.window
  .windmill
    .pillar
    .dome
      .dome-window
    .windmill-window
    .blades
      - var bladeCount = 4;
      - var i = bladeCount;
      while (i--)
        .blade(class="blade-"+ (bladeCount - i))
    .ramp
      .grill
      - var hookCount = 4;
      - var i = hookCount;
      while (i--)
        .hook(class="hook-"+ (hookCount - i))
  .sun
  .land
  - var grassCount = 2;
  - var i = grassCount;
  while (i--)
    .grass(class="grass-"+ (grassCount - i))
  

:root {
  --sun-color: #FFBB10;
  --sky-color-1: #FBD788;
  --sky-color-2: #FFEFC0;
  --sky-color-3 : #E8BF62;
  --land-color-1: #62B144;
  --land-color-2: #3D9339;
  --grass-color-1: #37913B;
  --grass-color-2: #8BC435;
  --brick-color-1: #D58256;
  --brick-color-2: #CD7555;
  --wood-color-1: #623B39;
  --wood-color-2: #472A2A;
  --wood-color-3: #2E1D1D;
  --wood-color-4: #000000;
  --window-color-1: #E3E1E1;
  --window-color-2: #000000;
  --window-color-3: #FFFFFF;
  --mill-top-color: #C0C0C0;
  --mill-bottom-color-1: #8F3C31;
  --mill-bottom-color-2: #9C4B3D;
  --dome-color: #FFFFFF;
  --blade-color-1: #FD903D;
  --blade-color-2: #BE684F;
  --window-move-time: 2s;
  --land-slide-time: 2s;
  --blades-spin-time: 6s;
}

@keyframes window-move {
  0% {
    top: 47%;
  }
  100% {
    top: 53%;
  }
}

@keyframes window-bottom-move {
  0% {
    transform: scale(1);
    top: 0px;
  }
  100% {
    transform: scale(1.1);
    top: -10px;
  }
}

@keyframes blades-spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@keyframes land-slide {
  0% {
    transform: translateX(-50%) scale(0.95);
  }
  100% {
    transform: translateX(-50%) scale(1.05);
  }
}

body {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  margin: 0;
}

* {
  position: absolute;
  box-sizing: border-box;
  
  &::before, &::after {
    content: '';
    position: inherit;
    box-sizing: inherit;
  }
}

.window {
  width: 540px;
  height: 540px;
  left: 50%;
  top: 50%;
  transform-origin: 50% 50%;
  transform: translate(-50%, -50%) scale(1);
  border-radius: 50%;
  background: radial-gradient(farthest-side at 135px 340px, var(--sky-color-2) 135px, transparent 135px), radial-gradient(farthest-side at 405px 300px, var(--sky-color-1) 140px, transparent 135px), linear-gradient(to bottom, var(--sky-color-1) 320px, var(--sky-color-2) 320px);
  animation: window-move var(--window-move-time) ease-in-out infinite alternate;
  
  &::before {
    bottom: 0;
    left: 0;
    top: 0;
    right: 0;
    background: linear-gradient(to bottom, transparent 490px, var(--sky-color-3) 490px, var(--sky-color-3) 510px, var(--sky-color-1) 510px);
    border-radius: 50%;
    animation: window-bottom-move var(--window-move-time) ease-in-out infinite alternate;
  }
}

.land {
  width: 460px;
  height: 40px;
  background: var(--land-color-1);
  bottom: 40px;
  left: 50%;
  transform-origin: 50% 0%;
  transform: translateX(-50%) scale(1);
  border-radius: 20px 20px 5px 5px;
  border-bottom: 5px solid var(--land-color-2);
  z-index: 2;
  animation: land-slide var(--land-slide-time) ease-in-out infinite alternate;
}

.grass {
  background: transparent;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
}

@for $i from 0 to 2 {
  .grass-#{$i + 1} {
    z-index: $i + 1;
    width: #{20 * (3 -$i)}px;
    height: #{10 * (3 -$i)}px;
    border-radius: #{10 * (3 -$i)}px #{10 * (3 -$i)}px 0 0;
  }
}

