* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    height: 100%;
    background-color: #000000;
    color: #ffffff;
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
}

.message {
    font-size: 2em;
}

@media (max-width: 600px) {
    .message {
        font-size: 1.5em;
    }
}