#slider {
  margin: 0 auto;
  width: 800px;
  max-width: 100%;
  text-align: center;
}

#slider input[type=radio] {
  display: none;
}

#slider label {
  cursor: pointer;
  text-decoration: none;
}

#slides {
  padding: 30px;
  border: 3px solid #ccc;
  background: #fff;
  position: relative;
  z-index: 1;
}

#overflow {
  width: 100%;
  overflow: hidden;
}

#s-11:checked ~ #slides .inner {
  margin-left: 0;
}

#s-12:checked ~ #slides .inner {
  margin-left: -100%;
}

#s-13:checked ~ #slides .inner {
  margin-left: -200%;
}

#s-14:checked ~ #slides .inner {
  margin-left: -300%;
}

#s-15:checked ~ #slides .inner {
  margin-left: -400%;
}

#s-16:checked ~ #slides .inner {
  margin-left: -500%;
}

#s-17:checked ~ #slides .inner {
  margin-left: -600%;
}

#s-18:checked ~ #slides .inner {
  margin-left: -700%;
}

#s-19:checked ~ #slides .inner {
  margin-left: -800%;
}

#s-20:checked ~ #slides .inner {
  margin-left: -900%;
}

#slides .inner {
  transition: margin-left 800ms cubic-bezier(0.770, 0.000, 0.175, 1.000);
  width: 400%;
  line-height: 0;
  height: 300px;
}

#slides .slide {
  width: 25%;
  float: left;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  color: #fff;
}

#slides .slide-11 {
  background: green;
}

#slides .slide-12 {
  background: yellow;
}

#slides .slide-13 {
  background: brown;
}

#slides .slide-14 {
  background: grey;
}

#slides .slide-15 {
  background: blueviolet;
}

#slides .slide-16 {
  background: violet;
}

#slides .slide-17 {
  background: aqua;
}

#slides .slide-18 {
  background: burlywood;
}

#slides .slide-19 {
  background: chartreuse;
}

#slides .slide-20 {
  background: darkmagenta;
}

.slide-content {
  padding: 10px;
}

#controls {
  margin: -180px 0 0 0;
  width: 100%;
  height: 50px;
  z-index: 3;
  position: relative;
}

#controls label {
  transition: opacity 0.2s ease-out;
  display: none;
  width: 50px;
  height: 50px;
  opacity: .4;
}

#controls label:hover {
  opacity: 1;
}

#s-11:checked ~ #controls label:nth-child(2), #s-12:checked ~ #controls label:nth-child(3), #s-13:checked ~ #controls label:nth-child(4), #s-14:checked ~ #controls label:nth-child(5), #s-15:checked ~ #controls label:nth-child(6), #s-16:checked ~ #controls label:nth-child(7), #s-17:checked ~ #controls label:nth-child(8), #s-18:checked ~ #controls label:nth-child(9), #s-19:checked ~ #controls label:nth-child(10), #s-20:checked ~ #controls label:nth-child(1) {
  background: url(https://image.flaticon.com/icons/svg/130/130884.svg) no-repeat;
  float: right;
  margin: 0 -50px 0 0;
  display: block;
}

#s-11:checked ~ #controls label:nth-last-child(2), #s-12:checked ~ #controls label:nth-last-child(3), #s-13:checked ~ #controls label:nth-last-child(4), #s-14:checked ~ #controls label:nth-last-child(5), #s-15:checked ~ #controls label:nth-last-child(6), #s-16:checked ~ #controls label:nth-last-child(7), #s-17:checked ~ #controls label:nth-last-child(8), #s-18:checked ~ #controls label:nth-last-child(9), #s-19:checked ~ #controls label:nth-last-child(10), #s-20:checked ~ #controls label:nth-last-child(1) {
  background: url(https://image.flaticon.com/icons/svg/130/130882.svg) no-repeat;
  float: left;
  margin: 0 0 0 -50px;
  display: block;
}

#bullets {
  margin: 150px 0 0;
  text-align: center;
}

#bullets label {
  display: inline-block;
  width: 10px;
  height: 10px;
  background: #ccc;
  border-radius: 100%;
  margin: 0 10px;
}

#s-11:checked ~ #bullets label:nth-child(1), #s-12:checked ~ #bullets label:nth-child(2), #s-13:checked ~ #bullets label:nth-child(3), #s-14:checked ~ #bullets label:nth-child(4), #s-15:checked ~ #bullets label:nth-child(5), #s-16:checked ~ #bullets label:nth-child(6), #s-17:checked ~ #bullets label:nth-child(7), #s-18:checked ~ #bullets label:nth-child(8), #s-19:checked ~ #bullets label:nth-child(9), #s-20:checked ~ #bullets label:nth-child(10) {
  background: #444;
}

@media screen and (max-width: 900px) {
  #s-11:checked ~ #controls label:nth-child(2), #s-12:checked ~ #controls label:nth-child(3), #s-13:checked ~ #controls label:nth-child(4), #s-14:checked ~ #controls label:nth-child(5), #s-15:checked ~ #controls label:nth-child(6), #s-16:checked ~ #controls label:nth-child(7), #s-17:checked ~ #controls label:nth-child(8), #s-18:checked ~ #controls label:nth-child(9), #s-19:checked ~ #controls label:nth-child(10), #s-20:checked ~ #controls label:nth-child(1), #s-11:checked ~ #controls label:nth-last-child(2), #s-12:checked ~ #controls label:nth-last-child(3), #s-13:checked ~ #controls label:nth-last-child(4), #s-14:checked ~ #controls label:nth-last-child(5), #s-15:checked ~ #controls label:nth-last-child(6), #s-16:checked ~ #controls label:nth-last-child(7), #s-17:checked ~ #controls label:nth-last-child(8), #s-18:checked ~ #controls label:nth-last-child(9), #s-19:checked ~ #controls label:nth-last-child(10), #s-20:checked ~ #controls label:nth-last-child(1) {
    margin: 0;
  }
}

@media screen and (max-width: 900px) {
  #slides {
    max-width: calc(100% - 140px);
    margin: 0 auto;
  }
}