/* Catálogos Trainee: tarjetas, lector PDF bajo demanda y estados accesibles. */
.catalogs {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 8% 10%, rgba(140, 198, 63, .16), transparent 30%),
    radial-gradient(circle at 92% 85%, rgba(31, 91, 152, .14), transparent 34%),
    #fff;
}

.catalogs::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(3, 19, 38, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(3, 19, 38, .035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, transparent, #000 20%, #000 80%, transparent);
}

.catalogs .wrap { position: relative; z-index: 1; }
.catalogs-intro { display: flex; justify-content: space-between; gap: 36px; align-items: end; }
.catalogs-intro > div { max-width: 860px; }
.catalogs-note {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border: 1px solid rgba(31, 91, 152, .12);
  border-radius: 999px;
  background: rgba(255, 255, 255, .76);
  color: var(--blue);
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 14px 42px rgba(3, 19, 38, .07);
}
.catalogs-note::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 5px rgba(140, 198, 63, .15); }

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 48px;
}

.catalog-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid rgba(3, 19, 38, .08);
  border-radius: 30px;
  background: rgba(255, 255, 255, .9);
  box-shadow: 0 24px 70px rgba(3, 19, 38, .09);
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.catalog-card:hover { transform: translateY(-9px); border-color: rgba(140, 198, 63, .48); box-shadow: 0 34px 90px rgba(31, 91, 152, .16); }
.catalog-card--featured { grid-column: span 2; display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr); }
.catalog-card--featured .catalog-cover { min-height: 100%; aspect-ratio: auto; }

.catalog-cover { position: relative; overflow: hidden; aspect-ratio: 4 / 3; background: #e9edf1; }
.catalog-cover::after { content: ""; position: absolute; inset: auto 0 0; height: 45%; background: linear-gradient(transparent, rgba(3, 19, 38, .3)); pointer-events: none; }
.catalog-cover img { width: 100%; height: 100%; object-fit: cover; object-position: top center; transition: transform .7s ease; }
.catalog-card:hover .catalog-cover img { transform: scale(1.035); }
.catalog-number {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 13px;
  border-radius: 999px;
  background: rgba(3, 19, 38, .86);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  backdrop-filter: blur(12px);
}

.catalog-content { display: flex; min-height: 230px; flex-direction: column; padding: 24px; }
.catalog-kicker { margin: 0 0 10px; color: var(--blue); font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.catalog-card h3 { margin: 0; color: #071425; font-size: 23px; line-height: 1.05; letter-spacing: -.035em; }
.catalog-description { margin: 13px 0 20px; color: #5f6872; font-size: 15px; line-height: 1.4; }
.catalog-meta { display: flex; flex-wrap: wrap; gap: 8px; margin: auto 0 18px; }
.catalog-meta span { padding: 7px 10px; border-radius: 999px; background: #f0f4f7; color: #41505f; font-size: 12px; font-weight: 700; }
.catalog-actions { display: grid; grid-template-columns: 1fr auto; gap: 9px; }
.catalog-action {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 15px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  transition: transform .22s ease, background .22s ease, color .22s ease, border-color .22s ease;
}
.catalog-action svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.catalog-action--view { background: var(--blue); color: #fff; }
.catalog-action--view:hover, .catalog-action--view:focus-visible { background: #123f70; transform: translateY(-2px); }
.catalog-action--download { width: 44px; padding: 0; border-color: rgba(3, 19, 38, .12); background: #fff; color: var(--blue); }
.catalog-action--download:hover, .catalog-action--download:focus-visible { border-color: var(--green); background: rgba(140, 198, 63, .12); transform: translateY(-2px); }
.catalog-action:focus-visible, .catalog-viewer button:focus-visible, .catalog-viewer input:focus-visible { outline: 3px solid rgba(140, 198, 63, .55); outline-offset: 3px; }

