.post-box__ref {
    position: absolute;

    font-family: Russo One;
    color: #DDDDDD;
    font-size: 1.6vw;

    top: 12.5vw;
    z-index: 1;

    text-shadow: rgba(0, 0, 0, 0.5) 0 0.1vw 0.2vw;
}

.post-box__ref_backward {
    left: 1.4vw;
}

.post-box__ref_forward {
    right: 1.4vw;
}

.post-box__ref:hover {
    color: white;
}

@media screen and (max-width: 1000px) and (orientation: portrait) {
    .post-box__ref {
        top: 20vw;
        font-size: 2.75vw;
    }
}