<div class="four-seasons">
  <div class="window">
      <div>
  <input type="radio" id="spring" name="slideshow" value="spring">
  <label class="spring" for="spring">
    <div class="r-button1"></div>
    <div class="flowers"></div>
  </label>
  </div>
      <div>
  <input type="radio" id="summer" name="slideshow" value="summer">
  <label class="summer" for="summer">
    <div class="r-button2"></div>
    <div class="sun"></div>
  </label>
  </div>
      <div>
  <input type="radio" id="autumn" name="slideshow" value="autumn">
  <label class="autumn" for="autumn">
    <div class="r-button3"></div>
    <div class="leaf"></div>
  </label>
  </div>
      <div>
 <input type="radio" id="winter" name="slideshow" value="winter">
  <label class="winter" for="winter">
    <div class="r-button4"></div>
    <div class="snow"></div>
  </label>
  </div>
  </div>
  <div class="window-sill"></div>
</div>
 body {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background-color: #718355;
}

.four-seasons {
  position: relative;
}

.window {
  position: relative;
  overflow: hidden;
  width: 330px;
  height: 250px;
  border: 10px solid white;
}

.r-button1, .r-button2, .r-button3, .r-button4 {
  position: relative;
  display: block;
  border-radius: 50%; 
  background-color: transparent;
  cursor: pointer;
  border: 3px solid #dad7cd;
  transition: .3s;
  width:10px;
  height: 10px;
  z-index:10;
  top:210px;
}

.r-button1:before, .r-button2:before, .r-button3:before, .r-button4:before {
  content:"";
  position: absolute;
  height:7px;
  width:7px;
  background-color: transparent;
  transform: translate(-50%, -50%);
  left:50%;
  top:50%;
  border-radius:50%;
}

.r-button1 {
  left:115px;
}

.r-button2 {
  left:145px;
}

.r-button3 {
  left: 175px;
}

.r-button4 {
  left: 205px;
}

input#spring:checked ~ .spring {
  display: block;
  z-index:1;
}

input#summer:checked ~ .summer {
  display: block;
  z-index:1;
}

input#autumn:checked ~ .autumn {
  display: block;
  z-index:1;
}

input#winter:checked ~ .winter {
  display: block;
  z-index:1;
}

input {
  opacity: 0;
  cursor: pointer;
  display: block;
  position: absolute;
  outline: none;
  left: 0;
  z-index: 10;
}

input[type=radio]:checked + label .r-button1:before {
  background-color: #dad7cd;
}
input[type=radio]:checked:hover + label .r-button1:before {
  background-color: #a3b18a;
}

input[type=radio]:hover + label .r-button1 {
  border-color: #a3b18a;
}

input[type=radio]:checked + label .r-button2:before {
  background-color: #dad7cd;
}
input[type=radio]:checked:hover + label .r-button2:before {
  background-color: #a3b18a;
}

input[type=radio]:hover + label .r-button2 {
  border-color: #a3b18a;
}

input[type=radio]:checked + label .r-button3:before {
  background-color: #dad7cd;
}
input[type=radio]:checked:hover + label .r-button3:before {
  background-color: #a3b18a;
}

input[type=radio]:hover + label .r-button3 {
  border-color: #a3b18a;
}

input[type=radio]:checked + label .r-button4:before {
  background-color: #dad7cd;
}
input[type=radio]:checked:hover + label .r-button4:before {
  background-color: #a3b18a;
}

input[type=radio]:hover + label .r-button4 {
  border-color: #a3b18a;
}

.spring, .summer, .autumn, .winter {
  position: absolute;
  width: 330px;
  height: 250px;
  transition: .3s;
}

.spring {
  background-color: #00b4d8;
}

.summer {
  background-color: #48cae4;
}

.autumn {
  background-color: #61a5c2;
}

.winter {
  background-color: #caf0f8;
}

.spring:before, .summer:before, .autumn:before, .winter:before {
  content:"";
  position: absolute;
  width:450px;
  height: 200px;
  border-radius:50%;
  left:-70px;
  top:160px;
}

.spring:after, .summer:after, .autumn:after, .winter:after {
  content:"";
  position: absolute;
  border-style: solid;
  border-width: 0 20px 60px 20px;
  top:65px;
  left:-2px;
}

.spring:before {
  background-color: #70e000;
  box-shadow: -150px -25px #38b000, 100px -30px #008000;
}

.summer:before {
  background-color: #38b000;
  box-shadow: -150px -25px #008000, 100px -30px #007200;
}

