/* ═══════════════════════════════════════════════════════════════
   blog.css — /blog index page
   Loads after: themes.css → base.css → nav.css → footer.css
   Target: 200–350 lines
   ═══════════════════════════════════════════════════════════════ */

/* ── Body offset ── */
body.blog-page {
  padding-top: var(--nav-height);
}

/* ═══ S1 — HERO ═══ */
.blog-hero {
  background: var(--bg-hero);
  padding: var(--space-16) 0 var(--space-12);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.blog-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border-hero) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-hero) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.blog-hero__eyebrow {
  /* color, size, weight, letter-spacing, text-transform inherited from .eyebrow in base.css */
  margin-bottom: var(--space-4);
}

.blog-hero h1 {
  color: var(--text-hero-color);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-5);
}

.blog-hero__sub {
  color: var(--text-hero-dim);
  font-size: var(--text-lg);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ═══ S2 — NEWSLETTER SUBSCRIBE ═══ */
.blog-subscribe {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: var(--space-10) 0;
}

.blog-subscribe__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.blog-subscribe__copy h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.blog-subscribe__copy p {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  margin: 0;
}

.blog-subscribe__form {
  display: flex;
  gap: var(--space-3);
  flex-shrink: 0;
  min-width: 360px;
}

.blog-subscribe__input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-page);
  color: var(--text-primary);
  font-size: var(--text-sm);
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.blog-subscribe__input:focus {
  border-color: var(--dv-orange);
}

.blog-subscribe__input::placeholder {
  color: var(--text-muted);
}

.blog-subscribe__confirm {
  display: none;
  color: var(--dv-teal);
  font-size: var(--text-sm);
  font-weight: 600;
  align-items: center;
  gap: var(--space-2);
}

.blog-subscribe__confirm.is-visible {
  display: flex;
}

/* ═══ S3 — CATEGORY FILTER TABS ═══ */
.blog-filters {
  padding: var(--space-8) 0 var(--space-4);
  border-bottom: 1px solid var(--border);
}

.blog-filters__tabs {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.blog-filter-tab {
  padding: var(--space-2) var(--space-5);
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.18s;
}

.blog-filter-tab:hover {
  border-color: var(--dv-orange);
  color: var(--dv-orange);
}

.blog-filter-tab.is-active {
  background: var(--dv-orange);
  border-color: var(--dv-orange);
  color: var(--text-hero-color);
}

/* ═══ S4 — POST GRID ═══ */
.blog-posts {
  padding: var(--space-10) 0 var(--space-16);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

/* Post card */
.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.blog-card:hover {
  border-color: var(--dv-orange);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.blog-card__image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-surface);
}

.blog-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.blog-card__image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-surface);
}

.blog-card__body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.blog-card__pill {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
  background: var(--dv-orange-dim);
  color: var(--dv-orange);
}

.blog-card__pill--teal {
  background: var(--dv-teal-dim);
  color: var(--dv-teal);
}

.blog-card__title {
  font-size: var(--text-base);
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card__excerpt {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--space-4);
  flex: 1;
}

.blog-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: auto;
}

.blog-card__meta-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
}

/* Empty / loading states */
.blog-grid__empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-16) 0;
  color: var(--text-muted);
}

.blog-grid__empty p {
  font-size: var(--text-sm);
  margin-top: var(--space-3);
}

.blog-card--skeleton .blog-card__image {
  background: var(--bg-surface);
  animation: skeleton-pulse 1.4s ease-in-out infinite;
}

.blog-card--skeleton .blog-card__title,
.blog-card--skeleton .blog-card__excerpt,
.blog-card--skeleton .blog-card__meta {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  color: transparent;
  animation: skeleton-pulse 1.4s ease-in-out infinite;
}

@keyframes skeleton-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ═══ S5 — CLUSTER NAVIGATION ═══ */
.blog-clusters {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: var(--space-12) 0;
}

.blog-clusters__header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.blog-clusters__header h2 {
  font-size: var(--text-2xl);
  font-weight: 700;
}

.blog-clusters__header p {
  color: var(--text-secondary);
  margin-top: var(--space-2);
}

.blog-cluster-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.blog-cluster-link {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, background 0.2s;
}

.blog-cluster-link:hover {
  border-color: var(--dv-teal);
  background: var(--bg-card);
}

.blog-cluster-link__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dv-teal);
}

.blog-cluster-link__title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
}

.blog-cluster-link__arrow {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: auto;
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 1024px) {
  .blog-grid { grid-template-columns: repeat(2, 1fr); }
  .blog-cluster-grid { grid-template-columns: repeat(2, 1fr); }
  .blog-subscribe__inner { flex-direction: column; align-items: flex-start; }
  .blog-subscribe__form { min-width: 0; width: 100%; }
}

@media (max-width: 640px) {
  .blog-grid { grid-template-columns: 1fr; }
  .blog-cluster-grid { grid-template-columns: 1fr 1fr; }
  .blog-hero { padding: var(--space-12) 0 var(--space-8); }
}