:root {
  --blog-filter-bg: var(--color-panel);
  --blog-filter-active-bg: var(--color-ink);
  --blog-filter-active-text: var(--color-page);
  --blog-card-bg: var(--color-page);
  --blog-meta-size: 0.8125rem;
  --blog-index-title-size: clamp(2rem, 1.4rem + 2vw, 3rem);
  --blog-article-title-size: clamp(1.5rem, 1.1rem + 1.4vw, 2rem);
  --blog-lead-size: clamp(0.9375rem, 0.85rem + 0.45vw, 1.125rem);
  --blog-body-size: 1rem;
  --blog-h2-size: clamp(1.25rem, 1.05rem + 0.7vw, 1.5rem);
  --blog-h3-size: clamp(1.0625rem, 0.96rem + 0.4vw, 1.25rem);
  --blog-content-width: 51.25rem;
  --blog-copy-width: 45rem;
  --blog-card-min-width: 18.75rem;
  --blog-transition: 160ms ease;
  --blog-link-opacity: 0.62;
  --blog-separator-opacity: 0.35;
  --blog-current-opacity: 0.78;
}

.blog-index-hero {
  padding-block: 1.5rem 3rem;
}

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

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

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

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

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

.blog-index-heading {
  max-width: var(--blog-content-width);
}

.blog-index-heading h1 {
  max-width: 100%;
  margin-block: 0.75rem 1rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--blog-index-title-size);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.035em;
}

.blog-index-heading p {
  max-width: 42rem;
  margin: 0;
  color: var(--color-ink-muted);
  font-size: var(--blog-lead-size);
  line-height: 1.7;
}

.blog-list-section {
  padding-block: 1rem 6rem;
}

.blog-list-toolbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
  padding: 2rem;
  border-radius: var(--radius-panel);
  background: var(--color-panel);
}

.blog-list-toolbar h2 {
  max-width: 32rem;
  margin-block: 0.625rem 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--blog-h2-size);
  line-height: 1.3;
}

.blog-filter-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.625rem;
}

.blog-filter {
  min-height: 2.625rem;
  padding-inline: 1rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-control);
  background: var(--color-page);
  color: var(--color-ink-muted);
  font: 700 0.875rem/1 var(--font-body);
  cursor: pointer;
  transition: border-color var(--blog-transition), background-color var(--blog-transition), color var(--blog-transition), transform var(--blog-transition);
}

.blog-filter:hover {
  border-color: var(--color-brand);
  color: var(--color-brand-dark);
  transform: translateY(-1px);
}

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

.blog-filter.is-active {
  border-color: var(--blog-filter-active-bg);
  background: var(--blog-filter-active-bg);
  color: var(--blog-filter-active-text);
}

.blog-list-status {
  min-height: 1.5rem;
  margin-block: 1.5rem 1rem;
  color: var(--color-ink-muted);
  font-size: var(--blog-meta-size);
}

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

.blog-card {
  display: flex;
  min-width: 0;
  min-height: 18rem;
  flex-direction: column;
  padding: 1.75rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--blog-card-bg);
  box-shadow: var(--shadow-card);
  color: var(--color-ink);
  text-decoration: none;
  transition: border-color var(--blog-transition), box-shadow var(--blog-transition), transform var(--blog-transition);
}

.blog-card:hover {
  border-color: var(--color-brand);
  transform: translateY(-3px);
}

.blog-card:focus-visible {
  outline: 3px solid var(--color-brand-soft);
  outline-offset: 3px;
}

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

.blog-card h3 {
  margin-block: 1.25rem 0.75rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 1rem + 0.5vw, 1.375rem);
  font-weight: 800;
  line-height: 1.4;
}

.blog-card p {
  display: -webkit-box;
  margin: 0;
  overflow: hidden;
  color: var(--color-ink-muted);
  font-size: 0.9375rem;
  line-height: 1.75;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.blog-card-more {
  margin-top: auto;
  padding-top: 1.5rem;
  color: var(--color-brand-dark);
  font-size: 0.875rem;
  font-weight: 800;
}

.article-page .blog-breadcrumb,
.article-page nav.breadcrumb,
.article-page nav.breadcrumbs,
.article-breadcrumb-wrap {
  padding-top: 0;
}

.article-breadcrumb-wrap {
  width: min(calc(100% - (var(--gutter) * 2)), var(--blog-content-width));
  margin-inline: auto;
}

.article-breadcrumb-wrap .blog-breadcrumb,
.article-breadcrumb-wrap nav.breadcrumb,
.article-breadcrumb-wrap nav.breadcrumbs {
  margin-top: 1.5rem;
}

.article-hero {
  width: min(calc(100% - (var(--gutter) * 2)), var(--blog-content-width));
  margin-inline: auto;
  padding-block: 0 2rem;
}

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

.article-hero h1 {
  max-width: 100%;
  margin: 0 0 0.75rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--blog-article-title-size);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -0.025em;
}

.article-lead,
.article-hero > .lead,
.article-hero > .article-summary {
  max-width: var(--blog-copy-width);
  margin: 0;
  color: var(--color-ink-muted);
  font-size: var(--blog-lead-size);
  line-height: 1.7;
}

