/* ── Design tokens & reset ──────────────────────────────────── */

:root {
  --color-accent:       #2563eb;
  --color-accent-dark:  #1d4ed8;
  --color-bg:           #f8fafc;
  --color-bg-secondary: #f1f5f9;
  --color-bg-white:     #ffffff;
  --color-text:         #1e293b;
  --color-text-sub:     #475569;
  --color-text-muted:   #94a3b8;
  --color-border:       #e2e8f0;
  --color-border-light: #f1f5f9;
  --color-brand-dark:   #1e293b;
  --color-success:      #16a34a;
  --color-warning:      #d97706;
  --color-error:        #dc2626;
  --font-body:    'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --font-heading: 'Noto Sans JP', 'Hiragino Sans', sans-serif;
  --font-mono:    'SFMono-Regular', 'Consolas', 'Menlo', monospace;
  --transition:   0.3s cubic-bezier(0.4, 0.4, 0, 1);
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

/* ── フォントメトリクス補正（CLS軽減） ───────────────────────── */
@font-face {
  font-family: 'Noto Sans JP Fallback';
  src: local('Hiragino Sans'), local('Yu Gothic Medium'), local('Meiryo'), local('Arial');
  ascent-override: 88%; descent-override: 22%; line-gap-override: 0%; size-adjust: 105%;
}

body {
  margin: 0;
  padding: 0;
  background: var(--color-bg-white);
  font-family: 'Noto Sans JP', 'Noto Sans JP Fallback', 'Hiragino Sans', sans-serif;
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.7;
  letter-spacing: 0.02em;
  overflow-wrap: break-word;
  line-break: strict;
}

/* ── Header ─────────────────────────────────────────────────── */
header {
  background: var(--color-bg-white);
  border-bottom: 1px solid var(--color-border-light);
  padding: 1.25rem 1.5rem;
}
.header-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.site-title:hover { color: var(--color-text); }
.site-title span  { color: var(--color-accent); }
header nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
header nav a {
  font-size: 0.8rem;
  color: var(--color-text-sub);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color var(--transition);
}
header nav a:hover { color: var(--color-accent); }

/* ── Footer ─────────────────────────────────────────────────── */
footer {
  text-align: center;
  padding: 2rem 1rem;
  font-size: .75rem;
  color: var(--color-text-muted);
}
footer a { color: var(--color-text-muted); text-decoration: none; }
footer a:hover { color: var(--color-accent); }

/* ── Article layout ─────────────────────────────────────────── */
.article-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

/* ── Article header ─────────────────────────────────────────── */
.article-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}
.article-title {
  font-family: var(--font-heading);
  font-size: 1.8125rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: var(--color-brand-dark);
  margin: 0 0 0.75rem;
  word-break: auto-phrase;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8125rem;
  color: var(--color-text-sub);
}
.article-meta time { font-variant-numeric: tabular-nums; }
.article-reading-time-sep { color: var(--color-text-muted); }
.article-tags { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-left: auto; }
.article-tag {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  background: var(--color-bg-secondary);
  border-radius: 50px;
  font-size: 0.75rem;
  color: var(--color-text-sub);
  text-decoration: none;
}
.article-tag--cat {
  background: color-mix(in srgb, var(--color-accent) 10%, transparent);
  color: var(--color-accent);
  font-weight: 700;
  transition: background 0.2s;
}
.article-tag--cat:hover {
  background: color-mix(in srgb, var(--color-accent) 20%, transparent);
}

/* ── Breadcrumb ─────────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}
.breadcrumb a { color: var(--color-accent); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb-sep { color: var(--color-border); }

/* ── Table of contents ──────────────────────────────────────── */
.toc {
  background: var(--color-bg-secondary);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 8px 8px 0;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  font-size: 0.875rem;
}
.toc-title {
  font-weight: 700;
  margin: 0 0 0.5rem;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-sub);
}
.toc ol, .toc ul { margin: 0; padding-left: 1.25rem; }
.toc li { margin: 0.25rem 0; }
.toc a { color: var(--color-text); text-decoration: none; }
.toc a:hover { color: var(--color-accent); }
.toc .toc-h3 { font-size: 0.8125rem; color: var(--color-text-sub); margin-left: 1.25em; }

