/*
 * Physics SciEd Student Library
 * Library browsing and book reader theme v1.0
 */

/* =========================================================
   Library directory
   ========================================================= */

body.psc-library-page {
  background: var(--student-cream) !important;
}

.library-page-shell {
  width: min(1400px, 100%);
  margin-inline: auto;
  padding: 18px clamp(12px, 2vw, 22px) 54px;
  flex: 1 0 auto;
}

.library-intro-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 330px);
  align-items: center;
  gap: 20px;
  margin-bottom: 14px;
  padding: 22px 24px;
  background: white;
  border: 1px solid var(--student-border);
  border-radius: 22px;
}

.library-intro-copy {
  min-width: 0;
}

.library-page-kicker {
  width: fit-content;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
  padding: 0.32rem 0.64rem;
  color: var(--student-navy);
  background: var(--student-soft);
  border: 1px solid var(--student-border);
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.055em;
}

.library-intro-panel h1 {
  margin: 0 0 7px;
  color: var(--student-navy) !important;
  font-family: "Libre Baskerville", Georgia, serif !important;
  font-size: clamp(1.7rem, 3vw, 2.4rem) !important;
  font-weight: 700 !important;
  line-height: 1.12;
  letter-spacing: -0.035em;
}

.library-intro-panel p {
  max-width: 820px;
  margin: 0;
  color: var(--student-muted) !important;
  font-size: 0.88rem;
  line-height: 1.62;
}

.library-stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.library-stat-card {
  min-width: 0;
  display: grid;
  gap: 2px;
  padding: 13px;
  background: #fffdf6;
  border: 1px solid var(--student-border);
  border-radius: 16px;
}

.library-stat-icon {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  margin-bottom: 6px;
  color: var(--student-navy);
  background: var(--student-soft);
  border: 1px solid var(--student-border);
  border-radius: 11px;
}

.library-stat-value {
  color: var(--student-navy);
  font-size: 1.38rem;
  font-weight: 900;
  line-height: 1;
}

.library-stat-label {
  color: var(--student-muted);
  font-size: 0.68rem;
  font-weight: 700;
}

.library-directory-card {
  min-width: 0;
  padding: 18px;
  background: white;
  border: 1px solid var(--student-border);
  border-radius: 22px;
}

.library-directory-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.library-directory-heading h2 {
  margin: 0 0 3px;
  color: var(--student-navy) !important;
  font-family: "Libre Baskerville", Georgia, serif !important;
  font-size: 1.15rem !important;
  font-weight: 700 !important;
}

.library-directory-heading p {
  margin: 0;
  color: var(--student-muted) !important;
  font-size: 0.75rem;
  line-height: 1.5;
}

.library-filter-grid {
  display: grid;
  grid-template-columns:
    minmax(240px, 1.5fr)
    minmax(170px, 0.72fr)
    minmax(150px, 0.58fr)
    auto;
  gap: 9px;
  align-items: end;
  margin-bottom: 13px;
}

.library-filter-field {
  min-width: 0;
  display: grid;
  gap: 5px;
}

.library-filter-field label {
  color: var(--student-navy);
  font-size: 0.69rem;
  font-weight: 800;
}

.library-search-wrap {
  position: relative;
}

.library-search-wrap i {
  position: absolute;
  top: 50%;
  left: 13px;
  z-index: 2;
  transform: translateY(-50%);
  color: var(--student-muted);
  pointer-events: none;
}

.library-search-wrap .form-control {
  padding-left: 38px;
}

body.psc-library-page .library-filter-grid .form-control,
body.psc-library-page .library-filter-grid .form-select {
  min-height: 43px;
  font-size: 0.76rem;
}

body.psc-library-page #resetFiltersBtn {
  min-height: 43px;
  min-width: 92px;
  padding-inline: 0.85rem;
}

.library-category-strip {
  margin-bottom: 15px;
  padding: 11px 12px;
  background: #fffdf6;
  border: 1px solid var(--student-border);
  border-radius: 15px;
}

.library-category-strip > small {
  color: var(--student-muted) !important;
  font-size: 0.68rem;
  font-weight: 800;
}

.category-badge {
  display: inline-flex;
  align-items: center;
  margin: 3px 4px 3px 0;
  padding: 0.4rem 0.65rem;
  color: var(--student-muted) !important;
  background: white !important;
  border: 1px solid var(--student-border) !important;
  border-radius: 999px !important;
  font-size: 0.67rem;
  font-weight: 800;
  cursor: pointer;
  user-select: none;
}

.category-badge:hover {
  color: var(--student-navy) !important;
  border-color: var(--student-gold) !important;
}

.category-badge.active {
  color: white !important;
  background: var(--student-navy) !important;
  border-color: var(--student-navy) !important;
}

.library-loading-card,
.empty-library {
  min-height: 300px;
  display: grid;
  place-items: center;
  align-content: center;
  padding: 24px;
  color: var(--student-muted);
  background: #fffdf6;
  border: 1px dashed var(--student-border-strong);
  border-radius: 18px;
  text-align: center;
}

.library-loading-card p,
.empty-library p {
  color: var(--student-muted) !important;
  font-size: 0.78rem;
}

.empty-library h5 {
  color: var(--student-navy) !important;
}

/* Generated book cards */
.book-card {
  height: 100%;
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: white !important;
  border: 1px solid var(--student-border) !important;
  border-radius: 18px !important;
  box-shadow: none !important;
  transition:
    transform 0.18s ease,
    border-color 0.18s ease;
}

.book-card:hover {
  transform: translateY(-2px);
  border-color: var(--student-gold) !important;
}

.book-cover {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background:
    linear-gradient(145deg, #f4f1df, #fffdf6);
  border-bottom: 1px solid var(--student-border);
}

