.copy-button {
    position: absolute;
    right: 0;
    top: 0;
    border: none;
    background: #fbfbfb;
    color: #949494;
    padding: 5px 10px;
    cursor: pointer;
    font-size: 12px;
    border-radius: 3px;
}

.copy-button:hover {
    background: #666666;
    color :#ffffff;
}

pre {
    position: relative;
}