/* ── Article body ───────────────────────────────────────────── */
.article-body {
  line-height: 1.85;
  letter-spacing: 0.02em;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.article-body h2 {
  font-size: 1.1875rem;
  font-weight: 700;
  margin: 2.25rem 0 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-brand-dark);
}
.article-body h3 {
  font-size: 1.0625rem;
  font-weight: 700;
  margin: 1.75rem 0 0.5rem;
  color: var(--color-brand-dark);
}
.article-body h4 {
  font-size: 1rem;
  font-weight: 700;
  margin: 1.5rem 0 0.4rem;
}
.article-body p    { margin: 0 0 1rem; }
.article-body ul, .article-body ol { margin: 0 0 1rem; padding-left: 1.5rem; }
.article-body li   { margin: 0.3rem 0; }
.article-body li ul, .article-body li ol { margin-bottom: 0; }
.article-body blockquote {
  margin: 1rem 0;
  padding: 0.75rem 1rem;
  border-left: 3px solid var(--color-accent);
  background: var(--color-bg-secondary);
  border-radius: 0 8px 8px 0;
  color: var(--color-text-sub);
  font-style: italic;
}
.article-body hr { border: none; border-top: 1px solid var(--color-border); margin: 2rem 0; }
.article-body img { max-width: 100%; height: auto; border-radius: 8px; margin: 0.5rem 0; }
.article-body a { color: var(--color-accent); }
.article-body a:hover { text-decoration: underline; }
.article-body strong { font-weight: 700; color: var(--color-brand-dark); }

/* ── Code ───────────────────────────────────────────────────── */
.article-body code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-bg-secondary);
  padding: 0.1em 0.4em;
  border-radius: 4px;
  border: 1px solid var(--color-border-light);
}
.article-body pre {
  background: #0f172a;
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
  overflow-x: auto;
  margin: 1rem 0;
  line-height: 1.6;
}
.article-body pre code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  background: none;
  border: none;
  padding: 0;
  color: #e2e8f0;
}

/* ── Table ──────────────────────────────────────────────────── */
.article-body .table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 1rem 0; }
.article-body table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
.article-body th {
  background: var(--color-bg-secondary);
  font-weight: 700;
  text-align: left;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--color-border);
}
.article-body td { padding: 0.5rem 0.75rem; border: 1px solid var(--color-border-light); vertical-align: top; }

/* ── Related links ──────────────────────────────────────────── */
.related-tools {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}
.related-tools-title {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-sub);
  margin: 0 0 0.75rem;
}
.related-tools-list { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.related-tool-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.9rem;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  font-size: 0.8125rem;
  color: var(--color-text);
  text-decoration: none;
  transition: all var(--transition);
}
.related-tool-link:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* ── .md source link ────────────────────────────────────────── */
.md-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  color: var(--color-text-sub);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color var(--transition);
}
.md-link:hover { color: var(--color-accent); }
.md-link svg { width: 13px; height: 13px; flex-shrink: 0; }

/* ── Prev/next nav ──────────────────────────────────────────── */
.article-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}
.article-nav a {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.75rem 1rem;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  text-decoration: none;
  transition: border-color var(--transition);
}
.article-nav a:hover { border-color: var(--color-accent); }
.article-nav-label { font-size: 0.75rem; color: var(--color-text-muted); }
.article-nav-title { font-size: 0.875rem; color: var(--color-text); font-weight: 400; }
.article-nav .next { text-align: right; }
.article-nav .prev:empty, .article-nav .next:empty { visibility: hidden; }

/* ── Article list ───────────────────────────────────────────── */
.article-list { display: flex; flex-direction: column; gap: 1rem; }
.article-card {
  display: block;
  padding: 1.25rem 1.5rem;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border-light);
  border-radius: 16px;
  text-decoration: none;
  box-shadow: 3px 3px 30px -5px rgba(0,0,0,.06);
  transition: border-color var(--transition);
}
.article-card:hover { border-color: var(--color-accent); }
.article-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 0.35rem;
  line-height: 1.5;
}
.article-card-desc {
  font-size: 0.9375rem;
  color: var(--color-text-sub);
  margin: 0 0 0.5rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-card-meta {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

/* ── Category filter ────────────────────────────────────────── */
.tag-filter { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.25rem; }
.tag-filter-item {
  display: inline-block;
  padding: 0.3rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-text-sub);
  text-decoration: none;
  background: var(--color-bg-white);
  min-height: 32px;
  line-height: 1.6;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.tag-filter-item:not(.is-active):hover { border-color: var(--color-accent); color: var(--color-accent); }
.tag-filter-item.is-active { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }
.tag-filter-note { font-size: 0.875rem; color: var(--color-text-sub); margin: 0 0 1rem; }
.tag-filter-note a { color: var(--color-accent); text-decoration: none; }
.tag-filter-note a:hover { text-decoration: underline; }