.grass-1 {
  box-shadow: -90px 0 0 0 var(--grass-color-1), -130px 4px 0 -4px var(--grass-color-1), -165px 8px 0 -8px var(--grass-color-1),90px 0 0 0 var(--grass-color-1), 140px 4px 0 -4px var(--grass-color-1), 165px 8px 0 -8px var(--grass-color-1);
}

.grass-2 {
  box-shadow: -90px 0 0 0 var(--grass-color-2), -60px 2px 0 -2px var(--grass-color-2), -35px 5px 0 -5px var(--grass-color-2),  90px 0 0 0 var(--grass-color-2), 60px 2px 0 -2px var(--grass-color-2), 35px 5px 0 -5px var(--grass-color-2);
}

.windmill {
  width: 180px;
  height: 280px;
  left: 50%;
  bottom: 80px;
  transform: translateX(-50%);
  z-index: 2;

  &::before {
    top: 0px;
    background: var(--mill-top-color);
    left: 50%;
    transform: translateX(-50%);
    width: 130px;
    height: 30px;
    border-radius: 0 0 20px 20px / 0 0 45px 45px;
  }

  &::after {
    bottom: 0px;
    background: linear-gradient(to bottom, var(--mill-bottom-color-1) 25px, var(--mill-bottom-color-2) 25px, var(--mill-bottom-color-2) 45px, var(--mill-bottom-color-1) 45px);
    width: 100%;
    height: 50px;
  }
}

.windmill-window {
  left: 50%;
  top: 38%;
  transform: translate(-50%, -50%) scale(0.85, 0.95);
  width: 8px;
  height: 8px;
  background: transparent;
  box-shadow: 5px 25px 0 0 var(--window-color-2), -5px 25px 0 0 var(--window-color-2), 5px 35px 0 0 var(--window-color-2), -5px 35px 0 0 var(--window-color-2), 0 30px 0 5px var(--window-color-1), 0 30px 0 8px var(--window-color-3), 5px -25px 0 0 var(--window-color-2), -5px -25px 0 0 var(--window-color-2), 5px -35px 0 0 var(--window-color-2), -5px -35px 0 0 var(--window-color-2), 0 -30px 0 5px var(--window-color-1), 0 -30px 0 8px var(--window-color-3);
}

.pillar {
  background-image: linear-gradient(335deg, var(--brick-color-2) 6px, transparent 6px), linear-gradient(155deg, var(--brick-color-2) 6px, transparent 6px), linear-gradient(335deg, var(--brick-color-2) 6px, transparent 6px), linear-gradient(155deg, var(--brick-color-2) 6px, transparent 6px);
  background-size: 15px 15px;
  background-position: 0 0, 2px 9px, 7px 8px, 9px 1px;
  background-color: var(--brick-color-1);
  width: 100%;
  height: 200px;
  bottom: 50px;
  clip-path: polygon(20% 0%, 80% 0%, 100% 100%, 0 100%);
  box-shadow: inset 0 4px 0 0 var(--wood-color-1);
}

.dome {
  width: 110px;
  height: 65px;
  border-radius: 55px 55px 0 0;
  background: var(--dome-color);
  left: 50%;
  top: -65px;
  transform: translateX(-50%);
}

.dome-window {
  width: 24px;
  height: 26px;
  border-radius: 12px 12px 0 0;
  background: linear-gradient(to right, transparent 8px, var(--window-color-1) 8px, var(--window-color-1) 10px, transparent 10px), linear-gradient(to bottom, transparent 9px, var(--window-color-1) 9px, var(--window-color-1) 11px, transparent 11px), var(--window-color-2);
  border: 3px solid var(--window-color-1);
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);

  &::before {
    bottom: -4px;
    width: 32px;
    height: 2px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--window-color-1);
    box-shadow: 0 2px 0 0 var(--wood-color-1);
  }

