xl:    1.375rem;
  --fs-2xl:   1.75rem;
  --fs-3xl:   2.25rem;
  --fs-4xl:   3rem;
  --fs-5xl:   3.75rem;

  --s-1: .5rem;
  --s-2: 1rem;
  --s-3: 1.5rem;
  --s-4: 2rem;
  --s-5: 3rem;
  --s-6: 4rem;
  --s-7: 6rem;

  --maxw-prose: 68ch;
  --maxw-page:  72rem;
  --maxw-wide:  84rem;

  --radius: 2px;
}

/* Reset ------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, picture, svg, video { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }

/* Base -------------------------------------------------------------------- */
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  /* Full-bleed sections use width:100vw, which is wider than the content
     area when a scrollbar is present — that forces a horizontal scrollbar
     and shifts centered content. Clip it (clip is sticky-safe; hidden isn't). */
  overflow-x: clip;
}

::selection { background: var(--accent); color: #fff; }

/* Typography -------------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--ink);
}
h1 { font-size: var(--fs-4xl); font-weight: 400; }
h2 { font-size: var(--fs-2xl); margin-top: var(--s-5); margin-bottom: var(--s-2); }
h3 { font-size: var(--fs-xl); margin-top: var(--s-4); margin-bottom: var(--s-1); }
h4 { font-size: var(--fs-lg); margin-top: var(--s-3); margin-bottom: var(--s-1); font-weight: 600; }

p { margin: 0 0 var(--s-2); }
p + p { margin-top: var(--s-2); }

a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color .15s ease, text-decoration-color .15s ease;
}
a:hover { color: var(--accent-ink); text-decoration-color: var(--accent-ink); }

strong, b { font-weight: 600; }
em, i { font-style: italic; }

code, pre, kbd, samp { font-family: var(--font-mono); font-size: 0.92em; }
code { background: var(--surface-2); padding: 0.1em 0.35em; border-radius: var(--radius); }
pre {
  background: var(--surface-2);
  color: var(--ink);
  padding: var(--s-2) var(--s-3);
  border-left: 2px solid var(--accent);
  overflow-x: auto;
  margin: var(--s-3) 0;
  font-size: 0.88rem;
  line-height: 1.55;
}
pre code { background: transparent; padding: 0; }

blockquote {
  margin: var(--s-3) 0;
  padding: 0 var(--s-3);
  border-left: 2px solid var(--accent);
  color: var(--muted);
  font-style: italic;
}

hr { border: 0; border-top: 1px solid var(--rule); margin: var(--s-5) 0; }

small, .small { font-size: var(--fs-sm); color: var(--muted); }

/* Anchor-link pilcrow on headings (JS-added) */
.prose h2, .prose h3 { position: relative; }
.anchor-link {
  margin-left: 0.45em;
  color: var(--accent);
  text-decoration: none;
  font-weight: 400;
  font-size: 0.85em;
  opacity: 0;
  transition: opacity 0.15s ease, color 0.15s ease;
  vertical-align: baseline;
  display: inline-block;
}
.prose h2:hover .anchor-link,
.prose h3:hover .anchor-link,
.anchor-link:focus-visible {
  opacity: 0.8;
}
.anchor-link:hover { opacity: 1; color: var(--accent-ink); }
.anchor-link::after {
  content: '';
  margin-left: 0.4em;
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-style: italic;
  letter-spacing: 0;
}
.anchor-link.copied::after { content: 'copied'; }

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--tertiary);
  font-weight: 500;
  margin-bottom: var(--s-2);
  display: block;
}

.lede {
  font-size: var(--fs-lg);
  line-height: 1.55;
  color: var(--muted);
  max-width: var(--maxw-prose);
}

.page-cta {
  margin: var(--s-3) 0;
  padding: var(--s-3) var(--s-4);
  border-left: 3px solid var(--accent);
  background: rgba(196, 149, 106, 0.06);
  border-radius: 0 4px 4px 0;
  max-width: var(--maxw-prose);
  line-height: 1.55;
}
.page-cta strong { display: block; margin-bottom: 0.25rem; }
.page-cta a { font-weight: 600; }

.cross-regional-synthesis {
  margin-top: var(--s-5);
  padding-top: var(--s-4);
  border-top: 1px solid var(--rule);
}
.cross-regional-synthesis > h3 {
  margin: 0.25rem 0 var(--s-2) 0;
}

