/* ==========================================================================
   LIBRARY.CSS — Ultra-Premium Pages Publiques Bibliothèque v2
   home · catalogue · book
   ========================================================================== */

body {
  background: linear-gradient(145deg, #EEF2F8 0%, #E8ECF5 100%);
  background-attachment: fixed;
}

/* --------------------------------------------------------------------------
   NAV PUBLIQUE BIBLIOTHÈQUE — Glass frosted
   -------------------------------------------------------------------------- */
#library-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 28px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  border-bottom: 1px solid rgba(255,255,255,0.50);
  box-shadow: 0 1px 0 rgba(255,255,255,0.5), 0 4px 20px rgba(0,0,0,0.05);
  transition: background 400ms ease, box-shadow 400ms ease;
}

#library-nav.transparent {
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: none;
  box-shadow: none;
}

#library-nav.scrolled {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(24px) saturate(2.0);
  -webkit-backdrop-filter: blur(24px) saturate(2.0);
  box-shadow: 0 4px 24px rgba(0,0,0,0.07);
  border-bottom: 1px solid rgba(255,255,255,0.50);
}

#library-nav.transparent .nav-logo,
#library-nav.transparent .nav-link,
#library-nav.transparent .nav-lib-name { color: #fff; }

#library-nav.scrolled .nav-logo,
#library-nav.scrolled .nav-link,
#library-nav.scrolled .nav-lib-name { color: var(--color-gray-700); }

.nav-lib-name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* --------------------------------------------------------------------------
   PAGE PUBLIQUE BIBLIOTHÈQUE (home.html) — Hero premium
   -------------------------------------------------------------------------- */
.lib-home-hero {
  padding-top: 68px;
  min-height: 340px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}

.lib-home-cover {
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, #0A0F1E, #1D3461 50%, #2A4B8A);
}
.lib-home-cover img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.30;
}
/* Gradient overlay bottom */
.lib-home-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(10,15,30,0.20) 0%, rgba(10,15,30,0.65) 100%);
}

/* Ambient blobs inside hero */
.lib-home-hero .blob-container { z-index: 0; }

.lib-home-header {
  position: relative;
  z-index: 2;
  padding: 36px 36px 28px;
  display: flex;
  align-items: flex-end;
  gap: 20px;
  width: 100%;
}

.lib-home-logo {
  width: 88px; height: 88px;
  border-radius: 20px;
  border: 3px solid rgba(255,255,255,0.70);
  background: rgba(255,255,255,0.90);
  backdrop-filter: blur(12px);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
  box-shadow: 0 8px 32px rgba(0,0,0,0.20), 0 0 0 1px rgba(255,255,255,0.30);
}

.lib-home-name {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
  text-shadow: 0 2px 12px rgba(0,0,0,0.30);
}
.lib-home-type {
  font-size: 14px;
  color: rgba(255,255,255,0.70);
}

/* --------------------------------------------------------------------------
   ONGLETS — Animated gradient underline
   -------------------------------------------------------------------------- */
.lib-tabs {
  background: rgba(255,255,255,0.90);
  backdrop-filter: blur(20px) saturate(1.6);
  -webkit-backdrop-filter: blur(20px) saturate(1.6);
  border-bottom: 1px solid rgba(29,52,97,0.08);
  display: flex;
  align-items: center;
  padding: 0 32px;
  gap: 4px;
  position: sticky;
  top: 68px;
  z-index: 50;
  box-shadow: 0 4px 16px rgba(0,0,0,0.04);
}

.lib-tab-btn {
  padding: 16px 18px;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-gray-400);
  border: none;
  background: none;
  cursor: pointer;
  border-bottom: 2.5px solid transparent;
  margin-bottom: -1px;
  transition: color var(--t-fast), border-color var(--t-normal);
  position: relative;
}
.lib-tab-btn:hover { color: var(--color-gray-700); }
.lib-tab-btn.active {
  color: var(--color-primary);
  font-weight: 600;
  border-bottom-color: transparent;
}
/* Animated underline on active tab */
.lib-tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 2.5px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-teal));
  border-radius: 9999px;
  box-shadow: 0 0 8px rgba(29,52,97,0.25);
}

.lib-tab-panel { display: none; }
.lib-tab-panel.active { display: block; animation: fadeInUp 0.25s ease both; }

