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CSS

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HTML

              
                <div class="container">
  <div class="window">
    <div class="frame">
      <div class="snow">
        <div class="snowflake1"></div>
        <div class="snowflake2"></div>
        <div class="snowflake3"></div>
        <div class="snowflake4"></div>
        <div class="snowflake5"></div>
      </div>
      <div class="hills"></div>
      <div class="tree"></div>
      <div class="tree2"></div>
      <div class="tree3"></div>
      <div class="tree4"></div>
      <div class="shine"></div>
    </div>
    <div class="sill"></div>
    <div class="knob"></div>
    <div class="mug"></div>
    <div id="up" class="steam"></div>
    <div id="up" class="steam2"></div>
    <div id="up" class="steam3"></div>
  </div>
</div>
              
            
!

CSS

              
                body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #e9c46a;
}
.container {
  position: relative;
}

.window {
  position: relative;
}

.frame {
  position: relative;
  width: 350px;
  height: 250px;
  border: 5px solid #e9ecef;
  background-color: #48cae4;
  overflow:hidden;
}

.hills {
  position: absolute;
  background-color: #90e0ef;
  width: 550px;
  height:250px;
  border-radius:50%;
  top:80px;
  left:-100px;
}

.hills:before {
  position: absolute;
  content:"";
  background-color: #ade8f4;
  width: 1000px;
  height:250px;
  border-radius:50%;
  left:50px;
  top:20px;
}

.hills:after {
  content:"";
  position: absolute;
  background-color: #caf0f8;
  width: 800px;
  height:250px;
  border-radius:50%;
  left:-200px;
  top:100px;
}

.tree {
  position: absolute;
  width:3px;
  height:15px;
  background-color: #432818;
  top:170px;
  left:75px;
}

.tree:before {
  content:"";
  position: absolute;
  border-bottom:40px solid #2c6e49;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  width:0;
  height:0;
  left:-8px;
  top:-30px;
}

.tree:after {
  content:"";
  position: absolute;
  width:2px;
  height:15px;
  background-color: #432818;
  top:-60px;
  left:75px;
}

.tree2 {
  position: absolute;
  border-bottom:35px solid #4c956c;
  border-left: 7px solid transparent;
  border-right: 7px solid transparent;
  width:0;
  height:0;
  top:85px;
  left:144px;
}

.tree2:before {
  content:"";
  position: absolute;
  width:1.5px;
  height:15px;
  background-color: #432818;
  top:-12px;
  left:115px;
}

.tree2:after {
  content:"";
  position: absolute;
  border-bottom:27px solid #2c6e49;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  width:0;
  height:0;
  top:-28px;
  left:110px;
}

.tree3 {
  position: absolute;
  width:1.5px;
  height:15px;
  background-color: #432818;
  top:85px;
  left:25px;
}

.tree3:before {
  content:"";
  position: absolute;
  border-bottom:20px solid #4c956c;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  width:0;
  height:0;
  top:-8px;
  left:-5px;
}

.tree3:after {
  content:"";
  position: absolute;
  width:1.5px;
  height:15px;
  background-color: #432818;
  left:17px;
  top:-5px;
}

.tree4 {
  position: absolute;
  border-bottom:27px solid #2c6e49;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  width:0;
  height:0;
  top:64px;
  left:37px;
}

.tree4:before {
  content:"";
  position: absolute;
  width:1.5px;
  height:15px;
  background-color: #432818;
  left:147px;
  top:40px;
}

.tree4:after {
  content:"";
  position: absolute;
  border-bottom:27px solid #2c6e49;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  width:0;
  height:0;
  top:23px;
  left:142px;
}

.shine {
  position: absolute;
  width: 200px;
  height:100px;
  background-color: rgba(255,255,255,0.2);
  transform: skew(-20deg,-50deg);
  top:50px;
  left:-10px;
}

.shine:before {
  content:"";
  position: absolute;
  width: 200px;
  height:100px;
  background-color: rgba(255,255,255,0.2);
  top:400px;
  left:320px;
}