/* ── Pagination ─────────────────────────────────────────────── */
.pagination {
  display: flex;
  justify-content: center;
  gap: 0.35rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}
.pagination a, .pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 0.6rem;
  border-radius: 8px;
  font-size: 0.875rem;
  text-decoration: none;
}
.pagination a { border: 1px solid var(--color-border); color: var(--color-text); }
.pagination a:hover { border-color: var(--color-accent); color: var(--color-accent); }
.pagination .current { background: var(--color-accent); color: #fff; font-weight: 700; }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 600px) {
  .article-container { padding: 1.5rem 1rem; }
  .article-title { font-size: 1.375rem; }
  .article-tags { margin-left: 0; }
  .article-nav { grid-template-columns: 1fr; }
  .article-nav .next { text-align: left; }
}

/* ── IKG FAS site integration ─────────────────────────────── */
:root {
  --color-accent: #35528c;
  --color-accent-dark: #1f2e54;
  --color-bg: #fff;
  --color-bg-secondary: #f1f4f7;
  --color-bg-white: #fff;
  --color-text: #3a4047;
  --color-text-sub: #60656c;
  --color-text-muted: #83878e;
  --color-border: #dee0e4;
  --color-border-light: #eef0f2;
  --color-brand-dark: #1f2e54;
  --font-body: "Noto Sans JP", "Yu Gothic UI", sans-serif;
  --font-heading: "Noto Serif JP", serif;
  --transition: .2s ease;
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.95;
  letter-spacing: 0;
  color: var(--color-text);
}
.wrap { max-width: 1000px; margin: 0 auto; padding-left: 28px; padding-right: 28px; }

body > header {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: 0;
  background: #fff;
  border-bottom: 1px solid var(--color-brand-dark);
}
.header-inner {
  max-width: 1000px;
  min-height: 68px;
  align-items: baseline;
  gap: 16px;
}
.site-title {
  font-family: "Montserrat", "Inter", sans-serif;
  font-size: 22px;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--color-brand-dark);
  white-space: nowrap;
}
.site-title:hover { color: var(--color-brand-dark); }
body > header nav { gap: 26px; flex-wrap: wrap; }
body > header nav a {
  font-size: 13.5px;
  color: var(--color-brand-dark);
  letter-spacing: .06em;
}
body > header nav a:hover,
body > header nav a[aria-current="page"] { color: var(--color-accent); }
.lang { font-family: "Inter", sans-serif; font-size: 12px; letter-spacing: .12em; color: var(--color-text-muted); }
.lang b { color: var(--color-brand-dark); font-weight: 600; }
.lang a { color: var(--color-text-muted); }

.article-container { max-width: 860px; padding: 60px 28px 84px; }
.breadcrumb { margin-bottom: 36px; font-size: 12px; }
.breadcrumb a { color: var(--color-text-muted); }
.eyebrow {
  display: block;
  margin-bottom: 10px;
  font-family: "Inter", sans-serif;
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.listing-title,
.article-title {
  font-family: var(--font-heading);
  font-weight: 500;
  color: var(--color-brand-dark);
  letter-spacing: .08em;
}
.listing-title {
  margin: 0 0 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-brand-dark);
  font-size: 22px;
  line-height: 1.5;
}
.listing-lead { max-width: 41em; margin: 0 0 40px; }
.article-header { margin-bottom: 36px; padding-bottom: 24px; border-bottom-color: var(--color-brand-dark); }
.article-title { font-size: clamp(23px, 3vw, 31px); line-height: 1.65; }
.article-meta { font-family: "Inter", "Noto Sans JP", sans-serif; color: var(--color-text-muted); }
.article-tags { margin-left: 0; }
.article-tag,
.tag-filter-item { border-radius: 0; }
.article-tag--cat { color: var(--color-accent); }
.md-link { margin-left: auto; color: var(--color-text-muted); }

