:root {
  --blog-reading: 56rem;
  --blog-gutter: max(1.5rem, var(--gutter, 1.5rem));
  --blog-body-size: 1rem;
  --blog-small-size: 0.875rem;
  --blog-list-title: clamp(2rem, 4vw, 3rem);
  --blog-article-title: clamp(1.85rem, 3.8vw, 2.6rem);
  --blog-section-title: clamp(1.3rem, 2.4vw, 1.6rem);
  --blog-subtitle: 1.3rem;
  --blog-card-title: 1.2rem;
  --blog-stat-size: 1.8rem;
  --blog-line-height: 1.85;
  --blog-heading-height: 1.45;
  --blog-tracking: -0.01em;
  --blog-space-small: 0.75rem;
  --blog-space: 1.5rem;
  --blog-space-large: 2.5rem;
  --blog-focus: var(--accent-dark);
  --blog-dark: var(--text);
  --blog-on-dark: var(--white);
  --blog-surface-warm: color-mix(in srgb, var(--accent) 9%, var(--bg-panel));
  --blog-surface-success: color-mix(in srgb, var(--success) 9%, var(--bg-panel));
  --blog-surface-warning: color-mix(in srgb, var(--warn) 10%, var(--bg-panel));
  --blog-hover: color-mix(in srgb, var(--accent) 7%, var(--bg-panel));
  --blog-hero-block: color-mix(in srgb, var(--accent) 13%, var(--bg));
  --blog-promo-end: color-mix(in srgb, var(--accent-dark) 70%, var(--text));
  --blog-shadow: var(--shadow-card);
  --blog-radius: var(--r-md);
  --blog-motion: var(--speed-fast, 160ms);
}

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

.blog-index *,
.article-page * {
  box-sizing: border-box;
}

.blog-list-hero h1,
.article-hero h1,
.prose h1,
.prose h2,
.prose h3,
.article-body h2,
.article-body h3,
.article-card h2,
.article-card h3,
.promo-block h2,
#related-posts h2 {
  display: block;
  text-wrap: pretty;
  letter-spacing: var(--blog-tracking);
  overflow-wrap: break-word;
  font-family: var(--font-display);
  line-height: var(--blog-heading-height);
}

.blog-index :focus-visible,
.article-page :focus-visible,
#related-posts :focus-visible,
#post-nav :focus-visible {
  outline: 3px solid var(--blog-focus);
  outline-offset: 4px;
}

.breadcrumbs {
  margin-top: 1.5rem;
  padding-top: 0.25rem;
  padding-bottom: 1rem;
  color: var(--text-muted);
  font-size: var(--blog-small-size);
  line-height: 1.8;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li {
  min-width: 0;
  overflow-wrap: anywhere;
}

.breadcrumbs li + li::before {
  content: "›";
  margin-inline-end: 0.75rem;
  color: var(--text-muted);
}

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

.article-page .breadcrumbs,
.breadcrumbs.reading-wrap,
.article-breadcrumbs,
.article-hero,
.reading-wrap {
  box-sizing: border-box;
  width: 100%;
  max-width: calc(var(--blog-reading) + 2 * var(--blog-gutter));
  margin-inline: auto;
  padding-inline: var(--blog-gutter);
}

.article-hero,
.blog-list-hero {
  position: relative;
  isolation: isolate;
  padding-block: 2.5rem;
}

.article-hero::before,
.blog-list-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset-block: 1rem 1.25rem;
  inset-inline: calc(var(--blog-gutter) + 1.75rem) var(--blog-gutter);
  background: linear-gradient(115deg, var(--blog-hero-block), var(--bg-panel-2));
  border-radius: var(--blog-radius);
  box-shadow: inset 0 1px 0 var(--hi-line);
  pointer-events: none;
}

.article-hero::after,
.blog-list-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  inset-block-start: 1rem;
  inset-inline-end: calc(var(--blog-gutter) + 1.25rem);
  width: 3rem;
  height: 0.45rem;
  border-radius: var(--r-xs);
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  pointer-events: none;
}

.blog-list-hero h1 {
  max-width: 22ch;
  margin: 1rem 0;
  font-size: var(--blog-list-title);
  font-weight: var(--weight-display);
}

.article-hero h1 {
  margin: 1rem 0;
  font-size: var(--blog-article-title);
  font-weight: var(--weight-display);
}

