:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #14213a;
  background: #f6f8fb;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

* { box-sizing: border-box; }
body { display: flex; flex-direction: column; min-width: 320px; min-height: 100vh; margin: 0; }
a { color: #315fe8; text-underline-offset: .2em; text-decoration-thickness: .08em; }
a:hover { color: #254ec8; }
:focus-visible { outline: 3px solid rgb(49 95 232 / .28); outline-offset: 3px; }

.blog-shell { flex: 1; width: min(1160px, calc(100% - 48px)); margin: 38px auto 80px; }
.breadcrumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 0 0 30px; color: #7b879a; font-size: .88rem; }
.breadcrumbs a { color: #586a84; text-decoration: none; }
.breadcrumbs a:hover { color: #214fcb; text-decoration: underline; }
.articles-page { background: var(--color-surface); font-family: var(--font-sans); }
.articles-page .blog-shell { margin-block: var(--space-6) var(--space-16); }
.articles-page .breadcrumbs { margin-bottom: var(--space-4); }
.blog-index-header { margin: 0 0 var(--space-4); padding: 0 0 var(--space-4); border-bottom: 1px solid var(--color-border); }
.blog-index-header .article-category { margin-bottom: var(--space-2); }
.article-category { margin: 0 0 var(--space-3); color: var(--color-brand); font-size: var(--text-xs); font-weight: var(--weight-semibold); letter-spacing: .06em; text-transform: uppercase; overflow-wrap: anywhere; }
h1, h2, h3 { color: var(--color-brand-strong); line-height: var(--line-heading); text-wrap: balance; }
.blog-index-header h1 { max-width: none; margin: 0; letter-spacing: -.035em; }
.blog-index-header > p:last-child { max-width: none; margin: var(--space-2) 0 0; color: var(--color-text-muted); line-height: var(--line-normal); }
.blog-library-heading { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-3); margin-bottom: var(--space-5); }
.blog-library-heading h2 { margin: 0; letter-spacing: -.02em; }
.blog-library-heading > span { color: var(--color-text-muted); font-size: var(--text-sm); }
.blog-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-6); align-items: stretch; }
.blog-card { display: flex; flex-direction: column; min-width: 0; overflow: hidden; border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-surface); transition: border-color var(--transition-fast), box-shadow var(--transition-fast); }
.blog-card:hover, .blog-card:focus-within { border-color: var(--color-border-strong); box-shadow: var(--shadow-sm); }
.blog-card-image { display: block; overflow: hidden; aspect-ratio: 5 / 2; background: var(--color-bg); }
.blog-card-image img { display: block; width: 100%; height: 100%; object-fit: cover; }
.blog-card-content { display: flex; flex: 1; flex-direction: column; align-items: flex-start; min-width: 0; padding: var(--space-4); }
.blog-card h3 { margin: 0; line-height: var(--line-heading); letter-spacing: -.02em; overflow-wrap: anywhere; }
.blog-card h3 a { color: inherit; text-decoration: none; }
.blog-card h3 a:hover { color: var(--color-brand); }
.blog-card-excerpt { display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; overflow: hidden; margin: var(--space-2) 0 0; color: var(--color-text-muted); line-height: var(--line-normal); overflow-wrap: anywhere; }
.blog-card-excerpt:empty { display: none; }
.blog-card .article-dates { margin-top: auto; padding-top: var(--space-3); }
.article-dates { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); margin: var(--space-4) 0 0; color: var(--color-text-muted); font-size: var(--text-sm); }
.blog-card-read { display: inline-flex; align-items: center; gap: var(--space-2); min-height: 44px; margin-top: var(--space-2); color: var(--color-brand); font-size: var(--text-sm); font-weight: var(--weight-semibold); text-decoration: none; }
.blog-card-read:hover { text-decoration: underline; }
.blog-card--no-image { grid-template-columns: minmax(0, 1fr); }
.blog-empty { grid-column: 1 / -1; margin: 0; padding: var(--space-12) var(--space-6); border: 1px dashed var(--color-border-strong); border-radius: var(--radius-lg); background: var(--color-bg); color: var(--color-text-muted); text-align: center; }
.blog-pagination { display: flex; justify-content: space-between; align-items: center; gap: var(--space-4); margin-top: var(--space-8); padding-top: var(--space-6); border-top: 1px solid var(--color-border); color: var(--color-text-muted); }
.blog-pagination a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); color: var(--color-brand-strong); font-size: var(--text-sm); font-weight: var(--weight-semibold); text-decoration: none; }
.blog-pagination a:hover { border-color: var(--color-brand); background: var(--color-brand-subtle); }