.catalog-viewer {
  position: fixed;
  inset: 0;
  z-index: 10020;
  display: grid;
  padding: clamp(10px, 2vw, 28px);
  background: rgba(2, 8, 16, .92);
  backdrop-filter: blur(26px) saturate(1.15);
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  transition: opacity .24s ease;
}
.catalog-viewer.is-open { opacity: 1; pointer-events: auto; visibility: visible; }
.catalog-viewer-shell {
  position: relative;
  display: grid;
  width: min(1500px, 100%);
  height: 100%;
  min-height: 0;
  margin: auto;
  grid-template-rows: auto minmax(0, 1fr) auto;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 30px;
  background: linear-gradient(150deg, #10243a, #06101d 64%, #071425);
  box-shadow: 0 38px 140px rgba(0, 0, 0, .62);
}
.catalog-viewer-toolbar { display: flex; min-width: 0; align-items: center; gap: 16px; padding: 14px 18px; border-bottom: 1px solid rgba(255, 255, 255, .11); }
.catalog-viewer-heading { min-width: 0; margin-right: auto; }
.catalog-viewer-eyebrow { display: block; margin-bottom: 3px; color: var(--green); font-size: 10px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.catalog-viewer-title { display: block; overflow: hidden; color: #fff; font-size: clamp(16px, 2vw, 22px); font-weight: 700; text-overflow: ellipsis; white-space: nowrap; }
.catalog-viewer-download { flex: 0 0 auto; background: var(--green); color: #071425; }
.catalog-viewer-download:hover { background: #a8dc54; }
.catalog-viewer-close, .catalog-page-arrow {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, .16);
  background: rgba(255, 255, 255, .09);
  color: #fff;
  cursor: pointer;
}
.catalog-viewer-close { flex: 0 0 auto; width: 44px; height: 44px; border-radius: 50%; font-size: 27px; line-height: 1; }
.catalog-viewer-close:hover, .catalog-page-arrow:hover { background: rgba(255, 255, 255, .18); }

.catalog-viewer-stage { position: relative; display: grid; min-height: 0; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: clamp(8px, 2vw, 22px); overflow: hidden; padding: clamp(10px, 2vw, 24px); touch-action: pan-y; }
.catalog-viewer-stage::before { content: ""; position: absolute; inset: 12% 20%; border-radius: 50%; background: rgba(31, 91, 152, .25); filter: blur(90px); pointer-events: none; }
.catalog-page-arrow { z-index: 2; width: clamp(42px, 5vw, 58px); height: clamp(42px, 5vw, 58px); border-radius: 50%; font-size: 32px; transition: transform .2s ease, background .2s ease, opacity .2s ease; }
.catalog-page-arrow:hover { transform: scale(1.05); }
.catalog-page-arrow:disabled { cursor: not-allowed; opacity: .3; transform: none; }

.catalog-book {
  position: relative;
  z-index: 1;
  display: flex;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  align-items: center;
  justify-content: center;
  gap: 3px;
  perspective: 1800px;
  filter: drop-shadow(0 26px 36px rgba(0, 0, 0, .36));
}
.catalog-page { display: block; max-width: calc(50% - 2px); max-height: 100%; background: #fff; }
.catalog-page:first-of-type { border-radius: 5px 0 0 5px; transform-origin: right center; }
.catalog-page:last-of-type { border-radius: 0 5px 5px 0; transform-origin: left center; }
.catalog-page.is-single { max-width: 100%; border-radius: 5px; }
.catalog-page[hidden] { display: none; }
.catalog-book::after { content: ""; position: absolute; top: 2%; bottom: 2%; left: 50%; width: 2px; opacity: .42; background: linear-gradient(90deg, rgba(0, 0, 0, .35), rgba(255, 255, 255, .7), rgba(0, 0, 0, .28)); transform: translateX(-50%); }
.catalog-book.is-single::after { display: none; }
.catalog-book.flip-next .catalog-page:last-of-type { animation: catalogFlipNext .44s ease both; }
.catalog-book.flip-prev .catalog-page:first-of-type { animation: catalogFlipPrev .44s ease both; }
@keyframes catalogFlipNext { 0% { opacity: .48; transform: rotateY(-12deg) translateX(-2%); } 100% { opacity: 1; transform: none; } }
@keyframes catalogFlipPrev { 0% { opacity: .48; transform: rotateY(12deg) translateX(2%); } 100% { opacity: 1; transform: none; } }

