diff --git a/css/check.css b/css/check.css
new file mode 100644
index 0000000..5192864
--- /dev/null
+++ b/css/check.css
@@ -0,0 +1,26 @@
+@charset "UTF-8";
+
+i.icon.check {
+	position: relative;
+	width: 22px;
+	height: 22px;
+	box-sizing: border-box;
+	display: block;
+	border-radius: 100px;
+	border: 2px solid transparent;
+
+	&::after {
+		position: absolute;
+		content: "";
+		top: -1px;
+		left: 3px;
+		width: 6px;
+		height: 10px;
+		box-sizing: border-box;
+		display: block;
+		border-width: 0 2px 2px 0;
+		border-style: solid;
+		transform-origin: bottom left;
+		transform: rotate(45deg);
+	}
+}