:root {
  --blog-reading-width: 56rem;
  --blog-rule-width: 0.25rem;
  --blog-control-height: 2.75rem;
  --blog-card-lift: -0.2rem;
  --blog-transition: 180ms ease;
}

.blog-index-page,
.article-page {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
}

.blog-list-hero {
  padding: clamp(3.5rem, 8vw, 7rem) var(--gutter) clamp(2.5rem, 5vw, 4.5rem);
  background:
    linear-gradient(var(--color-hero-top), var(--color-hero-bottom));
}

.blog-list-hero-inner,
.blog-catalog,
.blog-list-promo,
.breadcrumbs,
.article-hero,
.reading-wrap,
.article-end {
  width: min(100%, calc(var(--blog-reading-width) + (var(--gutter) * 2)));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.blog-list-hero-inner {
  position: relative;
  border-top: var(--blog-rule-width) solid var(--color-accent);
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
}

.blog-list-hero-inner::after {
  position: absolute;
  right: var(--gutter);
  top: 0;
  width: clamp(4rem, 12vw, 8rem);
  height: var(--blog-rule-width);
  background-color: var(--color-success);
  content: "";
}

.blog-kicker,
.section-index,
.promo-eyebrow {
  margin: 0 0 1rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.blog-list-hero h1 {
  max-width: 18ch;
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(2.35rem, 7vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  text-wrap: pretty;
}

.blog-list-hero h1 + p {
  max-width: 42rem;
  margin: 1.25rem 0 0;
  color: var(--color-muted);
  font-size: clamp(1rem, 2vw, 1.12rem);
  line-height: 1.85;
}

.blog-catalog {
  padding-top: clamp(3rem, 6vw, 5rem);
  padding-bottom: clamp(4rem, 8vw, 7rem);
}

.blog-catalog-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.blog-catalog-head h2 {
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 4vw, 2.2rem);
  letter-spacing: -0.02em;
  text-wrap: pretty;
}

.blog-catalog-head > p {
  max-width: 20rem;
  margin: 0;
  color: var(--color-muted);
  line-height: 1.7;
}

.blog-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  padding-block: 1.5rem 2rem;
}

.blog-filter-button {
  min-height: var(--blog-control-height);
  padding: 0.65rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background-color: var(--color-panel);
  color: var(--color-muted);
  font: 700 0.88rem/1 var(--font-body);
  cursor: pointer;
  transition:
    color var(--blog-transition),
    border-color var(--blog-transition),
    background-color var(--blog-transition),
    transform var(--blog-transition);
}

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

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

.blog-filter-button:focus-visible,
.article-read-link:focus-visible,
.related-card a:focus-visible,
.post-nav-card:focus-visible,
.float-cta:focus-visible {
  outline: 2px solid var(--color-success);
  outline-offset: 0.2rem;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-border);
  box-shadow: var(--shadow-card);
}

.article-card {
  position: relative;
  min-width: 0;
  padding: clamp(1.5rem, 4vw, 2.25rem);
  background-color: var(--color-panel);
  transition:
    background-color var(--blog-transition),
    transform var(--blog-transition);
}

.article-card::before,
.related-card::before,
.post-nav-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 0.2rem;
  background-color: var(--color-success);
  content: "";
  opacity: 0;
  transition: opacity var(--blog-transition);
}

.article-card:hover {
  z-index: 1;
  background-color: color-mix(in srgb, var(--color-panel) 90%, var(--color-panel-deep));
  transform: translateY(var(--blog-card-lift));
}

.article-card:hover::before,
.related-card:hover::before,
.post-nav-card:hover::before {
  opacity: 1;
}

.article-card-meta,
.related-card-meta,
.article-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.article-tag,
.article-meta .tag,
.related-card-meta span:first-child {
  border-radius: var(--radius-pill);
  background-color: var(--color-accent);
  color: var(--color-panel);
  padding: 0.42rem 0.7rem;
  font-family: var(--font-body);
  font-weight: 700;
}

.article-card time,
.related-card time,
.article-meta time,
.article-readtime {
  padding: 0.38rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
}

.article-card h3 {
  margin: 1.25rem 0 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.18rem, 2.3vw, 1.45rem);
  line-height: 1.45;
  letter-spacing: -0.015em;
  text-wrap: pretty;
}

