* {
  -moz-box-sizing: border-box;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}

section {
  background: #eee;
  max-width: 600px;
  margin: 0 auto;
  padding: 20px;
  overflow: hidden;
}

.module {
  /* width: 48%;
  min-height: 200px;
  background: white;
  position: relative;
  float: left;
  padding: 20px;
  margin-right: 4%;
  margin-bottom: 4%;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2); */
}
.module:nth-child(even) {
  /* margin-right: 0; */
}

.come-in {
  transform: translateY(100px);
  opacity: 0.2;
  animation: come-in 1s ease forwards;

}

.come-in-left {
  transform: translateX(100px);
  opacity: 0.2;
  animation: come-in 1s ease forwards;
  align-items: center;
}

.come-in:nth-child(odd) {
  animation-duration: 1s;
}

.already-visible {
  transform: translateY(0);
  animation: none;
  opacity: 1;
}

@keyframes come-in {
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes come-in-left {
  to {
    transform: translateX(0);
    opacity: 1;
  }
}