.catalog-page {
  background:
    linear-gradient(180deg, rgba(74, 44, 32, 0.08), transparent 340px),
    var(--paper);
}

.catalog-page .announcement {
  display: none;
}

.catalog-page .site-header {
  top: 0;
  background: #1b0f0c;
  color: rgba(255, 253, 248, 0.95);
  border-bottom: 1px solid rgba(255, 253, 248, 0.12);
  backdrop-filter: blur(18px);
}

.catalog-page .mega-menu {
  top: var(--header-h);
}

.catalog-page .search-panel {
  top: 0;
}

.catalog-page .site-header::before {
  display: none;
}

.catalog-page .site-header > .brand {
  opacity: 1;
}

.catalog-viewer {
  padding: calc(var(--header-h) + 22px) 18px 54px;
}

.catalog-viewer-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 20px;
}

.catalog-viewer-head h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 54px);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.catalog-viewer-head [data-page-indicator] {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.catalog-back-link {
  display: inline-block;
  margin: 0 0 10px;
  font-size: 12px;
  text-transform: uppercase;
  text-decoration: underline;
  text-underline-offset: 4px;
  color: var(--muted);
}

.catalog-stage {
  position: relative;
  display: grid;
  place-items: center;
  padding: clamp(12px, 2vw, 26px);
  overflow: auto;
  background:
    radial-gradient(circle at 50% 16%, rgba(255, 253, 248, 0.22), transparent 34%),
    linear-gradient(135deg, #1b0f0c, #4a2c20 58%, #24120d);
  box-shadow: var(--shadow);
  scrollbar-color: rgba(255, 253, 248, 0.38) transparent;
}

.catalog-stage.is-fullscreen {
  position: fixed;
  inset: 0;
  z-index: 95;
  min-height: 100svh;
  padding: clamp(14px, 3vw, 34px);
  border: 0;
}

.catalog-book {
  width: min(100%, 1500px);
  height: min(70svh, 780px);
}

.catalog-stage.is-fullscreen .catalog-book {
  width: min(96vw, 1760px);
  height: min(92svh, 1120px);
}

.catalog-book .page {
  background: var(--paper);
}

.catalog-book img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  user-select: none;
}

.catalog-page-hotspot {
  position: absolute;
  top: 0;
  bottom: 0;
  z-index: 6;
  width: 50%;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.catalog-page-hotspot-prev {
  left: 0;
}

.catalog-page-hotspot-next {
  right: 0;
}

.catalog-fallback {
  max-width: 460px;
  padding: 34px 24px;
  background: var(--paper);
  color: var(--ink);
  text-align: center;
}

.catalog-fallback h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.catalog-fallback p {
  color: var(--muted);
}

.catalog-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 18px;
}

.catalog-stage.is-fullscreen + .catalog-controls {
  position: fixed;
  left: 50%;
  bottom: 18px;
  z-index: 96;
  width: min(1120px, calc(100vw - 28px));
  transform: translateX(-50%);
  padding: 10px;
  border: 1px solid rgba(255, 253, 248, 0.16);
  background: rgba(27, 15, 12, 0.78);
  backdrop-filter: blur(14px);
}

.catalog-control {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, opacity 0.2s ease;
}

.catalog-control:hover,
.catalog-control:focus-visible {
  transform: translateY(-1px);
  background: var(--brown);
  color: #fff;
}

.catalog-control:disabled {
  cursor: default;
  opacity: 0.42;
  transform: none;
  background: var(--paper);
  color: var(--muted);
}

.catalog-control span {
  font-size: 20px;
  line-height: 0;
}

.catalog-contact {
  margin-top: 0;
}

@media (max-width: 980px) {
  .catalog-book {
    width: min(100%, 860px);
    height: min(72svh, 760px);
  }
}

@media (max-width: 640px) {
  .catalog-viewer {
    padding: calc(var(--header-h) + 18px) 10px 44px;
  }

  .catalog-viewer-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .catalog-stage {
    padding: 10px;
  }

  .catalog-book {
    width: min(100%, 520px);
    height: min(70svh, 660px);
  }

  .catalog-controls {
    justify-content: stretch;
  }

  .catalog-control {
    flex: 1 1 calc(50% - 10px);
    padding: 0 12px;
  }
}