/* ============================================================
   Blog index + posts. Loaded after home.css and uses its tokens
   (--paper, --ink, --rust, fonts). Pages are generated by
   scripts/build-blog.mjs.
   ============================================================ */

/* Sub-pages open on a solid nav, not the transparent hero one. */
.page-blog .site-nav,
.page-post .site-nav {
  background: rgba(247, 243, 236, 0.9);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--hairline-soft);
}

.nav-links a[aria-current="page"],
.mobile-menu a[aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- index ---------- */

.blog-hero {
  padding: 150px 24px 2.5rem;
}

.blog-hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.4rem, 5.4vw, 3.9rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0.9rem 0 1.4rem;
  max-width: 18ch;
}

.blog-hero .section-lede { margin: 0; }

.blog-lead {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 2.4rem;
  align-items: center;
  padding: 1.6rem;
  margin-bottom: 3rem;
  background: var(--paper-2);
  border: 1px solid var(--hairline-soft);
  border-radius: 18px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.blog-lead:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
  border-color: var(--hairline);
}

.blog-lead img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: left top;
  border-radius: 12px;
  background: var(--paper-3);
}

.blog-lead h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  line-height: 1.18;
  letter-spacing: -0.015em;
  margin: 0.7rem 0 0.8rem;
}

.blog-lead p { color: var(--muted); margin: 0 0 1.2rem; }
.blog-lead:hover h2 { color: var(--rust); }
.blog-lead:hover .card-link .arrow { transform: translateX(4px); }

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.2rem;
}

.filter {
  font: 500 0.84rem/1 var(--font-body);
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 0.55rem 1rem;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.filter:hover { color: var(--ink); border-color: var(--ink); }

.filter.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper-2);
}

.blog-row { grid-template-columns: 160px 1fr auto; }
.blog-row .card-meta { margin-top: 0.6rem; }
.blog-row[hidden], .blog-lead[hidden] { display: none; }

.blog-thumb {
  width: 160px;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: left top;
  border-radius: 10px;
  background: var(--paper-3);
}

.blog-empty { color: var(--muted); padding: 1.5rem 0.4rem; }
.blog-follow { margin: 2.4rem 0 5rem; }

/* ---------- post ---------- */

.post-head {
  max-width: 820px;
  padding-top: 132px;
  padding-bottom: 1.6rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--muted);
  padding: 0.45rem 0.9rem 0.45rem 0.7rem;
  margin-left: -0.7rem;
  border-radius: 999px;
  transition: color 0.2s ease, background 0.2s ease;
}

.back-link:hover { color: var(--ink); background: var(--paper-3); }
.back-link .arrow { transition: transform 0.2s ease; }
.back-link:hover .arrow { transform: translateX(-3px); }

.post-tags { display: flex; gap: 0.4rem; margin: 1.6rem 0 0.9rem; }

.post-h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 4.6vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  margin: 0 0 1rem;
}

.post-dek {
  font-size: 1.15rem;
  color: var(--muted);
  margin: 0 0 1.2rem;
  max-width: 62ch;
}

.post-meta {
  display: flex;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--faint);
  margin: 0;
}

.post-cover {
  max-width: 980px;
  margin: 1rem auto 2.6rem;
}

.post-cover img {
  width: 100%;
  height: auto;
  border-radius: 16px;
  background: var(--paper-3);
}

/* ---------- prose ---------- */

.prose {
  max-width: 720px;
  font-size: 1.075rem;
  line-height: 1.78;
  color: #2e2922;
}

.prose > :first-child { margin-top: 0; }

.prose h2,
.prose h3,
.prose h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.2;
  color: var(--ink);
  scroll-margin-top: 96px;
}

.prose h2 { font-size: 1.75rem; margin: 3rem 0 1rem; }
.prose h3 { font-size: 1.32rem; margin: 2.2rem 0 0.7rem; }
.prose h4 { font-size: 1.1rem; margin: 1.8rem 0 0.5rem; }

.prose p, .prose ul, .prose ol, .prose blockquote, .prose pre, .prose table { margin: 0 0 1.3rem; }
.prose ul, .prose ol { padding-left: 1.4rem; }
.prose li { margin: 0.35rem 0; }
.prose li::marker { color: var(--rust); }
.prose strong { color: var(--ink); }

.prose a {
  color: var(--rust-deep);
  text-decoration: underline;
  text-decoration-color: rgba(180, 73, 15, 0.35);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.2s ease;
}

.prose a:hover { text-decoration-color: var(--rust); }

.prose blockquote {
  border-left: 3px solid var(--rust);
  padding: 0.2rem 0 0.2rem 1.2rem;
  color: var(--muted);
  font-style: italic;
}

.prose hr {
  border: 0;
  height: 1px;
  background: var(--hairline);
  margin: 2.6rem 0;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--paper-3);
  border-radius: 5px;
  padding: 0.12em 0.38em;
}

.prose pre {
  background: #221e19;
  color: #f2ebdf;
  border-radius: 12px;
  padding: 1.1rem 1.3rem;
  overflow-x: auto;
  font-size: 0.88rem;
  line-height: 1.6;
}

.prose pre code { background: none; padding: 0; font-size: inherit; color: inherit; }

.prose table {
  display: block;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: 0.93rem;
}

.prose th, .prose td {
  border-bottom: 1px solid var(--hairline-soft);
  padding: 0.55rem 0.8rem;
  text-align: left;
  vertical-align: top;
}

.prose th { font-weight: 600; color: var(--ink); border-bottom-color: var(--hairline); }

.prose img {
  height: auto;
  border-radius: 12px;
  margin: 1.6rem 0;
}

.prose .prose-figure {
  max-width: 100%;
  border: 1px solid var(--hairline-soft);
  background: var(--paper-2);
}

/* ---------- end of post ---------- */

.post-end {
  max-width: 720px;
  margin-top: 3.5rem;
  padding-bottom: 5rem;
}

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  border-top: 1px solid var(--hairline-soft);
  padding-top: 1.8rem;
}

.pager-link {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--hairline-soft);
  border-radius: 12px;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.pager-link:not(.is-empty):hover { border-color: var(--hairline); background: var(--paper-2); }
.pager-link.is-empty { border-color: transparent; }
.pager-next { text-align: right; }

.pager-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.02rem;
  line-height: 1.3;
}

.pager-link:hover .pager-title { color: var(--rust); }

/* ---------- responsive ---------- */

@media (max-width: 880px) {
  .blog-hero { padding-top: 120px; }
  .blog-lead { grid-template-columns: 1fr; gap: 1.4rem; padding: 1.1rem; }
  .post-head { padding-top: 104px; }
}

@media (max-width: 640px) {
  .blog-row { grid-template-columns: 1fr; }
  .blog-thumb { width: 100%; }
  .pager { grid-template-columns: 1fr; }
  .pager-next { text-align: left; }
  .pager-link.is-empty { display: none; }
  .prose { font-size: 1.03rem; }
}