code-block-buttons.css

/* source: https://gist.github.com/yangshun/55db997ed0f8f4e6527571fc3bee4675 */
/* "Copy" code block button */
pre {
    position: relative;
}

pre .btnIcon {
    position: absolute;
    top: 4px;
    z-index: 2;
    cursor: pointer;
    border: 1px solid transparent;
    padding: 0;
    color: #1e4562;
    color: rgba(30, 69, 98, 0.5);
    background-color: transparent;
    height: 30px;
    transition: all .25s ease-out;
}

pre .btnIcon:hover {
    text-decoration: none;
}

.btnIcon__body {
    align-items: center;
    display: flex;
}

.btnIcon svg {
    fill: currentColor;
    margin-right: .4em;
}

.btnIcon__label {
    font-size: 11px;
}

.btnClipboard {
    right: 10px;
}