@media (min-width: 998px) {
    .modern-blog__slider .splide__slide:not(.is-visible) {
        opacity: 0.4;
        transition: opacity 0.3s ease-in-out;
    }
}

.splide:not(.is-overflow) ~ .btn-wrapper .prev,
.splide:not(.is-overflow) ~ .btn-wrapper .next {
    display: none;
}