.ack {
  position: fixed;
  height: 100%;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 6;
  opacity: 1;
  transition: height 1000ms;
  cursor: pointer;
  background: #fff;
  color: #fff;
  overflow: hidden;
}

.ack.inactive {
  height: 0;
  pointer-events: none;
}


.ack .ack_inner {
  position: absolute;
  bottom: 0;
  height: 100%;
  box-sizing: border-box; 
  width: 100%;
  left: 0;
  text-align: left;
  pointer-events: none;
}

.ack .close_button {
  cursor: pointer;
  position: absolute;
  right: 2rem;
  bottom: 2rem;
  z-index: 3;
}

.ack .close_button:hover {
  opacity: 0.8;
}

.ack .close_button:after {
    display: inline-block;
    width: 0.58em;
    height: 0.58em;
    content: " ";
    margin-left: 0.2rem;
    background: url(./images/navigate_right.svg) 50%/contain no-repeat;
}

.ack .lines {
  position: absolute;
  top: 0;
  left: 0;
  padding: 2rem;
}

.ack .line {
  opacity: 0;
  transition: opacity 1000ms;
}

.ack .lines.active .line {
  opacity: 1;
}

.ack .ack_language {
}


.ack .mobile {
  display: none;
}

@media (min-width: 450px) and (max-width: 768px) {
  .ack .mobile {
    font-size: 24px;
  }
}

.ack .tablet {
  display: none;
}

@media (max-width: 1023px) {
  .ack .tablet {
    display: block;
  }
  .ack .desktop {
    display: none;
  }
}

@media (max-width: 768px) {
  .ack .mobile {
    display: block;
  }
  .ack .tablet {
    display: none;
  }
}

.ack .ack_video {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0;
  transition: opacity 1000ms;
}

.ack .ack_video.loaded {
  opacity: 1;
}

/*
 * audio button
 */
.ack .audio_button {
  position: absolute;
  left: 2rem;
  bottom: 2rem;
  opacity: 0.655;
  mix-blend-mode: screen;
}

.ack .audio_button:hover {
  opacity: 0.8;
}

.ack .audio_button.active {
  opacity: 1;
}

.ack .audio_button_gif {
  display: block;
  opacity: 0.655;
  margin-left: -0.65rem;
}