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HTML

              
                <input type="checkbox" role="switch" class="toggle" />
<input type="checkbox" role="switch" class="toggle" style="--angle: -45deg" />
<input type="checkbox" role="switch" class="toggle" style="--angle: 0deg" />
<input type="checkbox" role="switch" class="toggle" style="--angle: 90deg" />
<input type="checkbox" role="switch" class="toggle" disabled />
              
            
!

CSS

              
                .toggle {
  /* the speed at which each line slides in/out of the toggle */
  --speed: 0.4s;
  /* the delay between each line starting its animation*/
  --innerdelay: 0.05s;
  /* the delay between one box and the other animating*/
  --delay: 0.4s;
  /* the angle at which the lines will be */
  --angle: 45deg;
  --x0: 0.1em; --x1: 0.1em; --x2: 0.1em;
  --x3: 0.1em; --x4: 0.1em; --x5: 0.1em;
  --x6: 0.1em; --x7: 0.1em; --x8: 0.1em;
  --y0: 0.1em; --y1: 0.1em; --y2: 0.1em;
  --y3: 0.1em; --y4: 0.1em; --y5: 0.1em;
  --y6: 0.1em; --y7: 0.1em; --y8: 0.1em;
  --x10: -0.4em; --x11: -0.4em; --x12: -0.4em;
  --x13: -0.4em; --x14: -0.4em; --x15: -0.4em;
  --x16: -0.4em; --x17: -0.4em; --x18: -0.4em;
  --y10: -1.9em; --y11: -1.9em; --y12: -1.9em;
  --y13: -1.9em; --y14: -1.9em; --y15: -1.9em;
  --y16: -1.9em; --y17: -1.9em; --y18: -1.9em;
  appearance: none;
  position: relative;
  font-size: 1em;
  box-sizing: content-box;
  border: max(1px, 0.05em) solid currentcolor;
  width: 2.5em;
  height: 1em;
  color: currentcolor;
  transition:
      --x0 var(--speed) calc(var(--delay) + var(--innerdelay) * 0),
      --x1 var(--speed) calc(var(--delay) + var(--innerdelay) * 1),
      --x2 var(--speed) calc(var(--delay) + var(--innerdelay) * 2),
      --x3 var(--speed) calc(var(--delay) + var(--innerdelay) * 3),
      --x4 var(--speed) calc(var(--delay) + var(--innerdelay) * 4),
      --x5 var(--speed) calc(var(--delay) + var(--innerdelay) * 5),
      --x6 var(--speed) calc(var(--delay) + var(--innerdelay) * 6),
      --x7 var(--speed) calc(var(--delay) + var(--innerdelay) * 7),
      --x8 var(--speed) calc(var(--delay) + var(--innerdelay) * 8),
      --y0 var(--speed) calc(var(--delay) + var(--innerdelay) * 0),
      --y1 var(--speed) calc(var(--delay) + var(--innerdelay) * 1),
      --y2 var(--speed) calc(var(--delay) + var(--innerdelay) * 2),
      --y3 var(--speed) calc(var(--delay) + var(--innerdelay) * 3),
      --y4 var(--speed) calc(var(--delay) + var(--innerdelay) * 4),
      --y5 var(--speed) calc(var(--delay) + var(--innerdelay) * 5),
      --y6 var(--speed) calc(var(--delay) + var(--innerdelay) * 6),
      --y7 var(--speed) calc(var(--delay) + var(--innerdelay) * 7),
      --y8 var(--speed) calc(var(--delay) + var(--innerdelay) * 8),
      --x10 var(--speed) calc(var(--innerdelay) * 0),
      --x11 var(--speed) calc(var(--innerdelay) * 1),
      --x12 var(--speed) calc(var(--innerdelay) * 2),
      --x13 var(--speed) calc(var(--innerdelay) * 3),
      --x14 var(--speed) calc(var(--innerdelay) * 4),
      --x15 var(--speed) calc(var(--innerdelay) * 5),
      --x16 var(--speed) calc(var(--innerdelay) * 6),
      --x17 var(--speed) calc(var(--innerdelay) * 7),
      --x18 var(--speed) calc(var(--innerdelay) * 8),
      --y10 var(--speed) calc(var(--innerdelay) * 0),
      --y11 var(--speed) calc(var(--innerdelay) * 1),
      --y12 var(--speed) calc(var(--innerdelay) * 2),
      --y13 var(--speed) calc(var(--innerdelay) * 3),
      --y14 var(--speed) calc(var(--innerdelay) * 4),
      --y15 var(--speed) calc(var(--innerdelay) * 5),
      --y16 var(--speed) calc(var(--innerdelay) * 6),
      --y17 var(--speed) calc(var(--innerdelay) * 7),
      --y18 var(--speed) calc(var(--innerdelay) * 8);
 
