body {
    margin: 0;
    padding: 0;
    background-color: black;
    color: lime;
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
}

header {
    display: flex;
    justify-content: center;
    align-items: center;
    /* margin-top: 50px; */
}