:root {
  --blog-reading-width: 56rem;
  --blog-list-width: 72rem;
  --blog-card-lift: -0.25rem;
  --blog-motion-fast: 180ms;
  --blog-motion-slow: 320ms;
}

.no-break {
  white-space: nowrap;
}

.blog-index-page main,
.article-page main {
  min-width: 0;
}

.blog-index-hero {
  padding: clamp(4.5rem, 10vw, 8rem) var(--gutter) clamp(3.5rem, 7vw, 6rem);
  border-bottom: 1px solid var(--color-line);
  background:
    radial-gradient(
      circle at top right,
      color-mix(in srgb, var(--color-accent) 9%, var(--color-page)),
      var(--color-page) 46%
    ),
    repeating-linear-gradient(
      0deg,
      color-mix(in srgb, var(--color-line) 25%, var(--color-page)) 0,
      color-mix(in srgb, var(--color-line) 25%, var(--color-page)) 1px,
      var(--color-page) 1px,
      var(--color-page) 0.45rem
    );
}

.blog-index-hero-inner {
  width: min(100%, var(--blog-list-width));
  margin-inline: auto;
}

.blog-kicker,
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.blog-kicker::before,
.section-eyebrow::before {
  width: 1.8rem;
  height: 1px;
  background: var(--color-accent);
  content: "";
}

.blog-index-hero h1 {
  max-width: 16ch;
  margin: 1.1rem 0 1.25rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 6vw, 3rem);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.16;
  text-wrap: pretty;
}

.blog-index-hero p {
  max-width: 42rem;
  margin: 0;
  color: var(--color-ink-soft);
  font-size: 1.05rem;
  line-height: 1.9;
}

.blog-catalog {
  width: min(calc(100% - (var(--gutter) * 2)), var(--blog-list-width));
  margin-inline: auto;
  padding-block: clamp(3.5rem, 7vw, 6rem);
}

.blog-catalog-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(16rem, 28rem);
  gap: 2rem;
  align-items: end;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-line);
}

.blog-catalog-head h2 {
  margin: 0.7rem 0 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4vw, 2.5rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.25;
  text-wrap: pretty;
}

.blog-catalog-head p {
  margin: 0;
  color: var(--color-ink-soft);
  line-height: 1.8;
}

.blog-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  padding-block: 1.75rem 2.5rem;
}

.blog-filter-button {
  appearance: none;
  min-height: 2.5rem;
  padding: 0.55rem 1rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-ink-soft);
  font: inherit;
  cursor: pointer;
  transition:
    color var(--blog-motion-fast) ease,
    background-color var(--blog-motion-fast) ease,
    border-color var(--blog-motion-fast) ease,
    transform var(--blog-motion-fast) ease;
}

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

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

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

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

.article-card {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 20rem;
  flex-direction: column;
  padding: clamp(1.5rem, 4vw, 2.25rem);
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-large);
  background: var(--color-surface);
  box-shadow: var(--shadow-panel);
  transition:
    border-color var(--blog-motion-slow) ease,
    box-shadow var(--blog-motion-slow) ease,
    transform var(--blog-motion-slow) ease;
}

.article-card::after {
  position: absolute;
  inset: 0 0 auto;
  height: 0.22rem;
  background: var(--color-accent);
  content: "";
  opacity: 0;
  transition: opacity var(--blog-motion-fast) ease;
}

.article-card:hover {
  border-color: color-mix(in srgb, var(--color-accent) 58%, var(--color-line));
  box-shadow: var(--shadow-float);
  transform: translateY(var(--blog-card-lift));
}

.article-card:hover::after {
  opacity: 1;
}

.article-card-meta,
.related-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: 0.77rem;
}

.article-card-meta .tag,
.related-card-meta .tag {
  display: inline-flex;
  align-items: center;
  min-height: 1.8rem;
  padding-inline: 0.72rem;
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--color-accent) 12%, var(--color-surface));
  color: var(--color-accent-deep);
  font-family: var(--font-body);
}

.article-card h3 {
  margin: 1.35rem 0 0.85rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.4;
  text-wrap: pretty;
}

.article-card p {
  margin: 0 0 1.5rem;
  color: var(--color-ink-soft);
  line-height: 1.85;
}

