.alerts{
    position:fixed;
    bottom:5px;
    width:275px;
    padding: 5px;
    left:-300px;
    border-left: orange 20px solid;
    z-index: 1000;
}
.alerts_texto{
    z-index: 1;
    position:relative;
    color:white;
    font-size: larger;
}
.alerts_background{
    background: #202428;
    opacity:0.8;
    width:285px;
    height:100%;
    position:absolute;
    z-index:0;
    left:0px;
    top:0px;
}