/* ═══════════════════════════════════════════════════════════
   AI Systems Landscape 2026 — Index Page Extras
   ═══════════════════════════════════════════════════════════ */

/* ── EBOOK EXPLORE GRID ── */
.ai-explore-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
  margin-top: 8px;
}
.ai-explore-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 24px 20px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.ai-explore-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent3));
  opacity: 0;
  transition: opacity 0.3s;
}
.ai-explore-card:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 32px rgba(201,168,76,0.10);
  transform: translateY(-4px);
}
.ai-explore-card:hover::before { opacity: 1; }
.ai-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.ai-explore-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}
.ai-explore-card p {
  color: var(--text2);
  font-size: 0.88rem;
  line-height: 1.55;
  flex: 1;
}
.ai-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 14px 0 16px;
}
.ai-tag {
  background: var(--surface2);
  color: var(--text2);
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  font-weight: 500;
}
.ai-card-cta {
  color: var(--accent);
  font-weight: 700;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}
.ai-explore-card:hover .ai-card-cta span {
  transform: translateX(4px);
  transition: transform 0.2s;
}
.ai-card-cta span { transition: transform 0.2s; }

/* ── SEARCH FILTER ── */
.ai-search-bar { max-width: 500px; }

/* ── eBook HEADER ENHANCEMENTS ── */
.hero .book-meta {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-top: 16px;
  flex-wrap: wrap;
}
.hero .book-meta span {
  color: var(--text2);
  font-size: 0.82rem;
  display: flex;
  align-items: center;
  gap: 6px;
}
.hero .book-meta .dot { color: var(--accent); }

/* ── STATS COUNTER ── */
.stats-bar { display: flex; gap: 32px; justify-content: center; margin: 24px 0 0; flex-wrap: wrap; }
.stat-item { text-align: center; }
.stat-num { font-size: 1.8rem; font-weight: 800; color: var(--accent); display: block; }
.stat-label { font-size: 0.78rem; color: var(--text2); }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .ai-explore-grid { grid-template-columns: 1fr; }
}