.article-list { gap: 0; border-top: 1px solid var(--color-border); }
.article-card {
  padding: 24px 0;
  border: 0;
  border-bottom: 1px solid var(--color-border);
  border-radius: 0;
  box-shadow: none;
}
.article-card:hover { border-color: var(--color-border); }
.article-card-title { color: var(--color-brand-dark); font-weight: 500; letter-spacing: .03em; }
.article-card:hover .article-card-title { color: var(--color-accent); }
.article-card-desc { color: var(--color-text); }
.tag-filter { margin-bottom: 30px; }
.tag-filter-item { font-weight: 500; }
.tag-filter-item.is-active { background: var(--color-brand-dark); border-color: var(--color-brand-dark); }

.article-body { line-height: 2; }
.article-body h2,
.article-body h3,
.article-body h4 { font-family: var(--font-heading); color: var(--color-brand-dark); }
.article-body h2 { margin-top: 3rem; padding-bottom: .65rem; border-bottom-color: var(--color-brand-dark); font-size: 21px; font-weight: 500; letter-spacing: .06em; }
.article-body h3 { margin-top: 2.25rem; font-size: 17px; font-weight: 600; letter-spacing: .05em; }
.toc { border-radius: 0; border-left-color: var(--color-brand-dark); }
.article-body blockquote { border-radius: 0; border-left-color: var(--color-brand-dark); }
.article-body img { border-radius: 0; }
.article-nav a { border-radius: 0; }

.author-profile {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 28px;
  align-items: start;
  margin-top: 64px;
  padding: 28px 0;
  border-top: 1px solid var(--color-brand-dark);
  border-bottom: 1px solid var(--color-border);
}
.author-profile img {
  display: block;
  width: 160px;
  height: 160px;
  object-fit: cover;
  filter: grayscale(1);
}
.author-profile p { margin-top: 0; }
.author-profile-label {
  margin-bottom: 7px;
  font-family: "Inter", sans-serif;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.author-profile-name {
  margin-bottom: 2px;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--color-brand-dark);
}
.author-profile-name span {
  margin-left: 10px;
  font-family: "Inter", sans-serif;
  font-size: 10px;
  font-weight: 400;
  letter-spacing: .12em;
  color: var(--color-text-muted);
}
.author-profile-title { margin-bottom: 12px; font-size: 12.5px; color: var(--color-text-muted); }
.author-profile-bio { margin-bottom: 0; font-size: 13px; line-height: 1.85; }

body > footer {
  margin-top: 12px;
  padding: 44px 0 34px;
  text-align: left;
  background: var(--color-brand-dark);
  color: #aebad3;
}
.footer-inner { line-height: 2; }
.footer-firm { margin: 0 0 6px; font-family: "Montserrat", sans-serif; font-size: 15px; letter-spacing: .12em; color: #fff; }
.footer-inner > p { margin-top: 0; }
.footer-end { margin-top: 26px !important; padding-top: 14px; border-top: 1px solid rgba(255,255,255,.22); font-family: "Inter", sans-serif; font-size: 11px; letter-spacing: .06em; color: #93a1be; }

@media (max-width: 760px) {
  .header-inner { padding-top: 14px; padding-bottom: 10px; align-items: center; flex-wrap: wrap; }
  body > header nav { gap: 14px; }
  body > header nav a { font-size: 12px; }
  .article-container { padding-top: 40px; }
}

@media (max-width: 560px) {
  .wrap { padding-left: 18px; padding-right: 18px; }
  .article-container { padding-left: 18px; padding-right: 18px; }
  .header-inner nav a:nth-child(1),
  .header-inner nav a:nth-child(2),
  .header-inner nav a:nth-child(4) { display: none; }
  .article-meta { align-items: flex-start; }
  .md-link { width: 100%; margin-left: 0 !important; }
  .author-profile { grid-template-columns: 1fr; gap: 20px; }
  .author-profile img { width: 132px; height: 132px; }
}

/* ── IKG FAS fixed visual system ───────────────────────────── */
:root {
  --color-accent: #35528c;
  --color-bg: #ffffff;
  --color-bg-secondary: #f6f7f8;
  --color-bg-white: #ffffff;
  --color-text: #3a4047;
  --color-text-sub: #666b72;
  --color-text-muted: #83878e;
  --color-border: #dee0e4;
  --color-border-light: #eef0f2;
  --color-brand-dark: #1f2e54;
  --font-heading: "Noto Serif JP", "Yu Mincho", serif;
}
body { background:#fff; font-size:14px; line-height:2; letter-spacing:.045em; }
body > header { padding:0; border:0; background:#fff; }
.header-inner {
  width:100%;max-width:none;padding:44px clamp(20px,5vw,72px) 0;
  align-items:baseline;gap:32px;
}
.site-title {
  font-family:var(--font-heading);font-size:21px;font-weight:500;
  letter-spacing:.09em;color:var(--color-brand-dark);
}
body > header nav { justify-content:flex-end;gap:clamp(22px,3vw,48px); }
body > header nav a { font-size:12px;letter-spacing:.08em;color:var(--color-brand-dark); }
.lang { font-size:12px; }

