#slider {
  width: max-content;
  height: 350px;
  align-self: center;
  position: relative;
  z-index: 99;
}

#slider ul {
  max-width: max-content;
  height: inherit;
  position: relative;
  list-style: none;
  display: flex;
  flex-flow: column;
  overflow-y: hidden;
}

#slider ul li {
  max-width: 70px;
  z-index: 2;
  cursor: pointer;
  user-select: none;
  -ms-user-select: none;
  -webkit-user-select: none;
}

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

.wrapControl {
  width: max-content;
  height: 425px;
  position: absolute;
  left: 0;
  right: 0;
  margin: 0 auto;
  bottom: -37px;
  display: flex;
  flex-flow: column-reverse;
  justify-content: space-between;
}

a.control_prev,
a.control_next {
  width: 30px;
  height: 30px;
  z-index: 999;
  display: block;
  font-size: 1.5rem;
  font-weight: bold;
  cursor: pointer;
  text-align: center;
  color: #000000;
  position: relative;
  line-height: 27px;
}

a.control_prev:hover,
a.control_next:hover {
  color: #4d4d4d;
}

a.control_prev {
  top: 0;
  transform: rotate(90deg);
}

a.control_next {
  bottom: 0;
  transform: rotate(-90deg);
}

a.control_prev::before,
a.control_next::before {
  width: 30px;
  height: 30px;
  position: absolute;
  z-index: -1;
  left: 0;
  right: 0;
  margin: 0 auto;
  background-color: #ffffff;
  border-radius: 50%;
  -moz-border-radius: 50%;
  -webkit-border-radius: 50%;
  content: "";
}