.article-card-link,
.related-card-link {
  display: inline-flex;
  gap: 0.35rem;
  align-items: center;
  width: fit-content;
  margin-top: auto;
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: none;
}

.article-card-link:hover,
.related-card-link:hover {
  color: var(--color-accent-deep);
  text-decoration: underline;
  text-underline-offset: 0.25rem;
}

.blog-empty {
  padding: 2.5rem;
  border: 1px dashed var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-surface-soft);
  color: var(--color-ink-soft);
  text-align: center;
}

.breadcrumbs {
  width: min(calc(100% - (var(--gutter) * 2)), var(--blog-reading-width));
  margin: 1.5rem auto 0;
  padding-top: 0.25rem;
  color: var(--color-ink-soft);
  font-size: 0.88rem;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li:not(:last-child)::after {
  margin-left: 0.45rem;
  color: var(--color-line);
  content: "/";
}

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

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

.article-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(12rem, 1fr);
  gap: clamp(2rem, 5vw, 3.5rem);
  width: min(calc(100% - (var(--gutter) * 2)), var(--blog-reading-width));
  margin: 2rem auto 0;
  padding: clamp(1.75rem, 5vw, 3rem);
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-large);
  background:
    linear-gradient(
      135deg,
      var(--color-surface),
      color-mix(in srgb, var(--color-accent) 7%, var(--color-surface-soft))
    );
  box-shadow: var(--shadow-panel);
}

.article-hero::before {
  position: absolute;
  top: 1rem;
  bottom: 1rem;
  left: 0.55rem;
  width: 0.24rem;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  content: "";
}

.article-hero-main {
  min-width: 0;
}

.article-hero h1 {
  margin: 0 0 1.1rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.6rem);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.22;
  text-wrap: pretty;
}

.article-hero-summary {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: 1.04rem;
  line-height: 1.85;
}

.article-meta-card {
  align-self: start;
  padding: 0.35rem 0 0.35rem 1.5rem;
  border-left: 1px solid var(--color-line);
}

.article-meta-card dl {
  margin: 0;
}

.article-meta-card div {
  padding-block: 0.85rem;
  border-bottom: 1px solid var(--color-line);
}

.article-meta-card div:last-child {
  border-bottom: 0;
}

.article-meta-card dt {
  margin-bottom: 0.35rem;
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.article-meta-card dd {
  margin: 0;
  color: var(--color-ink);
  line-height: 1.6;
}

.article-meta-card .tag {
  display: inline-flex;
  padding: 0.38rem 0.75rem;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-surface);
}

.article-body,
.prose,
.promo-block,
#related-posts,
#post-nav {
  width: min(calc(100% - (var(--gutter) * 2)), var(--blog-reading-width));
  margin-inline: auto;
}

.prose {
  padding-block: clamp(2.5rem, 6vw, 4rem);
  color: var(--color-ink);
  font-size: 1rem;
  line-height: 1.86;
  counter-reset: article-section;
}

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

.prose p,
.prose ul,
.prose ol,
.prose blockquote,
.prose pre,
.prose table,
.prose .table-scroll,
.prose .stat-grid,
.prose .check-list,
.prose .verdict,
.prose .callout {
  margin-block: 1.35rem;
}

.prose h2 {
  position: relative;
  margin: 3.1rem 0 1.1rem;
  padding: 0.75rem 0 0.75rem 3.1rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.6rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.4;
  text-wrap: pretty;
  counter-increment: article-section;
}

.prose h2::before {
  position: absolute;
  top: 0.62rem;
  left: 0;
  display: grid;
  width: 2.15rem;
  height: 2.15rem;
  place-items: center;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--color-accent) 9%, var(--color-surface));
  color: var(--color-accent);
  content: counter(article-section, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.prose h3 {
  margin: 2.2rem 0 0.85rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.5vw, 1.3rem);
  font-weight: 400;
  letter-spacing: -0.005em;
  line-height: 1.45;
  text-wrap: pretty;
}

.prose a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2rem;
}

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

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

.prose li {
  margin-block: 0.55rem;
  padding-left: 0.25rem;
}

.prose blockquote {
  padding: 1.25rem 1.5rem;
  border-left: 0.25rem solid var(--color-accent);
  border-radius: 0 var(--radius-medium) var(--radius-medium) 0;
  background: var(--color-surface-soft);
  color: var(--color-ink-soft);
}

