.modal {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0,0,0,0.8);
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  z-index: -9999999;
  transition: opacity 0.2s cubic-bezier(0,0,1,1);
}
.modal.visible {
  opacity: 1;
  pointer-events: auto;
  z-index: 999999999;
}
.modal .inner {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
.modal img {
  max-width: 90vw;
  max-height: 90vh;
}
.modal .caption {
  display: block;
  text-align: center;
}
.modal .prev {
  position: absolute;
  top: 0; left: 0;
  width: 10%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  font-size: 40px;
  cursor: pointer;
}
.modal .next {
  position: absolute;
  top: 0; right: 0;
  width: 10%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  font-size: 40px;
  cursor: pointer;
}
.modal .close {
  position: absolute;
  top: 0; right: 0;
  width: 10vw; height: 10vw;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  font-size: 40px;
  cursor: pointer;
}