a.anchor {
    font-size: 15px;
    vertical-align: middle;
    color: darkblue;
    display: inline-block;
    padding-bottom: 5px;
    margin-right: 5px;
    opacity: 0;
    transition: opacity 0.4s;
}
h2:hover a.anchor,
h3:hover a.anchor,
h4:hover a.anchor {
    opacity: 1;
}

summary {
    position: relative;
    padding-left: 60px;
    padding-right: 50px;
    margin-bottom: 15px;
    font-size: 15px;
}

summary .clipboard-single,
summary .clipboard-multiple {
    right: 0;
    position: absolute;
    cursor: pointer;
    font-size: 14px;
    color: #606c71;
}