style.css

@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');

* {
   box-sizing: border-box;
}

body {
   background-color: #efedd6;
   font-family: 'Roboto', sans-serif;
   display: flex;
   flex-direction: column;
   align-items: center;
   justify-content: center;
   margin: 0;
   overflow-x: hidden;
}

h1 {
   margin: 10px;
}

.box {
   background-color: steelblue;
   color: #fff;
   display: flex;
   align-items: center;
   justify-content: center;
   width: 400px;
   height: 200px;
   margin: 10px;
   border-radius: 10px;
   box-shadow: 2px 4px 5px rgba(0, 0, 0, 0.3);
   transform: translateX(400%);
   transition: transform 0.4s ease;
}

.box:nth-of-type(even) {
   transform: translateX(-400%);
}

.box.show {
   transform: translateX(0);
}

.box h2 {
   font-size: 45px;
}

/* Developed By Mohammad Kiaei  */