.horizon-band {
  display: inline-flex;
  align-items: center;
  gap: var(--s-1);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 3px;
  padding: 0.2em 0.6em;
  margin: var(--s-2) 0 var(--s-4);
}

/* Layout ------------------------------------------------------------------ */
.page {
  max-width: var(--maxw-page);
  margin: 0 auto;
  padding: 0 var(--s-3);
}

/* Page-intro slot wrapper. Centered to match .page so slot Markdown
   doesn't flush against the viewport edge. Full-bleed section blocks
   inside still escape via their own width:100vw / margin-left
   calc(50% - 50vw) trick (see static/blocks.css). */
.page-intro {
  max-width: var(--maxw-page);
  margin: 0 auto;
  padding: 0 var(--s-3);
}

/* Responsive video embed (used for the YouTube iframe on the David
   Simmons archive overview, and any future video embeds). 16:9 aspect
   ratio is preserved across viewport widths via CSS aspect-ratio. The
   iframe is loaded lazily by the browser so it won't fetch from YouTube
   until the user scrolls it into view. */
.video-embed {
  position: relative;
  aspect-ratio: 16 / 9;
  width: 100%;
  margin: var(--s-3) 0;
  border-radius: 4px;
  overflow: hidden;
  background: #000;
}
.video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* Portrait image used on the home page intro. Small circular crop. */
img.portrait-circle {
  display: block;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto;
}

/* Home page intro layout: vertically center portrait against bio so the
   small round portrait doesn't anchor to the top of a tall text column.
   Scoped to .page-intro to avoid affecting other ::columns uses. */
.page-intro .block-columns.cols-2 {
  align-items: center;
}

/* Tame the H1 size when it lives inside a column rather than spanning the
   full page-intro width. Otherwise the page-header --fs-4xl looks oversized
   in a 50% column. Margin-bottom adds breathing room before the bio prose. */
.page-intro .block-column h1 {
  font-size: var(--fs-3xl);
  margin-top: 0;
  margin-bottom: var(--s-3);
}

/* NZ national summary — essay-style. Each theme is an <h2>-anchored
   section; within each, patterns are mini-essays (h3 + lede + narrative
   paragraphs). The "Observed across <regions>" closer is a small italic
   line so the reader's eye stays in the prose. */
.nz-essay > p,
.nz-essay h2,
.nz-essay h3 {
  max-width: 70ch;
}
.nz-theme-essay {
  margin: var(--s-5) 0;
}
.nz-theme-essay > h2 {
  border-bottom: 1px solid var(--rule);
  padding-bottom: var(--s-2);
  margin-bottom: var(--s-3);
}
.nz-theme-essay > h2 a {
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.nz-theme-essay > h2 a:hover {
  border-bottom-color: var(--accent);
  color: var(--accent-ink);
}
.nz-theme-essay h3 {
  margin-top: var(--s-4);
  font-size: var(--fs-lg);
  font-weight: 500;
}
.nz-theme-essay p.lede {
  font-size: 1.05em;
  line-height: 1.5;
  color: var(--ink);
  margin-top: var(--s-1);
}
.nz-manifests {
  font-size: var(--fs-sm);
  color: var(--c-muted, var(--tertiary));
  margin-top: var(--s-2);
}
.nz-manifests a {
  text-decoration-color: var(--rule-soft);
}
.nz-manifests a:hover {
  text-decoration-color: var(--accent);
}

/* Leaf list (used on each region/<section>/ page to list problem leaves
   with title + summary). Shares visual language with the .theme-list on
   region indexes. */
.leaf-list {
  list-style: none;
  padding: 0;
  margin: var(--s-4) 0;
  display: grid;
  gap: var(--s-3);
}
.leaf-list-item {
  padding: var(--s-3) 0;
  border-bottom: 1px solid var(--rule-soft);
}
.leaf-list-item:last-child { border-bottom: 0; }
.leaf-title {
  display: inline-block;
  font-family: var(--font-display, inherit);
  font-size: var(--fs-lg);
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  margin-bottom: var(--s-1);
}
.leaf-title:hover {
  color: var(--accent-ink);
  border-bottom-color: var(--accent);
}
.leaf-summary {
  margin: var(--s-1) 0 0;
  color: var(--c-muted, var(--tertiary));
  font-size: var(--fs-md);
  line-height: 1.55;
}
.wide {
  max-width: var(--maxw-wide);
  margin: 0 auto;
  padding: 0 var(--s-3);
}
.prose {
  max-width: var(--maxw-prose);
}
.prose ul, .prose ol {
  padding-left: var(--s-3);
  margin: 0 0 var(--s-2);
  list-style: disc;
}
.prose ol { list-style: decimal; }
.prose li { margin-bottom: var(--s-1); }
.prose li > ul, .prose li > ol { margin-top: var(--s-1); }