.blog-list-hero > p,
.article-hero > p,
.article-hero .article-summary {
  margin: 1rem 0 0 1rem;
  max-width: 66ch;
  color: var(--text-muted);
  font-size: var(--blog-body-size);
  line-height: var(--blog-line-height);
}

.blog-kicker {
  display: inline-block;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg-panel);
  color: var(--accent-dark);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-strong);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: var(--blog-small-size);
  line-height: 1.6;
}

.article-hero .article-meta {
  margin-inline-start: 1rem;
}

.article-meta time,
.article-meta .read-time,
.article-meta .reading-time {
  display: inline-block;
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--bg-panel);
  font-size: var(--blog-small-size);
}

.article-meta .tag {
  display: inline-block;
  max-width: 100%;
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-sm);
  color: var(--white);
  background: var(--accent-dark);
  white-space: normal;
  overflow-wrap: anywhere;
}

.blog-catalog {
  padding-block: 1rem 3rem;
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.blog-filter {
  padding: 0.65rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg-panel);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--blog-small-size);
  line-height: 1.5;
  cursor: pointer;
  transition: background var(--blog-motion), border-color var(--blog-motion);
}

.blog-filter:hover {
  border-color: var(--accent);
  background: var(--blog-hover);
}

.blog-filter.is-active,
.blog-filter[aria-pressed="true"] {
  color: var(--white);
  border-color: var(--accent-dark);
  background: var(--accent-dark);
}

.blog-status {
  margin: 1rem 0;
  min-height: 1.6em;
  color: var(--text-muted);
  font-size: var(--blog-small-size);
}

.blog-card-grid,
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--blog-space);
}

.article-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--border);
  border-radius: var(--blog-radius);
  background: var(--bg-panel);
  box-shadow: var(--blog-shadow);
  transition: border-color var(--blog-motion), transform var(--blog-motion);
}

.article-card:hover,
.article-card:focus-within {
  border-top-color: var(--accent);
  transform: translateY(-3px);
}

.article-card h2,
.article-card h3 {
  margin: 1rem 0 0.65rem;
  font-size: var(--blog-card-title);
  font-weight: var(--weight-strong);
}

.article-card h2 a,
.article-card h3 a {
  color: var(--text);
  text-decoration: none;
}

.article-card h2 a:hover,
.article-card h3 a:hover {
  color: var(--accent-dark);
}

.article-card p {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
  font-size: var(--blog-body-size);
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.article-link {
  align-self: flex-start;
  margin-top: auto;
  color: var(--accent-dark);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-strong);
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

.blog-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 2rem;
  border: 1px dashed var(--border);
  border-radius: var(--blog-radius);
  color: var(--text-muted);
  background: var(--bg-panel);
  line-height: var(--blog-line-height);
}

.reading-wrap {
  padding-block: 1.25rem 0;
}

.prose,
.article-body,
[data-article-body] {
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--blog-body-size);
  line-height: var(--blog-line-height);
  overflow-wrap: break-word;
  counter-reset: blog-section;
}

.prose p,
.article-body p,
[data-article-body] p {
  margin-block: 0 1.2rem;
}

.prose h2,
.article-body h2,
[data-article-body] h2 {
  margin: 2.25rem 0 1rem;
  font-size: var(--blog-section-title);
  font-weight: var(--weight-strong);
  scroll-margin-top: var(--anchor-offset);
}

.prose > h2:first-child,
.article-body > h2:first-child,
[data-article-body] > section:first-child > h2:first-child {
  margin-top: 0.75rem;
}

.prose h2::before,
.article-body h2::before,
[data-article-body] h2::before {
  content: "";
  display: inline-block;
  width: 0.7rem;
  height: 0.7rem;
  margin-inline-end: 0.65rem;
  border: 2px solid var(--accent);
  border-radius: var(--r-xs);
  background: var(--blog-surface-warm);
  vertical-align: 0.05em;
}

.prose h3,
.article-body h3,
[data-article-body] h3 {
  margin: 1.75rem 0 0.75rem;
  font-size: var(--blog-subtitle);
  font-weight: var(--weight-strong);
}

.prose a,
.article-body a,
[data-article-body] a {
  color: var(--accent-dark);
  text-underline-offset: 0.2em;
}

