.blog-page {
  background: var(--color-surface);
}

.blog-hero,
.post-header {
  border-block-end: 1px solid var(--color-border);
  background: var(--color-surface-soft);
}

.blog-hero__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-3) var(--space-8);
  padding-block: var(--page-start-space);
}

.blog-hero__label {
  grid-column: 1 / -1;
  color: var(--color-primary-700);
  font-size: var(--text-sm);
  font-weight: 900;
}

.blog-hero h1 {
  grid-column: 1 / -1;
  min-width: 0;
  margin: 0;
  color: var(--color-ink);
  font-size: var(--text-display);
  font-weight: 950;
  letter-spacing: -0.04em;
  line-height: 1.2;
  overflow-wrap: break-word;
  text-wrap: balance;
}

.blog-hero__summary {
  display: flex;
  grid-column: 1 / -1;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-6);
  margin-block-start: var(--space-5);
}

.blog-hero__summary p {
  max-width: 70ch;
  color: var(--color-muted);
  font-size: var(--text-lg);
  line-height: 2;
  text-wrap: pretty;
}

.blog-hero__summary a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary-700);
  font-size: var(--text-sm);
  font-weight: 850;
}

.blog-hero__summary a span {
  transition: transform var(--transition-fast);
}

.blog-hero__summary a:hover span,
.blog-hero__summary a:focus-visible span {
  transform: translateY(3px);
}

.blog-archive {
  padding-block: var(--section-space);
}

.blog-archive__heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-8);
  margin-block-end: var(--space-10);
}

.blog-archive__heading > div:first-child {
  display: grid;
  gap: var(--space-3);
}

.blog-archive__heading h2,
.related-posts h2 {
  margin: 0;
  color: var(--color-ink);
  font-size: var(--text-3xl);
  font-weight: 950;
  letter-spacing: -0.035em;
  line-height: 1.45;
  text-wrap: balance;
}

.blog-archive__heading p {
  color: var(--color-muted);
}

.blog-filter {
  display: flex;
  max-width: 760px;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--space-2);
}

.blog-filter__button {
  min-height: 44px;
  padding-inline: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-muted);
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: 800;
  transition: border-color var(--transition-fast),
    background-color var(--transition-fast),
    color var(--transition-fast);
}

.blog-filter__button:hover,
.blog-filter__button:focus-visible {
  border-color: var(--color-primary-500);
  color: var(--color-primary-700);
}

.blog-filter__button.is-active,
.blog-filter__button[aria-pressed="true"] {
  border-color: var(--color-action);
  background: var(--color-action);
  color: var(--color-on-primary);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-6);
  margin: 0;
  padding: 0;
  list-style: none;
}

.blog-card {
  min-width: 0;
  grid-column: span 4;
}

.blog-card--lead,
.blog-card--wide {
  grid-column: span 8;
}

.blog-grid[data-active-filter]:not([data-active-filter="all"]) .blog-card {
  grid-column: span 4;
}

.blog-card[hidden] {
  display: none;
}

.blog-card__article,
.blog-card__link {
  height: 100%;
}

.blog-card__link {
  position: relative;
  display: grid;
  min-height: 390px;
  grid-template-rows: auto 1fr auto;
  gap: var(--space-8);
  padding: clamp(var(--space-6), 3vw, var(--space-8));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-soft);
  transition: border-color var(--transition-base),
    background-color var(--transition-base),
    transform var(--transition-base);
}

.blog-card__link:hover,
.blog-card__link:focus-visible {
  border-color: var(--color-primary-500);
  background: var(--color-primary-100);
  transform: translateY(-4px);
}

.blog-card__link:focus-visible {
  outline: 0;
  box-shadow: var(--shadow-focus);
}

.blog-card--lead .blog-card__link {
  min-height: 430px;
  border-color: var(--color-operations-border);
  background: var(--color-operations);
  color: var(--color-operations-text);
}

.blog-card--lead .blog-card__link:hover,
.blog-card--lead .blog-card__link:focus-visible {
  border-color: var(--color-signal);
  background: var(--color-operations-elevated);
}

.blog-card__meta,
.post-header__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3) var(--space-5);
  color: var(--color-subtle);
  font-size: var(--text-sm);
  font-weight: 750;
  font-variant-numeric: tabular-nums;
}

.blog-card__meta span,
.post-header__meta span:first-child {
  color: var(--color-primary-700);
}

.blog-card--lead .blog-card__meta {
  color: var(--color-operations-muted);
}

.blog-card--lead .blog-card__meta span {
  color: var(--color-signal-soft);
}

.blog-card__body {
  align-self: start;
}

.blog-card h2 {
  margin: 0;
  color: var(--color-ink);
  font-size: var(--text-2xl);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.5;
  overflow-wrap: break-word;
  text-wrap: balance;
}

