.footer{
    display: flex;
    flex-direction: column;
    align-items: center;
    border-top: 1px solid black;
    padding-top: 20px;
    padding-bottom: 20px;
}
.footer > p{
    line-height: 30px;
    height: 30px;
    margin-bottom: 0!important;
    font-size: 16px;
}
#backtop{
    width: 30px;
    height: 30px;
    position: fixed;
    right: 30px;
    bottom: 30px;
    cursor: pointer;
}
#backtop img{
    width: 100%;
    height: 100%;
}