/* --------------------------------------------------------------------------
   CATALOGUE PUBLIC — Topbar frosted
   -------------------------------------------------------------------------- */
.catalog-topbar {
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  border-bottom: 1px solid rgba(255,255,255,0.50);
  padding: 16px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  box-shadow: 0 2px 16px rgba(0,0,0,0.04);
  position: sticky;
  top: 68px;
  z-index: 40;
}

.catalog-search {
  flex: 1;
  min-width: 200px;
  max-width: 380px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.80);
  backdrop-filter: blur(8px);
  border: 1.5px solid rgba(29,52,97,0.15);
  border-radius: 9999px;
  padding: 10px 18px;
  transition: border-color var(--t-fast), box-shadow var(--t-fast), background var(--t-fast);
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.catalog-search:focus-within {
  border-color: var(--color-primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(29,52,97,0.08), 0 4px 16px rgba(29,52,97,0.06);
}
.catalog-search input {
  border: none;
  background: none;
  font-family: var(--font-ui);
  font-size: 14px;
  flex: 1;
  outline: none;
  color: var(--color-gray-700);
}

/* Filter chips — glass pills */
.catalog-filters {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.filter-chip {
  padding: 8px 16px;
  border-radius: 9999px;
  border: 1.5px solid rgba(29,52,97,0.15);
  font-size: 13px;
  font-family: var(--font-ui);
  font-weight: 500;
  color: var(--color-gray-600);
  background: rgba(255,255,255,0.72);
  backdrop-filter: blur(8px);
  cursor: pointer;
  transition: all var(--t-spring);
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.filter-chip:hover {
  border-color: rgba(29,52,97,0.28);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(29,52,97,0.08);
}
.filter-chip.active {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(29,52,97,0.08);
  font-weight: 600;
  box-shadow: 0 0 0 3px rgba(29,52,97,0.08);
  transform: translateY(-1px);
}

/* --------------------------------------------------------------------------
   BOOKS GRID — Glass cards 3D hover
   -------------------------------------------------------------------------- */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
  padding: 28px 20px;
  width: calc(100% - 32px);
  max-width: 1240px;
  margin: 0 auto;
}

.book-card {
  background: rgba(255,255,255,0.82);
  backdrop-filter: blur(16px) saturate(1.6);
  -webkit-backdrop-filter: blur(16px) saturate(1.6);
  border: 1px solid rgba(255,255,255,0.60);
  border-radius: 20px;
  overflow: hidden;
  transition: transform 400ms var(--ease-spring), box-shadow 400ms var(--ease-smooth);
  display: flex;
  flex-direction: column;
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
  position: relative;
}
.book-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(29,52,97,0.03), transparent 50%);
  pointer-events: none;
  z-index: 1;
}
.book-card:hover {
  transform: translateY(-10px) scale(1.02) perspective(600px) rotateX(1.5deg);
  box-shadow: 0 28px 60px rgba(0,0,0,0.14), 0 0 0 1px rgba(29,52,97,0.10);
}
.book-card:hover .book-cover {
  transform: scale(1.05);
}

.book-cover {
  width: 100%;
  height: 190px;
  object-fit: cover;
  background: linear-gradient(135deg, #E8ECF5, #DDE3EF);
  transition: transform 400ms var(--ease-smooth);
  position: relative;
  z-index: 0;
}

/* Cover overlay gradient */
.book-cover-wrap {
  position: relative;
  overflow: hidden;
  height: 190px;
}
.book-cover-wrap::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 60%;
  background: linear-gradient(to top, rgba(10,15,30,0.25), transparent);
  pointer-events: none;
  z-index: 2;
}

.book-info {
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 2;
}
.book-title {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: 4px;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.book-author {
  font-size: 12px;
  color: var(--color-gray-400);
  margin-bottom: 12px;
}
.book-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

@media (max-width: 480px) {
  .books-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; padding: 14px; }
}

/* --------------------------------------------------------------------------
   PAGE LIVRE (book.html)
   -------------------------------------------------------------------------- */
.book-detail-wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 40px 24px;
  padding-top: calc(68px + 40px);
}

.book-detail-glass {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px) saturate(1.6);
  -webkit-backdrop-filter: blur(20px) saturate(1.6);
  border: 1px solid rgba(255,255,255,0.60);
  border-radius: 24px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.08);
  overflow: hidden;
}

.book-detail-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  align-items: start;
  padding: 36px;
}

