html {
  box-sizing: border-box;
}

*,
*:before,
*:after {
  box-sizing: inherit;
  margin: 0;
  padding: 0;
}

.cont {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-image: linear-gradient(to left bottom, #F2E3C6 0%, #A7A1A5 100%);
  overflow: hidden;
}

.app {
  position: relative;
  min-width: 850px;
  height: 540px;
  box-shadow: 0 0 60px rgba(0, 0, 0, 0.3);
  overflow: hidden;
}
.app__bgimg {
  position: absolute;
  top: 0;
  left: -2.5%;
  width: 105%;
  height: 100%;
  transition: transform 3.5s 770ms;
}
.app__bgimg-image {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
}
.app__bgimg-image--1 {
  background: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/537051/city22222.jpg") center center no-repeat;
  background-size: cover;
}
.app__bgimg-image--2 {
  background: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/537051/forest.jpg") center center no-repeat;
  background-size: cover;
  opacity: 0;
  transition: opacity 0ms 1300ms;
  will-change: opacity;
}
.app__text {
  position: absolute;
  right: 165px;
  top: 150px;
  font-family: "Roboto", sans-serif;
  text-transform: uppercase;
  z-index: 1;
}
.app__text-line {
  transition: transform 1500ms 400ms, opacity 750ms 500ms;
  will-change: transform, opacity;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
}
.app__text-line--4 {
  transition: transform 1500ms 1500ms, opacity 1500ms 1500ms;
}
.app__text-line--3 {
  transition: transform 1500ms 1600ms, opacity 1500ms 1750ms;
}
.app__text-line--2 {
  transition: transform 1500ms 1700ms, opacity 1500ms 2000ms;
}
.app__text-line--1 {
  transition: transform 1500ms 1800ms, opacity 1500ms 2250ms;
}
.app__text-line--4 {
  font-size: 50px;
  font-weight: 700;
  color: #0A101D;
}
.app__text-line--3 {
  font-size: 40px;
  font-weight: 300;
}
.app__text-line--2 {
  margin-top: 10px;
  font-size: 14px;
  font-weight: 500;
  color: #0099CC;
}
.app__text-line--1 {
  margin-top: 15px;
}
.app__text-line--1 img {
  width: 50px;
}
.app__text--1 .app__text-line {
  transform: translate3d(0, -125px, 0);
  opacity: 0;
}
.app__text--2 {
  right: initial;
  top: 250px;
  left: 80px;
  z-index: -1;
  transition: z-index 1500ms;
}
.app__text--2 .app__text-line--4 {
  opacity: 0;
  transition: transform 1500ms -75ms, opacity 400ms 125ms;
}
.app__text--2 .app__text-line--3 {
  opacity: 0;
  transition: transform 1500ms 0ms, opacity 400ms 200ms;
}
.app__text--2 .app__text-line--2 {
  opacity: 0;
  transition: transform 1500ms 75ms, opacity 400ms 275ms;
}
.app__text--2 .app__text-line--1 {
  opacity: 0;
  transition: transform 1500ms 150ms, opacity 400ms 350ms;
}
.app__img {
  position: absolute;
  transform: translate3d(0, -750px, 0);
  width: 850px;
  height: 100%;
  transition: transform 3s cubic-bezier(0.6, 0.13, 0.31, 1.02);
  will-change: transform;
}
.app__img img {
  min-width: 100%;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
}

.initial .app__img {
  transform: translate3d(0, 0, 0);
}
.initial .app__text--1 .app__text-line--1 {
  transform: translate3d(0, 0, 0);
  transition: transform 1500ms 1400ms, opacity 400ms 1600ms;
  opacity: 1;
}
.initial .app__text--1 .app__text-line--2 {
  transform: translate3d(0, 0, 0);
  transition: transform 1500ms 1475ms, opacity 400ms 1675ms;
  opacity: 1;
}
.initial .app__text--1 .app__text-line--3 {
  transform: translate3d(0, 0, 0);
  transition: transform 1500ms 1550ms, opacity 400ms 1750ms;
  opacity: 1;
}
.initial .app__text--1 .app__text-line--4 {
  transform: translate3d(0, 0, 0);
  transition: transform 1500ms 1625ms, opacity 400ms 1825ms;
  opacity: 1;
}

