#custom-slider {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: auto;
}

#custom-slider ul {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

#custom-slider ul li {
  position: relative;
  display: block;
  float: left;
  margin: 0;
  padding: 0;
}

#custom-slider ul li img {
  height: 100%;
  width: 100%;
}

#custom-slider .control_prev, .control_next {
  position: absolute;
  top: 43%;
  z-index: 999;
  display: block;
  padding: 3% 1%;
  cursor: pointer;
}

#custom-slider .control_next {
  right: 0;
}