#customize-control-clpt_custom_css .customize-control-title {
    display: none;
}
#customize-control-clpt_custom_css {
    margin-left: -12px;
    width: 299px;
    margin-bottom: -12px;
}
#customize-control-clpt_custom_css textarea{
    border-left: 0;
    border-right: 0;
    height: -webkit-calc( 100vh - 285px );
    height: calc( 100vh - 285px );
    resize: none;
}