.api-panel:hover .copy_button {
    display: block;
}

.api-panel .copy_button {
    display: none;
}
table 
        {
            column-width: 100%;
            font: 16px;
        }
        table, th, td 
        {
            border: solid 1px #DDD;
            border-collapse: collapse;
            padding: 10px 30px;
            text-align: center;
        }

.green {
    border-left: 4px solid #18a668;
    background-color: transparent;
    clear: both;
    padding: 15px !important;
    margin: 10px 0px 20px;
}