Bootstrap / buttons / 버튼 꾸미기 / 버튼 종류

		<div class="container">
			<div class="row">
				<div class="col">
					<h1>Button</h1>
					<button type="button" class="btn btn-primary">Primary</button>
					<button type="button" class="btn btn-secondary">Secondary</button>
					<button type="button" class="btn btn-success">Success</button>
					<button type="button" class="btn btn-danger">Danger</button>
					<button type="button" class="btn btn-warning">Warning</button>
					<button type="button" class="btn btn-info">Info</button>
					<button type="button" class="btn btn-light">Light</button>
					<button type="button" class="btn btn-dark">Dark</button>
					<button type="button" class="btn btn-link">Link</button>
				</div>
			</div>
		</div>