section + section { margin-top: var(--s-5); }

/* Nav --------------------------------------------------------------------- */
.site-nav {
  border-bottom: 1px solid var(--rule);
  background: var(--bg);
}
.site-nav .nav-inner {
  max-width: var(--maxw-page);
  margin: 0 auto;
  padding: var(--s-3) var(--s-3);
  display: flex;
  align-items: baseline;
  gap: var(--s-4);
  flex-wrap: wrap;
}
.nav-logo {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: 500;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
}
.nav-logo:hover { color: var(--accent-ink); text-decoration: none; }

.nav-links {
  display: flex;
  gap: var(--s-3);
  margin-left: auto;
  flex-wrap: wrap;
}
.nav-link {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}
.nav-link:hover { color: var(--ink); text-decoration: none; border-bottom-color: var(--accent); }
.nav-link.active { color: var(--ink); border-bottom-color: var(--accent); }

/* CSS-only hamburger: checkbox hack, no JS */
.nav-toggle-checkbox { display: none; }
.nav-toggle-label { display: none; }

/* Sub-nav ----------------------------------------------------------------- */
.subnav {
  border-bottom: 1px solid var(--rule-soft);
  background: var(--surface);
}
.subnav-inner {
  max-width: var(--maxw-page);
  margin: 0 auto;
  padding: var(--s-2) var(--s-3);
  display: flex;
  gap: var(--s-3);
  flex-wrap: wrap;
  font-size: var(--fs-sm);
}
.subnav a {
  color: var(--tertiary);
  text-decoration: none;
  letter-spacing: 0.02em;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}
.subnav a:hover { color: var(--ink); border-bottom-color: var(--accent); }
.subnav a.active { color: var(--ink); border-bottom-color: var(--accent); }
.subnav .disabled {
  color: var(--tertiary);
  opacity: 0.55;
  cursor: not-allowed;
  font-style: italic;
}

/* Second-tier section nav (e.g. CS pages within /research/computer-science/) */
.subnav-secondary {
  background: var(--surface-2);
  border-bottom: 1px solid var(--rule-soft);
  /* Stick to top while reading long articles */
  position: sticky;
  top: 0;
  z-index: 20;
  /* Subtle cream translucency so content scrolling under it still reads */
  background: rgba(236, 229, 212, 0.94);
  backdrop-filter: saturate(1.2) blur(6px);
  -webkit-backdrop-filter: saturate(1.2) blur(6px);
}
.subnav-secondary .subnav-inner {
  font-size: var(--fs-xs);
  padding: 0.55rem var(--s-3);
  align-items: baseline;
}
.subnav-secondary .subnav-label {
  font-family: var(--font-body);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--tertiary);
  font-weight: 500;
  margin-right: var(--s-1);
}
.subnav-secondary a {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.02em;
  color: var(--muted);
}
.subnav-secondary a.active { color: var(--accent-ink); border-bottom-color: var(--accent); }

/* Prev / next pagination footer */
.pagination-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-3);
  margin: var(--s-5) 0 var(--s-4);
  padding-top: var(--s-3);
  border-top: 1px solid var(--rule);
  font-family: var(--font-body);
}
.pagination-pair .prev,
.pagination-pair .next {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  padding: var(--s-2) 0;
  color: var(--muted);
}
.pagination-pair .next { text-align: right; align-items: flex-end; }
.pagination-pair .label {
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--tertiary);
  margin-bottom: 0.25rem;
}
.pagination-pair .title {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  color: var(--ink);
  font-style: italic;
  font-weight: 500;
}
.pagination-pair a:hover { text-decoration: none; }
.pagination-pair a:hover .title { color: var(--accent-ink); }
.pagination-pair .empty { opacity: 0.3; pointer-events: none; }
@media (max-width: 680px) {
  .pagination-pair { grid-template-columns: 1fr; gap: var(--s-2); }
  .pagination-pair .next { text-align: left; align-items: flex-start; }
}

