.system_container{
    background-color:Indigo;
    background-image: url("../img/back_podl.png");
    background-repeat: repeat;
    height: 100vh;
    width: 100vw;
    /*display: grid;
    grid-template-columns: 35vw 30vw 35vw;*/
}
.podl_center{
    background-color: #d9ceee;
}