.categorias-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 10px;
  display: grid;
  /* La magia ocurre aquí: */
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 20px;
  align-items: start;
}

/* 1. La tarjeta contenedora (El marco) */
.categoria-card {
  border: 1px solid #333;
  background: #1a1a1e;
  margin: 20px 10px;
  border-radius: 8px;
  overflow: hidden; /* Esto es la clave: oculta todo lo que se salga */
}

/* 2. El encabezado clickable */
.categoria-header {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  cursor: pointer;
  background-color: #202025;
  position: relative;
  user-select: none;
}
.enlace__categoria:hover {
  color: var(--color-texto-hover);
}
.categoria-header h3 {
  margin: 0;
  font-size: 1.2rem;
  color: #fff;
}

.categoria-header .icon {
  position: absolute;
  right: 20px;
  transition: transform 0.3s;
}
.categoria-content {
  max-height: 0;
  opacity: 0; /* Empieza invisible */
  overflow: hidden;
  background-color: #1a1a1e;
  transition:
    max-height 0.4s cubic-bezier(0, 1, 0.5, 1),
    opacity 0.3s ease-out;
}
.hidden-check:checked ~ .categoria-content {
  max-height: 300px;
  opacity: 1;
  transition:
    max-height 0.5s cubic-bezier(0, 1, 0.5, 1),
    opacity 0.4s ease-in;
}
.sub-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr); /* 2 columnas */
  gap: 15px;
  padding: 20px; /* Padding interno, nunca uses margin aquí */
}
.sub-card {
  background-color: #252529;
  padding: 15px 5px;
  text-align: center;
  text-decoration: none;
  color: #fff;
  border-radius: 8px;
  border: 1px solid #444;
  transition: background 0.3s;
  display: block;
}
.sub-card:hover {
  background-color: #007bff;
  border-color: #007bff;
}
.hidden-check:checked ~ .categoria-header .icon {
  transform: rotate(180deg);
}
.hidden-check {
  display: none;
}