/* Breadcrumbs ------------------------------------------------------------- */
.breadcrumbs {
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tertiary);
  margin: var(--s-4) 0 var(--s-2);
}
.breadcrumbs a { color: var(--tertiary); text-decoration: none; }
.breadcrumbs a:hover { color: var(--ink); }
.breadcrumbs .sep { margin: 0 0.4em; color: var(--rule); }

/* Hero -------------------------------------------------------------------- */
.hero {
  position: relative;
  margin-bottom: var(--s-5);
  padding: var(--s-6) 0 var(--s-5);
  overflow: hidden;
  border-bottom: 1px solid var(--rule);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("/static/img/cover.jpg") center 40%/cover no-repeat;
  opacity: 0.28;
  z-index: 0;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(245,241,232,0.6) 0%, rgba(245,241,232,0.85) 65%, var(--bg) 100%);
  z-index: 1;
}
.hero .hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--maxw-wide);
  margin: 0 auto;
  padding: 0 var(--s-3);
}
.hero h1 {
  font-size: var(--fs-5xl);
  font-weight: 400;
  max-width: 20ch;
}
.hero .lede { margin-top: var(--s-3); }
.hero .now-line {
  margin-top: var(--s-3);
  padding-top: var(--s-2);
  border-top: 1px solid var(--rule-soft);
  font-size: var(--fs-sm);
  color: var(--muted);
  max-width: var(--maxw-prose);
}
.hero .now-line a {
  color: var(--accent-ink);
  text-decoration-color: var(--accent);
  white-space: nowrap;
}

/* Page header (non-hero) -------------------------------------------------- */
.page-header {
  padding: var(--s-5) 0 var(--s-3);
  border-bottom: 1px solid var(--rule-soft);
  margin-bottom: var(--s-4);
}
.page-header h1 { font-size: var(--fs-4xl); }

/* Accent rule ------------------------------------------------------------- */
.rule {
  width: 48px;
  height: 2px;
  background: var(--accent);
  border: 0;
  margin: var(--s-3) 0;
}

/* Card grid --------------------------------------------------------------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--s-3);
  margin: var(--s-4) 0;
}
.card {
  background: var(--surface);
  border: 1px solid var(--rule-soft);
  padding: var(--s-3);
  text-decoration: none;
  color: var(--ink);
  display: block;
  transition: border-color .15s ease, transform .15s ease;
}
.card:hover {
  border-color: var(--accent);
  text-decoration: none;
  transform: translateY(-1px);
}
.card h3 { margin-top: 0; font-size: var(--fs-lg); }
.card .meta { font-size: var(--fs-xs); color: var(--tertiary); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: var(--s-1); }
.card p { color: var(--muted); font-size: var(--fs-sm); margin: var(--s-1) 0 0; }
.card.disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* Meta/tag chips ---------------------------------------------------------- */
.chips {
  display: flex;
  gap: var(--s-1);
  flex-wrap: wrap;
  margin: var(--s-2) 0;
}
.chip {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  color: var(--muted);
  background: var(--surface);
}

/* Figure ------------------------------------------------------------------ */
figure {
  margin: var(--s-4) 0;
}
figure img {
  border: 1px solid var(--rule);
  background: var(--surface);
}
figcaption {
  font-size: var(--fs-xs);
  color: var(--tertiary);
  margin-top: var(--s-1);
  letter-spacing: 0.04em;
}

/* Tables ------------------------------------------------------------------ */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--s-3) 0;
  font-size: var(--fs-sm);
}
th, td {
  text-align: left;
  padding: var(--s-1) var(--s-2);
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
}
th {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tertiary);
  border-bottom-color: var(--rule);
}
tbody tr:hover { background: var(--surface); }

/* Timeline ---------------------------------------------------------------- */
.timeline {
  border-left: 1px solid var(--rule);
  margin: var(--s-4) 0;
  padding-left: var(--s-3);
}
.timeline-entry {
  display: grid;
  grid-template-columns: 5rem 1fr;
  gap: var(--s-3);
  padding: var(--s-2) 0;
  border-bottom: 1px solid var(--rule-soft);
  align-items: baseline;
}
.timeline-entry:last-child { border-bottom: 0; }
.timeline-year {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  color: var(--accent-ink);
  font-weight: 500;
}
.timeline-event { color: var(--ink); font-size: var(--fs-base); line-height: 1.5; }
.timeline-type {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--tertiary);
  margin-top: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Blog --------------------------------------------------------------------- */
.blog-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 18rem;
  gap: var(--s-5);
  margin-top: var(--s-3);
  align-items: start;
}
@media (max-width: 860px) {
  .blog-grid { grid-template-columns: 1fr; gap: var(--s-4); }
}

