.slider .slick-slide {
            border: solid 1px #000;
        }

        .slider .slick-slide img {
            width: 100%;
        }

        /* make button larger and change their positions */
        .slick-prev, .slick-next {
            width: 50px;
            height: 50px;
            z-index: 1;
        }
        .slick-prev {
            left: 5px;
        }
        .slick-next {
            right: 5px;
        }
        .slick-prev:before, 
        .slick-next:before {
            font-size: 40px;
            text-shadow: 0 0 10px rgba(0,0,0,0.5);
        }
        
        /* move dotted nav position */
        .slick-dots {
            bottom: 15px;
        }
        /* enlarge dots and change their colors */
        .slick-dots li button:before {
            font-size: 12px;
            color: #fff;
            text-shadow: 0 0 10px rgba(0,0,0,0.5);
            opacity: 1;
        }
        .slick-dots li.slick-active button:before {
            color: #dedede;
        }

        /* hide dots and arrow buttons when slider is not hovered */
        .slider:not(:hover) .slick-arrow,
        .slider:not(:hover) .slick-dots {
            opacity: 0;
        }
        /* transition effects for opacity */
        .slick-arrow,
        .slick-dots {
            transition: opacity 0.5s ease-out;
        }