.slider {
  max-width: 600px;
  margin: 30px auto;
  position: relative;
  overflow: hidden;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.slides {
  position: relative;
  width: 100%;
  height: 400px;
  overflow:hidden;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease-in-out;
  z-index: 0;
}

.slide.active {
  opacity: 1;
  z-index: 1;
}

.slide img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px; /* optional, looks nicer */
}

.caption {
  position: absolute;
  bottom: 20px;
  left: 20px;
  padding: 10px 15px;
  background: rgba(0,0,0,0.5);
  color: #fff;
  font-size: 1rem;
  border-radius: 6px;
}