.carousel-indicators button.thumbnail {
    width: 100px;
}

    .carousel-indicators button.thumbnail:not(.active) {
        opacity: 0.7;
    }

.carousel-indicators {
    position: static;
}

@media screen and (min-width: 992px) {
    .carousel {
        max-width: 70%;
        margin: 0 auto;
    }
}