/* ResearchBoard blog — builds on style.css tokens */
.blog-main { max-width: 1120px; margin: 0 auto; padding: 24px 20px 40px; }
.blog-hero { background: var(--hero); border-radius: var(--radius); padding: 28px 28px 22px; margin-bottom: 20px; }
.blog-hero h1 { font-size: 30px; font-weight: 800; letter-spacing: -0.02em; }
.blog-hero p { margin: 4px 0 16px; color: var(--text-2); font-size: 16px; }
.blog-filter button span { opacity: .7; margin-left: 4px; font-size: 12px; }

.post-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.post-card { display: flex; flex-direction: column; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden; color: var(--text); text-decoration: none !important; transition: transform .15s, border-color .15s; }
.post-card:hover { transform: translateY(-2px); border-color: var(--accent); }
.post-card[hidden] { display: none; }
.post-thumb { width: 100%; aspect-ratio: 16 / 8; object-fit: cover; background: var(--panel-2); }
.post-card-body { padding: 16px 18px 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.post-card h2 { font-size: 18px; line-height: 1.3; }
.post-card p { margin: 0; color: var(--text-2); font-size: 14px; flex: 1; }
.post-card.article { border-top: 3px solid var(--accent); }
.post-card.daily { border-top: 3px solid var(--violet); }
.post-kicker { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 12.5px; color: var(--muted); }
.kind { font-weight: 700; font-size: 11px; text-transform: uppercase; letter-spacing: .06em; padding: 2px 8px; border-radius: 99px; }
.kind.article { background: var(--accent-soft); color: var(--accent-strong); }
.kind.daily { background: var(--violet-soft); color: var(--violet); }
.post-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: 12px; }
.chip { background: var(--panel-2); border: 1px solid var(--line); color: var(--text-2); border-radius: 99px; padding: 1px 9px; font-size: 12px; }

/* single post */
.post { max-width: 760px; margin: 0 auto; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 28px 36px 32px; }
.back { font-size: 13px; font-weight: 600; display: inline-block; margin-bottom: 14px; }
.post h1 { font-size: 34px; line-height: 1.18; font-weight: 800; letter-spacing: -0.02em; margin: 10px 0 6px; }
.byline { color: var(--text-2); margin: 0 0 18px; }
.post-hero-img { width: 100%; border-radius: 12px; margin: 4px 0 18px; }
.prose { font: 18px/1.7 "Source Serif 4", Georgia, serif; color: var(--text); }
.prose h2 { font: 700 22px/1.3 var(--font); margin: 30px 0 10px; }
.prose h3 { font: 700 18px/1.3 var(--font); margin: 24px 0 8px; }
.prose p { margin: 0 0 16px; }
.prose a { text-decoration: underline; text-underline-offset: 2px; }
.prose img { max-width: 100%; border-radius: 10px; }
.prose blockquote { margin: 18px 0; padding: 4px 18px; border-left: 4px solid var(--accent); color: var(--text-2); background: var(--panel-2); border-radius: 0 8px 8px 0; }
.prose ul, .prose ol { padding-left: 24px; margin: 0 0 16px; }
.prose li { margin: 4px 0; }
.prose code { font: 14px var(--mono); background: var(--panel-2); padding: 1px 5px; border-radius: 4px; }
.prose pre { background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; overflow-x: auto; }
.prose pre code { background: none; padding: 0; }
.prose table { font: 15px/1.45 var(--font); margin: 6px 0 20px; display: block; overflow-x: auto; }
.prose th { position: static; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 28px 0; }
.post-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 20px; }
.share { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--line); }
.post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 22px; }
.post-nav a { display: flex; flex-direction: column; gap: 2px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px; color: var(--text); font-weight: 600; font-size: 14px; text-decoration: none; }
.post-nav a:hover { border-color: var(--accent); }
.post-nav a.right { text-align: right; }
.post-nav .muted { font-size: 12px; font-weight: 500; }
.blog-foot { max-width: 1120px; margin: 0 auto; display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; font-size: 12.5px; color: var(--text-2); padding: 8px 20px 32px; }

/* homepage "From the blog" */
.blog-strip { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.blog-strip .post-card h2 { font-size: 16px; }

@media (max-width: 900px) {
  .blog-strip { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .post { padding: 20px 18px 24px; border-radius: 0; border-left: 0; border-right: 0; }
  .blog-main { padding: 14px 0 28px; }
  .blog-hero { border-radius: 0; padding: 22px 16px 18px; }
  .post-grid { padding: 0 16px; }
  .post h1 { font-size: 27px; }
  .prose { font-size: 17px; }
  .post-nav { grid-template-columns: 1fr; }
}