The CSS for the Theater v0.12 demo.

theater-012-demo.css

.wpt_listing .wp_theatre_event .theater-012-demo {
  position: relative;
  margin: 0;
}
.wpt_listing .wp_theatre_event .theater-012-demo .event-info {
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.2);
  color: #fff;
  width: 100%;
  padding: 10px;
}
.wpt_listing .wp_theatre_event .theater-012-demo .event-info a {
  color: inherit;
  text-decoration: none;
}
.wpt_listing .wp_theatre_event .theater-012-demo figure {
  width: 100%;
  padding: 0 !important;
  float: none;
}
.wpt_listing .wp_theatre_event .theater-012-demo figure + .event-info {
  position: absolute;
}
.wpt_listing .wp_theatre_event .theater-012-demo figure img {
  width: 100%;
  padding: 0 !important;
}