* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

h2 {
  text-align: center;
  padding: 50px 0;
  font-family: 'Abel', sans-serif;
  font-size: 45px;
}
@media (max-width: 680px) {
  h2 {
    font-size: 30px;
  }
}

ul {
  padding: 0;
  list-style: none;
}
ul:after {
  content: "";
  display: block;
  clear: both;
}

#container {
  width: 100%;
}

#slider-container {
  width: 100%;
  position: relative;
  overflow: hidden;
}
#slider-container ul li {
  float: left;
}
#slider-container ul li img {
  width: 100%;
  float: left;
  
}
#slider-container .arrow {
  display: block;
  position: absolute;
  top: 50%;
  width: 50px;
  height: 50px;
  transform: translateY(-50%) scale(1);
  cursor: pointer;
}
#slider-container .arrow:before, #slider-container .arrow:after {
  content: "";
  display: block;
  width: 34px;
  height: 1px;
  position: absolute;
  background: white;
  border-top: 1px solid grey;
}
@media (max-width: 680px) {
  #slider-container .arrow {
    transform: translateY(-50%) scale(0.5);
  }
}
#slider-container .arrow.a-left {
  left: 15px;
}
#slider-container .arrow.a-left:before {
  top: 0;
  left: 0;
  margin-top: 0;
  transform: rotate(-45deg);
  transform-origin: 100% 0;
}
#slider-container .arrow.a-left:after {
  bottom: 0;
  left: 0;
  margin-bottom: 0;
  transform: rotate(45deg);
  transform-origin: 100% 0;
}
#slider-container .arrow.a-right {
  right: 15px;
}
#slider-container .arrow.a-right:before {
  top: 0;
  right: 0;
  margin-top: 0;
  transform: rotate(45deg);
  transform-origin: 0 0;
}
#slider-container .arrow.a-right:after {
  bottom: 0;
  right: 0;
  margin-bottom: 0;
  transform: rotate(-45deg);
  transform-origin: 0 0;
}
#slider-container .bullets-container {
  position: absolute;
  bottom: 5%;
  left: 50%;
  transform: translateX(-50%);
}
#slider-container .bullets-container .bullet {
  width: 15px;
  height: 15px;
  display: inline-block;
  border-radius: 50%;
  border: 1px solid grey;
  cursor: pointer;
  margin: 0 8px;
}
#slider-container .bullets-container .bullet.active {
  background: grey;
}