html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: black;
}

.container {
    position: fixed;
    inset: 0;
}

.image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    cursor: pointer;
    transition: opacity 5s ease;
}

#image2 {
    opacity: 0;
}

.show-second #image1 {
    opacity: 0;
}

.show-second #image2 {
    opacity: 1;
}