.blockEditor .swiper-scrollbar {
    position: relative;
    left: auto;
    right: auto;
    bottom: auto;
    width: min(500px, 80%);
    height: 12px;
    margin: 15px auto 0;
    background: #ddd;
    border-radius: 6px;
}

.blockEditor .swiper-scrollbar-drag {
    height: 100%;
    background: #aaa;
    border-radius: 6px;
    cursor: grab;
}