#box {
    width: 500px;
    height: 500px;
    border: 1px solid black;
    position: relative;
    background-size: cover;
}
#titleCard {
    text-align: center;
}
#paragraphCard {
    text-align: center;
}
h1 {
    color:blue;
}
h2 {
    color:yellow;
}
h3 {
    color:green;
    font-size: 25px;
}
#paragraphCard {
    position: absolute;
    bottom: 0px;
    width: 100%;
}