slider {
  position: relative;
  max-width: 600px;
  margin: auto;
  overflow: hidden;
}

.slides {
  display: flex;
  transition: transform 0.5s ease;
  width: 300%; /* 100% x number of slides */
}

.slide {
  width: 100%;
  flex-shrink: 0;
}

.prev, .next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background-color: #333;
  color: white;
  border: none;
  padding: 10px;
  cursor: pointer;
  z-index: 10;
}

.prev { left: 10px; }
.next { right: 10px; }