.active .app__bgimg {
  transform: translate3d(10px, 0, 0) scale(1.05);
  transition: transform 5s 850ms ease-in-out;
}
.active .app__bgimg .app__bgimg-image--2 {
  opacity: 1;
  transition: opacity 0ms 1500ms;
}
.active .app__img {
  transition: transform 3s cubic-bezier(0.6, 0.13, 0.31, 1.02);
  transform: translate3d(0, -1410px, 0);
}
.active .app__text--1 {
  z-index: -1;
  transition: z-index 0ms 1500ms;
}
.active .app__text--1 .app__text-line--1 {
  transform: translate3d(0, -125px, 0);
  transition: transform 1500ms 300ms, opacity 400ms 500ms;
  opacity: 0;
}
.active .app__text--1 .app__text-line--2 {
  transform: translate3d(0, -125px, 0);
  transition: transform 1500ms 375ms, opacity 400ms 575ms;
  opacity: 0;
}
.active .app__text--1 .app__text-line--3 {
  transform: translate3d(0, -125px, 0);
  transition: transform 1500ms 450ms, opacity 400ms 650ms;
  opacity: 0;
}
.active .app__text--1 .app__text-line--4 {
  transform: translate3d(0, -125px, 0);
  transition: transform 1500ms 525ms, opacity 400ms 725ms;
  opacity: 0;
}
.active .app__text--2 {
  z-index: 1;
}
.active .app__text--2 .app__text-line--1 {
  transform: translate3d(0, -125px, 0);
  transition: transform 2500ms 1100ms, opacity 1300ms 1300ms;
  opacity: 1;
}
.active .app__text--2 .app__text-line--2 {
  transform: translate3d(0, -125px, 0);
  transition: transform 2500ms 1175ms, opacity 1300ms 1575ms;
  opacity: 1;
}
.active .app__text--2 .app__text-line--3 {
  transform: translate3d(0, -125px, 0);
  transition: transform 2500ms 1250ms, opacity 1300ms 1850ms;
  opacity: 1;
}
.active .app__text--2 .app__text-line--4 {
  transform: translate3d(0, -125px, 0);
  transition: transform 2500ms 1325ms, opacity 1300ms 2125ms;
  opacity: 1;
}

.mouse {
  position: relative;
  margin-right: 20px;
  min-width: 50px;
  height: 80px;
  border-radius: 30px;
  border: 5px solid rgba(255, 255, 255, 0.8);
}
.mouse:after {
  content: "";
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translate(-50%, 0);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #fff;
  -webkit-animation: scroll 1s infinite alternate;
          animation: scroll 1s infinite alternate;
}
@-webkit-keyframes scroll {
  100% {
    transform: translate(-50%, 15px);
  }
}
@keyframes scroll {
  100% {
    transform: translate(-50%, 15px);
  }
}

.pages {
  margin-left: 20px;
}
.pages__list {
  list-style-type: none;
}
.pages__item {
  position: relative;
  margin-bottom: 10px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 3px solid #fff;
  cursor: pointer;
}
.pages__item:after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0, 0);
  width: 75%;
  height: 75%;
  border-radius: 50%;
  background-color: #fff;
  opacity: 0;
  transition: 500ms;
}
.pages__item:hover:after {
  transform: translate(-50%, -50%) scale(1, 1);
  opacity: 1;
}

.page__item-active:after {
  transform: translate(-50%, -50%) scale(1, 1);
  opacity: 1;
}

.icon-link {
  position: absolute;
  left: 5px;
  bottom: 5px;
  width: 50px;
}
.icon-link img {
  width: 100%;
  vertical-align: top;
}
.icon-link--twitter {
  left: auto;
  right: 5px;
}