.table-scroll,
.prose > .data-table {
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-surface);
}

.prose table {
  width: 100%;
  margin: 0;
  border-collapse: collapse;
  font-size: 0.94rem;
}

.prose th,
.prose td {
  min-width: 8rem;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--color-line);
  text-align: left;
  vertical-align: top;
}

.prose thead th {
  border-bottom-color: var(--color-ink);
  background: var(--color-ink);
  color: var(--color-surface);
  font-weight: 600;
}

.prose tbody tr:nth-child(even) {
  background: var(--color-surface-soft);
}

.prose tbody tr {
  transition: background-color var(--blog-motion-fast) ease;
}

.prose tbody tr:hover {
  background: color-mix(in srgb, var(--color-accent) 9%, var(--color-surface));
}

.prose pre {
  position: relative;
  max-width: 100%;
  padding: 3rem 1.35rem 1.35rem;
  overflow-x: auto;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-medium);
  background: var(--color-ink);
  color: var(--color-surface);
  box-shadow: var(--shadow-panel);
}

.prose pre::before {
  position: absolute;
  top: 0.9rem;
  left: 1.1rem;
  color: var(--color-accent);
  content: "●  ●  ●";
  font-size: 0.7rem;
  letter-spacing: 0.2em;
}

.prose pre::after {
  position: absolute;
  top: 0.78rem;
  right: 1rem;
  color: color-mix(in srgb, var(--color-surface) 72%, var(--color-ink));
  content: "ZVVPN / CLI";
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
}

.prose pre code {
  color: inherit;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.75;
}

.callout {
  position: relative;
  padding: 1.25rem 1.4rem 1.25rem 3.8rem;
  border: 1px solid var(--color-line);
  border-left: 0.3rem solid var(--color-accent);
  border-radius: var(--radius-medium);
  background: color-mix(in srgb, var(--color-accent) 7%, var(--color-surface));
}

.callout::before {
  position: absolute;
  top: 1.15rem;
  left: 1.2rem;
  display: grid;
  width: 1.7rem;
  height: 1.7rem;
  place-items: center;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-surface);
  content: "i";
  font-family: var(--font-display);
  font-weight: 700;
}

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

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

.callout.success {
  border-left-color: var(--color-success);
  background: color-mix(in srgb, var(--color-success) 11%, var(--color-surface));
}

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

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
  gap: 0.9rem;
}

.stat-card {
  position: relative;
  min-width: 0;
  padding: 1.25rem;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-surface);
}

.stat-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 0.24rem;
  background: var(--color-accent);
  content: "";
}

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

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

.stat-num {
  display: block;
  margin-bottom: 0.3rem;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 4vw, 2rem);
  line-height: 1.2;
}

.stat-card:nth-child(3n) .stat-num {
  color: var(--color-success);
}

.stat-label {
  color: var(--color-ink-soft);
  font-size: 0.88rem;
  line-height: 1.6;
}

.check-list {
  padding: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-surface);
  list-style: none;
}

.check-list li {
  margin: 0;
  padding: 0.95rem 1.1rem;
  border-bottom: 1px solid var(--color-line);
}

.check-list li:last-child {
  border-bottom: 0;
}

.verdict {
  padding: 1.25rem 1.4rem;
  border-left: 0.3rem solid var(--color-accent);
  border-radius: 0 var(--radius-medium) var(--radius-medium) 0;
  background: color-mix(in srgb, var(--color-accent) 9%, var(--color-surface-soft));
  color: var(--color-ink);
}

.promo-block {
  position: relative;
  display: flex;
  gap: 2rem;
  align-items: center;
  justify-content: space-between;
  padding: clamp(1.6rem, 5vw, 2.6rem);
  overflow: hidden;
  border: 1px solid var(--color-accent-deep);
  border-radius: var(--radius-large);
  background:
    radial-gradient(
      circle at top right,
      color-mix(in srgb, var(--color-surface) 22%, var(--color-accent)),
      var(--color-accent-deep) 54%
    );
  color: var(--color-surface);
  box-shadow: var(--shadow-float);
}

