body, html {
    height: 100%;
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: black;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    text-align: center;
}

.coming-soon {
    font-size: 4em;
    color: transparent;
    -webkit-background-clip: text;
    background-clip: text;
    background-image: linear-gradient(to right, red, orange, yellow, green, blue, indigo, violet);
}

@media only screen and (max-width: 600px) {
    .coming-soon {
        font-size: 2em;
    }
}