.blog-card__body p {
  margin: var(--space-5) 0 0;
  color: var(--color-muted);
  line-height: 1.95;
  text-wrap: pretty;
}

.blog-card--lead h2 {
  color: var(--color-operations-text);
  font-size: var(--text-3xl);
  font-weight: 950;
  line-height: 1.45;
}

.blog-card--lead .blog-card__body p {
  max-width: 68ch;
  color: var(--color-operations-muted);
  font-size: var(--text-lg);
}

.blog-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  padding-block-start: var(--space-5);
  border-block-start: 1px solid var(--color-border);
}

.blog-card--lead .blog-card__footer {
  border-color: var(--color-operations-border);
}

.blog-card__number {
  color: var(--color-subtle);
  font-size: var(--text-sm);
  font-weight: 850;
  font-variant-numeric: tabular-nums;
}

.blog-card__read {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary-700);
  font-size: var(--text-sm);
  font-weight: 850;
}

.blog-card__read span {
  transition: transform var(--transition-fast);
}

.blog-card__link:hover .blog-card__read span,
.blog-card__link:focus-visible .blog-card__read span {
  transform: translateX(-3px);
}

.blog-card--lead .blog-card__number {
  color: var(--color-operations-muted);
}

.blog-card--lead .blog-card__read {
  color: var(--color-signal-soft);
}

@media (min-width: 1025px) {
  .blog-grid:not([data-active-filter]) .blog-card--wide:not(.blog-card--lead) .blog-card__body,
  .blog-grid[data-active-filter="all"] .blog-card--wide:not(.blog-card--lead) .blog-card__body {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(240px, 0.85fr);
    align-items: start;
    gap: var(--space-10);
  }

  .blog-grid:not([data-active-filter]) .blog-card--wide:not(.blog-card--lead) .blog-card__body p,
  .blog-grid[data-active-filter="all"] .blog-card--wide:not(.blog-card--lead) .blog-card__body p {
    margin: 0;
  }

  .blog-grid[data-active-filter]:not([data-active-filter="all"]) .blog-card[data-filter-span="half"] {
    grid-column: span 6;
  }

  .blog-grid[data-active-filter]:not([data-active-filter="all"]) .blog-card[data-filter-span="wide"] {
    grid-column: 3 / span 8;
  }
}

.blog-load-more {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  margin-block-start: var(--space-10);
  padding-block-start: var(--space-8);
  border-block-start: 1px solid var(--color-border);
}

.blog-load-more[hidden] {
  display: none;
}

.blog-load-more p {
  color: var(--color-subtle);
  font-size: var(--text-sm);
  font-weight: 750;
}

.post-header__inner {
  padding-block: var(--page-start-space);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-block-end: var(--space-10);
  color: var(--color-subtle);
  font-size: var(--text-sm);
}

.breadcrumbs a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
}

.breadcrumbs a:hover,
.breadcrumbs a:focus-visible {
  color: var(--color-primary-700);
}

.post-header__meta {
  justify-content: flex-start;
  margin-block-end: var(--space-5);
}

.post-header h1 {
  width: 100%;
  margin: 0;
  color: var(--color-ink);
  font-size: var(--text-display);
  font-weight: 950;
  letter-spacing: -0.04em;
  line-height: 1.2;
  overflow-wrap: break-word;
  text-wrap: balance;
}

.post-header__inner > p {
  max-width: 72ch;
  margin: var(--space-8) 0 0;
  color: var(--color-muted);
  font-size: var(--text-lg);
  line-height: 2;
  text-wrap: pretty;
}

.post-layout {
  display: grid;
  grid-template-columns: minmax(210px, 270px) minmax(0, 1fr);
  gap: clamp(var(--space-10), 7vw, var(--space-24));
  padding-block: var(--section-space);
}

.post-toc {
  align-self: stretch;
}

.post-toc__inner {
  position: sticky;
  max-height: calc(100vh - 132px);
  overflow-y: auto;
  inset-block-start: 108px;
  scrollbar-width: thin;
}

.post-toc__summary {
  display: block;
  margin: 0 0 var(--space-5);
  color: var(--color-ink);
  font-size: var(--text-lg);
  font-weight: 900;
  list-style: none;
}

.post-toc__summary::-webkit-details-marker {
  display: none;
}

.post-toc__summary > :last-child {
  display: none;
}

.post-toc ol {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.post-toc a {
  display: flex;
  min-height: 44px;
  align-items: center;
  padding-block: var(--space-1);
  color: var(--color-subtle);
  font-size: var(--text-sm);
  line-height: 1.7;
}

.post-toc a:hover,
.post-toc a:focus-visible {
  color: var(--color-primary-700);
}

.post-content {
  width: 100%;
  min-width: 0;
  justify-self: start;
  color: var(--color-text);
  font-size: var(--text-md);
  line-height: 2.05;
}