/* Article presentation uses the shared Astro token and typography endpoint. */
.blog-article { min-width: 0; }
.article-page { color: var(--color-text); background: var(--color-surface); font-family: var(--font-sans); }
.article-page .blog-shell { max-width: 1040px; margin-top: var(--space-6); }
.article-page .breadcrumbs { margin-bottom: var(--space-4); font-size: var(--text-sm); }
.article-page .breadcrumbs [aria-current="page"] { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: min(46ch, 100%); min-width: 0; }
.skip-link { position: fixed; top: var(--space-2); left: var(--space-4); z-index: 10; padding: var(--space-3) var(--space-4); border-radius: var(--radius-md); background: var(--color-brand-strong); color: var(--color-text-inverse); transform: translateY(-200%); }
.skip-link:focus { transform: translateY(0); color: var(--color-text-inverse); }
.article-header { max-width: none; margin: 0; padding: 0 0 var(--space-5); }
.article-header .article-category { display: inline-flex; align-items: center; min-height: var(--space-6); margin-bottom: var(--space-2); padding: var(--space-1) var(--space-3); border: 0; border-radius: var(--radius-sm); background: var(--color-brand-subtle); color: var(--color-brand); letter-spacing: .04em; }
.article-header h1 { max-width: none; margin: 0; line-height: var(--line-tight); letter-spacing: -.04em; overflow-wrap: anywhere; }
.article-summary { max-width: none; margin: var(--space-3) 0 0; color: var(--color-text-muted); line-height: var(--line-normal); }
.article-summary:empty { display: none; }
.article-header .article-dates { gap: var(--space-2) var(--space-4); margin-top: var(--space-3); color: var(--color-text-muted); font-size: var(--text-sm); line-height: var(--line-normal); }
.article-meta-label { margin-right: var(--space-1); color: var(--color-text); font-weight: var(--weight-medium); }
.article-header .article-read-time { padding-left: var(--space-4); border-left: 1px solid var(--color-border); }
.featured-image { max-width: 1040px; margin: 0 auto var(--space-12); overflow: hidden; border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-surface); box-shadow: var(--shadow-xs); }
.featured-image img { display: block; width: 100%; height: auto; object-fit: contain; }
.featured-image figcaption { margin: 0; padding: var(--space-3) var(--space-4); border-top: 1px solid var(--color-border-subtle); background: var(--color-bg); color: var(--color-text-muted); font-size: var(--text-sm); line-height: var(--line-normal); }
.article-layout { display: grid; grid-template-columns: minmax(0, 720px) minmax(0, 240px); justify-content: space-between; align-items: start; gap: var(--space-12); margin: var(--space-4) auto 0; }
.article-layout--solo { grid-template-columns: minmax(0, 760px); justify-content: start; }
.article-reading { grid-column: 1; grid-row: 1; min-width: 0; }
.article-rail { grid-column: 2; grid-row: 1; position: sticky; top: calc(var(--header-height) + var(--space-8)); min-width: 0; }
.article-toc { padding: 0 0 0 var(--space-5); border-left: 1px solid var(--color-border); }
.article-toc summary { color: var(--color-brand-strong); font-size: var(--text-sm); font-weight: var(--weight-semibold); cursor: pointer; min-height: 44px; }
.article-toc ol { max-height: 60vh; overflow: auto; margin: var(--space-3) 0 0; padding: 0; list-style: none; }
.article-toc a { display: block; padding: var(--space-2) 0 var(--space-2) var(--space-3); border-left: 2px solid var(--color-border-subtle); color: var(--color-text-muted); font-size: var(--text-sm); line-height: var(--line-normal); text-decoration: none; overflow-wrap: anywhere; }
.article-toc a:hover, .article-toc a:focus-visible { border-color: var(--color-brand); color: var(--color-brand); background: var(--color-brand-subtle); }
.article-toc-level-3 a { padding-left: var(--space-6); }
.article-rail-back { padding-left: var(--space-5); display: inline-flex; align-items: center; min-height: 44px; margin-top: var(--space-3); color: var(--color-text-muted); font-size: var(--text-sm); text-decoration: none; }
.article-body { color: var(--color-text); font-size: var(--text-base); line-height: var(--line-relaxed); overflow-wrap: anywhere; }
.article-body > :first-child { margin-top: 0; }
.article-body > :last-child { margin-bottom: 0; }
.article-body > * { max-width: 100%; }
.article-body p { margin: 0 0 var(--space-6); font-size: inherit; line-height: inherit; }
