body {
  font-family: 'Slabo 27px';
}
.name {
  text-align: center;
}

.thumb {
  margin: auto;
  text-align: center;
}

.thumb img {
  width: 140px;
  height: 140px;
  margin: 30px 0;
  background: black;
}

.popup {
  width: 80%;
  height: 80%;
  text-align: center;
  margin: 10% auto;
}

.popup img {
  background: white;
  height: 100%;
  width: 100%;
}

.active-image {
  display: block;
}

.overlay {
  display: none;
  height: 100vh;
  width: 100vw;
  background: rgba(0, 0, 0, 0.91);
  position: fixed;
  z-index: 1000;
}

.details {
  margin-top: -100px;
  text-align: left;
}

.back {
  text-align: left;
  position: absolute;
  float: left;
  top: 50%;
  left: 11%;
  font-size: 30px;
}

.next {
  text-align: right;
  position: absolute;
  float: right;
  top: 50%;
  right: 11%;
  font-size: 30px;

}

#back, #next {
  text-decoration: none;
  color: black;
}

#back:hover, #next:hover {
  color: grey;
}


@media (max-width: 768px) {

  .back, .next {
    top: 40%;
  }

}