:root {
  --blog-reading: 56rem;
  --blog-gutter: max(1.5rem, var(--gutter));
  --blog-copy-size: 1rem;
  --blog-small-size: 0.875rem;
  --blog-tiny-size: 0.75rem;
  --blog-list-title: clamp(2rem, 4.5vw, 3rem);
  --blog-article-title: clamp(1.75rem, 3.8vw, 2.6rem);
  --blog-section-title: clamp(1.25rem, 2.4vw, 1.6rem);
  --blog-card-title: 1.2rem;
  --blog-subtitle: 1.3rem;
  --blog-stat-size: 1.75rem;
  --blog-stamp-size: 6rem;
  --blog-tracking: -0.015em;
  --blog-leading: 1.9;
  --blog-card-shadow: 0 16px 48px var(--accent-08);
  --blog-terminal: var(--accent-dark);
  --blog-on-color: var(--panel);
}

.blog-index,
body:has([data-article-body]) {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
}

.blog-index *,
.reading-wrap *,
.article-hero *,
.breadcrumbs *,
#related-posts *,
#post-nav * {
  box-sizing: border-box;
}

.blog-list-wrap {
  padding-bottom: 3rem;
}

.blog-index h1,
.blog-index h2,
.blog-index h3,
.article-hero h1,
.prose h2,
.prose h3,
#related-posts h2,
#related-posts h3 {
  display: block;
  font-family: var(--font-display);
  letter-spacing: var(--blog-tracking);
  text-wrap: pretty;
  overflow-wrap: anywhere;
}

.blog-skip {
  position: fixed;
  inset-block-start: 1rem;
  inset-inline-start: 1rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  transform: translateY(-200%);
  border-radius: var(--r-btn);
  background: var(--accent-dark);
  color: var(--blog-on-color);
}

.blog-skip:focus {
  transform: none;
}

.blog-index :focus-visible,
.reading-wrap :focus-visible,
.article-hero :focus-visible,
#related-posts :focus-visible,
#post-nav :focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.breadcrumbs {
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--muted);
  font-size: var(--blog-small-size);
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li + li::before {
  content: "/";
  margin-inline-end: 0.65rem;
  color: var(--muted);
}

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

.blog-list-hero {
  padding-block: 2rem 3rem;
  max-width: 48rem;
}

.blog-eyebrow {
  margin: 0 0 1rem;
  color: var(--accent-dark);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-bold);
}

.blog-list-hero h1 {
  margin: 0 0 1rem;
  font-size: var(--blog-list-title);
  font-weight: var(--weight-black);
  line-height: 1.25;
}

.blog-lede {
  margin: 0;
  color: var(--muted);
  font-size: var(--text-lede);
  line-height: 1.8;
}

.blog-catalog-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.5rem;
}

.blog-catalog-heading h2 {
  margin: 0;
  font-size: var(--blog-section-title);
}

#blog-results-status {
  margin: 0;
  color: var(--muted);
  font-size: var(--blog-small-size);
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-block: 1.5rem 2rem;
}

.blog-filters button {
  min-height: 2.75rem;
  padding: 0.65rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--panel);
  color: var(--muted);
  font-family: var(--font-body);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-medium);
  cursor: pointer;
  transition: background var(--ease-fast), border-color var(--ease-fast), color var(--ease-fast);
}

.blog-filters button:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
}

.blog-filters button[aria-pressed="true"] {
  border-color: var(--accent-dark);
  background: var(--accent-dark);
  color: var(--blog-on-color);
}

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

.blog-post-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  border-radius: var(--r-card);
  background: var(--panel);
  box-shadow: var(--blog-card-shadow);
  transition: border-color var(--ease-fast), transform var(--ease-fast);
}

.blog-post-card:nth-child(even) {
  border-top-color: var(--accent-dark);
  background: linear-gradient(145deg, var(--panel), var(--panel-2));
}

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

.blog-post-card .article-body {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 1.75rem;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-items: center;
  gap: 0.5rem 0.75rem;
  color: var(--muted);
  font-family: var(--font-body);
  font-size: var(--blog-small-size);
  line-height: 1.6;
}

.blog-tag,
.article-meta .badge {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-pill);
  background: var(--accent-dark);
  color: var(--blog-on-color);
  font-size: var(--blog-tiny-size);
  font-weight: var(--weight-semibold);
}

.blog-post-card h3 {
  margin: 1.1rem 0 0.75rem;
  font-size: var(--blog-card-title);
  line-height: 1.65;
}