  &::before {
    content: "";
    width: 0.8em;
    height: 0.8em;
    position: absolute;
    top: 0.1em;
    left: 0.1em;
    box-sizing: border-box;
    border: 0.15em solid #f000;
  }
  
  &::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
      /* off lines */
      linear-gradient(var(--angle), #0000  8%, currentcolor 0 12%, #0000 0) var(--x0) var(--y0),
      linear-gradient(var(--angle), #0000 18%, currentcolor 0 22%, #0000 0) var(--x1) var(--y1),
      linear-gradient(var(--angle), #0000 28%, currentcolor 0 32%, #0000 0) var(--x2) var(--y2),
      linear-gradient(var(--angle), #0000 38%, currentcolor 0 42%, #0000 0) var(--x3) var(--y3),
      linear-gradient(var(--angle), #0000 48%, currentcolor 0 52%, #0000 0) var(--x4) var(--y4),
      linear-gradient(var(--angle), #0000 58%, currentcolor 0 62%, #0000 0) var(--x5) var(--y5),
      linear-gradient(var(--angle), #0000 68%, currentcolor 0 72%, #0000 0) var(--x6) var(--y6),
      linear-gradient(var(--angle), #0000 78%, currentcolor 0 82%, #0000 0) var(--x7) var(--y7),
      linear-gradient(var(--angle), #0000 88%, currentcolor 0 92%, #0000 0) var(--x8) var(--y8),
      /* on lines */
      linear-gradient(var(--angle), #0000  8%, currentcolor 0 12%, #0000 0) var(--x10) var(--y10),
      linear-gradient(var(--angle), #0000 18%, currentcolor 0 22%, #0000 0) var(--x11) var(--y11),
      linear-gradient(var(--angle), #0000 28%, currentcolor 0 32%, #0000 0) var(--x12) var(--y12),
      linear-gradient(var(--angle), #0000 38%, currentcolor 0 42%, #0000 0) var(--x13) var(--y13),
      linear-gradient(var(--angle), #0000 48%, currentcolor 0 52%, #0000 0) var(--x14) var(--y14),
      linear-gradient(var(--angle), #0000 58%, currentcolor 0 62%, #0000 0) var(--x15) var(--y15),
      linear-gradient(var(--angle), #0000 68%, currentcolor 0 72%, #0000 0) var(--x16) var(--y16),
      linear-gradient(var(--angle), #0000 78%, currentcolor 0 82%, #0000 0) var(--x17) var(--y17),
      linear-gradient(var(--angle), #0000 88%, currentcolor 0 92%, #0000 0) var(--x18) var(--y18),
      #0000;
    background-size: 0.8em 0.8em;
    background-repeat: no-repeat;
  }
  
  &:checked {
    --x0: 2.1em; --x1: 2.1em; --x2: 2.1em;
    --x3: 2.1em; --x4: 2.1em; --x5: 2.1em;
    --x6: 2.1em; --x7: 2.1em; --x8: 2.1em;
    --y0: 2.1em; --y1: 2.1em; --y2: 2.1em;
    --y3: 2.1em; --y4: 2.1em; --y5: 2.1em;
    --y6: 2.1em; --y7: 2.1em; --y8: 2.1em;
    --x10: 1.6em; --x11: 1.6em; --x12: 1.6em;
    --x13: 1.6em; --x14: 1.6em; --x15: 1.6em;
    --x16: 1.6em; --x17: 1.6em; --x18: 1.6em;
    --y10: 0.1em; --y11: 0.1em; --y12: 0.1em;
    --y13: 0.1em; --y14: 0.1em; --y15: 0.1em;
    --y16: 0.1em; --y17: 0.1em; --y18: 0.1em;
    
