Grafikart/index.html

## index.html
<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <link rel="icon" type="image/svg+xml" href="/vite.svg" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>CSSBattle canvas</title>
  <style>
    :root {
      --image: url("https://cssbattle.dev/targets/97@2x.png")
    }

    html,
    body {
      font-size: 18px;
      color: hsl(0 0% 100% / .4);
    }

    body {
      margin: 0;
      padding: 0;
      display: grid;
      grid-template-columns: repeat(auto-fit, 400px);
      justify-content: center;
      gap: 40px 20px;
      background: hsl(235 19% 13%);
      padding-top: 40px;
      font-family: sans-serif;
    }

    #main::after {
      display: none;
    }

    .canvas {
      width: 400px;
      height: 300px;
      position: relative;
    }

    .canvas::before {
      position: absolute;
      top: -1.4rem;
      left: 0;
    }

    #main::before {
      content: 'Rendu';
    }

    .ref::before {
      content: 'Référence';
    }

    .diff::before {
      content: 'Différence';
    }

    .overlay::before {
      content: 'Superposition';
    }

    .canvas::after {
      content: '';
      position: absolute;
      inset: 0;
      background: var(--image) center center / 100% 100% no-repeat;
    }

    .overlay::after {
      opacity: .2;
    }

    .diff::after {
      mix-blend-mode: difference;
    }
  </style>
</head>

<body>
  <div class="canvas" id="main">

    <!-- Le challenge commence ici -->

    <div class="demo"></div>

    <!-- / Fin challenge -->

  </div>
  <div class="canvas ref"></div>
  <div class="canvas diff"></div>
  <div class="canvas overlay"></div>
  <script>
    const sourceHTML = document.querySelector('#main').innerHTML

    document.querySelectorAll('.canvas').forEach(c => {
      c.innerHTML = sourceHTML
    })
  </script>
</body>

</html>
	<!DOCTYPE html>
	<html lang="en">

	<head>
	<meta charset="UTF-8" />
	<link rel="icon" type="image/svg+xml" href="/vite.svg" />
	<meta name="viewport" content="width=device-width, initial-scale=1.0" />
	<title>CSSBattle canvas</title>
	<style>
	:root {
	--image: url("https://cssbattle.dev/targets/97@2x.png")
	}

	html,
	body {
	font-size: 18px;
	color: hsl(0 0% 100% / .4);
	}

	body {
	margin: 0;
	padding: 0;
	display: grid;
	grid-template-columns: repeat(auto-fit, 400px);
	justify-content: center;
	gap: 40px 20px;
	background: hsl(235 19% 13%);
	padding-top: 40px;
	font-family: sans-serif;
	}

	#main::after {
	display: none;
	}

	.canvas {
	width: 400px;
	height: 300px;
	position: relative;
	}

	.canvas::before {
	position: absolute;
	top: -1.4rem;
	left: 0;
	}

	#main::before {
	content: 'Rendu';
	}

	.ref::before {
	content: 'Référence';
	}

	.diff::before {
	content: 'Différence';
	}

	.overlay::before {
	content: 'Superposition';
	}

	.canvas::after {
	content: '';
	position: absolute;
	inset: 0;
	background: var(--image) center center / 100% 100% no-repeat;
	}

	.overlay::after {
	opacity: .2;
	}

	.diff::after {
	mix-blend-mode: difference;
	}
	</style>
	</head>

	<body>
	<div class="canvas" id="main">

	<!-- Le challenge commence ici -->

	<div class="demo"></div>

	<!-- / Fin challenge -->

	</div>
	<div class="canvas ref"></div>
	<div class="canvas diff"></div>
	<div class="canvas overlay"></div>
	<script>
	const sourceHTML = document.querySelector('#main').innerHTML

	document.querySelectorAll('.canvas').forEach(c => {
	c.innerHTML = sourceHTML
	})
	</script>
	</body>

	</html>