body {
    background-image: url('cat.gif'),url('beans.jpg');
    background-position: center, center;
    background-size: 300px 400px, cover;
    background-color: #333;
    display: flex;
    flex-direction: column;
    align-items: center; /* Centre horizontally */
    justify-content: flex-start; /* Align to the top */
    height: 100%;
    margin: 0; /* Remove default margin */
    padding-top: 70px;
}

.rainbowText {
    font-family: 'Arial Black', sans-serif; /* Added fallback */
    font-size: 7vw;
    background-image: linear-gradient(
        to right,
        red,
        orange,
        yellow,
        green,
        blue,
        indigo,
        violet
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: move 85s linear infinite;
    margin-top: 5vh;
}

@keyframes move {
    to {
        background-position: 4500vh;
    }
}