.pop_back {
    display: grid;
    grid-template-rows: repeat(3,1fr);
    grid-template-columns: repeat(3,1fr);
    position: fixed;
    top : 0;
    left: 0;
    height: 100vh;
    width: 100vw;
    text-align: center;
    background: rgba(200,200,200,0.7);
}

.pop_error {
    display: grid;
    /*grid-template-columns: 100px 1fr;*/
    grid-template-rows: 1fr 100px;
    /*position: fixed;*/
    grid-row: 2;
    grid-column: 2;
    /*top : 25vh;*/
    /*height: 50vh;*/
    width: 50vh;
    min-height: 50px;
    min-width: 480px;
    margin: auto;
    padding: 5px;
    box-shadow: 0px 0px 10px 2px #939393;
    text-align: center;
    background: white;
}

.pop_error button {
    margin: auto;
}

.pop_message {
    display : grid;
    grid-template-columns: 100px 1fr;
}