*{
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

img{
  max-width: 100%;
}

.demo-gallery
{
  display: flex;
    justify-content: space-between;
    align-items: flex-start;
    position: relative;
    margin-top: 50px;
}

.main-img-slider {
  width: 80%;
  margin: 0;
  padding: 0 40px;
  max-width: 100%;
}

.thumb-nav
{
  width: 15%;
}

.slick-slider .slick-prev, .slick-slider .slick-next {
  z-index: 100;
  font-size: 2.5em;
  height: 40px;
  width: 40px;
  margin-top: -20px;
  color: #B7B7B7;
  position: absolute;
  top: 50%;
  text-align: center;
  color: #000;
  opacity: .3;
  transition: opacity .25s;
  cursor: pointer;
}
.slick-slider .slick-prev:hover, .slick-slider .slick-next:hover {
  opacity: .65;
}
.slick-slider .slick-prev {
  left: 0;
}
.slick-slider .slick-next {
  right: 0;
}

#detail .product-images {
  width: 100%;
  border:0;
}
#detail .product-images li, #detail .product-images figure, #detail .product-images a, #detail .product-images img {
  display: block;
  outline: none;
  border: none;
}
#detail .product-images .main-img-slider figure {
  margin: 0 auto;
  padding: 0 2em;
}
#detail .product-images .main-img-slider figure a {
  cursor: pointer;
  cursor: -webkit-zoom-in;
  cursor: -moz-zoom-in;
  cursor: zoom-in;
}
#detail .product-images .main-img-slider figure a img {
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
}
#detail .product-images .thumb-nav {
  margin: 0 auto;
  padding: 0;
  max-width: 100%;
  position: relative;
}
#detail .product-images .thumb-nav.slick-slider .slick-prev, #detail .product-images .thumb-nav.slick-slider .slick-next {
  font-size: 1.2em;
  height: 20px;
  width: 26px;
  margin-top: 0px;
}
#detail .product-images .thumb-nav.slick-slider .slick-prev {
  margin-left: 0px;
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%) rotate(90deg);
}

#detail .product-images .thumb-nav.slick-slider .slick-next {
  margin-left: 0px;
  position: absolute;
  bottom: -30px;
  left: 50%;
  transform: translateX(-50%) rotate(90deg);
  top: auto;
}

#detail .product-images .thumb-nav li {
  display: block;
  margin: 0 auto;
  cursor: pointer;
}
#detail .product-images .thumb-nav li img {
  display: block;
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
  border: 2px solid transparent;
  -webkit-transition: border-color .25s;
  -ms-transition: border-color .25s;
  -moz-transition: border-color .25s;
  transition: border-color .25s;
  height: 100px;
  object-fit: cover;
}
#detail .product-images .thumb-nav li:hover, #detail .product-images .thumb-nav li:focus {
  border-color: #999;
}
#detail .product-images .thumb-nav li.slick-current img {
  border-color: #000;
}

@media(max-width: 1200px){
  .demo-gallery
{
  display: block;
}
.main-img-slider
{
  width: 100%;
}
.thumb-nav
{
  width: 100%;
}
#detail .product-images .thumb-nav li img {
  height: 70px;
}
#detail .product-images .thumb-nav {
  margin: 20px auto 0;
  padding: 0 30px;
}
#detail .product-images .thumb-nav.slick-slider .slick-prev {
  bottom: auto;
  left: 0;
  top: 50%;
  transform: translate(0, -50%);
}
#detail .product-images .thumb-nav.slick-slider .slick-next {
  bottom: auto;
  right: 0;
  top: 50%;
  left: auto;
  transform: translate(0, -50%);
}
}