body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #000;
    color: #fff;
    font-family: "Segoe UI", Arial, sans-serif;
}

#msg {
    font-size: 3rem;
    text-align: center;
    padding: 20px;
}