html {
    margin: 0px;
    height: 100%;
    width: 100%;
    background: url(../images/background_404.jpg) no-repeat center center fixed;
    background-size: cover;
    font-family: "Open Sans", sans-serif;
}

body {
    margin: 0px;
    padding: 0;
    color: white;
    width: 100%;
    height: 100%;
    display: flex;
}

.box-404 {
    margin: auto;
    text-align: center;
}

.title {
    font-size: 2em;
}

.subtitle {
    font-size: 1.2em;
    margin-bottom: 50px;
}

.link {
    background-color: white;
    color: #4D99E7;
    text-decoration: none;
    border: 2px solid white;
    padding: 10px;
    font-size: 1.2em;
}

    .link:hover {
        cursor: pointer;
    }