.blog-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg-panel);
}

.blog-hero::before {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  opacity: 0.32;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 4rem 2rem;
}

.blog-hero .wrap {
  position: relative;
  z-index: 1;
  min-height: 20rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.blog-hero h1 {
  max-width: 15ch;
  margin-top: 1rem;
  margin-bottom: 1.25rem;
  color: var(--color-accent-soft);
  font-family: var(--font-display);
  font-size: clamp(2.7rem, 7vw, 5.5rem);
  line-height: 1.08;
  letter-spacing: -0.045em;
  text-shadow: 0 0 1.5rem var(--color-accent-dark);
}

.blog-hero p {
  max-width: 46rem;
  margin: 0;
  color: var(--color-text-muted);
  font-size: 1.08rem;
  line-height: 1.8;
}

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

.blog-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 2rem;
  margin-bottom: 2rem;
  padding: 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  background-color: var(--color-bg-deep);
}

.blog-filter-button {
  min-height: 2.7rem;
  padding: 0.55rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  color: var(--color-text-muted);
  background-color: var(--color-bg-panel);
  font-family: var(--font-mono);
  font-size: 0.86rem;
  cursor: pointer;
}

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

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

.post-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
}

.post-card,
.related-card {
  position: relative;
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  background-color: var(--color-bg-panel);
  box-shadow: var(--shadow-panel);
}

.post-card::before,
.related-card::before {
  position: absolute;
  top: -1px;
  left: -1px;
  width: 4.5rem;
  height: 2px;
  content: "";
  background-color: var(--color-success);
}

.post-card h3,
.related-card h3 {
  margin-top: 1.1rem;
  margin-bottom: 0.8rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 1.3rem;
  line-height: 1.45;
}

.post-card p,
.related-card p {
  margin-top: 0;
  margin-bottom: 1.4rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.post-meta span {
  max-width: 100%;
  overflow: hidden;
  padding: 0.25rem 0.55rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  color: var(--color-success);
  background-color: var(--color-bg-deep);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.post-link {
  width: fit-content;
  margin-top: auto;
  color: var(--color-accent-soft);
  font-family: var(--font-mono);
  font-weight: 700;
  text-decoration: none;
}

.post-link::after {
  content: " →";
}

.post-link:hover,
.post-link:focus-visible {
  color: var(--color-warn);
}

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

.breadcrumbs {
  width: min(var(--content-width), calc(100% - (var(--gutter) * 2)));
  margin-right: auto;
  margin-left: auto;
  padding-top: 1.5rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li:not(:last-child)::after {
  margin-left: 0.55rem;
  color: var(--color-border-light);
  content: "/";
}

.breadcrumbs a {
  color: var(--color-success);
  text-decoration: none;
}

.breadcrumbs a:hover,
.breadcrumbs a:focus-visible {
  color: var(--color-text);
}

.article-hero {
  padding-top: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg-panel);
}

.article-hero-inner {
  width: min(var(--reading-width), calc(100% - (var(--gutter) * 2)));
  margin-right: auto;
  margin-left: auto;
}

.article-hero h1 {
  margin-top: 1.2rem;
  margin-bottom: 1.2rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 6vw, 4.4rem);
  line-height: 1.15;
  letter-spacing: -0.035em;
}

.article-summary {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 1.12rem;
  line-height: 1.85;
}

.prose {
  color: var(--color-text);
  font-size: 1.02rem;
  line-height: 1.9;
}

.prose h2 {
  margin-top: 3.4rem;
  margin-bottom: 1.1rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 4vw, 2.2rem);
  line-height: 1.3;
}

.prose h2::before {
  margin-right: 0.55rem;
  color: var(--color-accent);
  content: "＋";
}

.prose h3 {
  margin-top: 2.3rem;
  margin-bottom: 0.8rem;
  color: var(--color-success);
  font-family: var(--font-display);
  font-size: 1.3rem;
}

.prose p,
.prose ul,
.prose ol,
.prose blockquote,
.prose pre {
  margin-top: 1rem;
  margin-bottom: 1rem;
}

.prose a {
  color: var(--color-accent-soft);
  text-underline-offset: 0.2em;
}

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

.prose li + li {
  margin-top: 0.45rem;
}

.prose blockquote {
  margin-right: 0;
  margin-left: 0;
  padding: 1rem 1.2rem;
  border-left: 3px solid var(--color-warn);
  color: var(--color-text-muted);
  background-color: var(--color-bg-panel);
}

.prose pre {
  max-width: 100%;
  overflow-x: auto;
  padding: 1.2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  color: var(--color-text);
  background-color: var(--color-bg-deep);
  font-family: var(--font-mono);
  line-height: 1.65;
}

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

.prose :not(pre) > code {
  padding: 0.12rem 0.35rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  color: var(--color-success);
  background-color: var(--color-bg-deep);
}

.download-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 2rem;
  margin-top: 4rem;
  padding: clamp(1.4rem, 4vw, 2.4rem);
  border: 1px solid var(--color-warn);
  border-radius: var(--radius-small);
  background-color: var(--color-bg-panel-2);
  box-shadow: var(--shadow-panel);
}

.download-cta h2 {
  margin: 0 0 0.6rem;
  padding: 0;
  border: 0;
  font-size: 1.6rem;
}

.download-cta h2::before {
  content: none;
}

.download-cta p {
  margin: 0;
  color: var(--color-text-muted);
}

.article-related {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.article-related > h2 {
  margin-top: 0;
}

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

.related-card {
  padding: 1.25rem;
}

.related-card h3 {
  font-size: 1.08rem;
}

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

.post-navigation {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
  margin-bottom: 2rem;
}

.post-nav-card {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  color: var(--color-text);
  background-color: var(--color-bg-panel);
  text-decoration: none;
}

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

.post-nav-label {
  color: var(--color-success);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.post-nav-card strong {
  overflow-wrap: anywhere;
  line-height: 1.5;
}

@media (max-width: 52rem) {
  .post-grid,
  .related-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 38rem) {
  .blog-hero .wrap {
    min-height: 16rem;
  }

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

  .blog-filter-button {
    width: 100%;
  }

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