style.css

body,
#slider,
.wrap,
.slide-content {
  margin: 0;
  padding: 0;
  font-family: 'Quicksand', sans-serif;
  font-weight: 300;
  width: 100%;
  height: 100vh;
  overflow-x: hidden;
}

.wrap {
  position: relative;
}

.slide {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.slide1 {
  background-image: url('https://images.pexels.com/photos/3617500/pexels-photo-3617500.jpeg?auto=compress&cs=tinysrgb&h=650&w=940');
}

.slide2 {
  background-image: url('https://images.pexels.com/photos/624015/pexels-photo-624015.jpeg?auto=compress&cs=tinysrgb&h=650&w=940');
}

.slide3 {
  background-image: url('https://images.unsplash.com/photo-1549138144-42ff3cdd2bf8?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1034&q=80');
}

.slide4 {
  background-image: url('https://images.pexels.com/photos/258112/pexels-photo-258112.jpeg?auto=compress&cs=tinysrgb&h=650&w=940');
}

.slide5 {
  background-image: url('https://cdn.pixabay.com/photo/2017/08/13/19/04/finland-2638253_960_720.jpg');
}

.slide6 {
  background-image: url('https://images.pexels.com/photos/3535417/pexels-photo-3535417.jpeg?auto=compress&cs=tinysrgb&h=650&w=940');
}

.slide7 {
  background-image: url('https://images.pexels.com/photos/3472764/pexels-photo-3472764.jpeg?auto=compress&cs=tinysrgb&h=650&w=940');
}

.slide8 {
  background-image: url('https://cdn.pixabay.com/photo/2016/02/09/19/57/aurora-1190254_960_720.jpg');
}

.slide-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}



.arrow {
  cursor: pointer;
  position: absolute;
  top: 50%;
  margin-top: -55px;
  width: 0;
  height: 0;
  border-style: solid;
}

#arrow-left {
  border-width: 20px 25px 20px 0;
  border-color: transparent rgba(255, 255, 255, 0.7);
  left: 0;
  margin-left: 30px;
}

#arrow-right {
  border-width: 20px 0 20px 25px;
  border-color: transparent rgba(255, 255, 255, 0.7);
  right: 0;
  margin-right: 30px;
}