.blog-post-card h3 a,
.related-card h3 a {
  color: var(--ink);
  text-decoration: none;
}

.blog-post-card h3 a:hover,
.related-card h3 a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.article-summary {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: var(--blog-copy-size);
  line-height: 1.85;
}

.blog-read-link {
  align-self: flex-start;
  margin-top: auto;
  color: var(--accent-dark);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-bold);
  text-decoration: none;
}

.blog-read-link:hover {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.blog-empty {
  grid-column: 1 / -1;
  padding: 2rem;
  border: 1px dashed var(--accent-line);
  border-radius: var(--r-pane);
  background: var(--panel-2);
  color: var(--muted);
  line-height: 1.8;
}

.blog-empty a,
.blog-help-note a {
  color: var(--accent-dark);
  text-underline-offset: 0.2em;
}

.blog-help-note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  margin-block: 2.5rem 1rem;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--r-pane);
  background: var(--panel-2);
  font-size: var(--blog-copy-size);
  line-height: 1.8;
}

.blog-help-note p {
  flex: 1 1 25rem;
  margin: 0;
}

.blog-help-note a {
  flex-shrink: 0;
  font-weight: var(--weight-semibold);
}

/* Shared reading-column geometry, including the inset hero text. */
.reading-wrap,
.article-hero,
body:has([data-article-body]) .breadcrumbs,
body:has([data-article-body]) main > .promo-block,
body:has([data-article-body]) main > #related-posts,
body:has([data-article-body]) main > #post-nav {
  box-sizing: border-box;
  width: 100%;
  max-width: calc(var(--blog-reading) + var(--blog-gutter) + var(--blog-gutter));
  margin-inline: auto;
  padding-inline: var(--blog-gutter);
}

.reading-wrap .article-hero,
.reading-wrap .reading-wrap,
.reading-wrap .breadcrumbs,
.reading-wrap #related-posts,
.reading-wrap #post-nav {
  width: 100%;
  max-width: none;
  margin-inline: 0;
}

.reading-wrap .reading-wrap,
.reading-wrap .breadcrumbs,
.reading-wrap #related-posts,
.reading-wrap #post-nav {
  padding-inline: 0;
}

.reading-wrap .article-hero {
  width: calc(100% + var(--blog-gutter) + var(--blog-gutter));
  max-width: none;
  margin-inline: calc(-1 * var(--blog-gutter));
  padding-inline: var(--blog-gutter);
}

.article-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  margin-block: 0 2rem;
  padding-block: 2rem;
  border: 0;
  border-radius: var(--r-card);
  background: var(--panel-2);
  color: var(--ink);
}

.article-hero::before {
  content: "QIU";
  position: absolute;
  z-index: -1;
  inset-block-start: 1.4rem;
  inset-inline-end: 1.5rem;
  display: grid;
  place-items: center;
  width: var(--blog-stamp-size);
  height: var(--blog-stamp-size);
  border: 4px double var(--accent-line);
  border-radius: var(--r-round);
  color: var(--accent-line);
  font-family: var(--font-display);
  font-size: var(--blog-stat-size);
  font-weight: var(--weight-black);
  letter-spacing: 0.08em;
  transform: rotate(-12deg);
  pointer-events: none;
}

.article-hero::after {
  content: none;
}

.article-hero .article-meta {
  position: relative;
  margin: 0 0 1.25rem;
  padding-inline-end: calc(var(--blog-stamp-size) + 0.5rem);
}

.article-hero .article-meta time,
.article-hero .article-meta > span:not(.blog-tag):not(.badge),
.article-hero .article-readtime,
.article-hero .read-time {
  padding: 0.25rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--panel);
  color: var(--muted);
  font-size: var(--blog-small-size);
}

.article-hero h1 {
  position: relative;
  margin: 0 0 1rem;
  font-size: var(--blog-article-title);
  font-weight: var(--weight-heavy);
  line-height: 1.45;
}

.article-hero > p,
.article-hero .article-summary,
.article-hero .article-deck {
  margin: 0;
  color: var(--muted);
  font-size: var(--blog-copy-size);
  line-height: var(--blog-leading);
}

.prose[data-article-body] {
  max-width: var(--blog-reading);
  margin-inline: auto;
  min-width: 0;
  padding-block: 0 1.5rem;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--blog-copy-size);
  line-height: var(--blog-leading);
  overflow-wrap: anywhere;
  counter-reset: blog-section;
}

.prose h2 {
  margin: 2.5rem 0 1rem;
  padding: 0;
  border: 0;
  font-size: var(--blog-section-title);
  font-weight: var(--weight-heavy);
  line-height: 1.65;
  counter-increment: blog-section;
}

