.modal {
  width: 100%;
  height: 100vh;
  background: rgba(12, 1, 5, 0.808);
  position: absolute;
  top: 0;
  left: 0;
  display: flex;

  animation: modal 2s 3s forwards;
  visibility: hidden;
  opacity: 0;
}
.close {
  position: fixed;
  color: #fff;
  font-size: 25px;
  z-index: 50;
  background: rgba(248, 244, 244, 0.979);
  height: 40px;
  width: 40px;
  line-height: 40px;
  border-radius: 50%;
  right: 10px;
  cursor: pointer;
}

.contenido {
  margin: auto;
  width: 60%;
  height: 90%;
  border-radius: 10px;
}


@keyframes modal {
  100% {
    visibility: visible;
    opacity: 1;
  }
}