div.code-toolbar {
    position: relative;
}

div.code-toolbar > .toolbar {
    position: absolute;
    z-index: 10;
    top: .3em;
    right: .2em;
    transition: opacity 0.3s ease-in-out;
    opacity: 0;
}

div.code-toolbar:hover > .toolbar {
    opacity: 1;
}

/* Separate line b/c rules are thrown out if selector is invalid.
   IE11 and old Edge versions don't support :focus-within. */
div.code-toolbar:focus-within > .toolbar {
    opacity: 1;
}

div.code-toolbar > .toolbar > .toolbar-item {
    display: inline-block;
}

div.code-toolbar > .toolbar > .toolbar-item > a {
    cursor: pointer;
}

div.code-toolbar > .toolbar > .toolbar-item > button {
    background: none;
    border: 0;
    color: inherit;
    font: inherit;
    line-height: normal;
    overflow: visible;
    padding: 0;
    -webkit-user-select: none; /* for button */
    -moz-user-select: none;
    -ms-user-select: none;
}

div.code-toolbar > .toolbar > .toolbar-item > a,
div.code-toolbar > .toolbar > .toolbar-item > button,
div.code-toolbar > .toolbar > .toolbar-item > span {
    color: #bbb;
    font-size: .8em;
    padding: 0 .5em;
    background: #f5f2f0;
    background: rgba(224, 224, 224, 0.2);
    box-shadow: 0 2px 0 0 rgba(0, 0, 0, 0.2);
    border-radius: .5em;
}

div.code-toolbar > .toolbar > .toolbar-item > a:hover,
div.code-toolbar > .toolbar > .toolbar-item > a:focus,
div.code-toolbar > .toolbar > .toolbar-item > button:hover,
div.code-toolbar > .toolbar > .toolbar-item > button:focus,
div.code-toolbar > .toolbar > .toolbar-item > span:hover,
div.code-toolbar > .toolbar > .toolbar-item > span:focus {
    color: inherit;
    text-decoration: none;
}