Вы можете сделать это с помощью Flexbox :
body, hr {margin: 0}
.homescreen-content {
display: flex; /* displays flex-items (children) inline */
flex-direction: column; /* stacks them vertically */
height: 100vh; /* 100% of the viewport height */
}
.homescreen-content > div {
display: flex;
justify-content: center; /* horizontally centered */
align-items: center; /* vertically centered */
flex: 1; /* each stretches and takes equal height of the parent (50vh) */
}
<div class="homescreen-content" scroll="false">
<div>ITEM 1</div>
<hr>
<div>ITEM 2</div>
</div>