.not-found-title {
    text-transform: uppercase;
    font-size: 50px;
    line-height: 51px;
    display: inline-block;
    padding-left: 10rem;
    padding-top: 5rem;
    height: 8rem;
    margin-bottom: 30px;
    background: url(../images/page-not-found.png) center left no-repeat;
}

.not-found-subtitle{
    color: black;
}

.btn-return {
    margin-left: 7rem;
}