.slider {
  margin: 0 auto;
  max-width: 940px;
}

.slide_viewer {
  /*height: 500px;*/  
  height: 440px;  
  border-radius:20px;

  overflow: hidden;
  position: relative;
}
.slide_viewer2 {
  height: 500px;
  overflow: hidden;
  position: relative;
}

.slide_group {
  height: 100%;
  position: relative;
  width: 100%;
}

.slide {
  display: none;
  height: 100%;
  position: absolute;
  width: 100%;
}

.slide img{
  height: 100%;
  width: 100%;
  object-fit:contain;
  border-radius:20px;
}

.slide:first-child {
  display: block;
}

.slide:nth-of-type(1) {
  background: #fff;
}

.slide:nth-of-type(2) {
  background: #fff;
}

.slide:nth-of-type(3) {
  background: #fff;
}

.slide:nth-of-type(4) {
  background: #fff;
}

.slide_buttons {
  left: 0;
  position: absolute;
  right: 0;
  text-align: center;
  bottom:0;
}

a.slide_btn {
  color: #474544;
  font-size: 35px;
  margin: 0 4px;
  -webkit-transition: all 0.4s ease-in-out;
  -moz-transition: all 0.4s ease-in-out;
  -ms-transition: all 0.4s ease-in-out;
  -o-transition: all 0.4s ease-in-out;
  transition: all 0.4s ease-in-out;
  text-decoration: none;
}

.slide_btn:hover {
  color: #474544;
  cursor: pointer;
}
.slide_btn.active {
  color: #fff;
  cursor: pointer;
}

.directional_nav {
  margin: 0 auto;
  max-width: 940px;
  position: absolute;
  top:50%;
  left:0;
  right:0;
}

.previous_btn {
  bottom: 0;
  left: 20px;
  margin: auto;
  position: absolute;
  top: 0;
}

.next_btn {
  bottom: 0;
  margin: auto;
  position: absolute;
  right: 20px;
  top: 0;
}

.previous_btn, .next_btn {
  cursor: pointer;
  height: 65px;
  opacity: 0.5;
  -webkit-transition: opacity 0.4s ease-in-out;
  -moz-transition: opacity 0.4s ease-in-out;
  -ms-transition: opacity 0.4s ease-in-out;
  -o-transition: opacity 0.4s ease-in-out;
  transition: opacity 0.4s ease-in-out;
  width: 65px;
}

.previous_btn:hover, .next_btn:hover {
  opacity: 1;
}

@media only screen and (max-width: 767px) {
  .previous_btn {
    left: 20px;
  }
  .next_btn {
    right: 20px;
  }
}