style.css

body, html {
    height: 100%;
    margin: 0;
}

.bg {
    /*(c) Diliff on Wikimedia Commons: https://commons.wikimedia.org/wiki/File:London_Waterloo_Interior_Rush_Hour_2,_London,_UK_-_Diliff.jpg*/
    background-image: url("rush_hour.jpg");
    height: 100%;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    position: relative;
    text-align: center;
}

#button {
    font-size: 80px;
    text-decoration: none;
    justify-content: center;
    display: flex;
    position: absolute;
    right: 1.25em;
    bottom: 0.75em;
}

#button2 {
    font-size: 20px;
    text-decoration: none;
    justify-content: center;
    display: flex;
    position: absolute;
    right: 1.25em;
    bottom: 5em;
}

.box {
    width: 100%;
    display: flex;
    justify-content: space-around;
}

#lastscreen img {
    width: 42.55%;
    position: absolute;
    left: 0em;
}

#lastscreen_t {
    width: 42.55%;
    position: absolute;
    left: 20em;
    top: 8em;
    font-style: italic;
    font-size: 40px;
}

#middle img, #right img {
    width: 100%;
}

#middle, #right {
    width: 49%;
}

#middle2 img, #right2 img {
    width: 100%;
}

#middle2 {
    width: 30%;
}

#right2 {
    width: 60%;
}

#middle3 img, #right3 img {
    width: 100%;
}

#middle3 {
    width: 45%;
}

#right3 {
    width: 30%;
}


#theme {
    margin-top: 100px;
    margin-bottom: 70px;
    text-align: center;
}

p {
    font-size: 30px;
    font-family: Arial, Helvetica, sans-serif;

}