.prose h2::before {
  content: counter(blog-section, decimal-leading-zero);
  display: inline-block;
  margin-inline-end: 0.65rem;
  padding: 0.1rem 0.45rem;
  border-radius: var(--r-mini);
  background: var(--accent-wash);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-bold);
  vertical-align: 0.12em;
}

.prose > h2:first-child,
.prose > section:first-child > h2:first-child {
  margin-top: 0.5rem;
}

.prose h3 {
  margin: 1.75rem 0 0.75rem;
  font-size: var(--blog-subtitle);
  font-weight: var(--weight-bold);
  line-height: 1.7;
}

.prose p,
.prose ul,
.prose ol {
  margin-block: 0 1.25rem;
}

.prose li + li {
  margin-top: 0.5rem;
}

.prose ul,
.prose ol {
  padding-inline-start: 1.5rem;
}

.prose a {
  color: var(--accent-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
}

.prose a:hover {
  text-decoration-thickness: 2px;
}

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

.prose img,
.prose svg,
.prose video {
  max-width: 100%;
  height: auto;
}

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

.prose .table-scroll {
  width: 100%;
  max-width: 100%;
  margin-block: 1.5rem;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  border: 1px solid var(--line);
  border-radius: var(--r-window);
}

.prose table {
  width: 100%;
  margin-block: 1.5rem;
  border-collapse: collapse;
  color: var(--ink);
  background: var(--panel);
  font-size: var(--blog-small-size);
  line-height: 1.8;
}

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

.prose caption {
  padding: 0.85rem 1rem;
  color: var(--muted);
  text-align: start;
  font-weight: var(--weight-medium);
}

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

.prose thead th {
  background: var(--accent-dark);
  color: var(--blog-on-color);
  font-weight: var(--weight-semibold);
}

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

.prose tbody tr:hover {
  background: var(--accent-wash);
}

.prose :not(pre) > code {
  padding: 0.15rem 0.35rem;
  border: 1px solid var(--line);
  border-radius: var(--r-mini);
  background: var(--panel-2);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
  overflow-wrap: anywhere;
}

.prose pre {
  position: relative;
  max-width: 100%;
  margin-block: 1.5rem;
  padding: 3.25rem 1.5rem 1.5rem;
  overflow-x: auto;
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-window);
  background: var(--blog-terminal);
  color: var(--blog-on-color);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
  line-height: 1.85;
  white-space: pre;
  overflow-wrap: normal;
}

.prose pre::before {
  content: "TERMINAL";
  position: absolute;
  inset-block-start: 0.75rem;
  inset-inline-start: 1.5rem;
  color: var(--blog-on-color);
  font-family: var(--font-mono);
  font-size: var(--blog-tiny-size);
  letter-spacing: 0.12em;
}

.prose pre code {
  padding: 0;
  border: 0;
  background: var(--clear);
  color: inherit;
  font: inherit;
}

.prose blockquote,
.prose .callout {
  position: relative;
  margin: 1.5rem 0;
  padding: 1.25rem 1.25rem 1.25rem 3.5rem;
  border: 0;
  border-inline-start: 4px solid var(--accent);
  border-radius: var(--r-mini);
  background: var(--accent-wash);
  color: var(--ink);
}

.prose blockquote::before,
.prose .callout::before {
  content: "i";
  position: absolute;
  inset-block-start: 1.4rem;
  inset-inline-start: 1rem;
  display: inline-grid;
  place-items: center;
  width: 1.5rem;
  height: 1.5rem;
  border: 1px solid var(--accent);
  border-radius: var(--r-round);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-bold);
  line-height: 1;
}

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

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

.prose .callout.success,
.prose .callout--success {
  border-inline-start-color: var(--ok);
  background: color-mix(in srgb, var(--ok) 10%, var(--panel));
}

.prose .callout.success::before,
.prose .callout--success::before {
  border-color: var(--ok);
  color: var(--accent-dark);
}

.prose blockquote > :last-child,
.prose .callout > :last-child,
.prose .verdict > :last-child {
  margin-bottom: 0;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr));
  gap: 1rem;
  margin-block: 1.5rem;
}

.stat-card {
  min-width: 0;
  padding: 1.5rem;
  border: 1px solid var(--accent-line);
  border-top: 3px solid var(--accent);
  border-radius: var(--r-pane);
  background: var(--accent-wash);
}

.stat-card:nth-child(even) {
  border-color: var(--line);
  border-top-color: var(--accent-dark);
  background: var(--lime-soft);
}