.blog-archive {
  border-left: 1px solid var(--rule-soft);
  padding-left: var(--s-3);
  font-size: var(--fs-sm);
  position: sticky;
  top: var(--s-4);
}
@media (max-width: 860px) {
  .blog-archive {
    position: static;
    border-left: 0;
    border-top: 1px solid var(--rule-soft);
    padding: var(--s-3) 0 0;
  }
}
.archive-title {
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--tertiary);
  margin: 0 0 var(--s-2);
  font-family: var(--font-body);
  font-weight: 600;
}
.archive-year {
  margin-bottom: var(--s-3);
}
.archive-year h3 {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 500;
  margin: 0 0 var(--s-1);
  color: var(--accent-ink);
}
.archive-year ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.archive-year li {
  display: grid;
  grid-template-columns: 3.2rem 1fr auto;
  gap: 0.5rem;
  align-items: baseline;
  padding: 0.35rem 0;
  border-bottom: 1px dotted var(--rule-soft);
  line-height: 1.4;
}
.archive-year li:last-child { border-bottom: 0; }
.archive-year time {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--tertiary);
  letter-spacing: 0.05em;
}
.archive-year a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.archive-year a:hover {
  color: var(--accent-ink);
  border-bottom-color: var(--accent);
}
.author-chip-mini {
  font-size: 0.62rem;
  padding: 0.1rem 0.35rem;
}

.post-list {
  list-style: none;
  padding: 0;
  margin: var(--s-3) 0;
}
.post-entry {
  padding: var(--s-3) 0;
  border-bottom: 1px solid var(--rule-soft);
}
.post-entry:last-child { border-bottom: 0; }
.post-entry-title {
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  font-weight: 500;
  margin: 0.25rem 0 var(--s-1);
}
.post-entry-title a {
  color: var(--ink);
  text-decoration: none;
}
.post-entry-title a:hover { color: var(--accent-ink); text-decoration: underline; text-decoration-color: var(--accent); }
.post-entry-summary { color: var(--muted); max-width: var(--maxw-prose); margin: 0 0 var(--s-1); }

.post-meta {
  display: flex;
  gap: var(--s-2);
  align-items: center;
  font-size: var(--fs-xs);
  color: var(--tertiary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.post-meta time { font-feature-settings: "tnum"; letter-spacing: 0.06em; }

.author-chip {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius);
  letter-spacing: 0.08em;
  text-transform: lowercase;
}
.author-chip.author-luke {
  background: var(--surface);
  color: var(--muted);
  border: 1px solid var(--rule);
}
.author-chip.author-agent {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent-ink);
}
/* Auckland research: AI-drafted, Luke-edited. Visually distinct from plain
   `agent` so readers can tell at a glance that these pages had a human pass. */
.author-chip.author-agent-edited {
  background: var(--surface);
  color: var(--accent-ink);
  border: 1px solid var(--accent);
  text-transform: lowercase;
}

/* Branch authorship banner — shown on every page inside a research branch.
   The "edited" variant (Auckland) carries the accent on the left rule so it
   is distinguishable from the plain "agent" banner on the other branches. */
.branch-authorship {
  max-width: var(--maxw-wide);
  margin: var(--s-2) auto 0;
  padding: 0 var(--s-3);
}
.branch-authorship-inner {
  background: var(--surface);
  border-left: 3px solid var(--rule);
  padding: var(--s-2) var(--s-3);
  font-size: var(--fs-sm);
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: baseline;
  line-height: 1.5;
}
.branch-authorship-edited .branch-authorship-inner {
  border-left-color: var(--accent);
}

/* Two-column authorship-regime grid on the research overview page. */
.authorship-split {
  display: grid;
  gap: var(--s-3);
  grid-template-columns: 1fr;
  margin: var(--s-3) 0;
}
@media (min-width: 48rem) {
  .authorship-split { grid-template-columns: 1fr 1fr; }
}
.authorship-regime {
  background: var(--surface);
  border: 1px solid var(--rule);
  padding: var(--s-3);
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}
.authorship-regime > .author-chip {
  align-self: flex-start;
}
.authorship-regime h3 {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  line-height: 1.2;
  margin: 0;
}
.authorship-regime p {
  margin: 0;
}

