​x
 
1
<!DOCTYPE html>
2
<title>Example</title>
3
<style>
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    input[type="checkbox"]:checked {
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        box-shadow: 0 0 10px 3px deeppink;
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        background: deeppink;
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    }
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</style>
9
​
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<input type="checkbox" id="example">
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<label for="example">Check this</label>