}

.blades {
  z-index: -1;
  left: 50%;
  top: -30px;
  transform: translate(-50%, -50%) rotate(40deg);
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--wood-color-3);
  animation: blades-spin var(--blades-spin-time) linear infinite;
}

.blade {
  height: 60px;
  width: 200px;
  background: var(--blade-color-1);
  box-shadow: 0 5px 0 0 var(--blade-color-2), 0 -5px 0 0 var(--blade-color-2);
  transform-origin: -50px 15px;
  top: -5px;
  left: 60px;
  transform: rotate(0deg);

  &::before {
    height: 8px;
    width: 260px;
    border-radius: 5px;
    background: var(--wood-color-2);
    top: 11px;
    left: -55px;
  }

  &::after {
    height: 75px;
    width: 4px;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    border-radius: 2px;
    background: var(--wood-color-1);
    box-shadow: -33px 0 0 0 var(--wood-color-1), -67px 0 0 0 var(--wood-color-1), -100px 0 0 0 var(--wood-color-1), 33px 0 0 0 var(--wood-color-1), 67px 0 0 0 var(--wood-color-1), 100px 0 0 0 var(--wood-color-1);
  }
}

@for $i from 0 to 4 {
  .blade-#{$i + 1} {
    transform: rotate(#{90 * $i}deg);
  }
}

.ramp {
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  width: 240px;
  height: 35px;
  background: linear-gradient(to bottom, transparent 10px, var(--wood-color-4) 10px, var(--wood-color-4) 15px, transparent 15px), linear-gradient(to right, var(--wood-color-1) 32%, var(--wood-color-2) 32%, var(--wood-color-2) 66%, var(--wood-color-3) 66%);
  z-index: 2;

  &::before {
    height: 5px;
    width: 20px;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    background: transparent;
    box-shadow: -115px 0 0 0 var(--sky-color-2), 115px 0 0 0 var(--sky-color-1);
  }
}

.grill {
  height: 25px;
  width: 6px;
  top: -25px;
  background: transparent;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 2px 2px 0 0;
  box-shadow: -100px 0 0 0 var(--wood-color-1), -60px 0 0 0 var(--wood-color-1), -20px 0 0 0 var(--wood-color-2), 20px 0 0 0 var(--wood-color-2), 60px 0 0 0 var(--wood-color-3), 100px 0 0 0 var(--wood-color-3);

  &::before {
    width: 240px;
    height: 6px;
    top: 6px;
    background: linear-gradient(to right, var(--wood-color-2) 33%, var(--wood-color-3) 33%, var(--wood-color-3) 66%, var(--wood-color-4) 66%);
    left: 50%;
    transform: translateX(-50%);
  }
}

.hook {
  width: 8px;
  height: 24px;
  bottom: -24px;
  transform-origin: 0 0;

  &::before {
    background: var(--mill-bottom-color-1);
    width: 8px;
    height: 10px;
    bottom: 0;
    transform: skew(-50deg);
  }

  &::after {
    background: inherit;
    width: 8px;
    height: 10px;
    bottom: 0;
  }
}

$hooks: (2, 1, -1, -2);

@each $hook in $hooks {
  $i: index($hooks, $hook);
  .hook-#{$i} {
    background: var(--wood-color-#{$i});
    left : #{(32.5% * ($i - 1)) + $hook};
    transform: skew(#{25 * $hook}deg);

    &::before {
      right: #{-2.5 * $hook}px;
      transform: skew(#{-25 * $hook}deg);
    }
  }
}

.sun {
  right: 0;
  top: 80px;
  width: 140px;
  height: 140px;
  background: var(--sun-color);
  border-radius: 50%;
}

@media (max-width: 800px) {
  .window {
    transform: translate(-50%, -50%) scale(0.75);
  }
}

@media (max-width: 360px) {
  .window {
    transform: translate(-50%, -50%) scale(0.5);
  }
}

@media (min-width: 1920px) {
  .window {
    transform: translate(-50%, -50%) scale(1.25);
  }
}

// Inspired from design - https://dribbble.com/shots/3003860-Windmill