/* ============================================================
   Makasete Theme (JP) — theme.css
   Aligned to EN design system: Paper/Ink/Accent tokens,
   Fraunces serif + Inter sans + JetBrains Mono
   ============================================================ */

/* ─── 1. Design Tokens ────────────────────────────────────── */
:root {
  /* ── EN canonical token names ───────────────────── */
  --paper:        #F3F3F3;
  --paper-2:      #E5E5E5;
  --paper-3:      #DADADA;
  --ink:          #222222;
  --ink-2:        #3A3A3A;
  --ink-3:        #6A6A6A;
  --ink-4:        #9D9D9D;
  --ink-5:        #B8B8B8;
  --line:         #C9C9C9;
  --line-2:       #9D9D9D;
  --accent:       #27C4CF;
  --accent-2:     #54D5DD;
  --accent-soft:  #D9F4F6;

  --f-serif: 'Fraunces', 'Noto Serif JP', Georgia, 'Times New Roman', serif;
  --f-sans:  'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --f-mono:  'JetBrains Mono', ui-monospace, 'SF Mono', 'Menlo', monospace;

  --container: 80rem;
  --header-h:  4.25rem;   /* ~68px — desktop .site-nav: 18px pad + 32px btn + 18px pad */
  --pad-x:     32px;
  --pad-y:     28px;
  --radius:    12px;
  --radius-sm: 7px;
  --radius-xs: 4px;   /* small chips, badges, kbd tags */
  --toc-w:     16rem;

  /* ── Semantic type tokens (mirrors style.css) ───────── */
  --kicker-family:   var(--f-mono);
  --kicker-size:     10.5px;
  --kicker-tracking: 0.14em;
  --kicker-case:     uppercase;

  --h1-family:   var(--f-serif);
  --h1-size:     clamp(32px, 3.5vw, 46px);
  --h1-weight:   400;
  --h1-tracking: -0.025em;
  --h1-leading:  1.02;

  --h2-family:   var(--f-serif);
  --h2-size:     32px;
  --h2-weight:   400;
  --h2-tracking: -0.022em;
  --h2-leading:  1.1;

  --h3-family:   var(--f-serif);
  --h3-size:     19px;
  --h3-weight:   500;
  --h3-tracking: -0.015em;

  --kpi-family:   var(--f-serif);
  --kpi-size:     42px;
  --kpi-weight:   400;
  --kpi-tracking: -0.03em;

  /* ── Aliases — keeps existing JP blog content styles working ── */
  --bg:           var(--paper);
  --bg-card:      var(--paper-2);
  --text:         var(--ink);
  --text-muted:   var(--ink-3);
  --text-subtle:  var(--ink-4);
  --border:       var(--line);
  --border-strong: var(--ink);
  --font:         var(--f-sans);
  --accent-dark:  #1faab5;
}

/* ─── 2. Reset & Base ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 1.5rem); }

body {
  font-family: var(--f-sans);
  background: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.site-page {
  max-width: 1440px;
  margin: 0 auto;
  background: var(--paper);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

img, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font: inherit; background: none; border: none; }

/* ─── 3. Container ────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1rem;
}

@media (min-width: 640px)  { .container { padding-inline: 1.5rem; } }
@media (min-width: 1024px) { .container { padding-inline: 2rem;   } }

/* ─── 4. Site nav (matches landing page .site-nav) ────────── */
.site-nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 56px;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  font-family: var(--f-sans);
  position: sticky; top: 0; z-index: 100;
}
.site-nav .nav-brand {
  display: flex; align-items: center; gap: 10px;
}
.site-nav .nav-brand .wordmark {
  font-family: var(--f-serif); font-weight: 500; font-size: 19px;
  letter-spacing: -0.01em; color: var(--ink);
}
.site-nav .nav-brand a:hover .wordmark { color: var(--accent); transition: color 0.15s; }
.site-nav .nav-links {
  display: flex; align-items: center; gap: 30px;
  font-family: var(--f-mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--ink-3);
}
.site-nav .nav-links a:hover { color: var(--ink); }
.site-nav .nav-actions {
  display: flex; align-items: center; gap: 10px;
}
.site-nav .nav-actions .signin {
  font-family: var(--f-mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--ink-3);
  padding: 0 8px;
}
.site-nav .nav-actions .signin:hover { color: var(--ink); }

