.blog-index-hero {
  padding-block: 4rem 3rem;
}

.blog-index-hero .wrap {
  padding-block: 3rem;
  border-radius: var(--radius-banner);
  background: var(--color-ink-panel);
  box-shadow: var(--shadow-banner);
}

.blog-index-hero .eyebrow {
  color: var(--color-accent);
}

.blog-index-hero h1 {
  max-width: 24ch;
  margin-block: 0.75rem 1rem;
  color: var(--color-on-dark);
  font-family: var(--font-display);
  font-size: clamp(1.875rem, 1.35rem + 2vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.035em;
}

.blog-index-lead {
  max-width: 48rem;
  margin: 0;
  color: var(--color-on-dark-soft);
  font-size: clamp(1rem, 0.94rem + 0.3vw, 1.125rem);
  line-height: 1.75;
}

.blog-catalog {
  padding-block: 1rem var(--section-space);
}

.blog-catalog-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2rem;
}

.blog-catalog-head h2 {
  margin-block: 0.5rem 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 1.25rem + 0.8vw, 2rem);
  line-height: 1.25;
}

.blog-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
}

.blog-filter-button {
  min-height: 2.5rem;
  padding-inline: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface-raised);
  color: var(--color-text-muted);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 650;
  cursor: pointer;
  transition:
    border-color 160ms ease,
    background-color 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.blog-filter-button:hover {
  border-color: var(--color-accent-strong);
  color: var(--color-text);
  transform: translateY(-1px);
}

.blog-filter-button:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.blog-filter-button[aria-pressed="true"] {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-text);
}

.blog-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.post-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.post-card-meta,
.related-card-meta,
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.5;
}

.post-card h3 {
  margin-block: 1rem 0.75rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 1.02rem + 0.35vw, 1.375rem);
  line-height: 1.4;
}

.post-card p {
  margin: 0 0 1.25rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

.post-card-link {
  align-self: flex-start;
  margin-top: auto;
  color: var(--color-accent-strong);
  font-weight: 700;
  text-decoration: none;
}

.post-card-link:hover {
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

.blog-empty {
  padding: 2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-surface);
  color: var(--color-text-muted);
  text-align: center;
}

.blog-breadcrumb,
nav.breadcrumb,
nav.breadcrumbs {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.25rem;
  margin-bottom: 1.25rem;
  overflow: hidden;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  line-height: 1.5;
  white-space: nowrap;
}

.blog-breadcrumb a,
nav.breadcrumb a,
nav.breadcrumbs a {
  flex: 0 0 auto;
  color: var(--color-text-muted);
  opacity: 0.6;
  text-decoration: none;
}

.blog-breadcrumb a:hover,
nav.breadcrumb a:hover,
nav.breadcrumbs a:hover {
  color: var(--color-accent-strong);
  opacity: 1;
}

.blog-breadcrumb .breadcrumb-separator,
nav.breadcrumb .breadcrumb-separator,
nav.breadcrumbs .breadcrumb-separator {
  flex: 0 0 auto;
  opacity: 0.35;
}

.blog-breadcrumb [aria-current="page"],
nav.breadcrumb [aria-current="page"],
nav.breadcrumbs [aria-current="page"] {
  min-width: 0;
  max-width: 30ch;
  flex: 0 1 auto;
  overflow: hidden;
  color: var(--color-text-muted);
  text-overflow: ellipsis;
}

.article-page,
.article-shell {
  padding-top: 0;
}

.article-page > .section:first-child,
.article-shell > .section:first-child,
.article-breadcrumb-section {
  padding-top: 2rem;
  padding-bottom: 0;
}

.article-hero {
  padding-block: 0.75rem 2rem;
}

.article-hero .article-meta {
  margin-bottom: 0.875rem;
}

.article-hero h1 {
  max-width: 100%;
  margin-block: 0 0.75rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2rem);
  line-height: 1.32;
  letter-spacing: -0.025em;
}

.article-lead {
  max-width: 100%;
  margin-top: 0.75rem;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: clamp(0.9375rem, 0.85rem + 0.45vw, 1.125rem);
  line-height: 1.7;
}

