.not-found {
    color: #888;
    text-align: center;
    margin-top: 100px;
}

    .not-found > h1 {
        color: #555;
        font-size: 2.5em;
        font-weight: 400;
        margin-bottom: 0;
    }

    .not-found > p {
        margin: 0 auto;
        width: 280px;
        font-size: 1.3em;
    }