/* Language selector in nav */
.site-nav .lang-select {
  appearance: none; -webkit-appearance: none;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: var(--radius-sm);
  height: 32px; padding: 0 24px 0 26px;
  font-family: var(--f-mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--ink-3);
  cursor: pointer;
  background-image:
    url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='13' height='13' viewBox='0 0 24 24' fill='none' stroke='%236A6A6A' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cline x1='2' y1='12' x2='22' y2='12'/%3E%3Cpath d='M12 2a15.3 15.3 0 0 1 4 10 15.3 15.3 0 0 1-4 10 15.3 15.3 0 0 1-4-10 15.3 15.3 0 0 1 4-10z'/%3E%3C/svg%3E"),
    url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6' fill='none' stroke='%236A6A6A' stroke-width='1.4'%3E%3Cpath d='M1 1 L5 5 L9 1'/%3E%3C/svg%3E");
  background-repeat: no-repeat, no-repeat;
  background-position: left 8px center, right 8px center;
}
.site-nav .lang-select:hover { color: var(--ink); border-color: var(--line-2); }

/* ─── 5. Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  height: 32px; padding: 0 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--ink); background: var(--ink); color: var(--paper);
  font-weight: 600; font-size: 12.5px; cursor: pointer;
  letter-spacing: 0.005em;
  white-space: nowrap; flex-shrink: 0;
  text-decoration: none;
}
.btn:hover { background: var(--ink-2); border-color: var(--ink-2); }
.btn.ghost { background: var(--paper); color: var(--ink); border-color: var(--line-2); }
.btn.ghost:hover { background: var(--paper-3); }
.btn.accent { background: var(--accent); border-color: var(--accent); color: white; }
.btn.accent:hover { filter: brightness(0.96); }
.btn.sm { height: 26px; padding: 0 10px; font-size: 11.5px; }
.btn.md { height: 40px; padding: 0 18px; font-size: 13px; }
.btn.lg { height: 44px; padding: 0 22px; font-size: 13.5px; }

/* ─── 6. Footer (matches landing page .site-foot) ─────────── */
.site-foot {
  border-top: 1px solid var(--line);
  padding: 36px 56px 28px;
  display: grid; grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 32px;
  background: var(--paper);
  font-family: var(--f-sans); font-size: 12.5px; color: var(--ink-3);
  margin-top: auto;
}
.site-foot .foot-col-head {
  font-family: var(--kicker-family); font-size: var(--kicker-size);
  text-transform: var(--kicker-case); letter-spacing: var(--kicker-tracking);
  color: var(--ink-3);
  margin: 0 0 14px;
}
.site-foot ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; color: var(--ink-2); }
.site-foot ul a:hover { color: var(--ink); }
.site-foot .colophon {
  grid-column: 1 / -1; padding-top: 24px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--kicker-family); font-size: var(--kicker-size);
  text-transform: var(--kicker-case); letter-spacing: var(--kicker-tracking); color: var(--ink-4);
  margin-top: 12px;
}

/* Tablet (≤1024px) */
@media (max-width: 1024px) {
  .site-page { border-left: 0; border-right: 0; }
  .site-nav { padding: 14px 28px; }
  .site-nav .nav-links { gap: 18px; font-size: 10.5px; }
  .site-foot { grid-template-columns: 1fr 1fr; padding: 32px 28px; gap: 24px; }
}

/* Mobile (≤640px) */
@media (max-width: 640px) {
  .site-nav { flex-wrap: wrap; gap: 12px; padding: 12px 18px; }
  .site-nav .nav-links { display: none; }
  .site-nav .nav-actions { gap: 8px; }
  .site-nav .nav-actions .signin { display: none; }
  .site-nav .nav-actions .btn { font-size: 11.5px; height: 32px; padding: 0 12px; }
  .site-foot { grid-template-columns: 1fr 1fr; padding: 28px 18px 22px; gap: 22px; }
  .site-foot > div:first-child { grid-column: 1 / -1; }
  .site-foot .colophon { flex-direction: column; gap: 8px; align-items: flex-start; }
}