.prose ul,
.prose ol,
.article-body ul,
.article-body ol {
  margin-block: 1rem 1.5rem;
  padding-inline-start: 1.5rem;
}

.prose li,
.article-body li {
  margin-block: 0.5rem;
}

.prose img,
.article-body img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--r-sm);
}

.prose hr,
.article-body hr {
  margin-block: 2rem;
  border: 0;
  border-top: 1px solid var(--border);
}

.prose .table-scroll,
.article-body .table-scroll {
  max-width: 100%;
  overflow-x: auto;
  margin-block: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
}

.prose table,
.article-body table {
  width: 100%;
  margin-block: 1.5rem;
  border-collapse: collapse;
  font-size: var(--blog-small-size);
  line-height: 1.8;
}

.prose .table-scroll table,
.article-body .table-scroll table {
  margin: 0;
  min-width: 38rem;
}

.prose th,
.prose td,
.article-body th,
.article-body td {
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  text-align: start;
  vertical-align: top;
}

.prose thead th,
.article-body thead th {
  background: var(--blog-dark);
  color: var(--blog-on-dark);
  font-weight: var(--weight-strong);
}

.prose tbody tr,
.article-body tbody tr {
  background: var(--bg-panel);
}

.prose tbody tr:nth-child(even),
.article-body tbody tr:nth-child(even) {
  background: var(--bg-panel-2);
}

.prose tbody tr:hover,
.article-body tbody tr:hover {
  background: var(--blog-hover);
}

.prose code,
.article-body code {
  padding: 0.15rem 0.35rem;
  border-radius: var(--r-xs);
  background: var(--bg-panel-2);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
  overflow-wrap: anywhere;
}

.prose pre,
.article-body pre {
  position: relative;
  max-width: 100%;
  margin-block: 1.5rem;
  padding: 3rem 1.25rem 1.25rem;
  overflow-x: auto;
  border: 1px solid var(--text-muted);
  border-radius: var(--blog-radius);
  background: var(--blog-dark);
  color: var(--blog-on-dark);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
  line-height: 1.8;
}

.prose pre::before,
.article-body pre::before {
  content: "VPNQI / REFERENCE";
  position: absolute;
  inset-block-start: 0.65rem;
  inset-inline-start: 1.25rem;
  color: var(--blog-on-dark);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
  letter-spacing: 0.06em;
}

.prose pre code,
.article-body pre code {
  padding: 0;
  background: var(--clear);
  color: inherit;
  white-space: pre;
  overflow-wrap: normal;
}

.callout,
.verdict {
  position: relative;
  margin: 1.5rem 0;
  padding: 1.25rem 1.25rem 1.25rem 3.25rem;
  border: 1px solid var(--border);
  border-inline-start: 4px solid var(--accent);
  border-radius: var(--r-sm);
  background: var(--blog-surface-warm);
  color: var(--text);
  line-height: var(--blog-line-height);
}

.callout::before {
  content: "i";
  position: absolute;
  inset-block-start: 1.35rem;
  inset-inline-start: 1rem;
  display: inline-block;
  width: 1.35rem;
  height: 1.35rem;
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-round);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-strong);
  line-height: 1.25rem;
  text-align: center;
}

.callout-warning,
.callout.warning,
.callout--warning {
  border-inline-start-color: var(--warn);
  background: var(--blog-surface-warning);
}

.callout-success,
.callout.success,
.callout--success {
  border-inline-start-color: var(--success);
  background: var(--blog-surface-success);
}

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

.callout-success::before,
.callout.success::before,
.callout--success::before {
  border-color: var(--success);
  color: var(--text);
}

.verdict {
  padding-inline-start: 1.25rem;
}

.verdict strong {
  color: var(--accent-dark);
  font-weight: var(--weight-strong);
}

.callout p:last-child,
.verdict p:last-child {
  margin-bottom: 0;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-block: 1.5rem;
}

.stat-card {
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: var(--r-sm);
  background: var(--blog-surface-warm);
  box-shadow: inset 0 1px 0 var(--hi-line);
}

.stat-card:nth-child(even) {
  border-top-color: var(--text-muted);
  background: var(--bg-panel-2);
}

.stat-num {
  display: block;
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: var(--blog-stat-size);
  font-weight: var(--weight-strong);
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.stat-card:nth-child(even) .stat-num {
  color: var(--text);
}

