html {
	//font-size: 10px;
	//font-family: 'Open Sans', sans-serif;
}

h1 {
	//font-size: 60px;
	//text-align: center;
}

p {
	font-size: 15px;
	line-height: 28px;
	margin-bottom: 25px;
	margin-left: auto;
	margin-right: auto;
	width: 20em;
}

p, li {
	//font-size: 16px;
	//line-height: 2;
	//letter-spacing: 1px;
}

html {
	//background-color: #00539F;
}

body {
	//width: 600px;
	margin: 0 auto;
	color: #555;
	//background-color: #FF9500;
	//padding: 0 20px 20px 20px;
	//border: 5px solid black;
}

h1 {
	//margin: 0;
	//padding: 20px 0;
	//color: #00539F;
	//text-shadow: 3px 3px 1px black;
}

h4 {
	font-size: 18px;
	//line-height: 1.6 !important;
	color: #333;
	margin-left: auto;
	margin-right: auto;
	padding: .75em;
	padding-top: .75em;
	width: 4em
}

img {
	//display: block;
	//margin: 0 auto;
	max-width: 100%;
	max-height: 100%;
}

ul {
	list-style-type: none;
	margin: 0;
	padding: 0;
	overflow: hidden;
	background-color: #333;
}

li {
	float: left;
}

li a {
	display: block;
	color: white;
	text-align: center;
	padding: 14px 16px;
	text-decoration: none;
}

li a:hover:not(.active) {
	background-color: #111;
}

.active {
	background-color: #4CAF50;
}

.navigation {
	background-color: #333;
}

.title {
	font-size: 35px !important;
	line-height: 1.6 !important;
	text-align: center;
	max-width: 100%;
	max-height: 100%;
	color: #333;
}

.subtitle {
	font-size: 24px !important;
	line-height: 1.6 !important;
	text-align: center;
	max-width: 100%;
	max-height: 100%;
	color: #444;
}

.summery {
	font-size: 18px !important;
	line-height: 1.6 !important;
	text-align: center;
	max-width: 100%;
	max-height: 100%;
	color: #555;
	width: 20em
}

.detail {
	font-size: 18px !important;
	line-height: 1.6 !important;
	text-align: center;
	max-width: 100%;
	max-height: 100%;
	color: #555;
	width: 20em
}

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	font-family: Arial;
}

.header {
	text-align: center;
	padding: 32px;
}

.row {
	display: flex;
	flex-wrap: wrap;
	padding: 0 4px;
}

.column {
	flex: 25%;
	max-width: 25%;
	//padding: 0 4px;
}

@media screen and (max-width: 80em) {
	.column {
		flex: 50%;
		max-width: 50%;
	}
}

@media screen and (max-width: 40em) {
	.column {
		flex: 100%;
		max-width: 100%;
	}
}

.tutorial {
    //background-color: blue;
}

.row img {
    margin: auto;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    max-width: 100%;
    height: auto;
}

.policy {
    font-size: 18px !important;
    line-height: 1.6 !important;
    text-align: center;
    max-width: 100%;
    max-height: 100%;
    color: #555;
    width: 60em
}