body {
    background-color:slategray;
    color: white;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 4em;
}

div.main-container {
    display:flex;
    justify-content: center;
    align-items: center;
}

.main-text {
    text-transform: uppercase;
    font-size: 2em;
    text-align:center;
    flex-grow:1;
    flex-shrink:0;
}

footer {
    text-align: center;
    padding: 1em 0;
    color: white;
    width: 100%;
    bottom: 0;
}