html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: #000;
  overflow: hidden;
  cursor: none;
}

#stack {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
}

.slide {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  opacity: 0;
  -webkit-transition: opacity 1s ease-in-out;
  transition: opacity 1s ease-in-out;
}

.slide.on { opacity: 1; }

.bg {
  position: absolute;
  top: -6%; left: -6%;
  width: 112%; height: 112%;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  -webkit-filter: blur(38px) brightness(0.45);
  filter: blur(38px) brightness(0.45);
}

.frame {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
}

.frame img {
  display: block;
  max-width: 100%;
  max-height: 100%;
  -o-object-fit: contain;
  object-fit: contain;
}

.frame.pair { padding: 0 2vw; }

.frame.pair img {
  max-width: 47%;
  max-height: 96%;
  margin: 0 1.5vw;
}

#notice {
  position: absolute;
  left: 0; right: 0;
  top: 44%;
  color: #cfcfcf;
  font-family: Helvetica, Arial, sans-serif;
  font-size: 22px;
  line-height: 1.6;
  text-align: center;
  padding: 0 8%;
}

#notice span {
  display: block;
  color: #7a7a7a;
  font-size: 17px;
  margin-top: 10px;
}

.hidden { display: none; }

#label {
  position: absolute;
  left: 3.2vw;
  bottom: 3.2vh;
  color: #fff;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 3.2vh;
  letter-spacing: 0.06em;
  text-shadow: 0 1px 14px rgba(0,0,0,0.85), 0 0 4px rgba(0,0,0,0.7);
  pointer-events: none;
  opacity: 0;
  -webkit-transition: opacity 1.2s ease-in-out;
  transition: opacity 1.2s ease-in-out;
}

#label.on { opacity: 0.92; }

#keepalive {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 4px;
  height: 4px;
  opacity: 0.01;
  pointer-events: none;
  z-index: 1;
}