@font-face {
  src: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/142996/PFSquareSansPro-Medium.otf");
  font-family: pfs-medium;
}
@font-face {
  src: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/142996/decade.ttf");
  font-family: decade;
}
*, *:before, *:after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  position: relative;
  z-index: 10;
  background-image: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/142996/sections-bg.jpg");
  background-size: cover;
  font-family: pfs-medium;
}
body:after {
  content: "";
  position: absolute;
  display: block;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  z-index: -10;
}

.container {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 40rem;
  height: 150%;
  font-size: 0;
  z-index: 15;
  transform: translate3d(-50%, -50%, 0) rotate(-10deg);
  transition: transform 1s, width 1s, height 1s;
  will-change: transform, width, height;
}
.container.ready .section {
  transform: translate3d(0, 0, 0);
}
.container.phase-2 .section {
  transition-delay: 0s;
}
.container.phase-2 .section:after {
  background-color: rgba(0, 0, 0, 0.4);
}
.container.phase-2 .section:hover:after {
  background-color: transparent;
}
.container.phase-2 .section.sec-1:hover .letter {
  color: #ec5362;
}
.container.phase-2 .section.sec-2:hover .letter {
  color: #1B5469;
}
.container.phase-2 .section.sec-3:hover .letter {
  color: #759e3b;
}
.container.phase-2 .section.sec-4:hover .letter {
  color: #7C3486;
}
.container.phase-2 .word {
  opacity: 1;
}
.container.active {
  width: 100%;
  height: 100%;
  transform: translate3d(-50%, -50%, 0);
}
.container.active .section.active {
  width: calc(100% - 30rem);
  cursor: auto;
}
.container.active .section.active .word {
  opacity: 0;
}
.container.active .section.active .inner {
  z-index: -5;
}
.container.active .section.active:after {
  z-index: -3;
}
.container.active .section.active:hover:after {
  background-color: rgba(0, 0, 0, 0.4);
}
.container.active .section.active .close-btn {
  opacity: 1;
  z-index: 100;
}
.container.active .section.active .text {
  opacity: 1;
  z-index: 50;
  transition-delay: 1s;
}
.container.active .section:not(.active) .word .letter {
  transform: translate3d(0, 0, 0) rotate(0deg);
}

.section {
  position: relative;
  display: inline-block;
  width: 10rem;
  height: 100%;
  background: #fff;
  overflow: hidden;
  z-index: 20;
  transition: transform 1s, width 1s;
  cursor: pointer;
}
.section:nth-child(even) {
  transform: translate3d(0, 100%, 0);
}
.section:nth-child(odd) {
  transform: translate3d(0, -100%, 0);
}
.section.sec-1 .inner {
  background-image: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/142996/sections-1.jpg");
}
.section.sec-2 {
  transition-delay: 0.5s;
}
.section.sec-2 .inner {
  background-image: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/142996/sections-2.jpg");
}
.section.sec-3 {
  transition-delay: 1s;
}
.section.sec-3 .inner {
  background-image: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/142996/sections-3.jpg");
}
.section.sec-4 {
  transition-delay: 1.5s;
}
.section.sec-4 .inner {
  background-image: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/142996/sections-4.jpg");
}
.section:after {
  content: "";
  position: absolute;
  display: block;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transition: background-color 0.5s;
  will-change: background-color;
}
.section .close-btn {
  position: absolute;
  top: -0.5rem;
  right: 1.1rem;
  opacity: 0;
  z-index: -100;
  transition: z-index 0.5s, opacity 0.5s, color 0.5s, transform 0.5s;
  will-change: opacity, color;
  transform: rotate(45deg);
  color: #fff;
  font-size: 5rem;
  cursor: pointer;
}
.section .close-btn:hover {
  color: red;
  transform: rotate(225deg);
}
.section .text {
  height: 100%;
  color: #fff;
  padding: 3rem;
  opacity: 0;
  font-size: 3rem;
  transition: opacity 0.5s, z-index 0.5s;
  will-change: opacity;
  z-index: -150;
  overflow-y: auto;
}

.inner {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
}

.word {
  position: absolute;
  z-index: 50;
  top: 50%;
  left: 50%;
  opacity: 0;
  transform: translateX(-50%) translateY(-50%);
  transition: opacity 0.5s;
  will-change: opacity;
}
.word .letter {
  color: #fff;
  font-size: 4rem;
  text-transform: uppercase;
  transform: rotate(10deg);
  transition: color 0.5s, transform 0.5s;
  will-change: transform, color;
  font-family: decade;
}