/* ═══════════════════════════════════════════════════════════
   PAGE: Blog — List page, post prose styles
   ═══════════════════════════════════════════════════════════ */

/* ── Blog List Page Header ───────────────────────────────── */
.blog-header {
  padding-top: calc(var(--nav-h) + var(--ruler-h) + 72px);
  padding-bottom: 56px;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.blog-header .dot-grid-subtle {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.blog-header::before {
  content: '';
  position: absolute;
  top: calc(var(--nav-h) + var(--ruler-h) + 16px);
  left: 20px;
  width: 16px; height: 16px;
  border-top: 1.5px solid var(--primary);
  border-left: 1.5px solid var(--primary);
  opacity: 0.4;
  z-index: 3;
}
.blog-header .container { position: relative; z-index: 2; }

.page-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--primary);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-5);
  opacity: 0.7;
}
.page-title {
  font-family: var(--font-display);
  font-weight: var(--weight-extrabold);
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: var(--space-5);
}
.page-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 500px;
  line-height: 1.65;
}

/* ── Topic Filter Pills ──────────────────────────────────── */
.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-8);
}
.blog-filter-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 5px 12px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  line-height: 1;
}
.blog-filter-btn:hover {
  color: var(--text-secondary);
  border-color: var(--border-bright);
}
.blog-filter-btn.is-active {
  color: var(--primary);
  border-color: var(--primary);
  background: rgba(1, 158, 219, 0.08);
}

/* ── Featured Post ───────────────────────────────────────── */
.blog-featured-section {
  padding: var(--space-16) 0;
}
.blog-featured {
  border: 1px solid var(--border);
  border-radius: 3px;
  overflow: hidden;
  background: var(--surface);
  transition: border-color 0.2s;
}
.blog-featured:hover { border-color: var(--border-bright); }

.blog-featured__link {
  display: flex;
  min-height: 360px;
  text-decoration: none;
  color: inherit;
}
.blog-featured__image {
  width: 42%;
  flex-shrink: 0;
  overflow: hidden;
  border-right: 1px solid var(--border);
}
.blog-featured__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(0.85) brightness(0.88);
  transition: filter 0.3s ease, transform 0.3s ease;
}
.blog-featured:hover .blog-featured__image img {
  filter: saturate(1) brightness(1);
  transform: scale(1.03);
}
.blog-featured__image--empty {
  background: var(--surface-raised);
  display: flex;
  align-items: center;
  justify-content: center;
}
.blog-featured__placeholder {
  padding: var(--space-8);
  opacity: 0.1;
}
.blog-featured__placeholder-text {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: var(--weight-extrabold);
  color: var(--text);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.blog-featured__content {
  flex: 1;
  padding: var(--space-10);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  position: relative;
}
.blog-featured__content::after {
  content: '';
  position: absolute;
  top: 16px;
  right: 16px;
  width: 12px; height: 12px;
  border-top: 1.5px solid var(--primary);
  border-right: 1.5px solid var(--primary);
  opacity: 0.3;
}
.blog-featured__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.blog-featured__date {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}
.blog-featured__tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.blog-featured__title {
  font-family: var(--font-display);
  font-weight: var(--weight-extrabold);
  font-size: clamp(24px, 3vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 0;
  transition: color 0.2s;
}
.blog-featured:hover .blog-featured__title { color: var(--primary); }
.blog-featured__desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin: 0;
  flex: 1;
  max-width: 520px;
}
.blog-featured__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-5);
  border-top: 1px dashed var(--border);
  margin-top: auto;
}
.blog-featured__cta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--primary);
  letter-spacing: 0.05em;
}

/* ── Reading Time ────────────────────────────────────────── */
.blog-readtime {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* ── Post List ───────────────────────────────────────────── */
.blog-list-section {
  padding: var(--space-16) 0 var(--space-24);
  border-top: 1px solid var(--border);
}
.blog-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-8);
}
.blog-list-item {
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--surface);
  transition: background 0.15s, border-color 0.2s;
}
.blog-list-item:hover {
  background: var(--surface-raised);
  border-color: var(--border-bright);
}

.blog-list-item__link {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  align-items: start;
  gap: var(--space-6);
  padding: var(--space-5) var(--space-6);
  text-decoration: none;
  color: inherit;
}
.blog-list-item__date {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  padding-top: 3px;
  white-space: nowrap;
}
.blog-list-item__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.blog-list-item__tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.blog-list-item__title {
  font-family: var(--font-display);
  font-weight: var(--weight-semibold);
  font-size: clamp(16px, 1.8vw, 20px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text);
  margin: 0;
  transition: color 0.2s;
}
.blog-list-item:hover .blog-list-item__title { color: var(--primary); }
.blog-list-item__desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.55;
  margin: 0;
}
.blog-list-item__readtime {
  padding-top: 3px;
  white-space: nowrap;
}

