.catalog-viewer-page {
  --catalog-ink: #18221f;
  --catalog-muted: #777d79;
  --catalog-line: rgba(24, 34, 31, .16);
  min-height: 72vh;
  padding: clamp(72px, 7vw, 112px) 0 clamp(64px, 8vw, 112px);
  background: #f7f5f1;
  color: var(--catalog-ink);
}
.catalog-viewer__intro { margin-bottom: clamp(28px, 4vw, 52px); }
.catalog-viewer__eyebrow { margin: 0 0 14px; color: #24483c; font-size: 11px; font-weight: 700; letter-spacing: .16em; }
.catalog-viewer__title-row { display: block; border-bottom: 1px solid var(--catalog-line); padding-bottom: 28px; }
.catalog-viewer__title-row h1 { width: 100%; max-width: none; margin: 0; font-size: clamp(2rem, 3.15vw, 3.7rem); font-weight: 650; letter-spacing: -.05em; line-height: 1.03; white-space: nowrap; }
.catalog-viewer { max-width: 1760px; }
.catalog-viewer__toolbar { min-height: 58px; display: flex; align-items: center; justify-content: space-between; gap: 18px; border-bottom: 1px solid var(--catalog-line); margin-bottom: 24px; padding-bottom: 15px; }
.catalog-viewer__hint { display: flex; align-items: center; gap: 10px; margin: 0; color: var(--catalog-muted); font-size: 11px; letter-spacing: .11em; }
.catalog-viewer__hint > span { width: 7px; height: 7px; flex: 0 0 7px; border-radius: 50%; background: #567d62; }
.catalog-viewer__hint strong { font-size: 12px; font-weight: 600; letter-spacing: .02em; }
.catalog-viewer__hint small { font-size: 10px; }
.catalog-viewer__controls { display: flex; align-items: center; gap: 8px; }
.catalog-viewer__controls button, .catalog-viewer__controls a { min-height: 42px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 0 14px; border: 1px solid var(--catalog-line); background: transparent; color: var(--catalog-ink); font-size: 10px; font-weight: 650; letter-spacing: .1em; text-decoration: none; cursor: pointer; transition: background-color .18s ease, border-color .18s ease; }
.catalog-viewer__controls button:hover:not(:disabled), .catalog-viewer__controls a:hover { background: #fff; border-color: rgba(24, 34, 31, .42); }
.catalog-viewer__controls button:disabled { opacity: .4; cursor: not-allowed; }
.catalog-viewer__controls i { font-size: 16px; }
.catalog-viewer__controls svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.catalog-stage { position: relative; display: grid; width: 100%; height: min(88vh, 1100px); min-height: 700px; overflow: hidden; place-items: center; background: #d8d1c9; border: 1px solid rgba(24, 34, 31, .14); }
.catalog-stage::before { position: absolute; inset: 0; background: radial-gradient(circle at 50% 45%, rgba(255,255,255,.52), transparent 62%); content: ""; pointer-events: none; }
.catalog-book { position: relative; z-index: 2; outline: none; }
.catalog-book:focus-visible { outline: 2px solid #24483c; outline-offset: 5px; }
.catalog-page { display: grid; overflow: hidden; place-items: center; background: #fff; }
.catalog-page img { display: block; width: 100%; height: 100%; object-fit: contain; background: #fff; user-select: none; -webkit-user-drag: none; }
.catalog-book__arrow { position: absolute; z-index: 8; top: 50%; width: 50px; height: 50px; display: grid; place-items: center; transform: translateY(-50%); border: 1px solid rgba(24, 34, 31, .18); border-radius: 50%; background: rgba(255, 255, 255, .82); color: #19211f; cursor: pointer; box-shadow: 0 3px 18px rgba(0, 0, 0, .09); backdrop-filter: blur(5px); transition: color .2s ease, background-color .2s ease, transform .2s ease; }
.catalog-book__arrow i { font-size: 20px; }
.catalog-book__arrow--prev { left: 18px; }
.catalog-book__arrow--next { right: 18px; }
.catalog-book__arrow:hover { color: #fff; background: #18221f; transform: translateY(-50%) scale(1.05); }
.catalog-book__arrow:disabled { opacity: .35; cursor: not-allowed; }
.catalog-loader { position: absolute; z-index: 10; inset: 0; display: grid; place-content: center; gap: 17px; text-align: center; background: #d8d1c9; }
.catalog-loader[hidden] { display: none; }
.catalog-loader__ring { width: 42px; height: 42px; margin: auto; border: 1px solid rgba(24,34,31,.22); border-top-color: #18221f; border-radius: 50%; animation: catalogLoaderSpin .8s linear infinite; }
.catalog-loader strong { font-size: 12px; font-weight: 650; letter-spacing: .11em; text-transform: uppercase; }
.catalog-loader span:last-child { color: var(--catalog-muted); font-size: 11px; }
@keyframes catalogLoaderSpin { to { transform: rotate(360deg); } }
.catalog-page-counter { display: flex; align-items: center; justify-content: center; gap: 9px; padding-top: 22px; color: var(--catalog-muted); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; }
.catalog-page-counter strong { color: var(--catalog-ink); font-size: 14px; font-weight: 650; }
.catalog-viewer__error { margin: 18px auto 0; color: #a53232; text-align: center; }
.catalog-viewer__fallback { width: min(100% - 32px, 1200px); height: 75vh; display: block; margin: 0 auto; border: 1px solid var(--catalog-line); }
.catalog-viewer__empty { min-height: 42vh; display: grid; align-content: center; justify-items: center; text-align: center; }
.catalog-viewer__empty-mark { color: #f2aa00; font-size: 42px; font-weight: 800; letter-spacing: -.12em; }
.catalog-viewer__empty h2 { margin: 12px 0 5px; font-size: clamp(1.6rem, 3vw, 2.6rem); }
.catalog-viewer__empty p { color: var(--catalog-muted); }
.catalog-stage:fullscreen { width: 100vw; height: 100vh; min-height: 100vh; max-height: none; border: 0; background: #d8d1c9; }
@media (max-width: 900px) {
  .catalog-viewer__toolbar { align-items: flex-start; flex-direction: column; }
  .catalog-viewer__controls { width: 100%; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .catalog-viewer__controls button, .catalog-viewer__controls a { padding-inline: 8px; font-size: 9px; }
  .catalog-stage { height: 72vh; min-height: 520px; }
}
@media (max-width: 640px) {
  .catalog-viewer-page { padding-top: 58px; }
  .catalog-viewer__title-row { align-items: flex-start; flex-direction: column; gap: 18px; }
  .catalog-viewer__title-row h1 { font-size: clamp(1.8rem, 9vw, 3rem); white-space: normal; }
  .catalog-viewer__hint { flex-wrap: wrap; }
  .catalog-viewer__hint small { flex-basis: 100%; padding-left: 17px; }
  .catalog-viewer__controls { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .catalog-stage { height: 68vh; min-height: 430px; }
  .catalog-book__arrow { width: 38px; height: 38px; }
  .catalog-book__arrow--prev { left: 9px; }
  .catalog-book__arrow--next { right: 9px; }
  .catalog-viewer__fallback { width: 100%; height: 65vh; }
}
@media (prefers-reduced-motion: reduce) {
  .catalog-loader__ring { animation-duration: 1.8s; }
}