.book-cover::after {
  content: "Physics SciEd Library";
  position: absolute;
  left: 10px;
  bottom: 9px;
  padding: 0.25rem 0.48rem;
  color: var(--student-navy);
  background: rgba(255, 249, 196, 0.92);
  border: 1px solid rgba(216, 207, 174, 0.85);
  border-radius: 999px;
  font-size: 0.57rem;
  font-weight: 800;
  letter-spacing: 0.025em;
}

.book-cover img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.book-info {
  min-width: 0;
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  padding: 14px;
}

.book-title {
  color: var(--student-navy) !important;
  font-family: "Libre Baskerville", Georgia, serif !important;
  font-size: 0.94rem;
  font-weight: 700;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.book-author {
  margin-top: 4px;
  color: var(--student-muted) !important;
  font-size: 0.72rem;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.category-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin: 2px 3px 2px 0;
  padding: 0.25rem 0.46rem;
  color: #7d5d00;
  background: var(--student-soft);
  border: 1px solid var(--student-border);
  border-radius: 999px;
  font-size: 0.61rem;
  font-weight: 800;
}

.book-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: auto;
  padding-top: 11px;
  color: var(--student-muted);
  font-size: 0.67rem;
  font-weight: 700;
}

body.psc-library-page .book-action {
  min-height: 39px;
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.library-access-note {
  margin-top: 14px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 13px;
  color: var(--student-muted);
  background: #fffdf6;
  border: 1px solid var(--student-border);
  border-radius: 14px;
  font-size: 0.72rem;
  line-height: 1.5;
}

.library-access-note i {
  flex: 0 0 auto;
  color: var(--student-navy);
  margin-top: 2px;
}

/* =========================================================
   Book reader additions
   ========================================================= */

body.psc-book-reader .student-reader-context-inner {
  background: white;
}

body.psc-book-reader .student-reader-return {
  text-decoration: none;
}

.book-reader-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(230px, 280px);
  gap: 14px;
  align-items: start;
}

.book-reader-document {
  min-width: 0;
  padding: 12px;
}

.book-reader-sidebar {
  position: sticky;
  top: 98px;
}

body.psc-book-reader .student-reader-canvas-wrap {
  min-height: calc(100vh - 210px);
}

.book-reader-library-note {
  padding: 14px;
  color: var(--student-muted);
  background: #fffdf6;
  border: 1px solid var(--student-border);
  border-radius: 16px;
  font-size: 0.73rem;
  line-height: 1.52;
}

.book-reader-library-note strong {
  color: var(--student-navy) !important;
}

@media (max-width: 1080px) {
  .library-intro-panel {
    grid-template-columns: 1fr;
  }

  .library-stat-grid {
    max-width: 520px;
  }

  .library-filter-grid {
    grid-template-columns:
      minmax(240px, 1.3fr)
      minmax(170px, 0.8fr)
      minmax(150px, 0.65fr);
  }

  .library-filter-action {
    grid-column: 1 / -1;
  }

  body.psc-library-page #resetFiltersBtn {
    width: fit-content !important;
  }
}

@media (max-width: 940px) {
  .book-reader-layout {
    grid-template-columns: 1fr;
  }

  .book-reader-sidebar {
    position: static;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
  }

  .book-reader-sidebar > * {
    height: 100%;
  }
}

@media (max-width: 760px) {
  .library-page-shell {
    padding-top: 12px;
  }

  .library-intro-panel,
  .library-directory-card {
    padding: 16px;
    border-radius: 18px;
  }

  .library-filter-grid {
    grid-template-columns: 1fr;
  }

  .library-filter-action {
    grid-column: auto;
  }

  body.psc-library-page #resetFiltersBtn {
    width: 100% !important;
  }

  .book-reader-sidebar {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .library-stat-grid {
    grid-template-columns: 1fr 1fr;
  }

  .library-stat-card {
    padding: 11px;
  }

  .library-stat-value {
    font-size: 1.18rem;
  }

  .book-cover {
    aspect-ratio: 16 / 11;
  }
}

@media print {
  body.psc-library-page .student-portal-navbar,
  body.psc-library-page .library-filter-grid,
  body.psc-library-page .library-category-strip,
  body.psc-library-page .book-action {
    display: none !important;
  }

  .library-page-shell {
    padding: 0 !important;
  }

  .library-intro-panel,
  .library-directory-card,
  .book-card {
    border: 0 !important;
  }
}
/* =========================================================
   Library header identity and dashboard-return hotfix v1.0.1
   ========================================================= */

body.psc-library-page .student-library-dashboard-link {
  min-height: 38px;
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 0.45rem 0.78rem !important;
  color: white !important;
  -webkit-text-fill-color: white !important;
  background: transparent !important;
  border: 1px solid rgba(255, 255, 255, 0.48) !important;
  border-radius: 999px !important;
  font-size: 0.74rem;
  font-weight: 800;
  line-height: 1;
  text-decoration: none !important;
  white-space: nowrap;
  box-shadow: none !important;
}

body.psc-library-page .student-library-dashboard-link:hover,
body.psc-library-page .student-library-dashboard-link:focus {
  color: var(--student-navy) !important;
  -webkit-text-fill-color: var(--student-navy) !important;
  background: var(--student-gold) !important;
  border-color: var(--student-gold) !important;
}

body.psc-library-page .student-portal-user {
  flex: 0 1 auto;
  overflow: visible;
}

body.psc-library-page #navbarWelcome {
  min-width: 0;
}

@media (max-width: 640px) {
  body.psc-library-page .student-library-dashboard-link {
    width: 40px;
    min-width: 40px;
    padding: 0 !important;
  }

  body.psc-library-page .student-library-dashboard-link span {
    display: none;
  }
}