.article-card p {
  margin: 0.9rem 0 1.4rem;
  color: var(--color-muted);
  font-size: 0.96rem;
  line-height: 1.8;
}

.article-read-link,
.related-card > a {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--color-text);
  font-weight: 700;
  text-decoration: none;
}

.article-read-arrow {
  font-family: var(--font-mono);
  transition: transform var(--blog-transition);
}

.article-read-link:hover .article-read-arrow {
  transform: translateX(0.25rem);
}

.blog-empty {
  margin: 0;
  padding: 3rem 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-panel);
  color: var(--color-muted);
  text-align: center;
}

.blog-list-promo,
.promo-block {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 2rem;
  margin-bottom: clamp(4rem, 8vw, 7rem);
  padding-block: clamp(2rem, 5vw, 3rem);
  overflow: hidden;
  border: 1px solid var(--color-accent-dark);
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-companion));
  color: var(--color-panel);
  box-shadow: var(--shadow-panel);
}

.blog-list-promo::after,
.promo-block::after {
  position: absolute;
  right: -2rem;
  bottom: -3rem;
  width: 10rem;
  height: 10rem;
  border: 1px solid color-mix(in srgb, var(--color-panel) 28%, transparent);
  border-radius: var(--radius-lg);
  content: "";
  transform: rotate(18deg);
  pointer-events: none;
}

.blog-list-promo h2,
.promo-block h2 {
  margin: 0;
  color: var(--color-panel);
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 4vw, 2.2rem);
  letter-spacing: -0.02em;
  text-wrap: pretty;
}

.blog-list-promo p:not(.promo-eyebrow),
.promo-block p {
  max-width: 38rem;
  margin: 0.8rem 0 0;
  color: color-mix(in srgb, var(--color-panel) 82%, var(--color-border));
  line-height: 1.8;
}

.blog-list-promo .promo-eyebrow,
.promo-block .promo-eyebrow {
  color: color-mix(in srgb, var(--color-panel) 76%, var(--color-border));
}

.promo-actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.blog-list-promo .btn-primary,
.promo-block .btn-primary {
  border-color: var(--color-panel);
  background: var(--color-panel);
  color: var(--color-accent-dark);
  box-shadow: none;
}

.blog-list-promo .btn-secondary,
.promo-block .btn-secondary {
  border-color: color-mix(in srgb, var(--color-panel) 58%, transparent);
  background-color: transparent;
  color: var(--color-panel);
}

.breadcrumbs {
  margin-top: clamp(1.2rem, 3vw, 2rem);
  padding-top: 1rem;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--color-muted);
  font-size: 0.88rem;
}

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

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

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

.article-hero {
  position: relative;
  margin-top: clamp(2rem, 5vw, 3.5rem);
  padding-top: clamp(1.5rem, 4vw, 2.25rem);
  padding-bottom: clamp(2rem, 5vw, 3rem);
  border-top: var(--blog-rule-width) solid var(--color-accent);
  border-bottom: 1px solid var(--color-border);
}

.article-hero::before {
  position: absolute;
  top: calc(var(--blog-rule-width) * -1);
  right: var(--gutter);
  width: clamp(4rem, 15vw, 9rem);
  height: var(--blog-rule-width);
  background-color: var(--color-success);
  content: "";
}

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

.article-hero h1 {
  max-width: 22ch;
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.5vw, 2.6rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  text-wrap: pretty;
}

.article-hero .article-summary {
  max-width: 48rem;
  margin: 1.25rem 0 0;
  color: var(--color-muted);
  font-size: clamp(1rem, 2vw, 1.12rem);
  line-height: 1.85;
}

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

.article-body {
  counter-reset: article-section;
  padding-top: clamp(2rem, 5vw, 3.25rem);
  padding-bottom: clamp(2.5rem, 6vw, 4rem);
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1.85;
}

.article-body h2 {
  counter-increment: article-section;
  position: relative;
  margin: 2.8rem 0 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.6rem);
  line-height: 1.4;
  letter-spacing: -0.015em;
  text-wrap: pretty;
}

.article-body h2::before {
  display: inline-block;
  min-width: 3.6rem;
  margin-right: 0.7rem;
  color: var(--color-success);
  content: "FIG " counter(article-section, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0;
  vertical-align: 0.2em;
}

