/* ─── PÁGINA DE RECURSOS ─── */

/* Hero */
.recursos-hero {
  padding: 8rem 4rem 4rem;
  background: var(--ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 3rem;
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}
.recursos-hero::before {
  content: '📚';
  position: absolute; right: 4rem; top: 50%;
  transform: translateY(-50%);
  font-size: 14rem; opacity: 0.04;
  pointer-events: none;
}
.recursos-hero-content { flex: 1; min-width: 280px; position: relative; z-index: 2; }
.recursos-hero-content .section-label { color: rgba(255,255,255,0.4); }
.recursos-hero-content .section-label::before { background: rgba(255,255,255,0.3); }
.recursos-hero-content h1 {
  font-family: var(--ff-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  color: white; font-weight: 700; line-height: 1.1;
  margin-bottom: 1rem;
}
.recursos-hero-content h1 em { font-style: italic; color: var(--gold); }
.recursos-hero-content p { color: rgba(255,255,255,0.6); font-size: 1rem; line-height: 1.8; max-width: 480px; }

.recursos-hero-stats {
  display: flex; gap: 2rem;
  position: relative; z-index: 2;
}
.recursos-stat {
  display: flex; flex-direction: column; align-items: center;
  padding: 1.25rem 2rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
}
.recursos-stat-num {
  font-family: var(--ff-display);
  font-size: 2.5rem; font-weight: 700; color: var(--gold);
  line-height: 1;
}
.recursos-stat-label {
  font-size: 0.72rem; color: rgba(255,255,255,0.5);
  text-align: center; margin-top: 0.35rem; line-height: 1.4;
}

/* Filtros */
.recursos-filters {
  padding: 1.5rem 4rem;
  display: flex; gap: 0.5rem; flex-wrap: wrap;
  background: var(--white);
  border-bottom: 1px solid var(--border);
}
.recursos-filter {
  padding: 0.4rem 1rem;
  border: 1.5px solid var(--border-strong);
  border-radius: var(--radius-pill);
  background: var(--white);
  font-family: var(--ff-body);
  font-size: 0.82rem; font-weight: 500;
  color: var(--ink-mid);
  cursor: pointer;
  transition: all 0.2s;
}
.recursos-filter:hover { border-color: var(--green); color: var(--green); }
.recursos-filter.active {
  background: var(--green); border-color: var(--green); color: white;
}

/* Grid de tarjetas */
.recursos-grid {
  padding: 3rem 4rem 5rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.75rem;
  background: var(--cream);
  min-height: 40vh;
}
.recursos-loading, .recursos-empty {
  grid-column: 1 / -1; text-align: center;
  padding: 4rem 2rem; color: var(--ink-soft); font-size: 1rem;
}

/* Tarjeta de unidad */
.unit-card {
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}
.unit-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.1);
}
.unit-card-cover {
  aspect-ratio: 16/9;
  background: var(--green);
  position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.unit-card-cover-emoji {
  font-size: 3.5rem; opacity: 0.6;
}
.unit-card-cover img {
  width: 100%; height: 100%; object-fit: cover; display: block;
}
.unit-card-grade {
  position: absolute; top: 0.75rem; left: 0.75rem;
  background: rgba(0,0,0,0.55);
  color: white; font-size: 0.65rem; font-weight: 700;
  padding: 0.2rem 0.6rem; border-radius: var(--radius-pill);
  backdrop-filter: blur(4px);
  letter-spacing: 0.04em; text-transform: uppercase;
}
.unit-card-body {
  padding: 1.25rem 1.5rem;
  flex: 1; display: flex; flex-direction: column;
}
.unit-card-unit {
  font-size: 0.68rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--green); margin-bottom: 0.4rem;
}
.unit-card-title {
  font-family: var(--ff-display);
  font-size: 1.2rem; font-weight: 700; color: var(--ink);
  line-height: 1.3; margin-bottom: 0.5rem;
}
.unit-card-topic {
  font-size: 0.85rem; color: var(--ink-mid); line-height: 1.6; flex: 1;
  margin-bottom: 1rem;
}
.unit-card-meta {
  display: flex; align-items: center; justify-content: space-between;
  border-top: 1px solid var(--border); padding-top: 0.75rem;
}
.unit-card-activities {
  font-size: 0.72rem; color: var(--ink-soft);
}
.unit-card-cta {
  font-size: 0.78rem; font-weight: 600;
  color: var(--green); text-decoration: none;
  background: var(--green-pale);
  padding: 0.3rem 0.85rem; border-radius: var(--radius-pill);
  border: 1px solid var(--green-light);
  transition: background 0.2s;
}
.unit-card-cta:hover { background: var(--green-light); }

/* Nav link activo */
.nav-link--active { color: var(--green) !important; }

/* ─── RESPONSIVE ─── */
@media (max-width: 1024px) {
  .recursos-hero { padding: 7rem 2rem 3rem; }
  .recursos-filters { padding: 1.25rem 2rem; }
  .recursos-grid { padding: 2.5rem 2rem 4rem; }
  .recursos-hero-stats { gap: 1rem; }
}
@media (max-width: 640px) {
  .recursos-hero { padding: 6rem 1.25rem 2.5rem; flex-direction: column; }
  .recursos-hero::before { display: none; }
  .recursos-hero-stats { width: 100%; justify-content: center; }
  .recursos-stat { padding: 1rem 1.5rem; }
  .recursos-filters { padding: 1rem 1.25rem; }
  .recursos-grid { padding: 2rem 1.25rem 3rem; grid-template-columns: 1fr; }
}