/* ─── 7. (reserved) ───────────────────────────────────────── */

/* ─── 8. Main content wrapper ─────────────────────────────── */
.site-main { flex: 1; padding-block: 3rem; }

/* ─── 9. Archive / Index page ─────────────────────────────── */
.archive-header {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.archive-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.archive-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  color: var(--text);
  line-height: 1.2;
}

.archive-desc {
  margin-top: 0.75rem;
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 48rem;
}

/* Post grid */
.post-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 640px)  { .post-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .post-grid { grid-template-columns: repeat(3, 1fr); } }

/* Post card */
.post-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.15s;
}
.post-card:hover { border-color: rgba(157,157,157,0.6); }

.post-card__thumbnail { display: block; aspect-ratio: 16/9; overflow: hidden; }
.post-card__thumbnail-img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s ease; }
.post-card:hover .post-card__thumbnail-img { transform: scale(1.03); }

.post-card__body { display: flex; flex-direction: column; flex: 1; padding: 1.5rem; gap: 0.75rem; }

.post-card__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.post-card__cat {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  transition: color 0.15s;
}
.post-card__cat:hover { color: var(--accent-dark); }

.post-card__date {
  font-size: 0.75rem;
  color: var(--text-subtle);
  margin-left: auto;
}

.post-card__title {
  font-size: 1.0625rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.4;
  color: var(--text);
}

.post-card__title-link { transition: color 0.15s; }
.post-card__title-link:hover { color: var(--accent); }

.post-card__excerpt {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  flex: 1;
}

.post-card__footer {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.375rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.post-card__tag {
  font-size: 0.75rem;
  color: var(--text-subtle);
  transition: color 0.15s;
}
.post-card__tag:hover { color: var(--accent); }

.post-card__readtime {
  font-size: 0.75rem;
  color: var(--text-subtle);
  margin-left: auto;
}

/* ─── 10. Pagination ──────────────────────────────────────── */
.pagination {
  margin-top: 3rem;
  display: flex;
  justify-content: center;
}

.pagination .nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.pagination .page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.25rem;
  height: 2.25rem;
  padding-inline: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: all 0.15s;
}

.pagination .page-numbers:hover { border-color: var(--border); color: var(--text); }
.pagination .page-numbers.current {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

/* ─── 11. Breadcrumb ──────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.breadcrumb__link { transition: color 0.15s; }
.breadcrumb__link:hover { color: var(--accent); }
.breadcrumb__sep { color: var(--text-subtle); }
.breadcrumb__current { color: var(--text-subtle); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 20rem; }

/* ─── 12. Article layout (single.php) ─────────────────────── */
.article-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

/* On desktop: article takes remaining width, ToC gets fixed column on right */
@media (min-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr var(--toc-w);
    gap: 4rem;
  }
  /* Article is first in DOM but visually on left */
  .post-article  { grid-column: 1; }
  .toc-sidebar   { grid-column: 2; }
}

/* ─── 13. Article (post-article) ──────────────────────────── */
.post-article { min-width: 0; }  /* prevent grid blowout */

/* --- Article header --- */
.article-header { margin-bottom: 2rem; }

.article-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.article-cat-chip {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  transition: color 0.15s;
}
.article-cat-chip:hover { color: var(--accent-dark); }

.article-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text);
  margin-bottom: 1.25rem;
}

.article-info {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.article-date,
.article-readtime { white-space: nowrap; }
.article-info-sep { color: var(--text-subtle); }

/* --- Featured image --- */
.article-thumbnail {
  margin-bottom: 2.5rem;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
}

.article-thumbnail-img { width: 100%; height: auto; }

.article-thumbnail-caption {
  padding: 0.625rem 1rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-align: center;
  background: var(--bg-card);
}

/* --- Article content typography --- */
.article-content {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text);
}

.article-content > * + * { margin-top: 1.5em; }

.article-content h2,
.article-content h3,
.article-content h4 {
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--text);
  margin-top: 2.5em;
  margin-bottom: 0.75em;
}