.article-body h3 {
  margin: 2rem 0 0.75rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.12rem, 2.4vw, 1.3rem);
  line-height: 1.45;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

.article-body p,
.article-body ul,
.article-body ol,
.article-body blockquote {
  margin-top: 0;
  margin-bottom: 1.35rem;
}

.article-body ul,
.article-body ol {
  padding-left: 1.4rem;
}

.article-body li + li {
  margin-top: 0.55rem;
}

.article-body a {
  color: var(--color-accent);
  text-decoration-color: var(--color-success);
  text-underline-offset: 0.2em;
}

.article-body blockquote,
.callout,
.verdict {
  position: relative;
  margin: 1.75rem 0;
  padding: 1.2rem 1.3rem 1.2rem 3.3rem;
  border-left: 0.25rem solid var(--color-accent);
  border-radius: var(--radius-xs);
  background-color: color-mix(in srgb, var(--color-panel) 82%, var(--color-panel-deep));
  color: var(--color-text);
}

.article-body blockquote::before,
.callout::before,
.verdict::before {
  position: absolute;
  top: 1.1rem;
  left: 1rem;
  display: grid;
  width: 1.45rem;
  height: 1.45rem;
  place-items: center;
  border-radius: var(--radius-pill);
  background-color: var(--color-accent);
  color: var(--color-panel);
  content: "i";
  font: 700 0.75rem/1 var(--font-mono);
}

.callout.warning {
  border-left-color: var(--color-warn);
  background-color: color-mix(in srgb, var(--color-warn) 12%, var(--color-panel));
}

.callout.warning::before {
  background-color: var(--color-warn);
  content: "!";
}

.callout.success {
  border-left-color: var(--color-success);
  background-color: color-mix(in srgb, var(--color-success) 12%, var(--color-panel));
}

.callout.success::before {
  background-color: var(--color-success);
  content: "✓";
}

.verdict {
  border-left-color: var(--color-success);
  background-color: color-mix(in srgb, var(--color-success) 10%, var(--color-panel));
}

.verdict::before {
  background-color: var(--color-success);
  content: "＝";
}

.check-list {
  display: grid;
  gap: 0.65rem;
  margin: 1.5rem 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  margin: 0;
  padding: 0.9rem 1rem;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-xs);
  background-color: var(--color-panel);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: 0.8rem;
  margin: 1.75rem 0;
}

.stat-card {
  position: relative;
  overflow: hidden;
  padding: 1.2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-panel);
}

.stat-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 0.22rem;
  background-color: var(--color-accent);
  content: "";
}

.stat-card:nth-child(even) {
  background-color: color-mix(in srgb, var(--color-success) 8%, var(--color-panel));
}

.stat-card:nth-child(even)::before {
  background-color: var(--color-success);
}

.stat-card:nth-child(3n)::before {
  background-color: var(--color-warn);
}

.stat-num {
  display: block;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 4vw, 1.85rem);
  font-weight: 700;
  line-height: 1.2;
}

.stat-label {
  display: block;
  margin-top: 0.55rem;
  color: var(--color-muted);
  font-size: 0.86rem;
  line-height: 1.5;
}

.article-body pre {
  position: relative;
  max-width: 100%;
  margin: 1.75rem 0;
  padding: 3rem 1.25rem 1.35rem;
  overflow-x: auto;
  border: 1px solid var(--color-accent-dark);
  border-radius: var(--radius-sm);
  background-color: var(--color-accent-dark);
  color: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.article-body pre::before {
  position: absolute;
  top: 1rem;
  left: 1.15rem;
  color: var(--color-error);
  content: "●";
  text-shadow:
    1.15rem 0 var(--color-warn),
    2.3rem 0 var(--color-success);
  font-size: 0.65rem;
  line-height: 1;
}

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.article-body :not(pre) > code {
  padding: 0.15rem 0.35rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background-color: var(--color-panel-deep);
  color: var(--color-accent-dark);
}

.article-body table {
  width: 100%;
  margin: 1.75rem 0;
  border-collapse: collapse;
  background-color: var(--color-panel);
  font-size: 0.92rem;
}

.article-body th,
.article-body td {
  min-width: 8rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.article-body th {
  background-color: var(--color-accent);
  color: var(--color-panel);
  font-weight: 700;
}

.article-body tbody tr:nth-child(even) {
  background-color: var(--color-panel-deep);
}

