details {
    /* color: #2980B9; */
    background: #fbfbfb;
    border: 1px solid  #c9c9c9;
    border-radius: 3px;
    padding:  0.25em;
    margin-bottom: 1.0em;
    pre.src {
        border: 0;
        background: none;
        margin: 0;
    }
    pre.src-lisp::before { content: ""; }
}


summary {
    outline: 0;
    color: #c9c9c9;
    &::after {
        font-size: 0.85em;
        color: #c9c9c9;
        display: inline-block;
        float: right;
        content: "Click to fold/unfold";
        padding-right:  0.5em;
    }
}