body {
	margin: 0;
}
ul {
	margin: 0;
	padding: 0;
	list-style-type: none;
}
p {
	margin: 0;
}
.contents {
	max-width: 630px;
	margin: 0 auto;
	padding: 20px;
	background: #ccc;
}
.title {
	margin: 1em 0;
	font-weight: bold;
}
.title:first-child {
	margin: 0 0 1em;
}
.flex_contents {
	display: flex;
	justify-content: space-between;
}
.c-flex-direction {
	display: flex;
	flex-direction: column;
	width: calc((100% - 2em) / 3);
}
.c-flex-direction p:first-child {
	background: lightgreen;
	text-align: center;
}
.c-flex-direction p:nth-child(2) {
	background: lightblue;
}
.c-flex-direction p:nth-child(3) {
	background: lightyellow;
	text-align: right;
}
.c-flex {
	flex: 1;
}
.c-flex2 {
	flex: 1 1 auto;
}
.c-flex-grow {
	flex-grow: 1;
}
.copyright {
	text-align: center;
	padding-top: 2em;
	font-size: 14px;
}