body.error404 {
    #main {
        .container {
            text-align: center;
            ._404-text {
                font-size: 36px;
                margin-top: 64px;
                line-height: 64px;
                margin-bottom: 32px;
            }
            .btn {
                border-color: darken($success, 5);
            }
        }
    }
}