.article-body tbody tr {
  transition: background-color var(--blog-transition);
}

.article-body tbody tr:hover {
  background-color: color-mix(in srgb, var(--color-success) 10%, var(--color-panel));
}

.article-end {
  padding-bottom: clamp(3rem, 7vw, 5rem);
}

.article-end .promo-block {
  width: 100%;
  margin-bottom: 0;
  padding-inline: clamp(1.5rem, 5vw, 2.5rem);
}

#related-posts {
  padding-top: clamp(2.5rem, 5vw, 4rem);
}

#related-posts > h2 {
  margin: 0 0 1.25rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.6rem);
  letter-spacing: -0.015em;
  text-wrap: pretty;
}

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

.related-card {
  position: relative;
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-panel);
  transition:
    border-color var(--blog-transition),
    transform var(--blog-transition),
    box-shadow var(--blog-transition);
}

.related-card:hover {
  border-color: var(--color-success);
  box-shadow: var(--shadow-card);
  transform: translateY(var(--blog-card-lift));
}

.related-card h3 {
  margin: 1rem 0 0.7rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.5;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

.related-card p {
  margin: 0 0 1rem;
  color: var(--color-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.post-navigation {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  padding-top: clamp(1.5rem, 3vw, 2rem);
  padding-bottom: clamp(1.5rem, 3vw, 2rem);
}

.post-nav-card {
  position: relative;
  display: block;
  min-width: 0;
  padding: 1.25rem;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-panel);
  color: var(--color-text);
  text-decoration: none;
  transition:
    border-color var(--blog-transition),
    transform var(--blog-transition),
    box-shadow var(--blog-transition);
}

.post-nav-card:hover {
  border-color: var(--color-success);
  box-shadow: var(--shadow-card);
  transform: translateY(var(--blog-card-lift));
}

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

.post-nav-label {
  display: block;
  margin-bottom: 0.55rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.post-nav-card strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1rem;
  line-height: 1.55;
  letter-spacing: -0.01em;
}

.float-cta {
  position: fixed;
  right: max(1rem, var(--gutter));
  bottom: max(1rem, var(--gutter));
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  min-height: var(--blog-control-height);
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-accent-dark);
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-companion));
  color: var(--color-panel);
  box-shadow: var(--shadow-button);
  font-weight: 700;
  text-decoration: none;
  transition:
    transform var(--blog-transition),
    box-shadow var(--blog-transition);
}

.float-cta:hover {
  transform: translateY(var(--blog-card-lift));
  box-shadow: var(--shadow-panel);
}

.float-cta svg {
  width: 1.2rem;
  height: 1.2rem;
  flex: 0 0 auto;
}

@media (max-width: 860px) {
  .article-body table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
    white-space: nowrap;
  }

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

@media (max-width: 720px) {
  .blog-catalog-head,
  .blog-list-promo,
  .promo-block {
    grid-template-columns: 1fr;
  }

  .blog-catalog-head {
    align-items: start;
  }

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

  .promo-actions {
    justify-content: flex-start;
  }

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

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

@media (max-width: 640px) {
  .blog-list-hero-inner,
  .blog-catalog,
  .blog-list-promo,
  .breadcrumbs,
  .article-hero,
  .reading-wrap,
  .article-end {
    width: 100%;
  }

  .blog-filter {
    flex-wrap: nowrap;
    margin-inline: calc(var(--gutter) * -1);
    padding-inline: var(--gutter);
    overflow-x: auto;
    scrollbar-width: thin;
  }

  .blog-filter-button {
    flex: 0 0 auto;
  }

  .article-hero h1 {
    font-size: clamp(1.85rem, 9vw, 2.35rem);
  }

  .article-body h2::before {
    display: block;
    margin: 0 0 0.45rem;
  }

  .float-cta {
    right: 0.75rem;
    bottom: 0.75rem;
    max-width: calc(100vw - 1.5rem);
    padding: 0.7rem 0.9rem;
    font-size: 0.88rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .blog-filter-button,
  .article-card,
  .article-read-arrow,
  .related-card,
  .post-nav-card,
  .float-cta,
  .article-body tbody tr {
    transition: none;
  }

  .blog-filter-button:hover,
  .article-card:hover,
  .related-card:hover,
  .post-nav-card:hover,
  .float-cta:hover {
    transform: none;
  }
}