.article-content h2 {
  font-size: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.article-content h3 { font-size: 1.1875rem; }
.article-content h4 { font-size: 1rem; }

.article-content p { margin-top: 1.25em; }

.article-content a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: rgba(39,196,207,0.4);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.15s;
}
.article-content a:hover { text-decoration-color: var(--accent); }

.article-content strong { font-weight: 600; }
.article-content em     { font-style: italic; }

.article-content ul,
.article-content ol {
  padding-left: 1.5rem;
  margin-top: 1.25em;
}
.article-content li { margin-top: 0.4em; }

.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }

.article-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.75rem 1.25rem;
  margin-top: 1.5em;
  background: var(--bg-card);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-muted);
  font-style: italic;
}
.article-content blockquote p { margin-top: 0; }

.article-content code {
  font-family: 'SF Mono', 'Fira Mono', 'Consolas', monospace;
  font-size: 0.875em;
  background: var(--bg-card);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  color: var(--text);
}

.article-content pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  overflow-x: auto;
  margin-top: 1.5em;
}
.article-content pre code {
  background: none;
  padding: 0;
  font-size: 0.875rem;
  line-height: 1.6;
}

.article-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin-top: 2.5em;
}

.table-scroll-wrap {
  -webkit-overflow-scrolling: touch;
  margin-top: 1.5em;
}
.table-scroll-wrap table {
  width: auto;
  min-width: 100%;
  margin-top: 0;
}
@media (max-width: 639px) {
  .table-scroll-wrap--sm,
  .table-scroll-wrap--md,
  .table-scroll-wrap--lg { overflow-x: auto; }
}
@media (min-width: 640px) and (max-width: 1023px) {
  .table-scroll-wrap--md,
  .table-scroll-wrap--lg { overflow-x: auto; }
}
@media (min-width: 1024px) {
  .table-scroll-wrap--lg { overflow-x: auto; }
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  margin-top: 1.5em;
}
.article-content th,
.article-content td {
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--border);
  text-align: left;
}
.article-content th {
  background: var(--bg-card);
  font-weight: 500;
}

.article-content img {
  border-radius: var(--radius);
  margin-top: 1.5em;
}

/* WordPress alignment helpers */
.article-content .aligncenter { margin-inline: auto; }
.article-content .alignleft    { float: left; margin-right: 1.5rem; }
.article-content .alignright   { float: right; margin-left: 1.5rem; }
.article-content .wp-caption   { max-width: 100%; }
.article-content .wp-caption-text {
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 0.5rem;
}

/* --- Article footer --- */
.article-footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.article-tags {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.article-tags-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-right: 0.25rem;
}

.article-tag {
  font-size: 0.8125rem;
  color: var(--text-muted);
  padding: 0.25rem 0.625rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.15s;
}
.article-tag:hover { border-color: var(--accent); color: var(--accent); }

.article-nav {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
@media (min-width: 640px) { .article-nav { grid-template-columns: 1fr 1fr; } }

.article-nav-prev,
.article-nav-next {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.15s;
}
.article-nav-prev:hover,
.article-nav-next:hover { border-color: rgba(157,157,157,0.6); }

.article-nav-next { text-align: right; }

.article-nav-dir {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.02em;
}

.article-nav-title {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.4;
  letter-spacing: -0.01em;
}

/* ─── 14. Table of Contents ────────────────────────────────── */

/* Hidden on mobile — the sidebar grid column collapses on small screens */
.toc-sidebar { display: none; }

@media (min-width: 1024px) {
  .toc-sidebar { display: block; }
}

.toc-sticky {
  position: sticky;
  top: calc(var(--header-h) + 2rem);
  max-height: calc(100vh - var(--header-h) - 4rem);
  overflow-y: auto;
  /* Hide scrollbar visually but keep functionality */
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.toc-sticky::-webkit-scrollbar        { width: 4px; }
.toc-sticky::-webkit-scrollbar-track  { background: transparent; }
.toc-sticky::-webkit-scrollbar-thumb  { background: var(--border); border-radius: 2px; }

.toc-heading {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-subtle);
  margin-bottom: 0.875rem;
}

