/* =========================================================
   SURAJ SHIKSHA — RESOURCE CARDS & CHAPTER GROUPINGS (Scaled +40%)
   - Visual consistency with index.html
   - Chapter Section Blocks
   - Resource Card Component with Open PDF & Download
   - Friendly Suraj Shiksha Empty State
========================================================= */

/* Quick Chapter Jump Filter Bar */
.chapter-filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  padding: 8px 0 20px;
  margin-bottom: 26px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.chapter-filter-bar::-webkit-scrollbar {
  display: none;
}

.chapter-filter-chip {
  padding: 7px 16px;
  font-size: 15px;
  font-weight: 800;
  border-radius: var(--radius-full);
  background: var(--bg-surface);
  border: 1.5px solid var(--border-subtle);
  color: var(--navy-muted);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
  flex: 0 0 auto;
}

.chapter-filter-chip:hover {
  border-color: var(--gold-sun);
  color: var(--navy-deep);
}

.chapter-filter-chip.active {
  background: var(--navy-deep);
  color: #FFFFFF;
  border-color: var(--navy-deep);
}

/* =========================================================
   CHAPTER GROUP SECTION
========================================================= */
.chapter-group-block {
  margin-bottom: 44px;
  background: transparent;
}

.chapter-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  margin-bottom: 22px;
  border-bottom: 2px solid var(--border-light);
  flex-wrap: wrap;
  gap: 12px;
}

.chapter-title-group {
  display: flex;
  align-items: center;
  gap: 14px;
}

.chapter-num-badge {
  font-size: 15px;
  font-weight: 850;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 13px;
  border-radius: var(--radius-full);
  background: #FFF7D6;
  border: 1px solid #FFE58F;
  color: #B45309;
}

.chapter-name-title {
  font-size: 25px;
  font-weight: 900;
  color: var(--navy-deep);
  letter-spacing: -0.01em;
}

.chapter-item-count {
  font-size: 17px;
  font-weight: 750;
  color: var(--navy-muted);
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  padding: 4px 13px;
  border-radius: var(--radius-full);
}

/* =========================================================
   RESOURCE CARDS GRID
========================================================= */
.resource-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.resource-card {
  background: #FFFFFF;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px 22px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  box-sizing: border-box;
}

.resource-card:hover {
  border-color: var(--gold-sun);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(23, 37, 84, 0.1);
}

.card-top-row {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 14px;
}

.card-doc-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: #FFF8E7;
  border: 1.5px solid #FDE68A;
  color: #D97706;
  display: grid;
  place-items: center;
  font-size: 27px;
  flex-shrink: 0;
}

.card-doc-info {
  flex-grow: 1;
  min-width: 0;
}

.card-type-badge {
  font-size: 14.5px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #B45309;
  background: #FEF3C7;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: 6px;
}

.card-doc-title {
  font-size: 21px;
  font-weight: 900;
  color: var(--navy-deep);
  line-height: 1.3;
  margin-bottom: 5px;
  word-break: break-word;
}

.card-doc-meta {
  font-size: 16.5px;
  font-weight: 700;
  color: var(--navy-muted);
}

.card-doc-desc {
  font-size: 17px;
  color: var(--navy-muted);
  line-height: 1.5;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Action Buttons Group */
.card-actions-row {
  display: flex;
  align-items: center;
  gap: 10px;
  border-top: 1px solid var(--border-light);
  padding-top: 14px;
  margin-top: auto;
}

.btn-res-open {
  flex: 1 1 auto;
  padding: 12px 18px;
  background: var(--yellow-brand);
  color: var(--navy-deep);
  border: 1.5px solid var(--gold-sun);
  border-radius: var(--radius-sm);
  font-size: 17px;
  font-weight: 800;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s ease;
  box-shadow: 0 3px 8px var(--gold-glow);
}

.btn-res-open:hover {
  background: var(--gold-sun);
  transform: translateY(-1px);
}

.btn-res-download {
  flex: 0 0 auto;
  padding: 12px 16px;
  background: var(--bg-surface);
  color: var(--navy-deep);
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 800;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: all 0.2s ease;
}

.btn-res-download:hover {
  background: #FFFDF5;
  border-color: var(--gold-sun);
  transform: translateY(-1px);
}

/* =========================================================
   FRIENDLY EMPTY STATE
========================================================= */
.friendly-empty-state {
  text-align: center;
  padding: 60px 30px 50px;
  background: var(--bg-surface);
  border: 2px dashed #E2D9C8;
  border-radius: var(--radius-lg);
  max-width: 600px;
  margin: 30px auto;
}

.empty-state-icon {
  font-size: 48px;
  display: block;
  margin-bottom: 16px;
}

.empty-state-title {
  font-size: 25px;
  font-weight: 900;
  color: var(--navy-deep);
  margin-bottom: 10px;
}

.empty-state-text {
  font-size: 18px;
  color: var(--navy-muted);
  line-height: 1.6;
  margin-bottom: 24px;
}

.btn-empty-action {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--yellow-brand);
  color: var(--navy-deep);
  font-size: 17px;
  font-weight: 800;
  border-radius: var(--radius-full);
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(255, 217, 61, 0.4);
  transition: all 0.2s ease;
}

.btn-empty-action:hover {
  background: var(--gold-sun);
}