.article-body :is(h2,h3,h4) { color: var(--color-brand-strong); line-height: var(--line-heading); text-wrap: pretty; scroll-margin-top: calc(var(--header-height) + var(--space-8)); }
.article-body h2 { margin: var(--space-10) 0 var(--space-4); letter-spacing: -.025em; }
.article-body h3 { margin: var(--space-8) 0 var(--space-3); }
.article-body h4 { margin: var(--space-6) 0 var(--space-3); }
.article-body ul, .article-body ol { margin: var(--space-3) 0 var(--space-6); padding-left: var(--space-6); }
.article-body li { padding-left: var(--space-1); margin: var(--space-2) 0; }
.article-body li::marker { color: var(--color-accent); font-weight: var(--weight-semibold); }
.article-body a { color: var(--color-brand); font-weight: var(--weight-medium); }
.article-body strong { color: var(--color-brand-strong); font-weight: var(--weight-semibold); }
.article-body blockquote { margin: var(--space-8) 0; padding: var(--space-5) var(--space-6); border-left: 3px solid var(--color-accent); border-radius: 0 var(--radius-lg) var(--radius-lg) 0; background: var(--color-accent-subtle); }
.article-body blockquote p:last-child { margin-bottom: 0; }
.article-body img { display: block; max-width: 100%; height: auto; margin: var(--space-8) auto; border: 1px solid var(--color-border); border-radius: var(--radius-lg); }
.article-body table { display: block; width: 100%; overflow-x: auto; border-collapse: collapse; border: 1px solid var(--color-border); border-radius: var(--radius-md); font-size: var(--text-sm); }
.article-body th, .article-body td { min-width: 110px; padding: var(--space-3) var(--space-4); border: 1px solid var(--color-border); text-align: left; vertical-align: top; }
.article-body th { background: var(--color-surface-subtle); color: var(--color-brand-strong); font-weight: var(--weight-semibold); }
.article-body tbody tr:nth-child(even) { background: var(--color-bg); }
.article-body code { padding: var(--space-1); border: 1px solid var(--color-border-subtle); border-radius: var(--radius-xs); background: var(--color-bg); font-family: var(--font-mono); font-size: .88em; }
.article-body pre { max-width: 100%; overflow-x: auto; padding: var(--space-5); border-radius: var(--radius-lg); background: var(--color-brand-strong); color: var(--color-text-inverse); font-size: var(--text-sm); line-height: var(--line-relaxed); white-space: pre; }
.article-body pre code { padding: 0; border: 0; background: transparent; color: inherit; }
.article-body hr { margin: var(--space-10) 0; border: 0; border-top: 1px solid var(--color-border); }
.article-end { display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-4); margin-top: var(--space-10); padding-top: var(--space-4); border-top: 1px solid var(--color-border); }
.article-end a { display: inline-flex; align-items: center; min-height: 44px; font-size: var(--text-sm); font-weight: var(--weight-semibold); text-decoration: none; }
#article-title { scroll-margin-top: calc(var(--header-height) + var(--space-8)); }
@media (max-width: 900px) {
  .article-layout { grid-template-columns: minmax(0, 760px); gap: var(--space-5); }
  .article-rail { grid-column: 1; grid-row: 1; position: static; }
  .article-reading { grid-column: 1; grid-row: 2; }
  .article-layout--solo .article-reading { grid-row: 1; }
  .article-toc { padding: var(--space-3) var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-bg); }
  .article-toc ol { max-height: 220px; }
  .article-rail-back { display: none; }
}

/* PHP uses the same footer markup and styles as the static Astro pages. */
.site-footer > .container { width: min(var(--container-max), calc(100% - var(--space-12))); margin-inline: auto; }
@media (max-width: 640px) {
  .site-footer > .container { width: calc(100% - var(--space-8)); }
}

@media (max-width: 640px) {
  .blog-shell { width: min(100% - 32px, 760px); margin: 24px auto 48px; }
  .breadcrumbs { margin-bottom: 18px; }
  .blog-index-header { margin-bottom: var(--space-4); padding-bottom: var(--space-4); }
  .blog-grid { grid-template-columns: 1fr; gap: 16px; }
  .blog-card-content { padding: var(--space-4); }
  .featured-image { margin-bottom: var(--space-6); }
  .article-header { padding-top: var(--space-2); }
  .article-header .article-dates { gap: var(--space-2); }
  .article-body :is(h2,h3,h4), #article-title { scroll-margin-top: calc(2 * var(--header-height) + var(--space-4)); }
  .blog-pagination { flex-wrap: wrap; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}