.promo-block::before {
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      135deg,
      color-mix(in srgb, var(--color-surface) 8%, var(--color-accent)) 0,
      color-mix(in srgb, var(--color-surface) 8%, var(--color-accent)) 1px,
      color-mix(in srgb, var(--color-accent-deep) 94%, var(--color-surface)) 1px,
      color-mix(in srgb, var(--color-accent-deep) 94%, var(--color-surface)) 0.7rem
    );
  content: "";
  opacity: 0.35;
  pointer-events: none;
}

.promo-block > * {
  position: relative;
  z-index: 1;
}

.promo-block h2 {
  margin: 0 0 0.55rem;
  color: var(--color-surface);
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 4vw, 2rem);
  font-weight: 400;
  text-wrap: pretty;
}

.promo-block p {
  max-width: 36rem;
  margin: 0;
  color: color-mix(in srgb, var(--color-surface) 84%, var(--color-accent));
  line-height: 1.75;
}

.promo-block .btn-primary {
  flex: 0 0 auto;
  border-color: var(--color-surface);
  background: var(--color-surface);
  color: var(--color-accent-deep);
}

.promo-block .btn-primary:hover {
  border-color: var(--color-surface-soft);
  background: var(--color-surface-soft);
  color: var(--color-accent-deep);
}

.promo-block .btn-secondary {
  flex: 0 0 auto;
  border-color: var(--color-surface);
  background: color-mix(in srgb, var(--color-accent-deep) 88%, var(--color-surface));
  color: var(--color-surface);
}

#related-posts {
  padding-top: 2rem;
}

.related-heading {
  margin: 0 0 1.25rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3vw, 1.8rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

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

.related-card {
  position: relative;
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 1.25rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-surface);
  transition:
    border-color var(--blog-motion-fast) ease,
    box-shadow var(--blog-motion-fast) ease,
    transform var(--blog-motion-fast) ease;
}

.related-card::before {
  position: absolute;
  inset: 0 1rem auto;
  height: 0.18rem;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  content: "";
  opacity: 0;
  transition: opacity var(--blog-motion-fast) ease;
}

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

.related-card:hover::before {
  opacity: 1;
}

.related-card h3 {
  margin: 1rem 0 0.65rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 400;
  line-height: 1.45;
  text-wrap: pretty;
}

.related-card p {
  margin: 0 0 1rem;
  color: var(--color-ink-soft);
  font-size: 0.9rem;
  line-height: 1.72;
}

#post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  padding-block: 1.25rem 2rem;
}

.post-nav-card {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 7.5rem;
  flex-direction: column;
  gap: 0.55rem;
  justify-content: center;
  padding: 1.25rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-surface-soft);
  color: var(--color-ink);
  text-decoration: none;
  transition:
    border-color var(--blog-motion-fast) ease,
    background-color var(--blog-motion-fast) ease,
    transform var(--blog-motion-fast) ease;
}

.post-nav-card:hover {
  border-color: var(--color-accent);
  background: var(--color-surface);
  transform: translateY(var(--blog-card-lift));
}

.post-nav-label {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}

.post-nav-card strong {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.5;
  text-wrap: pretty;
}

@media (max-width: 860px) {
  .blog-catalog-head,
  .article-hero {
    grid-template-columns: 1fr;
  }

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

  .article-hero-main {
    grid-row: 2;
  }

  .article-meta-card {
    display: block;
    grid-row: 1;
    padding: 0 0 1rem;
    border-bottom: 1px solid var(--color-line);
    border-left: 0;
  }

  .article-meta-card dl {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem 1.5rem;
  }

  .article-meta-card div {
    padding: 0;
    border-bottom: 0;
  }

  .prose table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
  }

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

@media (max-width: 620px) {
  .no-break {
    white-space: normal;
  }

  .blog-index-hero {
    padding-top: 3.5rem;
  }

  .blog-filter {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: thin;
  }

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

  .article-hero {
    padding: 1.5rem;
  }

  .article-hero::before {
    top: 1rem;
    bottom: auto;
    left: 1.5rem;
    width: 2.5rem;
    height: 0.22rem;
  }

  .article-meta-card {
    padding-top: 0.75rem;
  }

  .promo-block {
    align-items: flex-start;
    flex-direction: column;
  }

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

@media (prefers-reduced-motion: reduce) {
  .blog-filter-button,
  .article-card,
  .article-card::after,
  .related-card,
  .related-card::before,
  .post-nav-card,
  .prose tbody tr {
    transition-duration: 0ms;
  }

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