@import url("https://fonts.googleapis.com/css?family=Poppins:200,300,400,500,600,700,800,900&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}

body {
  overflow-x: hidden;
}

section {
  padding: 100px;
  height: 100vh;
}

header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100px;
  padding: 20px 100px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
}

header .logo {
  position: relative;
  font-size: 28px;
  color: #111;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 700;
  opacity: 0;
  animation: slideLeft 0.5s ease-in-out forwards;
}

header .toggle {
  position: relative;
  width: 30px;
  height: 30px;
  background: url(menu.png);
  background-size: 30px;
  background-position: center;
  background-repeat: no-repeat;
  cursor: pointer;
  z-index: 10000;
  opacity: 0;
  animation: slideRight 0.5s ease-in-out forwards;
  animation-delay: 0.5s;
}

header .toggle.active {
  background: url(close.png);
  background-size: 25px;
  background-position: center;
  background-repeat: no-repeat;
}

.navigation {
  position: absolute;
  display: flex;
  right: 150px;
  opacity: 0;
  visibility: hidden;
  transition: 0.5s;
}

.navigation.active {
  opacity: 1;
  visibility: visible;
}

.navigation li {
  list-style: none;
}

.navigation li a {
  color: #111;
  text-decoration: none;
  font-size: 16px;
  margin: 0 20px;
  font-weight: 600;
  display: inline-block;
  opacity: 0;
}

.navigation.active li a {
  animation: slideRight 0.5s ease-in-out forwards;
  animation-delay: calc(0.2s * var(--i));
}

.container {
  position: absolute;
  display: flex;
  height: calc(100% - 200px);
  width: calc(100% - 200px);
  z-index: 100;
}

.container .box {
  position: relative;
  width: 25%;
  height: 100%;
  overflow: hidden;
  border-right: 10px solid #fff;
}

.container .box:last-child {
  border-right: none;
}

.container .box .imgBx {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transition: 0.5s;
  opacity: 0;
  animation: slideRight 0.5s ease-in-out forwards;
  animation-delay: calc(0.2s * var(--i));
}

.container .box .imgBx.active {
  position: fixed;
  top: 100px;
  left: 100px;
  width: calc(100% - 200px);
  height: calc(100% - 200px);
  z-index: 1000;
  opacity: 1;
}

.container .box .imgBx img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: 0.5s;
}

.container .box .imgBx:hover img {
  transform: scale(1.2);
}

.container .box .imgBx.active:hover img {
  transform: scale(1);
}

.footer {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 0 100px;
  height: 100px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer .sci {
  position: relative;
  display: flex;
}

.footer .sci li {
  list-style: none;
}

.footer .sci li a {
  color: #111;
  text-decoration: none;
  font-weight: 500;
  margin-right: 20px;
  display: inline-block;
  opacity: 0;
  animation: slideLeft 0.5s ease-in-out forwards;
  animation-delay: calc(0.2s * var(--i));
}

.footer .sci li:last-child a {
  margin-right: 0;
}

.copyrightText {
  color: #111;
  font-weight: 500;
  opacity: 0;
  animation: slideRight 0.5s ease-in-out forwards;
  animation-delay: 2.5s;
}

/* Now, i'll add animation in this web page */

@keyframes slideRight {
  0% {
    transform: translateX(150px);
    opacity: 0;
  }

  100% {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideLeft {
  0% {
    transform: translateX(-150px);
    opacity: 0;
  }

  100% {
    transform: translateX(0);
    opacity: 1;
  }
}

@media (max-width: 768px) {
  section {
    padding: 80px 20px;
  }

  header {
    padding: 10px 20px;
    height: 70px;
  }

  .navigation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
  }

  .navigation.active li a {
    margin: 5px 10px;
    display: inline-block;
    letter-spacing: 1px;
    font-size: 20px;
  }

  .container {
    flex-direction: column;
    flex-wrap: wrap;
    width: calc(100% - 30px);
    height: calc((100% - 170px));
  }
  .container .box {
    width: 100%;
    height: 25%;
    border-bottom: 10px solid #fff;
  }
  .container .box:last-child {
    border-right: 10px solid #fff;
  }
  .container .box .imgBx.active {
    top: 70px;
    left: 20px;
    width: calc(100% - 40px);
    height: calc(100% - 160px);
  }
  .footer {
    widows: 100%;
    padding: 0 20px;
    flex-direction: column;
    justify-content: center;
  }
}