/* ================================================================
   KDV A-Z Listing Page Styles
   Design ref: a-z-animals.com (sticky nav + text-list)
   ================================================================ */

:root {
  --kdv-green:   #2e7d32;
  --kdv-green-l: #e8f5e9;
  --kdv-bg:      #FAFAF7;
  --kdv-text:    #1a1a1a;
  --kdv-muted:   #666;
  --kdv-border:  #e0e0e0;
  --kdv-radius:  6px;
}

.kdv-az-page {
  background: var(--kdv-bg);
  min-height: 100vh;
}

/* ----------------------------------------------------------------
   HERO
   ---------------------------------------------------------------- */
.kdv-az-hero {
  background: var(--kdv-green);
  color: #fff;
  padding: 48px 0 40px;
  text-align: center;
}

.kdv-az-hero-title {
  font-size: 2rem;
  font-weight: 800;
  margin: 0 0 12px;
  line-height: 1.2;
  color: #fff;
}

.kdv-az-hero-tagline {
  font-size: 1rem;
  opacity: 0.88;
  margin: 0 auto 28px;
  max-width: 520px;
  line-height: 1.5;
}

.kdv-az-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
}

.kdv-az-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.kdv-az-stat-number {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
}

.kdv-az-stat-label {
  font-size: 0.8rem;
  opacity: 0.8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ----------------------------------------------------------------
   ALPHABET NAV
   ---------------------------------------------------------------- */
.kdv-az-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 2px solid var(--kdv-green);
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.kdv-az-nav-inner {
  display: flex;
  gap: 4px;
  padding: 10px 16px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  max-width: 1200px;
  margin: 0 auto;
}

.kdv-az-nav-inner::-webkit-scrollbar {
  display: none;
}

.kdv-az-nav-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 8px;
  border-radius: var(--kdv-radius);
  background: var(--kdv-green-l);
  color: var(--kdv-green);
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.kdv-az-nav-btn:hover,
.kdv-az-nav-btn.is-active {
  background: var(--kdv-green);
  color: #fff;
  text-decoration: none;
}

/* ----------------------------------------------------------------
   CONTENT AREA
   ---------------------------------------------------------------- */
.kdv-az-content {
  padding: 32px 0 64px;
}

/* ----------------------------------------------------------------
   LETTER SECTION
   ---------------------------------------------------------------- */
.kdv-az-letter-section {
  margin-bottom: 40px;
  scroll-margin-top: 72px; /* offset for sticky nav */
}

.kdv-az-letter-heading {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--kdv-green);
}

.kdv-az-letter-char {
  font-size: 2rem;
  font-weight: 900;
  color: var(--kdv-green);
  line-height: 1;
}

.kdv-az-letter-count {
  font-size: 0.82rem;
  color: var(--kdv-muted);
  font-weight: 400;
}

/* ----------------------------------------------------------------
   CARD GRID
   .kdv-related-card styles live in style.css — chỉ thêm grid wrapper
   ---------------------------------------------------------------- */
.kdv-az-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

/* ----------------------------------------------------------------
   TEXT FALLBACK — loài không có featured image
   ---------------------------------------------------------------- */
.kdv-az-text-list {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px 16px;
}

.kdv-az-text-item {
  border-bottom: 1px solid var(--kdv-border);
}

.kdv-az-text-item a {
  display: block;
  padding: 7px 4px;
  color: var(--kdv-text);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 0.12s;
}

.kdv-az-text-item a:hover {
  color: var(--kdv-green);
}

/* ----------------------------------------------------------------
   CONTAINER (reuse homepage pattern)
   ---------------------------------------------------------------- */
.kdv-az-page .kdv-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ----------------------------------------------------------------
   RESPONSIVE — Mobile ≤ 767px
   ---------------------------------------------------------------- */
@media (max-width: 767px) {
  .kdv-az-hero {
    padding: 32px 0 28px;
  }

  .kdv-az-hero-title {
    font-size: 1.4rem;
  }

  .kdv-az-hero-tagline {
    font-size: 0.88rem;
    margin-bottom: 20px;
  }

  .kdv-az-stats {
    gap: 24px;
  }

  .kdv-az-stat-number {
    font-size: 1.5rem;
  }

  .kdv-az-card-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .kdv-az-text-list {
    grid-template-columns: 1fr;
  }

  .kdv-az-letter-char {
    font-size: 1.6rem;
  }
}

/* ----------------------------------------------------------------
   RESPONSIVE — Tablet ≥768
   ---------------------------------------------------------------- */
@media (min-width: 768px) {
  .kdv-az-card-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .kdv-az-text-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ----------------------------------------------------------------
   RESPONSIVE — Desktop ≥1024
   ---------------------------------------------------------------- */
@media (min-width: 1024px) {
  .kdv-az-card-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .kdv-az-text-list {
    grid-template-columns: repeat(4, 1fr);
  }
}