.slider {
  margin: 50px auto 0;
  max-width: 900px;
  width: 80%;
}
.slider-img img {
  height: auto;
  width: 100%;
}
.slide-arrow {
  bottom: 0;
  cursor: pointer;
  margin: auto;
  position: absolute;
  top: 0;
  width: 30px;
}
.prev-arrow {
  left: -35px;
}
.next-arrow {
  right: -35px;
}
.prev-arrow {
  transform: scaleX(-1);
}
@media screen and (min-width: 600px) {
  .slider {
    margin: 100px auto 0;
    max-width: 1000px;
  }
  .slide-arrow {
    width: 50px;
  }
  .prev-arrow {
    left: -65px;
  }
  .next-arrow {
    right: -65px;
  }
}