.modal-validades {
  position: fixed;
  z-index: 999;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.4);
  display: flex;
  justify-content: center;
  align-items: center;
}

.modal-validades-box {
  background-color: #fff;
  padding: 30px;
  border-radius: 10px;
  width: 80%;
  max-height: 80%;
  overflow-y: auto;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
  position: relative;
}

.modal-validades .close {
  position: absolute;
  top: 10px;
  right: 20px;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
}