    transition:
      --x0 var(--speed) calc(var(--innerdelay) * 0),
      --x1 var(--speed) calc(var(--innerdelay) * 1),
      --x2 var(--speed) calc(var(--innerdelay) * 2),
      --x3 var(--speed) calc(var(--innerdelay) * 3),
      --x4 var(--speed) calc(var(--innerdelay) * 4),
      --x5 var(--speed) calc(var(--innerdelay) * 5),
      --x6 var(--speed) calc(var(--innerdelay) * 6),
      --x7 var(--speed) calc(var(--innerdelay) * 7),
      --x8 var(--speed) calc(var(--innerdelay) * 8),
      --y0 var(--speed) calc(var(--innerdelay) * 0),
      --y1 var(--speed) calc(var(--innerdelay) * 1),
      --y2 var(--speed) calc(var(--innerdelay) * 2),
      --y3 var(--speed) calc(var(--innerdelay) * 3),
      --y4 var(--speed) calc(var(--innerdelay) * 4),
      --y5 var(--speed) calc(var(--innerdelay) * 5),
      --y6 var(--speed) calc(var(--innerdelay) * 6),
      --y7 var(--speed) calc(var(--innerdelay) * 7),
      --y8 var(--speed) calc(var(--innerdelay) * 8),
      --x10 var(--speed) calc(var(--delay) + var(--innerdelay) * 0),
      --x11 var(--speed) calc(var(--delay) + var(--innerdelay) * 1),
      --x12 var(--speed) calc(var(--delay) + var(--innerdelay) * 2),
      --x13 var(--speed) calc(var(--delay) + var(--innerdelay) * 3),
      --x14 var(--speed) calc(var(--delay) + var(--innerdelay) * 4),
      --x15 var(--speed) calc(var(--delay) + var(--innerdelay) * 5),
      --x16 var(--speed) calc(var(--delay) + var(--innerdelay) * 6),
      --x17 var(--speed) calc(var(--delay) + var(--innerdelay) * 7),
      --x18 var(--speed) calc(var(--delay) + var(--innerdelay) * 8),
      --y10 var(--speed) calc(var(--delay) + var(--innerdelay) * 0),
      --y11 var(--speed) calc(var(--delay) + var(--innerdelay) * 1),
      --y12 var(--speed) calc(var(--delay) + var(--innerdelay) * 2),
      --y13 var(--speed) calc(var(--delay) + var(--innerdelay) * 3),
      --y14 var(--speed) calc(var(--delay) + var(--innerdelay) * 4),
      --y15 var(--speed) calc(var(--delay) + var(--innerdelay) * 5),
      --y16 var(--speed) calc(var(--delay) + var(--innerdelay) * 6),
      --y17 var(--speed) calc(var(--delay) + var(--innerdelay) * 7),
      --y18 var(--speed) calc(var(--delay) + var(--innerdelay) * 8);
    
    &::before {
      left: 1.6em;
    }
  }
  
  &[disabled] {
    opacity: 0.25;
  }
}

@media print {
  .toggle {
    &, &::before, &::after {
      -webkit-print-color-adjust: exact;
      print-color-adjust: exact;
    }
  }
}

@media (prefers-reduced-motion) {
  .toggle {
    &, &::before, &::after {
      transition: none !important;
      animation: none !important;
    }
  }
}

@property --speed { syntax: '<time>'; initial-value: 0.4s; inherits: true; }
@property --innerdelay { syntax: '<time>'; initial-value: 0.05s; inherits: true; }
@property --delay { syntax: '<time>'; initial-value: 0.3s; inherits: true; }
@property --angle { syntax: '<angle>'; initial-value: 45deg; inherits: true; }
@property --x0 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --x1 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --x2 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --x3 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --x4 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --x5 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --x6 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --x7 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --x8 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y0 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y1 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y2 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y3 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y4 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y5 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y6 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y7 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y8 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --x10 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --x11 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --x12 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --x13 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --x14 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --x15 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --x16 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --x17 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --x18 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y10 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y11 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y12 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y13 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y14 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y15 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y16 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y17 { syntax: '<length>'; initial-value: 1px; inherits: true; }
@property --y18 { syntax: '<length>'; initial-value: 1px; inherits: true; }

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin: 0;
  min-height: 100vh;
  font-size: 50px;
  gap: 0.25em;
}
              
            
!

JS

              
                
              
            
!
999px

Console