.stat-label {
  display: block;
  margin-top: 0.45rem;
  color: var(--text-muted);
  font-size: var(--blog-small-size);
  line-height: 1.8;
}

.prose .check-list,
.article-body .check-list,
.check-list {
  display: grid;
  gap: 0.65rem;
  margin-block: 1.5rem;
  padding: 0;
  list-style: none;
}

.check-list li {
  margin: 0;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg-panel);
  list-style: none;
}

.promo-block {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  margin-block: 2rem;
  padding: 1.75rem;
  border: 1px solid var(--accent-dark);
  border-radius: var(--blog-radius);
  background: linear-gradient(120deg, var(--accent-dark), var(--blog-promo-end));
  color: var(--white);
  box-shadow: var(--blog-shadow);
}

.promo-block > div:first-child {
  flex: 1 1 20rem;
  min-width: 0;
}

.promo-block h2 {
  margin: 0 0 0.65rem;
  color: var(--white);
  font-size: var(--blog-section-title);
}

.promo-block h2::before {
  content: none;
}

.promo-block p {
  margin: 0;
  color: var(--white);
  font-size: var(--blog-body-size);
  line-height: var(--blog-line-height);
}

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

.promo-block .btn-primary {
  border-color: var(--white);
  background: var(--white);
  color: var(--accent-dark);
}

.promo-block .btn-ghost {
  border-color: var(--white);
  background: var(--clear);
  color: var(--white);
}

.promo-block .btn-primary:hover {
  background: var(--bg-panel-2);
  color: var(--text);
}

.promo-block .btn-ghost:hover {
  background: var(--white-10);
  color: var(--white);
}

#related-posts,
#post-nav {
  box-sizing: border-box;
  width: 100%;
  max-width: calc(var(--blog-reading) + 2 * var(--blog-gutter));
  margin-inline: auto;
  padding-inline: var(--blog-gutter);
}

.reading-wrap #related-posts,
.reading-wrap #post-nav {
  max-width: 100%;
  padding-inline: 0;
}

#related-posts {
  padding-block: 1.5rem;
}

#related-posts:empty,
#post-nav:empty {
  display: none;
}

#related-posts .related-title {
  margin: 0 0 1.25rem;
  font-size: var(--blog-section-title);
}

#related-posts .related-title::before {
  content: none;
}

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

.related-card {
  padding: 1.25rem;
}

#post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  padding-block: 1.5rem 2rem;
}

.post-nav-card {
  display: block;
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--border);
  border-radius: var(--blog-radius);
  background: var(--bg-panel);
  color: var(--text);
  text-decoration: none;
  transition: border-color var(--blog-motion), transform var(--blog-motion);
}

.post-nav-card:hover,
.post-nav-card:focus-visible {
  border-color: var(--accent);
  transform: translateY(-3px);
  color: var(--text);
}

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

.post-nav-label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--accent-dark);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-strong);
}

.post-nav-title {
  display: block;
  font-size: var(--blog-body-size);
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.post-nav-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-top: 0.75rem;
  color: var(--text-muted);
  font-size: var(--blog-small-size);
}

@media (max-width: 860px) {
  .prose table,
  .article-body table,
  [data-article-body] table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
  }

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

@media (max-width: 640px) {
  .no-break {
    white-space: normal;
  }

  .blog-card-grid,
  .stat-grid,
  #post-nav {
    grid-template-columns: 1fr;
  }

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

  .article-hero,
  .blog-list-hero {
    padding-block: 2rem;
  }

  .article-hero::before,
  .blog-list-hero::before {
    inset-inline-start: calc(var(--blog-gutter) + 0.65rem);
  }

  .article-hero .article-meta,
  .article-hero > p,
  .article-hero .article-summary,
  .blog-list-hero > p {
    margin-inline-start: 0.5rem;
  }

  .article-card,
  .promo-block {
    padding: 1.25rem;
  }

  .blog-filters {
    gap: 0.5rem;
  }

  .blog-filter {
    padding-inline: 0.75rem;
  }

  .promo-actions {
    width: 100%;
  }

  .promo-actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .article-card,
  .post-nav-card,
  .blog-filter {
    transition: none;
    animation: none;
  }

  .article-card:hover,
  .article-card:focus-within,
  .post-nav-card:hover,
  .post-nav-card:focus-visible {
    transform: none;
  }
}