body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
}

main {
    position: relative;
    z-index: 1;
    background-color: white;
    padding: 40px 20px;
}

.slider .fixed-image {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: -1;
    will-change: transform;
}

.slider .fixed-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    opacity: 0;
}