/* ─── Blog index: featured-hero + tag-chip rail + chronological feed (blog.html) ─── */

.blog-index-header {
  padding: 180px 0 56px;
}
.blog-index-title {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
  color: var(--fg-primary);
  max-width: 760px;
}
.blog-index-lede {
  font-size: 17px;
  line-height: 1.6;
  color: var(--fg-secondary);
  max-width: 620px;
}

/* Featured post — title-led wide card */
.blog-feature-section {
  position: relative;
  z-index: 1;
  padding: 0 0 80px;
}
.blog-hero-feature {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 48px 52px;
  background: var(--ink-700);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  box-shadow: var(--shadow-md);
  transition: border-color 220ms var(--ease-out-quint), transform 220ms var(--ease-out-quint);
}
.blog-hero-feature::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 18px;
  pointer-events: none;
  background: radial-gradient(120% 80% at 100% 0%, rgba(255, 92, 60, 0.10) 0%, transparent 55%);
  opacity: 0.9;
}
.blog-hero-feature:hover {
  border-color: rgba(255, 255, 255, 0.16);
}
.blog-hero-feature > * { position: relative; z-index: 1; }
.bhf-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.bhf-date {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--fg-tertiary);
  text-transform: uppercase;
}
.bhf-title {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.025em;
  max-width: 820px;
}
.bhf-title a {
  color: var(--fg-primary);
  transition: color 200ms var(--ease-out-quint);
}
.bhf-title a:hover { color: var(--ember-300); }
.bhf-excerpt {
  font-size: 16px;
  line-height: 1.65;
  color: var(--fg-secondary);
  max-width: 760px;
}
.bhf-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 8px;
  padding-top: 22px;
  border-top: 1px solid var(--border-soft);
}
.bhf-byline {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-tertiary);
}
.bhf-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ember-300);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms var(--ease-out-quint);
}
.bhf-link:hover { border-bottom-color: var(--ember-300); }

/* Tag chip — mono uppercase pill */
.tag-chip {
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  border-radius: var(--radius-pill, 999px);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ember-300);
  background: rgba(255, 92, 60, 0.10);
  border: 1px solid rgba(255, 92, 60, 0.22);
  line-height: 1;
  white-space: nowrap;
}
.tag-chip-ghost {
  color: var(--fg-tertiary);
  background: transparent;
  border-color: var(--border-soft);
}

/* Tag filter rail */
.blog-tags-section {
  position: relative;
  z-index: 1;
  padding: 0 0 48px;
}
.tag-chip-rail {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 18px 0;
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
}
.tag-chip-filter {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border-radius: var(--radius-pill, 999px);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-secondary);
  background: transparent;
  border: 1px solid var(--border-soft);
  cursor: pointer;
  transition: color 200ms var(--ease-out-quint), border-color 200ms, background-color 200ms;
}
.tag-chip-filter:hover {
  color: var(--fg-primary);
  border-color: rgba(255, 255, 255, 0.22);
}
.tag-chip-filter.is-active {
  color: var(--fg-primary);
  background: rgba(255, 92, 60, 0.14);
  border-color: rgba(255, 92, 60, 0.36);
}

/* Chronological feed — hairline-divided 3-col grid */
.blog-feed-section {
  position: relative;
  z-index: 1;
  padding: 0 0 96px;
}
.blog-feed {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background-color: var(--border-soft);
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
}
.blog-feed-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 32px 28px;
  background: var(--ink-700);
  color: var(--fg-primary);
  transition: background-color 220ms var(--ease-out-quint);
  min-height: 280px;
}
.blog-feed-card:hover { background-color: rgba(255, 255, 255, 0.02); }
.blog-feed-card:hover .bfc-title { color: var(--ember-300); }
.bfc-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.bfc-title {
  font-size: 19px;
  font-weight: 700;
  line-height: 1.32;
  letter-spacing: -0.018em;
  color: var(--fg-primary);
  transition: color 200ms var(--ease-out-quint);
}
.bfc-excerpt {
  font-size: 14px;
  line-height: 1.6;
  color: var(--fg-secondary);
  flex: 1;
}
.bfc-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--border-soft);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-tertiary);
}

/* Newsletter "Stay in the loop" — restyled with warm-tech tokens */
.newsletter-section {
  padding: 48px 0 64px;
}
.newsletter-card {
  max-width: 720px;
  margin: 0 auto;
  padding: 56px 44px;
  text-align: center;
  background: var(--ink-700);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  box-shadow: var(--shadow-md);
}
.newsletter-card .eyebrow { margin-bottom: 18px; }
.newsletter-title {
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin-bottom: 14px;
  color: var(--fg-primary);
}
.newsletter-desc {
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--fg-secondary);
  max-width: 520px;
  margin: 0 auto 28px;
}
.newsletter-cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 22px;
}
.newsletter-note {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-tertiary);
}