body {
    margin: 0;
    padding: 0;
    background-color: #000;
    color: #fff;
    font-family: Arial, sans-serif;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}
.center h1 {
    font-size: 2.5em;
    text-align: center;
}