/* ============================================================
   CATALOG — reading room table + filter rail
   ============================================================ */

.catalog-header {
  padding: var(--space-12) 0 var(--space-8);
}
.catalog-header h1 {
  font-size: var(--fs-hero);
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.catalog-header p {
  color: var(--color-ink-soft);
  max-width: 52ch;
  font-size: 1.0625rem;
}
.catalog-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-rule);
  flex-wrap: wrap;
  gap: var(--space-3);
}
.catalog-meta__count {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--color-primary);
}
.catalog-meta__updated {
  font-size: var(--fs-tiny);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

/* ---------- LAYOUT ---------- */
.catalog-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--space-8);
  padding-bottom: var(--space-16);
}
@media (max-width: 900px) { .catalog-layout { grid-template-columns: 1fr; } }

/* ---------- FILTERS ---------- */
.filters {
  position: sticky;
  top: 100px;
  align-self: start;
  padding: var(--space-6);
  background: var(--color-card);
  border: 1px solid var(--color-rule-soft);
  border-radius: var(--radius-md);
}
@media (max-width: 900px) { .filters { position: static; } }
.filters h3 {
  font-family: var(--font-body);
  font-size: var(--fs-tiny);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-3);
  font-weight: 500;
}
.filters__group { margin-bottom: var(--space-6); }
.filters__group:last-child { margin-bottom: 0; }

.filters__search {
  width: 100%;
  padding: var(--space-3);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: var(--color-paper);
  font-size: var(--fs-small);
  transition: border-color var(--duration-fast) var(--ease-out);
}
.filters__search:focus {
  outline: none;
  border-color: var(--color-primary);
}

.filter-option {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  font-size: var(--fs-small);
  color: var(--color-ink-soft);
  cursor: pointer;
  user-select: none;
}
.filter-option input { accent-color: var(--color-accent); cursor: pointer; }
.filter-option__count {
  margin-left: auto;
  font-size: var(--fs-tiny);
  color: var(--color-ink-muted);
}
.filter-option:hover { color: var(--color-primary); }

.filters__reset {
  font-size: var(--fs-small);
  color: var(--color-accent);
  text-decoration: underline;
  cursor: pointer;
  margin-top: var(--space-3);
}

/* ---------- TABLE ---------- */
.catalog-table-wrap {
  background: var(--color-card);
  border: 1px solid var(--color-rule-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.catalog-table {
  width: 100%;
  border-collapse: collapse;
}
.catalog-table thead {
  background: var(--color-paper-deep);
  border-bottom: 2px solid var(--color-primary);
}
.catalog-table th {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--fs-tiny);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
.catalog-table th:hover { background: var(--color-primary-tint); }
.catalog-table th[data-sort]::after {
  content: " ↕";
  color: var(--color-ink-muted);
  font-size: 0.7em;
}
.catalog-table th.sort-asc::after { content: " ↑"; color: var(--color-accent); }
.catalog-table th.sort-desc::after { content: " ↓"; color: var(--color-accent); }

.catalog-table td {
  padding: var(--space-4);
  font-size: var(--fs-small);
  border-bottom: 1px solid var(--color-rule-soft);
  vertical-align: middle;
}
.catalog-table tr:last-child td { border-bottom: none; }
.catalog-table tr:hover td { background: var(--color-paper); }

.book-title {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  color: var(--color-ink);
  font-weight: 500;
  line-height: 1.3;
}
.book-isbn {
  font-family: 'Courier New', monospace;
  font-size: 0.8125rem;
  color: var(--color-ink-muted);
  letter-spacing: 0.02em;
}

.request-btn {
  padding: var(--space-2) var(--space-4);
  font-size: var(--fs-tiny);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--color-accent);
  color: white;
  border-radius: var(--radius-sm);
  transition: background var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}
.request-btn:hover { background: #a94830; }
.request-btn[disabled] {
  background: var(--color-rule);
  color: var(--color-ink-muted);
  cursor: not-allowed;
}

/* Mobile: card-stack view of table */
@media (max-width: 680px) {
  .catalog-table, .catalog-table thead, .catalog-table tbody, .catalog-table tr, .catalog-table th, .catalog-table td { display: block; }
  .catalog-table thead { display: none; }
  .catalog-table tr {
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-rule-soft);
  }
  .catalog-table td {
    padding: var(--space-1) 0;
    border: none;
  }
  .catalog-table td::before {
    content: attr(data-label) ": ";
    font-size: var(--fs-tiny);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-ink-muted);
    margin-right: var(--space-2);
  }
  .catalog-table td[data-label="Title"]::before { display: none; }
  .catalog-table td[data-label="Action"]::before { display: none; }
}

/* ---------- REQUEST MODAL ---------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(26, 26, 23, 0.5);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: var(--gutter);
}
.modal-backdrop.show { display: flex; }
.modal {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  max-width: 560px;
  width: 100%;
  max-height: min(90vh, 820px);
  overflow-y: auto;
  box-shadow: 0 24px 64px rgba(0,0,0,0.25);
  animation: modal-in var(--duration-base) var(--ease-out);
}
@keyframes modal-in {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.modal h3 {
  font-size: var(--fs-h2);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}
.modal__intro {
  font-size: var(--fs-small);
  color: var(--color-ink-soft);
  margin-bottom: var(--space-4);
  line-height: 1.5;
}
.modal__book {
  padding: var(--space-3);
  background: var(--color-paper-deep);
  border-left: 3px solid var(--color-accent);
  margin-bottom: var(--space-6);
  font-size: var(--fs-small);
}
.modal__book strong { display: block; font-family: var(--font-display); font-size: 1.0625rem; color: var(--color-ink); margin-bottom: 2px; }
.modal__field { margin-bottom: var(--space-4); }
.modal__field > label {
  display: block;
  font-size: var(--fs-tiny);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-1);
}
.modal__field input:not([type="radio"]), .modal__field textarea {
  width: 100%;
  padding: var(--space-3);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: var(--color-paper);
  font-size: var(--fs-small);
  font-family: inherit;
}
.modal__field input:not([type="radio"]):focus, .modal__field textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}
.modal__field--choice {
  border: 0;
  padding: 0;
  margin: 0 0 var(--space-4);
  min-width: 0;
}
.modal__field--choice legend {
  display: block;
  width: 100%;
  font-size: var(--fs-tiny);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-2);
}
.modal__choice-group {
  display: grid;
  gap: var(--space-2);
}
.modal__choice,
.modal__rating {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: var(--color-paper);
  cursor: pointer;
  font-size: var(--fs-small);
  color: var(--color-ink-soft);
}
.modal__choice input,
.modal__rating input {
  accent-color: var(--color-accent);
  flex: 0 0 auto;
}
.modal__scale-hint {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: var(--fs-tiny);
  color: var(--color-ink-muted);
  margin-bottom: var(--space-2);
}
.modal__rating-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-2);
}
.modal__rating {
  justify-content: center;
  padding: var(--space-2);
}
.modal__rating span {
  font-weight: 600;
  color: var(--color-ink);
}
@media (max-width: 560px) {
  .modal__rating-row {
    grid-template-columns: repeat(3, 1fr);
  }
}
.modal__actions {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  margin-top: var(--space-6);
}