* {
    margin: 0;
    padding: 0;
}

:root {}


html, body {
    height: 100%;
    width: 100%;
    background-color: rgba(242, 242, 242, 1);

    outline: 1px solid black;
}

.main {
    position: relative;
    height: auto;
    width: 100%;
    top: 50%;
    text-align: center;
    transform: translateY(-50%);
}

.main>.img {
    position: relative;
    max-width: 100%;
}

.main>.back {
    display: inline-block;
    overflow: hidden;
    text-indent: -999em;
    white-space: nowrap;
    width: 123px;
    height: 35px;
    margin-top: 10px;
    background: url(../images/back404.png) no-repeat
}