.blog-hero {
  position: relative;
  overflow: hidden;
  border-bottom: var(--line-hairline) solid var(--color-border);
  background:
    repeating-radial-gradient(
      circle at 88% 35%,
      var(--color-transparent) 0,
      var(--color-transparent) 1.4rem,
      var(--color-accent-faint) 1.45rem,
      var(--color-transparent) 1.5rem
    ),
    linear-gradient(135deg, var(--color-bg-deep), var(--color-bg-panel));
}

.blog-hero::after {
  position: absolute;
  inset-block: 0;
  right: var(--gutter);
  width: min(28vw, 22rem);
  border-inline: var(--line-hairline) solid var(--color-accent-faint);
  content: "";
  pointer-events: none;
}

.blog-hero .content-wrap {
  position: relative;
  z-index: 1;
}

.blog-hero h1 {
  max-width: 12ch;
  margin-block: 0.35em 0.24em;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 7vw, 6.75rem);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.045em;
}

.blog-hero p {
  max-width: 44rem;
  margin: 0;
  color: var(--color-text-muted);
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  line-height: 1.9;
}

.blog-index-section {
  background-color: var(--color-bg);
}

.blog-index-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: clamp(1.25rem, 4vw, 3rem);
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
  padding-bottom: 1.25rem;
  border-bottom: var(--line-hairline) solid var(--color-border);
}

.blog-index-head h2 {
  margin-block: 0.35rem 0;
  font-family: var(--font-display);
}

.blog-filter {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem;
}

.blog-filter-button {
  min-height: 2.5rem;
  padding: 0.55rem 0.9rem;
  border: var(--line-hairline) solid var(--color-border);
  border-radius: var(--radius-square);
  color: var(--color-text-muted);
  background-color: var(--color-bg-panel);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition:
    color var(--motion-fast),
    border-color var(--motion-fast),
    background-color var(--motion-fast);
}

.blog-filter-button:hover,
.blog-filter-button:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-text);
}

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

.post-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1rem, 2vw, 1.5rem);
}

.post-card,
.related-post-card {
  position: relative;
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: var(--line-hairline) solid var(--color-border);
  border-radius: var(--radius-square);
  background-color: var(--color-bg-panel);
  box-shadow: var(--shadow-card);
}

.post-card::after,
.related-post-card::after {
  position: absolute;
  inset: 0.4rem;
  border: var(--line-hairline) solid var(--color-accent-faint);
  content: "";
  pointer-events: none;
}

.post-card h3,
.related-post-card h3 {
  position: relative;
  z-index: 1;
  margin-block: 1rem 0.75rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.1vw, 1.65rem);
  line-height: 1.45;
}

.post-card p,
.related-post-card p {
  position: relative;
  z-index: 1;
  margin-block: 0 1.25rem;
  color: var(--color-text-muted);
  line-height: 1.85;
}

.post-meta {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 1.65rem;
  padding-inline: 0.55rem;
  border: var(--line-hairline) solid var(--color-accent-dark);
  border-radius: var(--radius-chip);
  color: var(--color-accent);
  background-color: var(--color-accent-faint);
}

.post-card-link {
  position: relative;
  z-index: 1;
  align-self: flex-start;
  margin-top: auto;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-decoration: none;
}

.post-card-link:hover,
.post-card-link:focus-visible {
  color: var(--color-highlight);
  text-decoration: underline;
  text-underline-offset: 0.3em;
}

.blog-empty-state {
  padding: 2rem;
  border: var(--line-hairline) solid var(--color-border);
  color: var(--color-text-muted);
  background-color: var(--color-bg-panel);
  text-align: center;
}

.breadcrumb-wrap {
  margin-top: max(1.25rem, calc(var(--gutter) * 0.5));
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.76rem;
}

.breadcrumb a {
  color: var(--color-accent);
  text-decoration: none;
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--color-highlight);
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

.breadcrumb-separator {
  color: var(--color-border);
}

.article-hero {
  padding-top: clamp(2rem, 5vw, 4.5rem);
  padding-bottom: clamp(2.25rem, 6vw, 5rem);
  border-bottom: var(--line-hairline) solid var(--color-border);
}

.article-hero .post-meta {
  margin-bottom: 1.25rem;
}

.article-hero h1 {
  max-width: 18ch;
  margin-block: 0 1.25rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(2.35rem, 5.6vw, 5.25rem);
  line-height: 1.12;
  letter-spacing: -0.035em;
}

.article-summary {
  max-width: 48rem;
  margin: 0;
  color: var(--color-text-muted);
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  line-height: 1.9;
}

.article-body {
  padding-top: clamp(2.5rem, 6vw, 5.5rem);
  padding-bottom: clamp(3rem, 7vw, 6rem);
}

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

.article-body h2 {
  margin-block: clamp(2.8rem, 6vw, 4.5rem) 1.25rem;
  padding-top: 1rem;
  border-top: var(--line-hairline) solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  line-height: 1.3;
}

.article-body h2::before {
  margin-right: 0.55rem;
  color: var(--color-accent);
  content: "§";
  font-family: var(--font-mono);
}

