body {
    font-family: sans-serif;
}

.out-in {
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.out {
    display: block;
    height: 80vh;
    border: 1px solid black;
    overflow-y: auto;
}

.byte {
    margin-right: 0.6em;
}

:focus .byte .cursor {
    background-color: blue;
    color: white;
}