/* Code highlighting (codehilite extension output) */
.codehilite {
  background: var(--surface-2);
  border-left: 2px solid var(--accent);
  padding: var(--s-2) var(--s-3);
  overflow-x: auto;
  margin: var(--s-3) 0;
  font-size: 0.88rem;
}
.codehilite pre { margin: 0; border: 0; padding: 0; background: transparent; }

/* Travel photo grid ------------------------------------------------------- */
.travel-photos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
  gap: var(--s-3);
  margin: var(--s-4) 0;
}
.travel-photos figure { margin: 0; }
.travel-photos img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4/3;
}

/* Works cards ------------------------------------------------------------- */
.work {
  padding: var(--s-3) 0;
  border-bottom: 1px solid var(--rule-soft);
  display: flex;
  gap: var(--s-3);
  align-items: flex-start;
}
.work:last-child { border-bottom: 0; }
.work-cover {
  flex: 0 0 auto;
  width: 140px;
  margin: 0;
}
.work-cover img {
  width: 100%;
  height: auto;
  border: 1px solid var(--rule);
  background: var(--surface);
  display: block;
}
.work-cover figcaption {
  font-size: var(--fs-xs);
  color: var(--tertiary);
  margin-top: var(--s-1);
  letter-spacing: 0.04em;
  line-height: 1.4;
}
.work-body {
  flex: 1 1 auto;
  min-width: 0;
}
.work-title {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  margin-bottom: 0.25rem;
}
.work-title em { font-style: italic; }
.work-meta {
  font-size: var(--fs-xs);
  color: var(--tertiary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--s-1);
}
.work-subtitle {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--muted);
  margin-bottom: var(--s-1);
}
.work p { color: var(--muted); max-width: var(--maxw-prose); }
@media (max-width: 640px) {
  .work { flex-direction: column; }
  .work-cover { width: 120px; }
}

/* Bio panel (david simmons index) ---------------------------------------- */
.bio-panel {
  display: grid;
  grid-template-columns: minmax(180px, 260px) 1fr;
  gap: var(--s-4);
  margin: var(--s-4) 0;
  align-items: start;
}
.bio-panel img {
  border: 1px solid var(--rule);
  background: var(--surface);
  width: 100%;
  height: auto;
}
.bio-panel .bio-details dt {
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tertiary);
  margin-top: var(--s-2);
}
.bio-panel .bio-details dd {
  font-size: var(--fs-base);
  color: var(--ink);
  margin: 0;
}
.photo-missing {
  aspect-ratio: 3/4;
  background: var(--surface);
  border: 1px dashed var(--rule);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--tertiary);
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-align: center;
  padding: var(--s-3);
}

/* Handles list (contact page) --------------------------------------------- */
ul.handles {
  list-style: none;
  padding: 0;
  margin: var(--s-3) 0;
  max-width: 42rem;
}
ul.handles li {
  display: grid;
  grid-template-columns: 6rem 1fr auto;
  gap: var(--s-2);
  align-items: baseline;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--rule-soft);
}
ul.handles li:last-child { border-bottom: 0; }
ul.handles .handle-label {
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--tertiary);
  font-weight: 500;
}
ul.handles a {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease, color 0.15s ease;
}
ul.handles a:hover {
  color: var(--accent-ink);
  border-bottom-color: var(--accent);
}
ul.handles .handle-note {
  font-size: var(--fs-xs);
  color: var(--tertiary);
  font-style: italic;
}
@media (max-width: 520px) {
  ul.handles li { grid-template-columns: 1fr; gap: 0.2rem; }
  ul.handles .handle-note { margin-left: 0; }
}

