:root{

}

.text-menu{
    position: absolute;
    left: 0px;
    top:0px; 
    border-radius:10px;
    margin:10px;
    width:30%;
    height:calc(100% - 20px);
    background-color:rgba(0,0,0,0.45);
    padding: 10px 10px;
    color:white
}