.fondo_gris{
  position: fixed;
  background-color: gray;
  opacity: 0.6;
  width: 100vw;
  height: 100vh;
  z-index: 100;
}
.text_spinner{
  position: fixed;
  left: 48%;
  top: 63%;
  text-align: center;
  z-index: 100;
}
.spinner {
  display: block;
  left: 50%;
  top: 50%;
  width: 100px;
  z-index: 100;
  position: fixed;
/*  left: 50;
  top: 50vh;*/
}
.spinner .spinner-ball {
  height: 14.2857142857px;
  width: 14.2857142857px;
  background-color: black;
  display: block;
  border-radius: 50%;
  position: fixed;
  top: 50%;
  left: 50%;
}
.spinner .spinner-ball:nth-child(1) {
  transform: rotate(0deg) translate(50px) rotate(0deg);
  animation: slide 1s ease-in -0.2s infinite alternate;
  background-color: transparent;
}
@keyframes slide {
  from {
    transform: translate(100);
  }
  to {
    transform: translate(0);
  }
}
.spinner .spinner-ball:nth-child(2) {
  transform: rotate(51.4285714286deg) translate(50px) rotate(-51.4285714286deg);
  animation: slide 1s ease-in -0.4s infinite alternate;
  background-color: transparent;
}
@keyframes slide {
  from {
    transform: translate(100);
  }
  to {
    transform: translate(0);
  }
}
.spinner .spinner-ball:nth-child(3) {
  transform: rotate(102.8571428571deg) translate(50px) rotate(-102.8571428571deg);
  animation: slide 1s ease-in -0.6s infinite alternate;
  background-color: transparent;
}
@keyframes slide {
  from {
    transform: translate(100);
  }
  to {
    transform: translate(0);
  }
}
.spinner .spinner-ball:nth-child(4) {
  transform: rotate(154.2857142857deg) translate(50px) rotate(-154.2857142857deg);
  animation: slide 1s ease-in -0.8s infinite alternate;
  background-color: transparent;
}
@keyframes slide {
  from {
    transform: translate(100);
  }
  to {
    transform: translate(0);
  }
}
.spinner .spinner-ball:nth-child(5) {
  transform: rotate(205.7142857143deg) translate(50px) rotate(-205.7142857143deg);
  animation: slide 1s ease-in -1s infinite alternate;
  background-color: transparent;
}
@keyframes slide {
  from {
    transform: translate(100);
  }
  to {
    transform: translate(0);
  }
}
.spinner .spinner-ball:nth-child(6) {
  transform: rotate(257.1428571429deg) translate(50px) rotate(-257.1428571429deg);
  animation: slide 1s ease-in -1.2s infinite alternate;
  background-color: transparent;
}
@keyframes slide {
  from {
    transform: translate(100);
  }
  to {
    transform: translate(0);
  }
}
.spinner .spinner-ball:nth-child(7) {
  transform: rotate(308.5714285714deg) translate(50px) rotate(-308.5714285714deg);
  animation: slide 1s ease-in -1.4s infinite alternate;
  background-color: transparent;
}
@keyframes slide {
  from {
    transform: translate(100);
  }
  to {
    transform: translate(0);
  }
}