.article-container { width:100%;max-width:1120px;padding:clamp(104px,11vw,160px) clamp(20px,5vw,72px) 140px; }
.breadcrumb { margin:0 0 52px;font-size:10px;letter-spacing:.08em; }
.eyebrow { margin:0 0 12px;font-size:9px;letter-spacing:.28em; }
.listing-title {
  margin:0;padding:0;border:0;font-size:clamp(30px,3vw,42px);font-weight:400;
  line-height:1.65;letter-spacing:.1em;
}
.listing-title::after { content:"";display:block;width:28px;height:1px;margin:36px 0;background:var(--color-brand-dark); }
.listing-lead { max-width:720px;margin:0 0 64px;font-size:13px;line-height:2.15;letter-spacing:.055em; }
.tag-filter { display:flex;gap:0;margin:0 0 44px;border-bottom:1px solid var(--color-border); }
.tag-filter-item {
  padding:9px 18px;border:0;background:transparent;font-size:10px;font-weight:400;
  letter-spacing:.1em;color:var(--color-text-muted);
}
.tag-filter-item.is-active { background:transparent;border-bottom:1px solid var(--color-brand-dark);color:var(--color-brand-dark); }
.article-list { border-top:1px solid var(--color-border); }
.article-card { position:relative;padding:30px 0 32px; }
.article-card-title {
  max-width:820px;margin:0 0 10px;font-family:var(--font-heading);
  font-size:18px;font-weight:400;line-height:1.75;letter-spacing:.055em;
}
.article-card-desc { max-width:760px;margin:0 0 12px;font-size:12.5px;line-height:1.9; }
.article-card-meta { font-size:9.5px;letter-spacing:.08em;color:var(--color-text-muted); }
.article-tag { padding:0;background:transparent;font-size:9.5px; }

/* individual article */
.article-header,.article-body,.author-profile,.related-tools,.article-nav { max-width:760px;margin-left:auto;margin-right:auto; }
.article-header { margin-bottom:56px;padding:0 0 28px;border-bottom:1px solid var(--color-brand-dark); }
.article-title {
  margin:0 0 26px;font-size:clamp(26px,3.2vw,38px);font-weight:400;
  line-height:1.7;letter-spacing:.075em;
}
.article-meta { gap:10px;font-size:10px;letter-spacing:.07em; }
.article-tag--cat { background:transparent;font-weight:400; }
.article-body { line-height:2.15;letter-spacing:.045em; }
.article-body p { margin:0 0 1.6em; }
.article-body h2 {
  margin:4.5rem 0 1.35rem;padding:18px 0 12px;border-top:1px solid var(--color-brand-dark);
  border-bottom:0;font-size:23px;font-weight:400;line-height:1.7;letter-spacing:.075em;
}
.article-body h3 { margin:3rem 0 1rem;font-size:18px;font-weight:500;line-height:1.8; }
.article-body h4 { font-size:15px;font-weight:500; }
.toc { margin:2.5rem 0 3rem;padding:20px 24px;border:0;border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border);background:#fff; }
.toc-title { font-size:9px;font-weight:500;letter-spacing:.18em; }
.toc li { margin:.55rem 0; }
.article-body blockquote { padding:18px 22px;border-left:1px solid var(--color-brand-dark);background:var(--color-bg-secondary);font-style:normal; }
.article-body table { font-size:12px; }
.article-body th { padding:10px 12px;background:var(--color-bg-secondary);font-weight:500; }
.article-body td { padding:10px 12px; }
.article-nav { gap:0;margin-top:72px;padding-top:0;border-top:1px solid var(--color-brand-dark); }
.article-nav a { padding:22px 0;border:0;border-bottom:1px solid var(--color-border); }
.article-nav .next a { padding-left:24px; }
.article-nav .prev a { padding-right:24px; }
.author-profile { margin-top:80px;padding:30px 0;grid-template-columns:140px 1fr;gap:30px; }
.author-profile img { width:140px;height:176px;object-position:center top; }
.author-profile-name { font-weight:400; }
.related-tool-link { padding:8px 0;border:0;border-bottom:1px solid var(--color-border); }