.reading-wrap,
.article-body {
  width: min(calc(100% - (var(--gutter) * 2)), var(--blog-content-width));
  margin-inline: auto;
}

.prose {
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--blog-body-size);
  line-height: 1.85;
}

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

.prose section,
.article-body section {
  padding-block: 0;
  margin-block: 0 2.5rem;
}

.prose section + section,
.article-body section + section {
  margin-top: 0;
}

.prose h2 {
  max-width: 100%;
  margin-block: 2.5rem 1rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--blog-h2-size);
  font-weight: 800;
  line-height: 1.4;
}

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

.prose h3 {
  margin-block: 1.75rem 0.75rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--blog-h3-size);
  font-weight: 800;
  line-height: 1.45;
}

.prose p,
.prose ul,
.prose ol,
.prose blockquote,
.prose pre {
  margin-block: 0 1.25rem;
}

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

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

.prose a:not([class*="btn"]):not([class*="button"]) {
  color: var(--color-brand-dark);
  font-weight: 700;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

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

.prose blockquote {
  padding: 1rem 1.25rem;
  border-left: 4px solid var(--color-brand);
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
  background: var(--color-panel);
  color: var(--color-ink-muted);
}

.prose code {
  border-radius: calc(var(--radius-card) / 2);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.prose :not(pre) > code {
  padding: 0.15em 0.4em;
  background: var(--color-panel-strong);
  color: var(--color-brand-dark);
}

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

.prose pre code {
  color: inherit;
}

.end-download-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin-block: 2.5rem;
  padding: 2rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-panel);
  background: var(--color-panel);
}

.end-download-card-copy {
  min-width: 0;
}

.end-download-card h2 {
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--blog-h2-size);
  line-height: 1.35;
}

.end-download-card p {
  margin-block: 0.75rem 0;
}

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

#related-posts {
  width: min(calc(100% - (var(--gutter) * 2)), var(--blog-content-width));
  margin: 3rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid var(--color-line);
}

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

.related-post-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(var(--blog-card-min-width), 1fr));
  gap: 1rem;
}

.related-post-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 1.5rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-page);
  box-shadow: var(--shadow-card);
  color: var(--color-ink);
  text-decoration: none;
  transition: border-color var(--blog-transition), transform var(--blog-transition);
}

.related-post-card:hover {
  border-color: var(--color-brand);
  transform: translateY(-2px);
}

.related-post-card h3 {
  margin-block: 1rem 0.625rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 1.0625rem;
  line-height: 1.45;
}

.related-post-card p {
  display: -webkit-box;
  margin: 0;
  overflow: hidden;
  color: var(--color-ink-muted);
  font-size: 0.875rem;
  line-height: 1.7;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.related-post-more {
  margin-top: auto;
  padding-top: 1rem;
  color: var(--color-brand-dark);
  font-size: 0.8125rem;
  font-weight: 800;
}

#post-nav {
  display: grid;
  width: min(calc(100% - (var(--gutter) * 2)), var(--blog-content-width));
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.5rem auto 5rem;
}

.post-nav-card {
  display: flex;
  min-width: 0;
  min-height: 8rem;
  flex-direction: column;
  justify-content: center;
  padding: 1.25rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-panel);
  color: var(--color-ink);
  text-decoration: none;
  transition: border-color var(--blog-transition), transform var(--blog-transition);
}

.post-nav-card:hover {
  border-color: var(--color-brand);
  transform: translateY(-2px);
}

.post-nav-next {
  grid-column: 2;
  text-align: right;
}

.post-nav-label {
  margin-bottom: 0.5rem;
  color: var(--color-ink-muted);
  font-size: var(--blog-meta-size);
}

.post-nav-card strong {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 0.9375rem;
  line-height: 1.5;
}

@media (max-width: 48rem) {
  .blog-index-hero {
    padding-block: 1rem 2.25rem;
  }

  .blog-index-heading h1 {
    font-size: clamp(1.75rem, 1.45rem + 1.3vw, 1.875rem);
  }

  .blog-list-section {
    padding-bottom: 4rem;
  }

  .blog-list-toolbar {
    align-items: stretch;
    flex-direction: column;
    padding: 1.5rem;
  }

  .blog-filter-list {
    justify-content: flex-start;
  }

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

  .blog-card {
    min-height: auto;
  }

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

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

@media (max-width: 40.625rem) {
  .article-hero h1 {
    font-size: 1.5rem;
  }

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

  .post-nav-next {
    grid-column: 1;
    text-align: left;
  }
}

@media (max-width: 30rem) {
  .blog-index-hero {
    padding-top: 0.75rem;
  }

  .blog-breadcrumb,
  nav.breadcrumb,
  nav.breadcrumbs {
    margin-top: 1.25rem;
  }

  .blog-list-toolbar,
  .blog-card,
  .related-post-card,
  .end-download-card {
    padding: 1.25rem;
  }

  .blog-filter {
    min-height: 2.5rem;
    padding-inline: 0.875rem;
  }
}