/* ------------------------------------------------------------------
   Blog layouts: index, category/tag archives, single post.
   Builds on the tokens and components in styles.css.
   ------------------------------------------------------------------ */

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.5rem 0 2rem;
}
.blog-filters .filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 36px;
  padding: 0 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
}
.blog-filters .filter-btn:hover { border-color: var(--color-border-strong); }
.blog-filters .filter-btn.is-active {
  background: var(--color-text);
  color: var(--color-bg);
  border-color: var(--color-text);
}
.filter-count { color: var(--color-text-muted); font-weight: 400; }
.filter-btn.is-active .filter-count { color: inherit; opacity: 0.7; }

.blog-grid-index { margin-bottom: 2rem; }

.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1rem;
}
.pagination-status { color: var(--color-text-muted); font-size: 0.9rem; }

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

.post-container { max-width: 820px; }

.post-header { padding: 3.5rem 0 1.5rem; }
.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}
.post-meta-sep { color: var(--color-surface-500); }
.post-cat { color: var(--color-accent); font-weight: 600; text-decoration: none; }
.post-cat:hover { text-decoration: underline; }
.post-title {
  margin: 0;
  font-size: clamp(2rem, 4vw, 2.9rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
}
.post-description {
  margin: 1rem 0 0;
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--color-text-muted);
}
.post-updated { margin: 0.75rem 0 0; font-size: 0.85rem; color: var(--color-text-muted); }

.post-cover {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  margin: 0.5rem 0 2rem;
}

.post-body { padding-bottom: 2rem; }

.post-toc {
  margin: 0 0 2rem;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}
.post-toc ul { margin: 0.5rem 0 0; padding-left: 1.1rem; }
.post-toc li { margin: 0.3rem 0; font-size: 0.92rem; }
.post-toc a { color: var(--color-text); text-decoration: none; }
.post-toc a:hover { color: var(--color-accent); }

.post-content { font-size: 1.05rem; line-height: 1.75; }
.post-content > * + * { margin-top: 1.1rem; }
.post-content h2 { margin-top: 2.5rem; font-size: 1.65rem; letter-spacing: -0.02em; }
.post-content h3 { margin-top: 2rem; font-size: 1.3rem; }
.post-content h4 { margin-top: 1.5rem; font-size: 1.1rem; }
.post-content img, .post-content video {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}
.post-content a { color: var(--color-accent); }
.post-content ul, .post-content ol { padding-left: 1.4rem; }
.post-content li + li { margin-top: 0.35rem; }
.post-content blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--color-accent);
  background: var(--color-accent-soft);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}
.post-content blockquote > :first-child { margin-top: 0; }
.post-content blockquote > :last-child { margin-bottom: 0; }
.post-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  display: block;
  overflow-x: auto;
}
.post-content th, .post-content td {
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--color-border);
  text-align: left;
}
.post-content th { background: var(--color-surface-200); }
.post-content code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  padding: 0.1em 0.35em;
  border-radius: 6px;
  background: var(--color-surface-200);
}
.post-content pre {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow-x: auto;
  line-height: 1.55;
  font-size: 0.9rem;
}
.post-content pre code { padding: 0; background: none; font-size: inherit; }
.post-content hr { border: 0; border-top: 1px solid var(--color-border); margin: 2.5rem 0; }

/* Chirpy-style callouts used in the posts: {: .prompt-tip } etc. */
.post-content .prompt-tip,
.post-content .prompt-info,
.post-content .prompt-warning,
.post-content .prompt-danger {
  border-left-width: 4px;
  background: var(--color-surface);
}
.post-content .prompt-tip { border-left-color: #16a34a; }
.post-content .prompt-info { border-left-color: #2563eb; }
.post-content .prompt-warning { border-left-color: #d97706; }
.post-content .prompt-danger { border-left-color: #dc2626; }

/* jekyll-youtube and the older open-embed wrapper */
.post-content .videoWrapper, .post-content .youtube-wrap {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #000;
}
.post-content .videoWrapper iframe, .post-content .youtube-wrap iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
/* {% youtube %} emits a bare 640x390 iframe: make it fluid */
.post-content iframe[src*="youtube.com/embed"]:not(.videoWrapper iframe):not(.youtube-wrap iframe) {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  border: 0;
  border-radius: var(--radius-lg);
  background: #000;
}

/* ---- Post footer ------------------------------------------------- */

.post-footer { padding-bottom: 4rem; }
.post-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0 0 2rem; }
.post-tag {
  padding: 0.3rem 0.7rem;
  border-radius: 8px;
  background: var(--color-surface-200);
  color: var(--color-text);
  font-size: 0.85rem;
  text-decoration: none;
}
.post-tag::before { content: "#"; color: var(--color-text-muted); }
.post-tag:hover { background: var(--color-accent-soft); color: var(--color-accent); }

.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 0 0 3rem;
}
.post-nav-link {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  font-weight: 600;
  text-decoration: none;
}
.post-nav-link:hover { border-color: var(--color-border-strong); }
.post-nav-next { text-align: right; }

.post-comments { padding-top: 2rem; border-top: 1px solid var(--color-border); }

@media (max-width: 720px) {
  .post-header { padding-top: 2.5rem; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav-next { text-align: left; }
}