.autumn:before {
  background-color: #ca5310;
  box-shadow: -150px -25px #bb4d00, 100px -30px #8f250c;
}

.winter:before {
  background-color: #f8f9fa;
  box-shadow: -150px -25px #e9ecef, 100px -30px #dee2e6;
}

.window:before {
  content:"";
  position: absolute;
  background-color: #774936;
  width:7px;
  height: 10px;
  z-index:10;
  top:125px;
  left:15px;
  box-shadow: 30px 3px #774936, 170px 0 #774936, 270px 48px #774936;
}

.window:after {
    content:"";
    position: absolute;
    z-index:10;
    border-style: solid;
    border-width: 0 20px 60px 20px;
    border-color: transparent transparent #007f5f transparent;
    top: 70px;
    left:28px;
    filter: drop-shadow(240px 45px #007f5f);
}

.sun {
  position: absolute;
  border-radius:50%;
  width: 60px;
  height: 60px;
  background-color: #ffc300;
  left:50px;
  box-shadow: 0 0 50px #ffd60a;
  animation: sun 5s linear infinite;
}

.sun:before {
  content:"";
  position: absolute;
  border-radius: 50%;
  width: 45px;
  height: 45px;
  left:7.5px;
  top: 7.5px;
  background-color: #f1dca7;
}

@keyframes sun {
  0% {
    box-shadow: 0 0 100px #ffd60a;
  }
  50% {
    box-shadow: 0 0 0 #ffd60a;
  }
}

.snow, .snow:before {
  position: absolute;
  border-radius:50%;
  width:5px; 
  height: 5px;
  background-color: #f8f9fa;
  box-shadow: 10px -20px #f8f9fa, 20px -30px #f8f9fa, 30px 30px #f8f9fa, -30px -30px #f8f9fa, 40px -20px #f8f9fa, 50px 20px #f8f9fa, 0 -30px #f8f9fa, 15px -60px #f8f9fa;
  filter: drop-shadow(50px -50px #f8f9fa) drop-shadow(150px -50px #f8f9fa) drop-shadow(200px -70px #f8f9fa) drop-shadow(50px -150px #f8f9fa) drop-shadow(0 -100px #f8f9fa);
  animation: snow 5s linear infinite;
}

.snow:before {
  content:"";
  animation-delay: 2.5s;
}

@keyframes snow {
  0% {transform: translateY(-50px);}
  100% {transform: translateY(300px);}
}

.spring:after {
  border-color: transparent transparent #38b000 transparent;
  filter: drop-shadow(170px 0 #38b000);
}

.summer:after {
  border-color: transparent transparent #008000 transparent;
  filter: drop-shadow(170px 0 #008000);
}

.autumn:after {
  border-color: transparent transparent #8d0801 transparent;
  filter: drop-shadow(170px 0 #8d0801);
}

.winter:after {
  border-color: transparent transparent #f8f9fa transparent;
  filter: drop-shadow(170px 0 #f8f9fa);
}

.flowers {
  position: absolute;
  width:5px;
  height: 10px;
  background-color: #fff;
  border-radius:10px;
  left:30px;
  top: 210px;
  filter: drop-shadow(50px -20px #ffd23f) drop-shadow(170px 0 #90e0ef) drop-shadow(40px 20px #ffb3c1);
}

.flowers:before {
    content:"";
    position: absolute;
    background-color: #fff;
    width:10px;
    height: 5px;
    border-radius: 10px;
    top:2.5px;
    left:-2.5px;
}

.leaf {
    position: absolute;
    background-color: #78290f;
    width: 15px;
    height: 15px;
    border-radius: 0 50% 0 50%;
    left:50px;
    animation: fall 5s linear infinite;
    box-shadow: 100px -50px #9e2a2b;
}

.leaf:before {
    content:"";
    position: absolute;
    border-radius: 50% 0 50% 0;
    width: 13px;
    height: 13px;
    background-color: #e09f3e;
    left:100px;
    animation-delay: 1s;
}

@keyframes fall {
  0% {top:-50px; transform: translateX(-50px) rotateX(180deg);}
  100% {top:250px; transform: translateX(150px) rotateX(-180deg);}
}

.window-sill {
    position: absolute;
    width: 400px;
    height: 20px;
    border-radius: 20px;
    background-color: #dda15e;
    left:-26px;
    box-shadow: inset 2px 2px 10px rgba(0,0,0,.2), 15px 15px rgba(0,0,0,.2);
}

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