/* blog.css — blog index, article, and category layouts.
   Tokens only. Do not invent colours.
   Other agent: add this line to main.css after the other @imports:

   @import url("blog.css");

   Blog pages also <link> this file after the head-meta include so they
   work before that import lands. */

.blog-index { padding-block: clamp(2.5rem, 1.5rem + 4vw, 5rem); }

.blog-index__intro {
  max-width: var(--measure);
  margin-bottom: var(--space-xl);
}

.blog-index__intro h1 {
  font-size: var(--text-4xl);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-sm);
}

.blog-index__intro p {
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

.blog-cats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xs);
  margin-bottom: var(--space-xl);
}

.blog-cats a {
  display: inline-flex;
  align-items: center;
  min-height: 2.25rem;
  padding: 0 var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill, 999px);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: var(--text-sm);
  text-decoration: none;
}

.blog-cats a:hover,
.blog-cats a[aria-current="page"] {
  background: var(--color-brand-50);
  border-color: var(--color-brand-200);
  color: var(--color-brand-800);
}

.blog-grid {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
}

@media (min-width: 40rem) {
  .blog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 64rem) {
  .blog-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.blog-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  color: inherit;
  text-decoration: none;
  height: 100%;
}

.blog-card:hover { border-color: var(--color-brand-300); }
.blog-card:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 3px;
}

.blog-card__media {
  aspect-ratio: 16 / 9;
  background: var(--color-brand-800);
}

.blog-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.blog-card__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
  padding: var(--space-md);
  flex: 1;
}

.blog-card__tag {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-brand-700);
}

.blog-card__title {
  font-size: var(--text-lg);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
}

.blog-card__excerpt {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  flex: 1;
}

.blog-card__meta {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.blog-pager {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  justify-content: center;
  margin-top: var(--space-2xl);
}

.blog-pager a,
.blog-pager span[aria-current="page"] {
  min-width: 2.5rem;
  min-height: 2.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--color-text);
  font-size: var(--text-sm);
}

.blog-pager span[aria-current="page"] {
  background: var(--color-brand-500);
  border-color: var(--color-brand-500);
  color: var(--color-text-on-brand);
}

.blog-article-wrap {
  padding-block: clamp(2rem, 1.2rem + 3vw, 4rem) clamp(3rem, 2rem + 5vw, 6rem);
}

.blog-crumbs {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.blog-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xs);
}

.blog-crumbs a { color: var(--color-link); }

.blog-kicker {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-brand-700);
}

.blog-article-wrap h1 {
  font-size: var(--text-3xl);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  max-width: var(--measure);
  margin: var(--space-xs) 0 var(--space-sm);
}

.blog-meta {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.blog-hero {
  margin: 0 0 var(--space-xl);
  max-width: 48rem;
}

.blog-hero img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

/* Two-column article: prose first, TOC in a reserved column so sticky
   positioning cannot cover the reading column. */
.blog-layout {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: minmax(0, 1fr);
}

.blog-layout .prose { max-width: var(--measure); }

.blog-toc {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.blog-toc h2 {
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin: 0 0 var(--space-sm);
}

.blog-toc ol { display: grid; gap: var(--space-2xs); }
.blog-toc a {
  color: var(--color-text);
  font-size: var(--text-sm);
  text-decoration: none;
  line-height: var(--leading-snug);
}
.blog-toc a:hover { color: var(--color-link); text-decoration: underline; }

@media (min-width: 70rem) {
  .blog-layout {
    grid-template-columns: minmax(0, var(--measure)) 16rem;
    column-gap: var(--space-2xl);
    align-items: start;
  }
  .blog-layout .prose { grid-column: 1; }
  .blog-toc {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: 6.5rem;
    max-height: calc(100vh - 8rem);
    overflow: auto;
  }
}

.blog-layout .prose blockquote {
  margin: var(--space-lg) 0;
  padding: var(--space-md);
  background: var(--color-brand-50);
  border-inline-start: 3px solid var(--color-brand-500);
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

.blog-layout .prose table {
  width: 100%;
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.blog-layout .prose th,
.blog-layout .prose td {
  text-align: start;
  padding: var(--space-2xs) var(--space-xs);
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.blog-layout .prose th {
  font-weight: var(--weight-semibold);
  color: var(--color-brand-800);
}

.blog-sources {
  margin-top: var(--space-2xl);
  max-width: var(--measure);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.blog-sources h2 { font-size: var(--text-xl); margin-bottom: var(--space-sm); }
.blog-sources ol { display: grid; gap: var(--space-xs); padding-inline-start: 1.25rem; }
.blog-sources li { font-size: var(--text-sm); line-height: var(--leading-normal); }

.blog-related {
  margin-top: var(--space-xl);
  max-width: var(--measure);
}

.blog-related h2 { font-size: var(--text-xl); margin-bottom: var(--space-sm); }
.blog-related ul { display: grid; gap: var(--space-2xs); }
.blog-related a { color: var(--color-link); }

.blog-cta {
  margin-top: var(--space-2xl);
  max-width: var(--measure);
  padding: var(--space-lg);
  background: var(--color-brand-800);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
}

.blog-cta h2 { font-size: var(--text-2xl); margin-bottom: var(--space-xs); }
.blog-cta p { margin-bottom: var(--space-md); color: var(--color-brand-100); }
.blog-cta .btn--call { display: inline-flex; }

@media (prefers-reduced-motion: reduce) {
  .blog-toc { position: static; }
}