.timeline {
  position: relative;
  margin: 1rem 0 0;
  padding-left: 1.2rem;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 0.2rem;
  top: 0.2rem;
  bottom: 0.2rem;
  width: 3px;
  background: linear-gradient(#e7e7e7, #e7e7e7);
  border-radius: 999px;
}
.timeline__item {
  position: relative;
  margin: 0.6rem 0;
  list-style: none;
}
.timeline__item::before {
  content: "";
  position: absolute;
  left: -0.6rem;
  top: 0.6rem;
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: var(--cecns-gold);
  box-shadow: 0 0 0 4px #fff;
}
.timeline__head {
  appearance: none;
  background: #fff;
  border: 1px solid #eee2c8;
  width: 100%;
  text-align: left;
  border-radius: 12px;
  padding: 0.75rem 0.9rem;
  font-weight: 800;
  color: #15334a;
  cursor: pointer;
}
.timeline__body {
  display: none;
  border-left: 4px solid var(--border-left-color);
  padding: 0.8rem 0.9rem;
  margin: 0.5rem 0 0 0.4rem;
  background: #fff;
  border-radius: 10px;
}
.timeline__item.is-open .timeline__body {
  display: block;
}
.timeline__body img {
  width: 100%;
  border-radius: 10px;
  margin-top: 0.5rem;
  max-height: 360px;
  object-fit: cover;
}

.oferta {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(360px, 1.15fr);
  gap: 1rem;
  align-items: center;
}
@media (max-width: 800px) {
  .oferta {
    grid-template-columns: 1fr;
  }
}
.oferta__media {
  position: relative;
  height: 320px;
  border-radius: 12px;
  overflow: hidden;
}
@media (max-width: 800px) {
  .oferta__media {
    height: 220px;
  }
}

.rotator {
  position: relative;
  width: 100%;
  height: 100%;
}
.rotator img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.9s ease;
}
.rotator img.is-active {
  opacity: 1;
}

.oferta__text p {
  margin: 0.2rem 0 0.4rem;
  color: #374151;
}
.oferta__text .bullet {
  margin: 0.35rem 0 0 1rem;
}
/* === Oferta Académica: énfasis en el nivel activo === */
.timeline__item.is-open .timeline__head {
  background: #002d62; /* azul colegio */
  color: #fff;
  border-color: #002d62;
  box-shadow: 0 0 0 2px rgba(0, 45, 98, 0.12);
}

.timeline__item.is-open::before {
  background: #002d62; /* “puntito” de la línea */
}

.timeline__item.is-open .timeline__body {
  border-left-color: #002d62;
}

/* Accesibilidad de foco */
.timeline__head:focus-visible {
  outline: 3px solid rgba(0, 45, 98, 0.35);
  outline-offset: 2px;
}

/* Opcional: cursor mano sobre la imagen (siguiente) */
.oferta__media {
  cursor: pointer;
}