/* ── Crumb blog: prose + index, on the same Core-Sample paper system as the site ── */

.blog-main { padding: 40px 0 8px; }
.article-wrap { max-width: 760px; }

/* breadcrumb */
.crumbtrail { font-family: var(--mono); font-size: 12.5px; letter-spacing: .02em; color: var(--ink-50); margin-bottom: 22px; }
.crumbtrail a { color: var(--ink-50); text-decoration: none; }
.crumbtrail a:hover { color: var(--amber); }
.crumbtrail span { color: var(--ink-32); }

/* post header */
.post-head { margin-bottom: 30px; padding-bottom: 26px; border-bottom: 1px solid var(--hair); }
.post-kicker { font-family: var(--mono); font-size: 12px; text-transform: uppercase; letter-spacing: .09em; color: var(--amber); margin-bottom: 12px; }
.post-title { font-family: var(--disp); font-weight: 800; font-size: clamp(30px, 4.6vw, 44px); line-height: 1.08; letter-spacing: -0.012em; margin: 0 0 14px; }
.post-meta { font-family: var(--mono); font-size: 13px; color: var(--ink-50); }
.post-meta span + span::before { content: "·"; margin: 0 8px; color: var(--ink-32); }

/* prose */
.prose { font-size: 18px; line-height: 1.72; color: var(--ink-72); }
.prose > :first-child { margin-top: 0; }
.prose p { margin: 0 0 20px; }
.prose strong { color: var(--ink); font-weight: 700; }
.prose a { color: var(--amber); text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
.prose a:hover { color: #A93709; }
.prose h2 { font-family: var(--disp); font-weight: 700; font-size: 26px; line-height: 1.2; letter-spacing: -0.01em; color: var(--ink); margin: 40px 0 14px; }
.prose h3 { font-family: var(--disp); font-weight: 700; font-size: 20px; color: var(--ink); margin: 30px 0 10px; }
.prose ul, .prose ol { margin: 0 0 20px; padding-left: 24px; }
.prose li { margin: 0 0 9px; }
.prose li::marker { color: var(--ink-32); }
.prose blockquote { margin: 24px 0; padding: 4px 20px; border-left: 3px solid var(--amber-22); color: var(--ink-72); font-style: italic; }
.prose code { font-family: var(--mono); font-size: 0.86em; background: var(--bg-sunk); border: 1px solid var(--hair); border-radius: 5px; padding: 1px 6px; color: var(--ink); }
.prose pre { background: var(--ink); color: #F4F1EA; border-radius: 12px; padding: 16px 18px; overflow-x: auto; margin: 0 0 22px; font-size: 14px; line-height: 1.6; }
.prose pre code { font-size: inherit; background: none; border: 0; padding: 0; color: inherit; }
.prose table { width: 100%; border-collapse: collapse; margin: 0 0 24px; font-size: 15.5px; }
.prose th, .prose td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--hair); vertical-align: top; }
.prose thead th { font-family: var(--mono); font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-50); border-bottom: 1px solid var(--ink-32); }
.prose img { border-radius: 12px; border: 1px solid var(--hair); margin: 8px 0 24px; }

/* in-article CTA */
.post-cta { margin: 40px 0 8px; padding: 26px 28px; background: var(--bg-card); border: 1px solid var(--hair); border-radius: 16px; }
.post-cta h3 { font-family: var(--disp); font-weight: 800; font-size: 22px; color: var(--ink); margin: 0 0 8px; }
.post-cta p { color: var(--ink-72); margin: 0 0 16px; font-size: 16px; }
.post-cta .btn { text-decoration: none; }

/* FAQ */
.post-faq { margin: 44px 0 8px; }
.post-faq h2 { font-family: var(--disp); font-weight: 800; font-size: 24px; color: var(--ink); margin: 0 0 18px; }
.post-faq details { border-bottom: 1px solid var(--hair); padding: 4px 0; }
.post-faq summary { font-family: var(--disp); font-weight: 600; font-size: 17px; color: var(--ink); padding: 14px 0; cursor: pointer; list-style: none; }
.post-faq summary::-webkit-details-marker { display: none; }
.post-faq summary::after { content: "+"; float: right; color: var(--ink-32); font-weight: 400; }
.post-faq details[open] summary::after { content: "–"; }
.post-faq .faq-a { padding: 0 0 16px; color: var(--ink-72); line-height: 1.65; }

/* related */
.related { margin: 48px 0 12px; padding-top: 28px; border-top: 1px solid var(--hair); }
.related h2 { font-family: var(--mono); font-size: 12px; text-transform: uppercase; letter-spacing: .09em; color: var(--ink-50); margin: 0 0 16px; }
.related-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.related a { display: block; padding: 16px 18px; background: var(--bg-card); border: 1px solid var(--hair); border-radius: 12px; color: var(--ink); font-family: var(--disp); font-weight: 600; font-size: 15.5px; line-height: 1.3; text-decoration: none; transition: transform .12s ease, border-color .12s ease; }
.related a:hover { transform: translateY(-2px); border-color: var(--amber-22); }

/* ── blog index ── */
.blog-hero { padding: 48px 0 32px; border-bottom: 1px solid var(--hair); margin-bottom: 36px; }
.blog-hero h1 { font-family: var(--disp); font-weight: 800; font-size: clamp(34px, 5vw, 52px); letter-spacing: -0.015em; margin: 0 0 12px; }
.blog-hero p { font-size: 18px; color: var(--ink-72); max-width: 620px; margin: 0; }
.cluster-group { margin-bottom: 44px; }
.cluster-group > h2 { font-family: var(--mono); font-size: 12.5px; text-transform: uppercase; letter-spacing: .08em; color: var(--amber); margin: 0 0 16px; padding-bottom: 10px; border-bottom: 1px solid var(--hair); }
.post-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.post-card { display: block; padding: 20px 22px; background: var(--bg-card); border: 1px solid var(--hair); border-radius: 14px; text-decoration: none; transition: transform .12s ease, border-color .12s ease; }
.post-card:hover { transform: translateY(-2px); border-color: var(--amber-22); }
.post-card h3 { font-family: var(--disp); font-weight: 700; font-size: 17px; line-height: 1.28; color: var(--ink); margin: 0 0 8px; }
.post-card p { font-size: 14px; line-height: 1.5; color: var(--ink-50); margin: 0; }

@media (max-width: 720px) {
  .related-grid, .post-list { grid-template-columns: 1fr; }
  .prose { font-size: 17px; }
}