/* ==========================================================================
   HUB.CSS - Dedykowany arkusz stylów dla katalogów i hubów (Articles, Books)
   ========================================================================== */

/* 1. BREADCRUMBS */
.breadcrumbs {
  margin-bottom: 24px;
  font-size: 14px;
}

.breadcrumbs ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  color: var(--color-text-muted);
}

.breadcrumbs a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
}

.breadcrumbs a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.breadcrumbs .separator {
  color: #cbd5e1;
  user-select: none;
  font-size: 12px;
}

.breadcrumbs .current {
  color: var(--color-text-main);
  font-weight: 600;
}

/* 2. KARTA NAGŁÓWKA HUBA */
.hub-header-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 40px 48px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02);
  margin-bottom: 35px;
}

.hub-badge {
  display: inline-block;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.hub-header-card h1 {
  font-size: 34px;
  font-weight: 800;
  color: var(--color-text-main);
  letter-spacing: -0.6px;
  line-height: 1.25;
  margin-bottom: 12px;
}

.hub-subtitle {
  font-size: 16px;
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 780px;
  margin-bottom: 20px;
}

/* Metryki huba (liczba wpisów i data aktualizacji) */
.hub-meta-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 14px;
  color: #64748b;
  padding-bottom: 20px;
  border-bottom: 1px solid #f1f5f9;
}

.hub-count-tag strong {
  color: var(--color-primary);
  font-size: 16px;
  font-weight: 800;
}

/* 3. PRZYCISKI FILTROWANIA (CURRICULUM FILTER) */
.hub-filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.hub-filter-btn {
  background: #f1f5f9;
  border: 1px solid var(--color-border);
  color: #475569;
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  padding: 7px 16px;
  border-radius: 20px;
  cursor: pointer;
  transition: all var(--transition);
  outline: none;
}

.hub-filter-btn:hover {
  background: #e2e8f0;
  color: var(--color-text-main);
}

.hub-filter-btn.is-active {
  background: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.25);
}

/* 4. SIATKA ARTYKUŁÓW (CARDS GRID) */
.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
  margin-bottom: 50px;
}

.hub-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  overflow: hidden;
}

.hub-card:hover {
  transform: translateY(-4px);
  border-color: #c7d2fe;
  box-shadow: 0 10px 24px rgba(79, 70, 229, 0.08);
}

.hub-card-body {
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.hub-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  font-size: 13px;
}

.hub-card-badge {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 3px 10px;
  border-radius: 14px;
  background: #f1f5f9;
  color: #475569;
}

.hub-card-badge.exam-type-badge {
  background: #ede9fe;
  color: #6d28d9;
}

.hub-card-date {
  color: #94a3b8;
  font-size: 12px;
}

.hub-card-title {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  margin: 0 0 10px 0;
  color: var(--color-text-main);
}

.hub-card-title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

.hub-card-title a:hover {
  color: var(--color-primary);
}

.hub-card-desc {
  font-size: 14px;
  color: #64748b;
  line-height: 1.6;
  margin-bottom: 22px;
  flex-grow: 1;
}

.hub-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid #f8fafc;
  margin-top: auto;
}

.hub-card-author {
  font-size: 13px;
  color: #94a3b8;
  font-weight: 500;
}

.hub-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-primary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: gap var(--transition);
}

.hub-card-link:hover {
  gap: 10px;
  color: var(--color-primary-hover);
}

.hub-card-link .icon {
  font-size: 11px;
}

/* 5. SEKCJA "EXPLORE OTHER HUBS" */
.see-also-section {
  margin-top: 40px;
  margin-bottom: 30px;
}

.see-also-heading {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 20px;
}

.see-also-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.see-also-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-decoration: none;
  color: var(--color-text-main);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.see-also-box:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary);
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.08);
}

.see-also-info h3 {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 4px 0;
  color: var(--color-text-main);
}

.see-also-info p {
  font-size: 13px;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.4;
}

.see-also-box .icon {
  color: #cbd5e1;
  font-size: 14px;
  transition: transform var(--transition), color var(--transition);
  flex-shrink: 0;
  margin-left: 14px;
}

.see-also-box:hover .icon {
  color: var(--color-primary);
  transform: translateX(4px);
}

/* 6. RESPONSYWNOŚĆ */
@media (max-width: 900px) {
  .hub-header-card {
    padding: 30px 24px;
  }

  .hub-header-card h1 {
    font-size: 28px;
  }
}

@media (max-width: 600px) {
  .breadcrumbs {
    margin-bottom: 16px;
    font-size: 13px;
  }

  .hub-header-card {
    padding: 24px 18px;
    border-radius: 12px;
  }

  .hub-header-card h1 {
    font-size: 23px;
  }

  .hub-subtitle {
    font-size: 14px;
  }

  .hub-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .hub-card-body {
    padding: 20px 18px;
  }
}

/* ==========================================================================
   4.1 DEDYKOWANE STYLE DLA KART AUTORÓW (HUB AUTHORS)
   ========================================================================== */
.hub-card-author-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.hub-card-author-avatar {
  width: 72px;
  height: 72px;
  aspect-ratio: 1 / 1;
  border-radius: 14px;
  object-fit: cover;
  border: 1px solid var(--color-border);
  background-color: #f1f5f9;
  flex-shrink: 0;
  transition: transform var(--transition), border-color var(--transition);
}

