.pswp__custom-caption {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  padding: 12px 16px;
  box-sizing: border-box;
  color: #fff;
  font-size: 14px;
  line-height: 1.5;
  text-align: center;
  background: rgba(0, 0, 0, 0.55);
  pointer-events: none;
  z-index: 10;
}

.pswp__custom-caption[hidden] {
  display: none;
}