.toc-nav { font-size: 0.875rem; }

/* Top-level list */
.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* H2 items */
.toc-h2-item { position: relative; }

.toc-h2-item > .toc-link {
  display: block;
  padding: 0.375rem 0.5rem;
  color: var(--text-muted);
  border-radius: var(--radius);
  line-height: 1.5;
  transition: color 0.15s, background 0.15s;
}

.toc-h2-item > .toc-link:hover {
  color: var(--text);
  background: var(--bg-card);
}

/* Active H2 */
.toc-h2-item--active > .toc-link {
  color: var(--text);
  font-weight: 500;
  background: var(--bg-card);
}

/* H3 sub-list — collapsed by default using CSS grid trick */
.toc-h3-list {
  list-style: none;
  display: grid;
  grid-template-rows: 0fr;   /* explicit row collapsed */
  grid-auto-rows: 0fr;       /* implicit rows collapsed too — without this only the 1st H3 hides */
  transition: grid-template-rows 0.22s ease, grid-auto-rows 0.22s ease;
  padding-left: 0.875rem;
  border-left: 1px solid var(--border);
  margin-left: 0.5rem;
}

/* Inner wrapper needed for grid-template-rows animation */
.toc-h3-list > * { overflow: hidden; }

/* Expanded state */
.toc-h3-list--open {
  grid-template-rows: 1fr;   /* explicit row expanded */
  grid-auto-rows: 1fr;       /* implicit rows expanded too */
}

.toc-h3-item .toc-link {
  display: block;
  padding: 0.3rem 0.5rem;
  color: var(--text-subtle);
  border-radius: var(--radius);
  line-height: 1.5;
  transition: color 0.15s;
}
.toc-h3-item .toc-link:hover { color: var(--accent); }

/* Active H3 — primary brand colour while reader is in this subsection */
.toc-h3-item--active > .toc-link {
  color: var(--accent);
  font-weight: 500;
}

/* ─── 15. Search page ─────────────────────────────────────── */
.search-query { color: var(--accent); }

.search-form-wrapper { margin-top: 1rem; }

/* WordPress search form */
.search-form { display: flex; gap: 0.5rem; max-width: 30rem; }

.search-form label { flex: 1; }

.search-field {
  width: 100%;
  padding: 0.625rem 0.875rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font: inherit;
  font-size: 0.9375rem;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
}
.search-field:focus { border-color: rgba(157,157,157,0.6); }

.search-submit {
  padding: 0.625rem 1.25rem;
  background: var(--text);
  color: var(--bg);
  border: none;
  border-radius: var(--radius);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}
.search-submit:hover { background: var(--accent); }

/* ─── 16. 404 page ────────────────────────────────────────── */
.error-404 {
  text-align: center;
  max-width: 36rem;
  margin-inline: auto;
  padding-block: 5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

.error-404__code {
  font-size: clamp(5rem, 15vw, 8rem);
  font-weight: 500;
  letter-spacing: -0.06em;
  color: var(--bg-card);
  line-height: 1;
}

.error-404__title {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.error-404__desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.error-404__actions { margin-top: 0.5rem; }

/* ─── 17. No-results ──────────────────────────────────────── */
.no-results {
  max-width: 36rem;
  padding-block: 4rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.no-results__title {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.no-results__text {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ─── 18. WordPress core widget / block resets ─────────────── */
.wp-block-image figcaption,
.gallery-caption {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Screen-reader utility */
.screen-reader-text {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ─── Article in-content ad ─────────────────────────────────────── */
.article-ad {
  display: block;
  margin: 2.5rem auto;
  text-align: center;
  text-decoration: none;
  line-height: 0;
}
.article-ad picture,
.article-ad img {
  display: block;
  margin-inline: auto;
  max-width: 100%;
  height: auto;
}
.article-ad img {
  border-radius: 8px;
  transition: opacity 0.2s ease;
}
.article-ad:hover img,
.article-ad:focus-visible img {
  opacity: 0.9;
}
.article-ad:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 4px;
  border-radius: 8px;
}
@media (min-width: 768px) {
  .article-ad {
    margin: 3rem auto;
  }
}