.container_main{
    border: 2px solid black;
    margin-left:10vw;
    margin-right:10vw;
    padding-left: 10vw;
    padding-right: 10vw;
    margin-top: 5vh;
    padding-top: 10vh;
    min-height:40vh;
    box-shadow:4px 2px 8px blue;

}