*{margin: 0;  padding: 0; box-sizing: border-box;}
.footer_main{
    width: 100%;    bottom: 0;
    position: fixed;
    background-color: rgba(51, 51, 51, .9);
    display: flex;  flex-direction: column;
    color: aliceblue;
}
.social_container{
    padding: 2em;
    text-align: center; flex: 1;
}
.social_container img{width: 10%;    margin: 5%;}
.copyright_container{
    padding: 2em;
    display: flex;  flex-direction: column;
    align-items: center;
    font-size: 100%;    flex: 1;
}
.behind_complete{display: none;}
.social_container img:hover{transform: scale(2);}
@media screen and (min-width: 1000px){
    .footer_main{flex-direction: row;}
    .copyright_container{
        justify-content: center;    align-items: center;
        font-size: 18px;
    }
    .behind_complete{display: contents;}
    .behind_medium{display: none;}
}