.hub-card:hover .hub-card-author-avatar {
  border-color: var(--color-primary);
  transform: scale(1.03);
}

.hub-card-author-info {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.hub-card-author-info .hub-card-badge {
  align-self: flex-start;
}

.hub-card-author-info .hub-card-title {
  margin: 0;
}

/* ==========================================================================
   4.3 DEDYKOWANE STYLE DLA KATALOGU KSIĄŻEK (HUB BOOKS)
   ========================================================================== */

/* Pasek dodatkowych filtrów cech (All / Analysis / Quiz) */
.hub-subfilter-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed #e2e8f0;
}

.subfilter-label {
  font-size: 13px;
  font-weight: 700;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.subfilter-chip {
  background: #ffffff;
  border: 1px solid var(--color-border);
  color: #475569;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 14px;
  cursor: pointer;
  transition: all var(--transition);
}

.subfilter-chip:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
  color: var(--color-text-main);
}

.subfilter-chip.is-active {
  background: #ede9fe;
  color: #6d28d9;
  border-color: #c4b5fd;
  box-shadow: 0 1px 4px rgba(109, 40, 217, 0.12);
}

/* Kontener listy lektur (nowoczesna lista kart horyzontalnych) */
.hub-books-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 50px;
}

/* Karta pojedynczej książki */
.hub-book-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 22px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
}

.hub-book-card:hover {
  transform: translateY(-2px);
  border-color: #c7d2fe;
  box-shadow: 0 8px 20px rgba(79, 70, 229, 0.06);
}

/* Lewa część karty: Informacje o książce */
.hub-book-main {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  min-width: 0;
}

/* Pigułki metadanych */
.hub-book-badges {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.hub-book-badge {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  padding: 2px 8px;
  border-radius: 6px;
  line-height: 1.4;
}

.hub-book-badge.epoch-badge {
  background: #f1f5f9;
  color: #475569;
}

.hub-book-badge.exam-badge {
  background: #ede9fe;
  color: #6d28d9;
}

/* Tytuł książki */
.hub-book-title {
  font-size: 20px;
  font-weight: 700;
  margin: 0;
  line-height: 1.3;
}

.hub-book-title a {
  color: var(--color-text-main);
  text-decoration: none;
  transition: color var(--transition);
}

.hub-book-title a:hover {
  color: var(--color-primary);
}

/* Linia autora */
.hub-book-author-line {
  font-size: 14px;
  color: var(--color-text-muted);
  font-weight: 500;
}

.hub-book-author-link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
  transition: text-decoration var(--transition), color var(--transition);
}

.hub-book-author-link:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

.hub-book-author-plain {
  color: var(--color-text-main);
  font-weight: 600;
}

.hub-book-desc {
  font-size: 13px;
  color: #64748b;
  margin: 4px 0 0 0;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Prawa część karty: Przyciski akcji (Overview, Analysis, Quiz) */
.hub-book-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  flex-wrap: wrap;
}

.hub-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
  white-space: nowrap;
}

/* Przycisk Overview (Główna baza lektury) */
.hub-action-btn.action-overview {
  background: #f1f5f9;
  color: #1e293b;
  border: 1px solid var(--color-border);
}

.hub-action-btn.action-overview:hover {
  background: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.hub-action-btn.action-overview .icon {
  font-size: 11px;
  transition: transform var(--transition);
}

.hub-action-btn.action-overview:hover .icon {
  transform: translateX(3px);
}

/* Przycisk Analizy (Analysis) */
.hub-action-btn.action-analysis {
  background: #f0fdf4;
  color: #15803d;
  border: 1px solid #bbf7d0;
}

.hub-action-btn.action-analysis:hover {
  background: #16a34a;
  color: #ffffff;
  border-color: #16a34a;
}

/* Przycisk Quizu (Quiz) */
.hub-action-btn.action-quiz {
  background: #f5f3ff;
  color: #7c3aed;
  border: 1px solid #ddd6fe;
}

.hub-action-btn.action-quiz:hover {
  background: #7c3aed;
  color: #ffffff;
  border-color: #7c3aed;
}

.hub-action-btn .action-bullet {
  font-size: 10px;
  line-height: 1;
}

/* ==========================================================================
   RESPONSYWNOŚĆ DLA KART KSIĄŻEK (MOBILE)
   ========================================================================== */
@media (max-width: 768px) {
  .hub-book-card {
    flex-direction: column;
    align-items: flex-start;
    padding: 18px 20px;
    gap: 16px;
  }

  .hub-book-actions {
    width: 100%;
    padding-top: 14px;
    border-top: 1px solid #f1f5f9;
    justify-content: flex-start;
  }

  .hub-action-btn {
    flex: 1;
    justify-content: center;
    padding: 7px 12px;
    font-size: 12px;
  }
}

/* W hub.css pod sekcją .hub-action-btn */
.hub-action-btn .icon {
  font-size: 12px;
}

.hub-action-btn.action-overview .icon {
  font-size: 11px;
  transition: transform var(--transition);
}

.hub-action-btn.action-overview:hover .icon {
  transform: translateX(3px);
}