/* ==========================================================================
   Lucidez · Listas de contenido (FASE 2)
   Cabecera de categoria + tarjetas. Aparicion en cascada: Fade + translateY
   corto, stagger de 40-60ms entre tarjetas, ease-out. Bajo reduced-motion
   todas aparecen sin desplazamiento.
   ========================================================================== */

.library {
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}

.library__head {
  text-align: center;
}
.library__eyebrow {
  font-size: var(--fs-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-soft);
  margin: 0 0 var(--sp-2);
}
.library__title {
  font-family: var(--font-display);
  font-variation-settings: var(--fraunces-axes);
  font-size: var(--fs-xl);
  color: var(--text);
  margin: 0;
}

.library__list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.card {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  width: 100%;
  padding: var(--sp-4);
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  text-align: left;
  opacity: 0;
  transform: translateY(8px);
  animation: card-reveal var(--dur-view) var(--ease-out) forwards;
  animation-delay: calc(var(--card-i, 0) * 45ms);
  transition: transform var(--dur-press) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}
.card:active { transform: scale(0.98); }
@media (hover: hover) and (pointer: fine) {
  .card:hover { border-color: var(--accent); }
}
@keyframes card-reveal { to { opacity: 1; transform: translateY(0); } }

.card__icon {
  flex: none;
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: var(--radius-pill);
  background: var(--accent-tint);
  color: var(--accent);
}
.card__icon .ic { width: 20px; height: 20px; }

.card__body { flex: 1; min-width: 0; }
.card__title {
  font-family: var(--font-body);
  font-weight: var(--fw-label);
  font-size: var(--fs-base);
  color: var(--text);
  margin: 0 0 2px;
}
.card__desc {
  font-size: var(--fs-sm);
  color: var(--text-soft);
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.card__meta {
  flex: none;
  font-size: var(--fs-xs);
  color: var(--text-soft);
  font-variant-numeric: tabular-nums;
}
.card__end {
  flex: none;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-xs);
  color: var(--text-soft);
  font-variant-numeric: tabular-nums;
}
.card__lock { width: 14px; height: 14px; color: var(--text-soft); }

.library__empty {
  text-align: center;
  color: var(--text-soft);
  padding: var(--sp-6) 0;
}

/* --- Ejercicios: lectura guiada paso a paso ----------------------------- */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  counter-reset: step;
}
.steps__item {
  counter-increment: step;
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  padding: var(--sp-4);
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  color: var(--text);
  opacity: 0;
  transform: translateY(8px);
  animation: card-reveal var(--dur-view) var(--ease-out) forwards;
  animation-delay: calc(var(--card-i, 0) * 45ms);
}
.steps__item::before {
  content: counter(step);
  flex: none;
  width: 28px; height: 28px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--accent-tint);
  color: var(--accent);
  font-size: var(--fs-xs);
  font-weight: var(--fw-label);
  font-variant-numeric: tabular-nums;
}

@media (prefers-reduced-motion: reduce) {
  .steps__item { animation: none; opacity: 1; transform: none; }
}

/* --- Detalle de un item (cabecera compartida por audio/pdf/texto) ------ */
.detail__back {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  color: var(--text-soft);
  font-size: var(--fs-sm);
  margin-bottom: var(--sp-4);
  transition: color var(--dur-fast) var(--ease-out);
}
.detail__back .ic { width: 18px; height: 18px; }
@media (hover: hover) and (pointer: fine) {
  .detail__back:hover { color: var(--text); }
}

.detail__title {
  font-family: var(--font-display);
  font-variation-settings: var(--fraunces-axes);
  font-size: var(--fs-lg);
  color: var(--text);
  margin: 0 0 var(--sp-2);
}
.detail__desc {
  color: var(--text-soft);
  margin: 0 0 var(--sp-5);
}
.detail__subtitle {
  font-family: var(--font-body);
  font-weight: var(--fw-label);
  font-size: var(--fs-sm);
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 var(--sp-3);
}

@media (prefers-reduced-motion: reduce) {
  .card { animation: none; opacity: 1; transform: none; }
}