.article-body {
  padding-block: 0 3rem;
}

.prose {
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1.85;
}

.prose > :first-child {
  margin-top: 0;
}

.prose > :last-child {
  margin-bottom: 0;
}

.prose p,
.prose ul,
.prose ol,
.prose blockquote,
.prose pre,
.prose .table-wrap {
  margin-block: 1rem;
}

.prose h2 {
  margin-block: 0 1rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.375rem, 1.25rem + 0.45vw, 1.5rem);
  line-height: 1.35;
}

.prose h2 ~ h2 {
  margin-top: 2.5rem;
}

.prose h3 {
  margin-block: 1.75rem 0.75rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 1.05rem + 0.3vw, 1.25rem);
  line-height: 1.4;
}

.prose > section {
  padding: 0;
}

.prose > section + section {
  margin-top: 3rem;
}

.prose > section h2:first-child {
  margin-top: 0;
}

.prose ul,
.prose ol {
  padding-left: 1.5rem;
}

.prose li + li {
  margin-top: 0.5rem;
}

.prose blockquote {
  padding: 1rem 1.25rem;
  border-left: 0.25rem solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--color-surface);
  color: var(--color-text-muted);
}

.prose pre {
  max-width: 100%;
  padding: 1.25rem;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-ink-panel);
  color: var(--color-on-dark);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.7;
}

.prose code {
  overflow-wrap: anywhere;
  font-family: var(--font-mono);
}

.prose :not(pre) > code {
  padding: 0.15em 0.4em;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-surface);
  color: var(--color-accent-strong);
  font-size: 0.9em;
}

.prose a:not([class*="btn"]):not([class*="button"]) {
  color: var(--color-accent-strong);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

.prose a:not([class*="btn"]):not([class*="button"]):hover {
  color: var(--color-text);
}

.prose img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-card);
}

.prose .table-wrap,
.prose > .data-table {
  max-width: 100%;
  overflow-x: auto;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface-raised);
}

.prose th,
.prose td {
  padding: 0.875rem 1rem;
  border: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--color-surface);
  color: var(--color-text);
}

.article-download-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin-top: 3rem;
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.article-download-card h3 {
  margin-block: 0.375rem 0.5rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 1.375rem;
  line-height: 1.35;
}

.article-download-card p {
  margin: 0;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.article-download-card .button-row {
  flex: 0 0 auto;
}

.article-download-card .button--primary {
  color: var(--color-black);
}

#related-posts {
  margin-top: 3rem;
}

#related-posts > h2 {
  margin-block: 0 1.25rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1.35;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(18.75rem, 1fr));
  gap: 1rem;
}

.related-card {
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-surface);
}

.related-card h3 {
  margin-block: 0.875rem 0.625rem;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  line-height: 1.45;
}

.related-card h3 a {
  color: var(--color-text);
  text-decoration: none;
}

.related-card h3 a:hover {
  color: var(--color-accent-strong);
}

.related-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

#post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-block: 2rem 3rem;
}

.post-nav-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-surface-raised);
  color: var(--color-text);
  text-decoration: none;
  transition:
    border-color 160ms ease,
    transform 160ms ease,
    box-shadow 160ms ease;
}

.post-nav-card:hover {
  border-color: var(--color-accent-strong);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.post-nav-label {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.post-nav-card strong {
  font-size: 0.9375rem;
  line-height: 1.55;
}

@media (max-width: 52rem) {
  .blog-index-hero {
    padding-block: 2rem;
  }

  .blog-index-hero .wrap {
    padding-block: 2.25rem;
  }

  .blog-catalog-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 1.25rem;
  }

  .blog-list {
    grid-template-columns: 1fr;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .article-download-card {
    align-items: flex-start;
    flex-direction: column;
  }

  .article-download-card .button-row {
    width: 100%;
  }
}

@media (max-width: 40rem) {
  .blog-index-hero h1 {
    font-size: clamp(1.75rem, 1.45rem + 1.5vw, 1.875rem);
  }

  .blog-filter {
    width: 100%;
  }

  .blog-filter-button {
    flex: 1 1 auto;
  }

  .article-page > .section:first-child,
  .article-shell > .section:first-child,
  .article-breadcrumb-section {
    padding-top: 1.25rem;
  }

  .article-hero {
    padding-block: 0.5rem 1.75rem;
  }

  .article-hero h1 {
    font-size: 1.5rem;
  }

  #post-nav {
    grid-template-columns: 1fr;
  }
}