* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
.container {
  width: 100%;
  height: 100vh;
  background: #222;
  display: flex;
  align-items: center;
  justify-content: center;
}
.img-1 {
  width: 90vw;
  height: 90vh;
  background-image: linear-gradient(#777, red);
  display: block;
}
.img-2 {
  width: 90vw;
  height: 90vh;
  background-image: linear-gradient(#777, blue);
  display: block;
}
.img-3 {
  width: 90vw;
  height: 90vh;
  background-image: linear-gradient(#777, green);
  display: block;
}

.swiper {
  width: 80%;
  height: fit-content;
}

.swiper .swiper-button-prev,
.swiper .swiper-button-next {
  color: #fff;
}
.swiper .swiper-pagination-bullet-active {
  background: #fff;
}