.accordion { display: grid; gap: 12px; }
.acc {
  border: 1px solid #e7e7e7;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
  overflow: hidden;
}
.acc > summary {
  list-style: none;
  cursor: pointer;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-weight: 700;
  background: #fafafa;
}
.acc[open] > summary { background: #f3f8ff; }
.acc > summary::-webkit-details-marker { display: none; }
.acc__panel { padding: 14px; }

.accordion .grid-episodios {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.2rem;
}

@media (max-width: 900px) {
  .accordion .grid-episodios { grid-template-columns: 1fr; }
}