div.theme_text {
    position: absolute;
    bottom: 0;
    text-align: center;
    color: black;
    z-index: 1;
    width: 100%;
    font-weight: bold;
}

div#theme_text_1 {
    padding-bottom: 25px;
    font-size: 25px;
}

div#theme_text_2 {
    padding-bottom: 10px;
    font-size: 15px;
}