body {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  width: 100vw;
  min-height: 100vh;
}
body * {
  box-sizing: inherit;
}

#app {
  width: 100%;
  height: 100%;
  background: #000;
}

.group {
  background: #000;
  position: absolute;
  height: 100%;
  width: 100%;
  top: 0;
  display: flex;
  overflow: hidden;
}
.group .wrap {
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
  width: 100%;
  margin-right: -100%;
  position: relative;
}
.group .wrap span {
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 30rem;
  z-index: 2;
  opacity: 0.4;
  text-shadow: 0 5px 50px black;
  pointer-events: none;
}
.group .wrap img {
  height: 100%;
  width: 100%;
  -o-object-fit: cover;
     object-fit: cover;
  display: block;
  pointer-events: none;
}

.nav {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
}
.nav .arrow {
  z-index: 100;
  font-size: 3rem;
  padding: 20px;
  background: rgba(0, 0, 0, 0.7);
  border-radius: 4rem;
  color: white;
}
.nav .arrow > span {
  pointer-events: none;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
}

.wrap {
  opacity: 0;
  filter: grayscale(100%);
  transform: translateX(-100%) scale(0.8);
}

[data-active] ~ .wrap {
  transform: translateX(100%) scale(0.2);
}

[data-active] {
  filter: grayscale(0%);
  opacity: 1;
  transform: translateX(0%) scale(1);
}

*, *:before, *:after {
  box-sizing: border-box;
  transition-property: transform, opacity, filter;
  transition-duration: 0.7s, 0.7s, 0.7s;
  transition-timing-function: cubic-bezier(0.5, 0, 0.5, 1);
}