/* Forms ------------------------------------------------------------------- */
form.contact-form {
  max-width: 42rem;
  margin: var(--s-4) 0;
}
.field { margin-bottom: var(--s-3); }
.field label {
  display: block;
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tertiary);
  margin-bottom: var(--s-1);
  font-weight: 500;
}
.field input, .field textarea, .field select {
  width: 100%;
  padding: var(--s-1) var(--s-2);
  border: 1px solid var(--rule);
  background: var(--surface);
  color: var(--ink);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.5;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}
.field textarea { min-height: 9rem; resize: vertical; }
.field select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 2.5rem;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path fill='none' stroke='%236b5d4a' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' d='M1 1.5l5 5 5-5'/></svg>");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  cursor: pointer;
}
.field .error {
  display: block;
  color: #8a2a2a;
  font-size: var(--fs-xs);
  margin-top: 0.25rem;
}
button, .btn {
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0.65rem 1.4rem;
  background: var(--ink);
  color: var(--bg);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: background .15s ease, color .15s ease;
}
button:hover, .btn:hover {
  background: var(--accent-ink);
  border-color: var(--accent-ink);
  color: var(--bg);
  text-decoration: none;
}
.btn.ghost {
  background: transparent;
  color: var(--ink);
}
.btn.ghost:hover { background: var(--ink); color: var(--bg); }

.notice {
  padding: var(--s-2) var(--s-3);
  border-left: 2px solid var(--accent);
  background: var(--surface);
  margin: var(--s-3) 0;
  color: var(--muted);
  font-size: var(--fs-sm);
}

/* Footer ------------------------------------------------------------------ */
.site-footer {
  border-top: 1px solid var(--rule);
  margin-top: var(--s-7);
  padding: var(--s-4) var(--s-3);
  background: var(--bg);
}
.site-footer .footer-inner {
  max-width: var(--maxw-page);
  margin: 0 auto;
  text-align: center;
  font-size: var(--fs-xs);
  color: var(--tertiary);
  letter-spacing: 0.04em;
}
.site-footer a {
  color: var(--tertiary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.site-footer a:hover { color: var(--ink); border-bottom-color: var(--accent); }
.site-footer .footer-nav {
  display: flex;
  justify-content: center;
  gap: var(--s-2);
  flex-wrap: wrap;
  margin-bottom: var(--s-2);
}
.site-footer .footer-nav .sep { color: var(--rule); }

/* Responsive -------------------------------------------------------------- */
@media (max-width: 680px) {
  :root {
    --fs-4xl: 2.25rem;
    --fs-5xl: 2.75rem;
    --fs-3xl: 1.875rem;
  }
  .site-nav .nav-inner {
    gap: var(--s-2);
    padding: var(--s-2);
    align-items: center;
  }
  .nav-logo { margin-right: auto; }
  .nav-toggle-label {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    padding: 6px 7px;
    cursor: pointer;
    border: 1px solid transparent;
    border-radius: var(--radius);
    transition: border-color 0.15s ease;
  }
  .nav-toggle-label:hover,
  .nav-toggle-checkbox:focus-visible ~ .nav-toggle-label {
    border-color: var(--rule);
  }
  .nav-toggle-label span {
    display: block;
    height: 2px;
    width: 100%;
    background: var(--ink);
    transition: transform 0.2s ease, opacity 0.2s ease;
    transform-origin: center;
  }
  /* Nav links collapse into a dropdown panel that only shows when checked */
  .nav-links {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    margin-left: 0;
    margin-top: var(--s-2);
    padding-top: var(--s-2);
    border-top: 1px solid var(--rule-soft);
    order: 10;  /* force onto the next row */
  }
  .nav-toggle-checkbox:checked ~ .nav-links { display: flex; }
  .nav-links .nav-link {
    padding: 0.75rem 0.25rem;
    border-bottom: 1px solid var(--rule-soft);
    border-top: 0 solid transparent;
  }
  .nav-links .nav-link:last-child { border-bottom: 0; }
  /* Animate bars into an X when open */
  .nav-toggle-checkbox:checked ~ .nav-toggle-label span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-toggle-checkbox:checked ~ .nav-toggle-label span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle-checkbox:checked ~ .nav-toggle-label span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .hero { padding: var(--s-5) 0 var(--s-4); }
  .hero h1 { font-size: var(--fs-4xl); }
  .bio-panel { grid-template-columns: 1fr; }
  .timeline-entry { grid-template-columns: 3.5rem 1fr; gap: var(--s-2); }
  .subnav-inner { gap: var(--s-2); padding: var(--s-2); font-size: var(--fs-xs); }
}

