.col-centered {
    float: none;
    margin: 0 auto;
}

.carousel-control {
    width: 8%;
    width: 0;
}

    .carousel-control.left, .carousel-control.right {
        margin-right: 40px;
        margin-left: 32px;
        background-image: none;
        opacity: 1;
    }

    .carousel-control > a > span {
        color: #fff;
        font-size: 29px !important;
    }

.carousel-col {
    position: relative;
    min-height: 1px;
    padding: 5px;
    float: left;
}

.active > div {
    display: none;
}

    .active > div:first-child {
        display: block;
    }

@media(max-width:767px) {
    .carousel-inner .active.left {
        left: -50%;
    }

    .carousel-inner .active.right {
        left: 50%;
    }

    .carousel-inner .next {
        left: 50%;
    }

    .carousel-inner .prev {
        left: -50%;
    }

    .carousel-col {
        width: 50%;
    }

    .active > div:first-child + div {
        display: block;
    }
}

@media(min-width:768px) and (max-width:991px) {
    .carousel-inner .active.left {
        left: -50%;
    }

    .carousel-inner .active.right {
        left: 50%;
    }

    .carousel-inner .next {
        left: 50%;
    }

    .carousel-inner .prev {
        left: -50%;
    }

    .carousel-col {
        width: 50%;
    }

    .active > div:first-child + div {
        display: block;
    }
}

@media(min-width:992px) and (max-width:1199px) {
    .carousel-inner .active.left {
        left: -33%;
    }

    .carousel-inner .active.right {
        left: 33%;
    }

    .carousel-inner .next {
        left: 33%;
    }

    .carousel-inner .prev {
        left: -33%;
    }

    .carousel-col {
        width: 33%;
    }

    .active > div:first-child + div {
        display: block;
    }

        .active > div:first-child + div + div {
            display: block;
        }
}

@media(min-width:1200px) {
    .carousel-inner .active.left {
        left: -25%;
    }

    .carousel-inner .active.right {
        left: 25%;
    }

    .carousel-inner .next {
        left: 25%;
    }

    .carousel-inner .prev {
        left: -25%;
    }

    .carousel-col {
        width: 25%;
    }

    .active > div:first-child + div {
        display: block;
    }

        .active > div:first-child + div + div {
            display: block;
        }

            .active > div:first-child + div + div + div {
                display: block;
            }
}

.block {
    width: 306px;
    height: 230px;
}

.red {
    background: #f00;
}

.blue {
    background: #00f;
}

.green {
    background: #008000;
}

.yellow {
    background: #ff0;
}

@media(min-width:768px) {
    .carousel-control.left, .carousel-control.right {
        margin-right: -35px;
        margin-left: -35px;
        background-image: none;
        opacity: 1;
        margin-top: -50px;
    }
}

@media(max-width:767px) {
    .carousel-control.left, .carousel-control.right {
        margin-right: 0;
        margin-left: 0;
        opacity: 1;
        margin-top: -79px;
    }
}

.carousel-control > a > span {
    color: #000;
    font-size: 29px !important;
}