/* ── Filter state ────────────────────────────────────────── */
.is-hidden { display: none !important; }

/* ── Empty state ─────────────────────────────────────────── */
.blog-section { padding: var(--space-20) 0 var(--space-24); }
.blog-empty {
  font-size: var(--text-base);
  color: var(--text-muted);
  font-family: var(--font-mono);
  padding: var(--space-10) 0;
}

/* ── Blog Post Layout ────────────────────────────────────── */
.post-header {
  padding-top: calc(var(--nav-h) + var(--ruler-h) + 72px);
  padding-bottom: 56px;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.post-header .dot-grid-subtle {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.post-header .container { position: relative; z-index: 2; }

.post-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--primary);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-5);
  opacity: 0.7;
}
.post-title {
  font-family: var(--font-display);
  font-weight: var(--weight-extrabold);
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--text);
  margin-bottom: var(--space-5);
  max-width: 760px;
}
.post-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}
.post-date {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}
.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ── Post Hero Image ─────────────────────────────────────── */
.post-hero-image {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  height: 340px;
}
.post-hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(0.9) brightness(0.88);
}

@media (max-width: 600px) {
  .post-hero-image { height: 220px; }
}

/* ── Post Prose Body ─────────────────────────────────────── */
.post-body {
  padding: var(--space-20) 0 var(--space-24);
}
.post-prose {
  max-width: var(--prose-max);
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.75;
}

.post-prose h2 {
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  font-size: clamp(22px, 2.5vw, 28px);
  letter-spacing: -0.015em;
  color: var(--text);
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
  line-height: 1.2;
}
.post-prose h3 {
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  font-size: clamp(18px, 2vw, 22px);
  letter-spacing: -0.01em;
  color: var(--text);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
  line-height: 1.3;
}
.post-prose h4 {
  font-family: var(--font-display);
  font-weight: var(--weight-semibold);
  font-size: var(--text-lg);
  color: var(--text);
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
}

.post-prose p { margin-bottom: var(--space-4); }
.post-prose p:last-child { margin-bottom: 0; }
.post-prose strong { color: var(--text); font-weight: var(--weight-medium); }
.post-prose em { color: var(--text-secondary); font-style: italic; }

.post-prose ul,
.post-prose ol {
  padding-left: 24px;
  margin-bottom: var(--space-4);
}
.post-prose li {
  margin-bottom: var(--space-2);
  line-height: 1.65;
}

.post-prose blockquote {
  border-left: 3px solid var(--primary);
  padding: var(--space-4) var(--space-6);
  margin: var(--space-8) 0;
  background: rgba(1, 158, 219, 0.05);
  border-radius: 0 3px 3px 0;
  font-style: italic;
  color: var(--text-secondary);
}
.post-prose blockquote p { margin-bottom: 0; }

.post-prose code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--surface-raised);
  color: var(--primary);
  padding: 2px 6px;
  border-radius: 2px;
  border: 1px solid var(--border);
}
.post-prose pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: var(--space-6);
  overflow-x: auto;
  margin: var(--space-6) 0;
}
.post-prose pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.6;
}

.post-prose img {
  max-width: 100%;
  width: auto;
  height: auto;
  display: block;
  border-radius: 3px;
  border: 1px solid var(--border);
  margin: var(--space-6) 0;
}
.post-prose hr {
  border: none;
  border-top: 1px dashed var(--border);
  margin: var(--space-12) 0;
}
.post-prose a {
  color: var(--link-color);
  text-decoration-color: var(--link-decoration-color);
}
.post-prose a:hover { color: var(--link-hover-color); }

/* ── Post Footer ─────────────────────────────────────────── */
.post-footer {
  padding: var(--space-8) 0 var(--space-12);
  border-top: 1px dashed var(--border);
  margin-top: var(--space-8);
}
.post-back-link {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: 0.04em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color 0.2s;
}
.post-back-link:hover { color: var(--primary); }
.post-back-link::before { content: '←'; }

/* ── Gear post: product image card treatment ─────────────── */
.post--gear .post-prose img {
  background: #fff;
  padding: 20px;
  max-width: 420px;
  border-color: rgba(255, 255, 255, 0.12);
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 860px) {
  .blog-featured__link {
    flex-direction: column;
    min-height: auto;
  }
  .blog-featured__image {
    width: 100%;
    height: 200px;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .blog-featured__content {
    padding: var(--space-6);
    gap: var(--space-3);
  }
  .blog-featured__title {
    font-size: clamp(22px, 6vw, 32px);
  }
  .blog-featured__desc {
    font-size: 14px;
  }
}

@media (max-width: 640px) {
  .blog-list-item__link {
    grid-template-columns: 1fr;
    gap: var(--space-3);
    padding: var(--space-5) var(--space-4);
  }
  .blog-list-item__readtime { display: none; }
}