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AI solution for CSS coding question on
6. different checkbox style

.my-checkbox input[type="checkbox"] { display: none; }

.my-checkbox span:before { content: ""; display: inline-block; vertical-align: middle; width: 10px; height: 10px; border-radius: 5px; border: 1px solid gray; margin-right: 5px; }

.my-checkbox input[type="checkbox"]:checked + span:before { border-color: green; }