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              .ground-plane

.fan
  %input#switch{:type=>"checkbox"}
  .head
    .blades
      .blade
      .blade
      .blade
    .cover
    .center
  .support
  .base
  %label.switch{'for'=>'switch'}
            
          
!
            
              $fanColor: teal;
$fanTrim: silver;
$fanBladeColor: gray;
$fanMetal: #ccc;


html,body {
  width:100%;
  height:100%;
  position:relative;
}

body {
  background-color:skyblue;
  perspective:500px;
  overflow:hidden;
}

.ground-plane {
  position:absolute;
  width:1000%;
  height:calc(10% + 200px);
  bottom:0;
  left:-500%;
  background-color:darken(skyblue, 15%);
}

.fan {
  position:absolute;
  width:500px;
  height:500px;
  left:50%;
  bottom: 10%;
  transform:translateX(-50%);
}

input#switch {
  display:none;
}

.switch {
  position:absolute;
  background-color: darken($fanMetal,15%);
  border:5px solid $fanMetal;
  height:25px;
  width:15px;
  border-radius:50%;
  bottom:70px;
  left:35%;
  
  &:before {
    content:"";
    width:30px;
    height:10px;
    position:absolute;
    right:-2px;
    top:50%;
    transform-origin:100% 50%;
    transform:translateY(-50%)rotate(-20deg);
    background-color:$fanMetal;
    border-radius:5px 0 0 5px;
    transition:all 150ms; 
  }
}

#switch:checked {
  &~.switch:before  {
    transform:translateY(-50%)rotate(20deg);
  }
  &~.head .blades  {
    animation:spin 1s linear infinite;
  }
}

.head {
  position:absolute;
  top:0;
  left:60%;
  transform:translateX(-50%) rotateY(3deg);
  border:10px solid $fanTrim;
  width:300px;
  height:300px;
  border-radius:50%;
  z-index:5;
  box-shadow :
    -1px 0px 0px 0px darken($fanTrim, 5%), 
    -2px 0px 0px 0px darken($fanTrim, 5%),
    -3px 0px 0px 0px darken($fanTrim, 5%),
    -4px 0px 0px 0px darken($fanTrim, 5%),
    -5px 0px 0px -1px darken($fanTrim, 5%),
    -6px 0px 0px -1px darken($fanTrim, 5%),
    -7px 0px 0px -1px darken($fanTrim, 5%),
    -8px 0px 0px -1px darken($fanTrim, 5%),
    -10px 0px 0px -1px darken($fanTrim, 5%),
    -12px 0px 0px -1px darken($fanTrim, 5%),
    -14px 0px 0px -1px darken($fanTrim, 5%),
    -16px 0px 0px -1px darken($fanTrim, 5%);
}

.blades {
  //todo: Add rotation animation
  position:absolute;
  height:100%;
  width:100%;
  z-index:2;
  animation:spinDown 1s ease-out forwards;
  //
}

@keyframes spin {
  0% {
    transform:rotate(0deg);
  }
  100% {
    transform:rotate(360deg);
  }
}
@keyframes spinDown {
  0% {
    transform:rotate(-360deg);
  }
  100% {
    transform:rotate(0deg);
  }
}
.blade {
  position:absolute;
  width:20%;
  height:45%;
  top:5%;
  left:50%;
  background-color:$fanBladeColor;
  transform-origin:50% 100%;
  transform: perspective(150px) translateX(-50%) ;
  border-radius:50% 20px 20px 20px / 10px 100px 10px 10px;
  
  &:nth-child(2) {
    transform: perspective(150px) translateX(-50%) rotateZ(120deg);
  }
  
  &:nth-child(3) {
    transform: perspective(150px) translateX(-50%) rotateZ(-120deg);
  }
  
  &:before {
    content:"";
    position:absolute;
    top:0;
    left:0;
    width:60%;
    height:100%;
    background-color:lighten($fanBladeColor, 5%);
    transform:skewX(8deg);
    border-radius:20px 0 0 0;
    transform-origin:100% 100%;
  } 
}
.center {
  position:absolute;
  border-radius:50%;
  left:50%;
  top:50%;
  width:25%;
  height:25%;
  transform:translate(-50%, -50%);
  background-color:$fanTrim;
  z-index:10;
  box-shadow :
    inset 1px 0px 0px 2px darken($fanTrim, 5%), 
    inset 2px 0px 0px 2px darken($fanTrim, 5%),
    inset 3px 0px 0px 2px darken($fanTrim, 5%),
    inset 4px 0px 0px 2px darken($fanTrim, 5%),
    inset 5px 0px 0px 6px darken($fanTrim, 5%),
    inset 6px 0px 0px 6px darken($fanTrim, 5%),
    inset 7px 0px 0px 6px darken($fanTrim, 5%),
    inset 8px 0px 0px 6px darken($fanTrim, 5%);
}

.cover {
  position:absolute;
  width:100%;
  height:100%;
  border-radius:50%;
  z-index:10;
  background-image: radial-gradient(circle, 
    transparent 20%, $fanMetal 20%, $fanMetal 22%, transparent 22%,
    transparent 40%, $fanMetal 40%, $fanMetal 42%, transparent 42%,
    transparent 60%, $fanMetal 60%, $fanMetal 62%, transparent 62%
  );
  
  &:before,
  &:after {
    content:"";
    height:100%;
    width:5px; 
    position:absolute;
    left:50%;
    top:0;
    transform-origin:50% 50%;
    background-color:$fanMetal;
  }
  
  &:before {
    transform:translateX(-50%) rotate(45deg);
  }
  &:after {
    transform:translateX(-50%) rotate(-45deg);
  }   
}

.support {
  position:absolute;
  z-index:1;
  width:60px;
  height:40%;
  top:150px;
  left:50%;
  background-color:$fanColor;
  transform-origin:50%, 100%;
  transform:perspective(100px) rotateX(15deg);
  outline: 1px solid transparent;
  
  &:before {
    content:"";
    position:absolute;
    left:0;
    top:0;
    width:30%;
    height:100%;
    background-color:darken($fanColor,5%);
  }
  
  &:after {
    content:"";
    position:absolute;
    top:-100px;
    left:-100px;
    height:125px;
    width:150px;
    border-radius: 50% 0 0 50%;
    background-color:darken($fanColor, 5%);
  }
}

.base {
  position:absolute;
  bottom:20px;
  left:55%;
  width:40%;
  height:40%;
  transform-origin:50% 50%;
  transform:translateX(-50%) scaleY(.2);
  background:$fanColor;
  border-radius:50%;
  z-index:0;
  box-shadow: 
    0px 20px 0px 1px darken($fanColor, 5%),
    0px 40px 0px 2px darken($fanColor, 5%),
    0px 60px 0px 3px darken($fanColor, 5%),
    0px 80px 0px 4px darken($fanColor, 5%),
    0px 100px 0px 5px darken($fanColor, 5%),
    0px 120px 0px 6px darken($fanColor, 5%),
    0px 140px 0px 7px darken($fanColor, 5%),
    0px 160px 0px 8px darken($fanColor, 5%),
    0px 180px 0px 9px darken($fanColor, 5%),
    0px 200px 0px 10px darken($fanColor, 5%),
    0px 220px 0px 11px darken($fanColor, 5%);
}

            
          
!
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