body {
	margin: 0;
}

/* flex */
.row {
	display: flex;
	flex-direction: row;
}
.column {
	display: flex;
	flex-direction: column;
}
.center {
	display: flex;
	align-items: center;
	justify-content: center;
}

/* css */
.pd0 {
	padding: 0;
}
.pd10 {
	padding: 10px;
}
.pd20 {
	padding: 20px;
}
.mr10 {
	padding: 0;
}
.mr10 {
	margin: 10px;
}
.mr20 {
	margin: 20px;
}

/* font*/
.t-center {
	text-align: center;
}


/* color*/
.red {
    color: red;
}
.orange {
    color: orange;
}
.yellow {
    color: yellow;
}
.blue {
    color: blue;
}
.green {
    color: green;
}