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


main {
    height: 100vh;
    width: 100vw;
}


.left,
.right {
    display: inline-block;
    height: 100%;
    width: 50%;
    border: 1px solid black;
    background-repeat: no-repeat;
    background-size: cover;
    position: relative;
}

.left {
    background-image: url(https://static.nike.com/a/images/f_auto/dpr_1.0,cs_srgb/w_451,c_limit/a51d84b2-282a-44d6-957d-aa57473ed73d/nike-just-do-it.jpg);
}

.right {
    background-image: url(https://static.nike.com/a/images/f_auto/dpr_1.0,cs_srgb/w_451,c_limit/0376dfa6-a2d7-4867-bd13-4b8e465705c1/nike-just-do-it.jpg);
}

p {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 50px;
}