.report .btn_back {
    text-align: center;
    max-width: 580px;
    width: 80%;
    text-align: center;
    margin: 0 auto 5em;
}

.report .btn_back .btn a {
    display: block;
    padding: 1em;
    background: #707070;
    color: #FFFFFF;
    transition: all 0.5s 0s ease;
}

.report .btn_back .btn a:hover {
    background: #474747;
}