.article-body h3 {
  margin-block: 2.2rem 0.85rem;
  color: var(--color-accent);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  line-height: 1.45;
}

.article-body p,
.article-body li {
  color: var(--color-text-muted);
  font-size: 1.02rem;
  line-height: 2;
}

.article-body p {
  margin-block: 1rem;
}

.article-body ul,
.article-body ol {
  margin-block: 1.25rem;
  padding-left: 1.5rem;
}

.article-body li + li {
  margin-top: 0.65rem;
}

.article-body strong {
  color: var(--color-text);
}

.article-body a {
  color: var(--color-accent);
  text-decoration-thickness: var(--line-hairline);
  text-underline-offset: 0.25em;
}

.article-body code {
  color: var(--color-highlight);
  font-family: var(--font-mono);
}

.article-body :not(pre) > code {
  padding: 0.12em 0.35em;
  border: var(--line-hairline) solid var(--color-border);
  border-radius: var(--radius-square);
  background-color: var(--color-bg-panel-2);
}

.article-body pre {
  overflow-x: auto;
  margin-block: 1.5rem;
  padding: clamp(1rem, 3vw, 1.5rem);
  border: var(--line-hairline) solid var(--color-border);
  border-left: var(--line-strong) solid var(--color-accent);
  border-radius: var(--radius-square);
  color: var(--color-text);
  background-color: var(--color-bg-deep);
  box-shadow: var(--shadow-panel);
}

.article-body pre code {
  color: inherit;
  font-size: 0.88rem;
  line-height: 1.8;
}

.article-body blockquote {
  margin-block: 1.5rem;
  margin-inline: 0;
  padding: 1rem 1.25rem;
  border-left: var(--line-strong) solid var(--color-accent);
  color: var(--color-text-muted);
  background-color: var(--color-accent-faint);
}

.article-body blockquote p {
  margin-block: 0;
}

.article-download-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(1.5rem, 5vw, 4rem);
  margin-top: clamp(3rem, 7vw, 5rem);
  padding: clamp(1.5rem, 4vw, 2.75rem);
  border: var(--line-strong) double var(--color-accent);
  border-radius: var(--radius-square);
  background-color: var(--color-bg-panel-2);
  box-shadow: var(--shadow-panel);
}

.article-download-card h2 {
  margin-block: 0.45rem 0.65rem;
  padding: 0;
  border: 0;
  font-size: clamp(1.6rem, 3vw, 2.25rem);
}

.article-download-card h2::before {
  content: none;
}

.article-download-card p {
  margin: 0;
}

.article-download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

#related-posts {
  padding-top: clamp(2.5rem, 6vw, 5rem);
  border-top: var(--line-hairline) solid var(--color-border);
}

#related-posts > h2 {
  margin-block: 0 1.5rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 3vw, 2.4rem);
}

.related-post-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.related-post-card {
  padding: 1.35rem;
}

.related-post-card h3 {
  font-size: 1.15rem;
}

.related-post-card p {
  font-size: 0.92rem;
}

#post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  padding-top: clamp(2rem, 5vw, 3.5rem);
  padding-bottom: clamp(3rem, 7vw, 5rem);
}

.post-nav-card {
  display: flex;
  min-height: 8rem;
  flex-direction: column;
  justify-content: center;
  gap: 0.65rem;
  padding: 1.35rem;
  border: var(--line-hairline) solid var(--color-border);
  border-radius: var(--radius-square);
  color: var(--color-text);
  background-color: var(--color-bg-panel);
  text-decoration: none;
  box-shadow: var(--shadow-card);
  transition:
    border-color var(--motion-fast),
    background-color var(--motion-fast),
    transform var(--motion-fast);
}

.post-nav-card:hover,
.post-nav-card:focus-visible {
  border-color: var(--color-accent);
  background-color: var(--color-bg-panel-2);
  transform: translateY(-0.15rem);
}

.post-nav-card:last-child {
  text-align: right;
}

.post-nav-card strong {
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.55;
}

.dl-fab {
  position: fixed;
  z-index: 20;
  right: var(--gutter);
  bottom: var(--gutter);
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  min-height: 3rem;
  padding-inline: 1rem;
  border: var(--line-hairline) solid var(--color-error-dark);
  border-radius: var(--radius-square);
  color: var(--color-text);
  background-color: var(--color-error);
  box-shadow: var(--shadow-button);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-decoration: none;
}

.dl-fab:hover,
.dl-fab:focus-visible {
  color: var(--color-text);
  background-color: var(--color-error-dark);
}

.dl-fab-icon {
  font-size: 1.2rem;
  line-height: 1;
}

@media (max-width: 56rem) {
  .blog-index-head {
    align-items: flex-start;
    flex-direction: column;
  }

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

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

  .article-download-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 38rem) {
  .blog-hero::after {
    display: none;
  }

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

  .post-nav-card:last-child {
    text-align: left;
  }

  .article-download-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .article-download-actions .button {
    justify-content: center;
  }

  .dl-fab {
    right: 1rem;
    bottom: 1rem;
  }
}