CSS

1.⭐️ Flex & Opacity

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2.🔛 css-fullscreen

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3.🧮 open-color

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4.➖ Border and Outline

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5.inline,block,inline-block 차이

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6.체크박스(input type="checkbox") 포커스될 때 생기는 파란색 테두리 제거하기

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