.book-detail-cover {
  width: 220px;
  aspect-ratio: 3/4;
  border-radius: 16px;
  object-fit: cover;
  box-shadow: 0 16px 48px rgba(0,0,0,0.18), 0 0 0 1px rgba(255,255,255,0.4);
  background: linear-gradient(135deg, #E8ECF5, #DDE3EF);
}

.book-detail-title {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.book-detail-author {
  font-size: 16px;
  color: var(--color-gray-600);
  margin-bottom: 20px;
}

.book-meta-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 28px;
}
.book-meta-item {
  background: rgba(29,52,97,0.04);
  border: 1px solid rgba(29,52,97,0.08);
  border-radius: 12px;
  padding: 14px 16px;
  transition: background var(--t-fast);
}
.book-meta-item:hover {
  background: rgba(29,52,97,0.07);
}
.book-meta-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  color: var(--color-gray-400);
  margin-bottom: 4px;
}
.book-meta-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-gray-700);
}

@media (max-width: 640px) {
  .book-detail-grid { grid-template-columns: 1fr; padding: 24px; }
  .book-detail-cover { width: 150px; margin: 0 auto; }
}

/* --------------------------------------------------------------------------
   BREADCRUMB
   -------------------------------------------------------------------------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--color-gray-400);
  padding: 16px 24px 0;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--color-primary); font-weight: 500; transition: color var(--t-fast); }
.breadcrumb a:hover { color: var(--color-primary-light); text-decoration: underline; }
.breadcrumb-sep { color: var(--color-gray-300); }

/* --------------------------------------------------------------------------
   POWERED BY BIBLOSPACE
   -------------------------------------------------------------------------- */
.powered-by {
  text-align: center;
  padding: 20px;
  font-size: 12px;
  color: var(--color-gray-400);
  background: rgba(255,255,255,0.60);
  backdrop-filter: blur(8px);
  border-top: 1px solid rgba(29,52,97,0.06);
}
.powered-by a {
  color: var(--color-primary);
  font-weight: 600;
  transition: color var(--t-fast);
}
.powered-by a:hover { color: var(--color-primary-light); }

/* --------------------------------------------------------------------------
   PLATFORM FOOTER PRO (shared — appears on library pages too)
   -------------------------------------------------------------------------- */
.platform-footer-pro {
  background: linear-gradient(160deg, #07111f 0%, #0d1a2e 60%, #081420 100%);
  border-top: 1px solid rgba(255,255,255,0.07);
  padding: 60px 0 0;
  font-family: var(--font-ui);
  color: rgba(255,255,255,0.7);
  position: relative;
}
.footer-pro-top {
  width: calc(100% - 32px);
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px 48px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
}
.footer-col-brand .footer-brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: #fff;
  margin-bottom: 14px;
}
.footer-brand-tagline {
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(255,255,255,0.55);
  margin-bottom: 22px;
  max-width: 280px;
}
.footer-socials { display: flex; gap: 8px; }
.footer-social-btn {
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 9px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.10);
  color: rgba(255,255,255,0.65);
  transition: background 200ms, color 200ms, transform 200ms;
  text-decoration: none;
}
.footer-social-btn:hover {
  background: rgba(201,123,44,0.20);
  color: #C97B2C;
  transform: translateY(-2px);
}
.footer-col-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.40);
  margin-bottom: 16px;
}
.footer-col-links { list-style: none; padding: 0; margin: 0 0 20px; display: flex; flex-direction: column; gap: 10px; }
.footer-link-pro {
  font-size: 13.5px;
  color: rgba(255,255,255,0.60);
  text-decoration: none;
  transition: color 180ms;
}
.footer-link-pro:hover { color: #fff; }
.footer-trust-badges { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.footer-badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 11px; font-weight: 600;
  color: rgba(255,255,255,0.50);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 6px;
  padding: 4px 9px;
}
.footer-pro-bottom {
  border-top: 1px solid rgba(255,255,255,0.07);
  width: calc(100% - 32px);
  max-width: 1240px;
  margin: 0 auto;
  padding: 20px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copyright { font-size: 12.5px; color: rgba(255,255,255,0.35); }
.footer-legal-links { display: flex; gap: 20px; }
@media (max-width: 900px) {
  .footer-pro-top { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 560px) {
  .footer-pro-top { grid-template-columns: 1fr; gap: 24px; padding: 0 20px 36px; }
  .footer-pro-bottom { flex-direction: column; align-items: flex-start; padding: 16px 20px; }
  .footer-legal-links { flex-wrap: wrap; gap: 12px; }
}