body.program {
    background-color: darkcyan;
}
h2.program {
    color: black;
    text-decoration: underline;
}
div.program {
    position: relative;
    width: 75%;
    margin: 0 auto;
    color: white;
    text-align: center;
}
button.copy_button {
    position: absolute;
    right: 0;
    font-size: 2rem;
    background-color: blue;
    z-index: 100;
    cursor: pointer;
    -webkit-user-select: none;
    user-select: none;
}
pre.program {
    font-size: 1.5rem;
    background-color: black;
    color: yellow;
    text-align: left;
    margin: 0 auto;
    width: 100%;
    overflow-x: auto;
}
a.back_button {
    font-size: 3rem;
    margin: 0 auto;
    padding-bottom: 8rem;
}