index.css

@font-face {
    font-family: "Nimbus";
    src: url("nimbus.woff") format("otf"),
}

body.black {
    background-color: black;
}
body.black .text {
    color: white;
}

body.white {
    background-color: white;
}
body.white .text {
    color: black;
}
body{
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    font-family: 'Harabara Bold', Arial, sans-serif;
    transition-property: background-color;
    transition-duration: 500ms
}
.text{
    font-size: 10em;
    font-weight: bold;
}
.img {
    opacity: 1;
}
.img.appear{
    opacity: 1;
    /* transition-property: opacity;
    transition-duration: 500ms */
}

.marquee {
    width: 100%;
    box-sizing: border-box;
    margin-top: 100px;
}

.marquee.zoom {
    animation-name: zoom;
    animation-duration: 100ms
}

.marquee.dezoom {
    animation-name: dezoom;
    animation-duration: 100ms
}

.marquee img {
    display: inline-block;
    padding-left: 100%;
    animation: marquee 15s linear infinite;
}
@keyframes marquee {
    0% {
        transform: translate(-100%, 0);
    }
    100% {
        transform: translate(0, 0);
    }
}
@keyframes zoom {
    0% {
        transform: scale(1);
    }

    100% {
        transform: scale(1.1);
    }
}

@keyframes dezoom {
    0% {
        transform: scale(1.1);
    }
    
    100% {
        transform: scale(1);
    }
}