#popup-aventuras {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.8);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.popup-box {
  max-width: 518px;
  width: 90%;
  border-radius: 8px;
  text-align: center;
  position: relative;
}

.popup-box img {
  width: 100%;
  border-radius: 6px;
}

#popup-cerrar {
  position: absolute;
    top: -45px;
    left: calc(50% - 15px);
  cursor: pointer;
  font-size: 30px;
  width: 30px;
}

.popup-box {
  max-width: 520px;
  width: 90%;
  max-height: 85vh;           /* 👈 CLAVE */
  position: relative;
}

.popup-box img {
  width: 100%;
  height: auto;
  max-height: 85vh;           /* 👈 CLAVE */
  object-fit: contain;        /* Mantiene proporción */
}

.img-vertical {
  max-height: 85vh;
}