/* ── Citation block (SEP quarterly archive pattern) ─────────────────────── */
.cite-block {
  margin: var(--s-6) 0 var(--s-4);
  border-top: 1px solid var(--c-border);
  padding-top: var(--s-3);
}
.cite-summary {
  font-size: var(--fs-sm);
  color: var(--c-muted);
  cursor: pointer;
  user-select: none;
  list-style: none;
}
.cite-summary::-webkit-details-marker { display: none; }
.cite-summary::before { content: "▸ "; font-size: 0.7em; }
details[open] .cite-summary::before { content: "▾ "; }
.cite-body {
  margin-top: var(--s-3);
  font-size: var(--fs-sm);
}
.cite-label {
  font-weight: 600;
  color: var(--c-muted);
  margin-bottom: var(--s-1);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: var(--fs-xs);
}
.cite-entry {
  margin: 0 0 var(--s-3) var(--s-3);
  padding-left: var(--s-3);
  border-left: 3px solid var(--c-border);
  color: var(--c-text);
  font-style: normal;
}
.cite-entry a {
  word-break: break-all;
  font-size: var(--fs-xs);
}
.cite-note {
  color: var(--c-muted);
  font-size: var(--fs-xs);
  margin-top: var(--s-1);
}

/* In-text citation cluster — appears at the end of each problem block in
   a consolidated section essay. Each [N] is a clickable link that scrolls
   to the corresponding entry in the References ordered list at the bottom. */
.problem-citations {
  font-size: var(--fs-sm);
  margin: var(--s-2) 0 var(--s-4);
  color: var(--c-muted, var(--tertiary));
}
.problem-citations .cite-label {
  font-style: italic;
  margin-right: 4px;
}
.problem-citations .cite-ref {
  text-decoration: none;
  font-variant-numeric: tabular-nums;
  padding: 1px 4px;
  border-radius: 3px;
  border-bottom: 1px dotted var(--accent);
}
.problem-citations .cite-ref:hover {
  background: rgba(196, 149, 106, 0.10); /* accent at low alpha */
  border-bottom-style: solid;
}

/* Numbered references list at the bottom of each section essay. Each li
   has id="ref-N" so in-text [N] anchors land on the matching entry. */
ol.references-list {
  padding-left: var(--s-4);
  font-size: var(--fs-sm);
}
ol.references-list li {
  margin: var(--s-2) 0;
  padding-left: var(--s-1);
  line-height: 1.5;
}
ol.references-list li:target {
  background: rgba(196, 149, 106, 0.12);
  border-radius: 4px;
  padding: var(--s-1) var(--s-2);
  margin-left: calc(-1 * var(--s-2));
  transition: background 600ms;
}
ol.references-list a {
  word-break: break-all;
  font-size: var(--fs-xs);
}

/* Research index tabs ----------------------------------------------------
   CSS-only radio-button tabs. The two <input type="radio"> are visually
   hidden but drive the active state via :checked + sibling selectors.
   No JavaScript. */
.research-tabs { margin: var(--s-4) 0; }

.research-tabs .tab-radio {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.research-tabs .tab-bar {
  display: flex;
  gap: var(--s-3);
  border-bottom: 1px solid var(--rule);
  margin-bottom: var(--s-4);
  flex-wrap: wrap;
}

.research-tabs .tab-label {
  cursor: pointer;
  padding: var(--s-2) 0;
  margin-bottom: -1px;
  font-family: var(--font-display, inherit);
  font-size: var(--fs-md);
  letter-spacing: 0.01em;
  color: var(--tertiary, #777);
  border-bottom: 2px solid transparent;
  transition: color 120ms, border-color 120ms;
}
.research-tabs .tab-label:hover {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

/* Show focus ring on the visible label when the hidden radio gets focus. */
.research-tabs .tab-radio:focus-visible + .tab-bar .tab-label,
.research-tabs .tab-radio:focus-visible ~ .tab-bar .tab-label {
  outline: none;
}
#tab-aotearoa:focus-visible ~ .tab-bar label[for="tab-aotearoa"],
#tab-science:focus-visible ~ .tab-bar label[for="tab-science"] {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Active-tab styling driven by :checked on the matching radio. */
#tab-aotearoa:checked ~ .tab-bar label[for="tab-aotearoa"],
#tab-science:checked ~ .tab-bar label[for="tab-science"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
  font-weight: 500;
}

/* Hide all panels by default, then reveal the one matching the checked radio. */
.research-tabs .tab-panel { display: none; }
#tab-aotearoa:checked ~ .tab-panel-aotearoa,
#tab-science:checked ~ .tab-panel-science {
  display: block;
}

/* Home intro video */
.intro-video {
  display: block;
  width: 100%;
  max-width: 720px;
  margin: 1.5rem auto 0.5rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: #000;
}