.sill {
  position: absolute;
  left:-20px;
  width:400px;
  height:10px;
  background-color: #c5c3c6;
  z-index:15;
  box-shadow: 5px 7px 0 rgba(0,0,0,0.05);
}

.sill:before {
  width:340px;
  height:240px;
  border: 5px solid white;
  content:"";
  position: absolute;
  top:-300px;
  left:25px;
  top:-255px;
  box-shadow:inset 5px 5px rgba(0,0,0,0.05);
}

.sill:after {
  content:"";
  position: absolute;
  background-color: white;
  height: 240px;
  width:10px;
  left:193px;
  top:-250px;
  box-shadow:5px 1px rgba(0,0,0,0.05);
}

.knob {
  position: absolute;
  width:30px;
  height:10px;
  border-radius:10px;
  background-color: #c5c3c6;
  z-index:20;
  top:135px;
  left:175px;
}

.snow {
  position: absolute;
}

.snowflake1, .snowflake2, .snowflake3, .snowflake4, .snowflake5 {
  width:5px;
  height:5px;
  border-radius:50%;
  opacity:0.7;
  position: absolute;
  z-index:10;
  background-color: white;
}

.snowflake1 {
  animation: fall 4s linear infinite;
  box-shadow: 100px -10px white, 200px -5px white, -20px -35px white, 250px -50px white, 240px -150px white, 40px -130px white;
  left:50px;
}

.snowflake2 {
  animation: fall 5s linear infinite;
  animation-delay:2s;
  top:-55px;
  box-shadow: 75px -10px white, 163px -10px white, -20px -35px white, 250px -50px white, 240px -150px white, 40px -130px white;
  left:30px;
}

.snowflake3 {
  animation: fall 4.5s linear infinite;
  animation-delay:1s;
  top:-85px;
  box-shadow: 90px -10px white, 180px -15px white, -20px -35px white, 230px -50px white, 10px -140px white, 70px -120px white;
  left:60px;
}

.snowflake4 {
  animation: fall 3.5s linear infinite;
  top:-115px;
  box-shadow: 70px -20px white, 140px -5px white, -20px -35px white, 230px -50px white, 110px -80px white, 99px -25 white;
  left:80px;
}

.snowflake5 {
  animation: fall 2.9s linear infinite;
  animation-delay:3s;
  top:-145px;
  box-shadow: 190px -10px white, 280px -15px white, 320px -35px white, 230px -50px white, 113px -100px white, 256px -50px white, 116px -50px white;
  left:-5px;
}

@keyframes fall {
    100% {transform: translateY(400px);}
}

.mug {
  position: absolute;
  background-color: #db504a;
  width:28px;
  height: 35px;
  border-radius:5px 5px 10px 10px;
  z-index:25;
  top:225px;
  left:250px;
  box-shadow:inset -5px -5px rgba(0,0,0,0.05);
}

.mug:before {
  content:"";
  position: absolute;
  border:5px solid #db504a;
  width:15px;
  height:15px;
  border-radius:50%;
  left:-10px;
  top:5px;
}

#up {
  position: absolute;
  width: 20px;
  height: 20px;
  background-color: #F3F1E7;
  border-radius: 50%;
  opacity: 0;
  top: 220px;
  left: 255px;
  z-index:20;
}

.steam {
  animation: up 3s ease-out infinite; 
}

.steam2 {
  animation: up 2s ease-out infinite; 
  animation-delay:0.5s;
}

.steam2:before {
  content:"";
  position: absolute;
  left:5px;
  width:15px;
  height:15px;
  background-color: #fff;
  border-radius:50%;
  top:20px;
}

@keyframes up {
  0%{
    transform: translateY(0) scale(0.5);
    opacity: 0.9;
  }
  100%{
    transform: translateY(-50px) scale(1);
    opacity: 0;
  }
}
              
            
!

JS

              
                
              
            
!
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