.stat-num {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--accent-dark);
  font-family: var(--font-display);
  font-size: var(--blog-stat-size);
  font-weight: var(--weight-heavy);
  line-height: 1.4;
}

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

.prose .check-list {
  display: grid;
  gap: 0.75rem;
  margin-block: 1.5rem;
  padding: 0;
  list-style: none;
}

.prose .check-list li {
  margin: 0;
  padding: 1rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--r-window);
  background: var(--panel);
  list-style: none;
}

.prose .check-list li::before,
.prose .check-list li::after {
  content: none;
}

.prose .verdict {
  margin-block: 1.5rem;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--accent-line);
  border-inline-start: 4px solid var(--accent);
  border-radius: var(--r-mini);
  background: var(--panel-2);
  color: var(--ink);
}

.promo-block {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-block: 1.5rem 2rem;
  padding: 2rem var(--blog-gutter);
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-card);
  background: linear-gradient(125deg, var(--accent-dark), var(--accent-deep));
  color: var(--blog-on-color);
  box-shadow: var(--blog-card-shadow);
}

.promo-block > div {
  flex: 1 1 19rem;
  min-width: 0;
}

.promo-block h3 {
  margin: 0 0 0.5rem;
  color: var(--blog-on-color);
  font-family: var(--font-display);
  font-size: var(--blog-subtitle);
  font-weight: var(--weight-heavy);
  line-height: 1.5;
}

.promo-block p {
  margin: 0;
  color: var(--blog-on-color);
  font-size: var(--blog-copy-size);
  line-height: 1.85;
}

.promo-block .btn {
  flex-shrink: 0;
  font-family: var(--font-body);
  border-radius: var(--r-btn);
}

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

.promo-block .btn-ghost,
.promo-block .btn-secondary {
  border-color: var(--panel);
  background: var(--clear);
  color: var(--blog-on-color);
}

.promo-block .btn-main:hover,
.promo-block .btn-primary:hover {
  background: var(--lime-soft);
  border-color: var(--lime-soft);
}

#related-posts {
  padding-block: 1rem 1.5rem;
}

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

#related-posts > h2 {
  margin: 0 0 1.25rem;
  color: var(--ink);
  font-size: var(--blog-section-title);
  line-height: 1.6;
}

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

.related-card {
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-top: 3px solid var(--line);
  border-radius: var(--r-pane);
  background: var(--panel);
  transition: border-color var(--ease-fast), transform var(--ease-fast);
}

.related-card h3 {
  margin: 1rem 0 0.75rem;
  font-size: var(--blog-copy-size);
  line-height: 1.8;
}

.related-card p {
  margin: 0;
  color: var(--muted);
  font-size: var(--blog-small-size);
  line-height: 1.85;
  overflow-wrap: anywhere;
}

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

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

.post-nav-card {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  min-width: 0;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--r-pane);
  background: var(--panel-2);
  color: var(--ink);
  text-decoration: none;
  transition: border-color var(--ease-fast), transform var(--ease-fast);
}

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

.post-nav-label {
  color: var(--accent-dark);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-semibold);
}

.post-nav-card strong {
  font-family: var(--font-display);
  font-size: var(--blog-copy-size);
  font-weight: var(--weight-bold);
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.post-nav-card time {
  margin-top: auto;
  color: var(--muted);
  font-size: var(--blog-small-size);
}

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

@media (max-width: 860px) {
  .prose table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
  }

  .prose .table-scroll table {
    display: table;
    width: 100%;
    max-width: none;
  }

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

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

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

  .blog-list-hero {
    padding-block: 1.5rem 2rem;
  }

  .blog-post-card .article-body {
    padding: 1.5rem;
  }

  .article-hero {
    padding-block: 1.5rem;
  }

  .article-hero::before {
    width: 4.5rem;
    height: 4.5rem;
    inset-block-start: 1.25rem;
    inset-inline-end: 1rem;
    font-size: var(--blog-card-title);
  }

  .article-hero .article-meta {
    min-height: 4.5rem;
    padding-inline-end: 4.5rem;
    gap: 0.5rem;
  }

  .prose h2 {
    margin-top: 2rem;
  }

  .prose blockquote,
  .prose .callout {
    padding-inline-end: 1rem;
  }

  .promo-block {
    align-items: flex-start;
    padding-block: 1.5rem;
  }

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

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

  .blog-help-note a {
    flex-shrink: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .blog-filters button,
  .blog-post-card,
  .related-card,
  .post-nav-card {
    transition: none;
  }

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