.post-content > :first-child {
  margin-block-start: 0;
}

.post-content :where(h2, h3, h4) {
  color: var(--color-ink);
  font-weight: 900;
  letter-spacing: -0.03em;
  scroll-margin-top: 112px;
  text-wrap: balance;
}

.post-content h2 {
  margin: var(--space-16) 0 var(--space-5);
  font-size: var(--text-3xl);
  font-weight: 950;
  line-height: 1.45;
}

.post-content h3 {
  margin: var(--space-10) 0 var(--space-4);
  font-size: var(--text-xl);
  line-height: 1.5;
}

.post-content :where(p, ul, ol, blockquote, table) {
  margin-block: 0 var(--space-6);
}

.post-content :where(p, li) {
  text-wrap: pretty;
}

.post-content :where(ul, ol) {
  display: grid;
  gap: var(--space-3);
  padding-inline-start: var(--space-6);
}

.post-content a {
  color: var(--color-primary-700);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
}

.post-content blockquote {
  padding-block: var(--space-5);
  border-block: 1px solid var(--color-border-strong);
  color: var(--color-muted);
  font-size: var(--text-lg);
}

.post-content table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
}

.post-content :where(th, td) {
  min-width: 140px;
  padding: var(--space-4);
  border-block-end: 1px solid var(--color-border);
  text-align: start;
}

.related-posts {
  padding-block: var(--section-space);
  border-block-start: 1px solid var(--color-border);
  background: var(--color-surface-soft);
}

.related-posts header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-5);
  margin-block-end: var(--space-8);
}

.related-posts header a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--color-primary-700);
  font-size: var(--text-sm);
  font-weight: 850;
}

.related-posts ul {
  margin: 0;
  padding: 0;
  border-block-end: 1px solid var(--color-border);
  list-style: none;
}

.related-posts li {
  border-block-start: 1px solid var(--color-border);
}

.related-posts li a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-8);
  padding-block: var(--space-6);
}

.related-posts li span {
  color: var(--color-ink);
  font-size: var(--text-lg);
  font-weight: 850;
}

.related-posts li time {
  flex: 0 0 auto;
  color: var(--color-subtle);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 1024px) {
  .blog-hero__layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .blog-hero__label {
    grid-column: auto;
  }

  .blog-hero__summary {
    max-width: none;
  }

  .blog-archive__heading {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .blog-card,
  .blog-card--lead,
  .blog-card--wide,
  .blog-grid[data-active-filter]:not([data-active-filter="all"]) .blog-card {
    grid-column: span 6;
  }

  .post-layout {
    grid-template-columns: minmax(180px, 220px) minmax(0, 1fr);
    gap: var(--space-10);
  }
}

@media (max-width: 767px) {
  .blog-hero__summary {
    align-items: flex-start;
    flex-direction: column;
  }

  .blog-hero__summary p,
  .post-header__inner > p,
  .blog-card--lead .blog-card__body p {
    font-size: var(--text-md);
  }

  .blog-filter {
    width: 100%;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-block-end: var(--space-2);
    scrollbar-width: thin;
  }

  .blog-filter__button {
    flex: 0 0 auto;
  }

  .blog-card,
  .blog-card--lead,
  .blog-card--wide,
  .blog-grid[data-active-filter]:not([data-active-filter="all"]) .blog-card {
    grid-column: 1 / -1;
  }

  .blog-card__link,
  .blog-card--lead .blog-card__link {
    min-height: 350px;
  }

  .blog-load-more {
    align-items: stretch;
    flex-direction: column;
  }

  .blog-load-more .button {
    width: 100%;
  }

  .post-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .post-toc__inner {
    position: static;
    max-height: none;
    overflow: visible;
    padding-block-end: var(--space-8);
    border-block-end: 1px solid var(--color-border);
  }

  .post-toc__summary {
    display: flex;
    min-height: 44px;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    margin: 0;
    cursor: pointer;
  }

  .post-toc__summary > :last-child {
    display: block;
    color: var(--color-primary-600);
    font-size: var(--text-xl);
    font-weight: 700;
    line-height: 1;
    transition: transform var(--transition-base);
  }

  .post-toc__details[open] .post-toc__summary {
    margin-block-end: var(--space-5);
  }

  .post-toc__details[open] .post-toc__summary > :last-child {
    transform: rotate(45deg);
  }

  .post-content {
    max-width: none;
    font-size: var(--text-md);
  }

  .related-posts header,
  .related-posts li a {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  .blog-hero__summary a span,
  .blog-card__link,
  .blog-card__read span,
  .post-toc__summary > :last-child {
    transition: none;
  }
}

@media print {
  .blog-post-page .site-header,
  .blog-post-page .site-footer,
  .blog-post-page .post-toc,
  .blog-post-page .related-posts,
  .blog-post-page .back-to-top {
    display: none;
  }

  .blog-post-page .post-layout {
    display: block;
    padding: 0;
  }
}