#slideshow #slidesContainer {
  margin:0 auto;
  width:400px;
  height:200px;
  overflow:auto; /* разрешаем прокрутку */
  position:relative;
}
	#slideshow #slidesContainer .slide {
  margin:0 auto;
  width:540px; 
  height:263px;
}
	/**
 * Slideshow controls style rules.
 */
.control {
  display:block;
  width:39px;
  height:263px;
  text-indent:-10000px;
  position:absolute;
  cursor: pointer;
}
#leftControl {
  top:0;
  left:0;
  background:transparent url(../img/istockphoto-1203618666-170667a.jpg) no-repeat 0 0;
}
#rightControl {
  top:0;
  right:0;
  background:transparent url(../img/istockphoto-1203618666-170667a.jpg) no-repeat 0 0;
}

/** ----------------------------------  */

body {
    margin: 0;
    padding: 0;
}

#block-for-slider {
    width: 80%;
    margin: 0 auto;
}

#viewport {
    width: 100%;
    position: relative;
    overflow: hidden;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    -o-user-select: none;
    user-select: none;
    text-align: center;
}

#slidewrapper {
    position: relative;
    width: calc(100% * 13);
    -webkit-transition: 1s;
    -o-transition: 1s;
    transition: 1s;
    -webkit-transition-timing-function: cubic-bezier(.67,.01,.23,1);
    -o-transition-timing-function: cubic-bezier(.67,.01,.23,1);
    transition-timing-function: cubic-bezier(.67,.01,.23,1);
}

#slidewrapper, #slidewrapper ul, #slidewrapper li {
    margin: 0;
    padding: 0;
}

.slide {
    width: calc(100%/13);
    list-style: none;
    display: inline;
    float: left;
}

.slide-img {
    height: 400px;
}

#prev-btn, #next-btn {
    position: absolute;
    width: 50px;
    height: 50px;
    background-color: #fff;
    border-radius: 50%;
    top: calc(50% - 25px);
}

#prev-btn:hover, #next-btn:hover {
    cursor: pointer;
}

#prev-btn {
    left: 20px;
	background: #F44336;
}

#next-btn {
    right: 20px;
	background: #F44336;
}

#nav-btns {
    position: absolute;
    width: 100%;
    bottom: 20px;
    padding: 0;
    margin: 0;
    text-align: center;
}

.slide-nav-btn {
    position: relative;
    display: inline-block;
    list-style: none;
    width: 20px;
    height: 20px;
    background-color: #fff;
    border-radius: 50%;
    margin: 3px;
}

.slide-nav-btn:hover {
    cursor: pointer;
}