body {
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: gray;
    background-image: url('https://www.spacejam.com/1996/img/bg_stars.gif');
    font-family: 'Comic Sans MS', 'Arial';
    min-height: 100vh;
    animation: background-move 20s linear infinite;
}

.container {
    border-radius: 25px;
    background-image: url('https://www.w3schools.com/css/paper.gif');
    padding: 2em;
    max-width: 80%;
    max-height: 80%;
    overflow-y: auto;
}

.logo.is-animetion{
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.logo.is-animetion span {
    text-shadow: 9px 8px 15px #000;
    display: inline-block;
    animation: wave-text 1s ease-in-out infinite, wave-background 2s ease-in-out infinite;

    background-image: repeating-linear-gradient(45deg, violet, indigo, blue, green, yellow, orange, red, violet);
    text-align: center;
    background-size: 800% 800%;
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 2em;
    --height: -0.6em;
}

.logo.is-animetion.hosted span {
    font-weight: bold;
    animation: wave-text 1s ease-in-out infinite, wave-background 2s ease-in-out infinite;
    
    background-image: repeating-linear-gradient(45deg, red,rgb(35, 0, 0),red);
    --height: .25em;
}

@keyframes background-move {
    00% {
        background-position: 0% 0%
    }

    100% {
        background-position: 100% 100%
    }
}

@keyframes wave-background {
    00% {
        background-position: 0% 50%
    }

    60% {
        background-position: 100% 25%
    }

    100% {
        background-position: 0% 50%
    }
}

@keyframes wave-text {
    00% {
        transform: translateY(0em);
    }

    60% {
        transform: translateY(var(--height,5em));
    }

    100% {
        transform: translateY(0em);
    }
}