/* ============================================================
   Books Catalogue page (books.html)
   ============================================================ */

.catalogue-page { padding-top: calc(var(--nav-h) + 40px); background: var(--bg-alt); min-height: 70vh; }

.catalogue-page__back {
  display: inline-flex; align-items: center; gap: 6px; font-weight: 700; font-size: 0.92rem; color: var(--forest);
  margin-bottom: 28px; transition: transform var(--dur) var(--ease);
}
.catalogue-page__back::before { content: "←"; }
.catalogue-page__back:hover { transform: translateX(-4px); color: var(--rust-dark); }

.catalogue-page__heading { font-size: clamp(1.8rem, 1.4rem + 1.6vw, 2.6rem); margin-bottom: 12px; }
.catalogue-page__desc { color: var(--ink-muted); font-size: 1.02rem; max-width: 620px; }

/* ---- Toolbar: search + filters ---- */
.catalogue-toolbar {
  display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: space-between;
  background: var(--surface); border: 1px solid var(--border-soft); border-radius: var(--r-md);
  padding: 16px 18px; box-shadow: var(--shadow-sm); margin: 34px 0 20px;
}
.catalogue-search { position: relative; flex: 1 1 260px; display: flex; align-items: center; }
.catalogue-search svg { position: absolute; left: 14px; color: var(--ink-muted); pointer-events: none; }
.catalogue-search input {
  width: 100%; height: 46px; padding: 0 16px 0 42px; border-radius: var(--r-sm); border: 1.5px solid var(--border);
  background: var(--bg-alt); font-weight: 500; font-size: 0.94rem; color: var(--ink);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.catalogue-search input::placeholder { color: var(--ink-muted); }
.catalogue-search input:focus { outline: none; border-color: var(--forest); background: var(--surface); }

.catalogue-filters { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.catalogue-filters select {
  height: 46px; padding: 0 38px 0 16px; border-radius: var(--r-sm); border: 1.5px solid var(--border);
  background-color: var(--bg-alt);
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="%2320291F" stroke-width="2"><polyline points="6 9 12 15 18 9"/></svg>');
  background-repeat: no-repeat; background-position: right 14px center;
  appearance: none; -webkit-appearance: none; font-weight: 600; font-size: 0.9rem; color: var(--ink);
  cursor: pointer; transition: border-color var(--dur) var(--ease);
}
.catalogue-filters select:hover, .catalogue-filters select:focus { border-color: var(--forest); outline: none; }

.catalogue-filters__clear { color: var(--rust-dark); padding: 10px 8px; border-radius: var(--r-sm); font-weight: 700; font-size: 0.88rem; transition: color var(--dur) var(--ease); }
.catalogue-filters__clear:hover { color: var(--rust); text-decoration: underline; }

.catalogue-results-count { color: var(--ink-muted); font-weight: 700; font-size: 0.88rem; margin-bottom: 18px; }

/* ---- Grid ---- */
.catalogue-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 24px; padding-bottom: 90px;
}
.catalogue-grid .book-card { width: auto; }

/* ---- Empty state ---- */
.catalogue-empty {
  text-align: center; padding: 70px 20px; background: var(--surface); border: 1.5px dashed var(--border);
  border-radius: var(--r-lg); display: flex; flex-direction: column; align-items: center; gap: 8px; margin-bottom: 90px;
}
.catalogue-empty__icon { display: grid; place-items: center; width: 60px; height: 60px; border-radius: var(--r-md); background: var(--bg-alt); color: var(--forest); margin-bottom: 8px; }
.catalogue-empty h3 { font-size: 1.2rem; }
.catalogue-empty p { color: var(--ink-muted); max-width: 440px; }
.catalogue-empty .btn { margin-top: 10px; }

@media (max-width: 620px) {
  .catalogue-toolbar { flex-direction: column; align-items: stretch; }
  .catalogue-filters { justify-content: space-between; }
  .catalogue-filters select { flex: 1; }
}