body > footer {
  margin:0;padding:40px clamp(20px,5vw,72px) 34px;background:#fff;color:var(--color-text);
  border-top:1px solid var(--color-brand-dark);
}
body > footer .wrap { width:100%;max-width:none;padding:0; }
.ft { display:grid;grid-template-columns:18% 1fr;font-size:10px;line-height:1.9;color:var(--color-text-muted); }
.ft .firm { font-family:var(--font-heading);font-size:16px;font-weight:400;letter-spacing:.1em;color:var(--color-brand-dark); }
.ft-end {
  margin:32px 0 0 18%;padding-top:14px;border-top:1px solid var(--color-border);
  display:flex;justify-content:space-between;align-items:center;gap:24px;
  font-size:9px;color:var(--color-text-muted);
}
body > footer a { color:var(--color-text); }

@media (max-width: 760px) {
  .header-inner { padding:28px 20px 0;align-items:flex-start; }
  body > header nav { gap:16px 22px; }
  .article-container { padding-top:88px; }
  .ft { grid-template-columns:120px 1fr; }
  .ft-end { margin-left:120px; }
}
@media (max-width: 560px) {
  .header-inner { position:relative;display:block;padding:22px 20px 0; }
  body > header nav { margin-top:20px;justify-content:flex-start;gap:12px 20px; }
  body > header nav a { font-size:11px; }
  .header-inner .lang { position:absolute;top:25px;right:20px; }
  .article-container { padding:72px 20px 104px; }
  .breadcrumb { margin-bottom:40px; }
  .listing-title { font-size:30px; }
  .listing-lead { margin-bottom:48px; }
  .tag-filter { overflow-x:auto;white-space:nowrap; }
  .tag-filter-item { padding-left:12px;padding-right:12px; }
  .article-card-title { font-size:16px; }
  .article-title { font-size:26px; }
  .article-header { margin-bottom:42px; }
  .article-body h2 { margin-top:3.5rem;font-size:20px; }
  .author-profile { grid-template-columns:1fr;gap:22px; }
  .author-profile img { width:132px;height:166px; }
  .article-nav { grid-template-columns:1fr; }
  .article-nav .next a { padding-left:0; }
  .article-nav .prev a { padding-right:0; }
  body > footer { padding:34px 20px 28px; }
  .ft { display:block; }
  .ft .firm { margin-bottom:18px; }
  .ft-end { margin-left:0; }
}

/* article header: same compact visual system as the top-page sticky header */
body > header {
  position:sticky;top:0;z-index:30;margin:0;padding:0;
  background:rgba(255,255,255,.94);border:0;border-bottom:1px solid var(--color-border);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
}
body > header .header-inner {
  width:100%;max-width:none;min-height:0;height:56px;margin:0;
  padding:0 clamp(20px,5vw,72px);display:flex;align-items:center;
  justify-content:space-between;gap:32px;
}
body > header .site-title {
  font-family:var(--font-heading);font-size:16px;font-weight:500;
  letter-spacing:.1em;color:var(--color-brand-dark);
}
body > header nav { margin:0;align-items:center;justify-content:flex-end;gap:clamp(22px,3vw,48px); }
body > header nav > a { font-size:10.5px;letter-spacing:.08em; }
body > header .lang { position:static;font-size:10.5px; }
body > header nav > a { position:relative; }
body > header nav > a::after {
  content:"";position:absolute;left:0;right:0;bottom:-5px;height:1px;
  background:currentColor;transform:scaleX(0);transform-origin:right;
  transition:transform .24s cubic-bezier(.22,1,.36,1);
}
body > header nav > a:hover::after,
body > header nav > a:focus-visible::after,
body > header nav > a[aria-current="page"]::after { transform:scaleX(1);transform-origin:left; }
.article-container { animation:article-enter .52s cubic-bezier(.22,1,.36,1) both; }
@keyframes article-enter {
  from { opacity:0;transform:translateY(8px); }
  to { opacity:1;transform:none; }
}

@media (max-width: 560px) {
  body > header .header-inner { height:52px;padding:0 20px;display:flex;align-items:center; }
  body > header nav { margin:0;display:flex;align-items:center; }
  body > header nav > a { display:none; }
  body > header .lang { position:static; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior:auto; }
  .article-container { animation:none; }
  body > header nav > a::after { transition:none; }
}