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

* {
  box-sizing: border-box;
  margin: 0;
}

body {
  font-family: 'Roboto', sans-serif;
  overflow-x: hidden;
  background-color: #efedd6;
}

.container {
  width: 100vw;
  overflow-x: hidden;
  padding: 0 10px 100px;
  
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

h1 {
  margin: 20px 0;
}

.box {
  background-color: steelblue;
  color: #fff;
  width: 100%;
  max-width: 400px;
  height: 200px;
  margin: 10px 0;
  border-radius: 10px;
  box-shadow: 2px 4px 5px rgba(0, 0, 0, 0.3);
  position: relative;
  transform: translateX(400%);
  transition: transform .4s ease;
}

/*
 * "even" pega cada elemento par 
 * "odd" pega cada elemento impar
 */
.box:nth-of-type(even) {
  transform: translateX(-400%);
}
/* https://www.w3schools.com/cssref/sel_nth-of-type.asp */

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

.box h2 {
  font-size: 28px;
  position: absolute;
  bottom: 15px;
  left: 15px;
}