body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #222;
    font-family: Arial, sans-serif;
    color: #fff;
}

h1 {
    font-size: 3em;
    animation: fadeIn 2s ease-in-out;
}

@keyframes fadeIn {
    0% { opacity: 0; }
    100% { opacity: 1; }
}