.catalog-loader, .catalog-error { position: absolute; z-index: 4; inset: 50% auto auto 50%; width: min(420px, 82%); padding: 24px; border: 1px solid rgba(255, 255, 255, .15); border-radius: 24px; background: rgba(3, 19, 38, .9); color: #fff; text-align: center; transform: translate(-50%, -50%); backdrop-filter: blur(18px); }
.catalog-loader[hidden], .catalog-error[hidden] { display: none; }
.catalog-spinner { width: 36px; height: 36px; margin: 0 auto 14px; border: 3px solid rgba(255, 255, 255, .18); border-top-color: var(--green); border-radius: 50%; animation: catalogSpin .8s linear infinite; }
.catalog-load-label { display: block; font-weight: 700; }
.catalog-load-progress { display: block; margin-top: 6px; color: rgba(255, 255, 255, .68); font-size: 13px; }
.catalog-error p { margin: 0 0 16px; line-height: 1.45; }
.catalog-error .catalog-action { background: var(--green); color: #071425; }
.catalog-error-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
.catalog-error .catalog-action--secondary { border-color: rgba(255, 255, 255, .3); background: transparent; color: #fff; }
@keyframes catalogSpin { to { transform: rotate(360deg); } }

.catalog-viewer-controls { display: grid; grid-template-columns: auto minmax(160px, 1fr) auto; align-items: center; gap: 16px; padding: 13px 18px 16px; border-top: 1px solid rgba(255, 255, 255, .11); color: #fff; }
.catalog-page-status { min-width: 150px; color: rgba(255, 255, 255, .84); font-size: 13px; font-weight: 700; }
.catalog-page-range { width: 100%; height: 5px; accent-color: var(--green); cursor: pointer; }
.catalog-viewer-hint { color: rgba(255, 255, 255, .56); font-size: 12px; text-align: right; }

@media (max-width: 1080px) {
  .catalog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .catalog-card--featured { grid-column: span 2; }
  .catalogs-intro { align-items: start; flex-direction: column; }
}

@media (max-width: 859px) {
  .catalog-page { max-width: 100%; border-radius: 5px !important; }
  .catalog-book::after { display: none; }
  .catalog-viewer-download span { display: none; }
  .catalog-viewer-download { width: 44px; padding: 0; }
  .catalog-viewer-stage { grid-template-columns: minmax(0, 1fr); padding: 10px 54px; }
  .catalog-page-arrow { position: absolute; top: 50%; transform: translateY(-50%); }
  .catalog-page-arrow:hover { transform: translateY(-50%) scale(1.04); }
  .catalog-page-arrow--prev { left: 8px; }
  .catalog-page-arrow--next { right: 8px; }
  .catalog-viewer-hint { display: none; }
  .catalog-viewer-controls { grid-template-columns: auto 1fr; }
}

@media (max-width: 640px) {
  .catalog-grid { grid-template-columns: 1fr; }
  .catalog-card--featured { grid-column: auto; display: block; }
  .catalog-card--featured .catalog-cover { min-height: 0; aspect-ratio: 4 / 3; }
  .catalog-content { min-height: 0; }
  .catalogs-note { white-space: normal; }
  .catalog-viewer { padding: 0; }
  .catalog-viewer-shell { border: 0; border-radius: 0; }
  .catalog-viewer-toolbar { gap: 9px; padding: 10px 12px; }
  .catalog-viewer-eyebrow { display: none; }
  .catalog-viewer-close, .catalog-viewer-download { width: 40px; height: 40px; min-height: 40px; }
  .catalog-viewer-stage { padding-right: 48px; padding-left: 48px; }
  .catalog-page-status { min-width: 0; }
  .catalog-viewer-controls { gap: 10px; padding: 11px 13px 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .catalog-card, .catalog-cover img, .catalog-action, .catalog-viewer, .catalog-page-arrow { transition: none !important; }
  .catalog-book.flip-next .catalog-page:last-of-type, .catalog-book.flip-prev .catalog-page:first-of-type, .catalog-spinner { animation: none !important; }
}