테두리 (border)

border-flat

border-radius-xs

border-radius-sm

border-radius-md

border-rounded

<div class="border-flat ex-border">
	border-flat
</div>
<div class="border-radius-xs ex-border">
	border-radius-xs
</div>
<div class="border-radius-sm ex-border">
	border-radius-sm
</div>
<div class="border-radius-md ex-border">
	border-radius-md
</div>
<div class="border-rounded ex-border">
	border-rounded
</div>