*{
	padding: 0;
	margin: 0;
	box-sizing: border-box;
}
body{
	font-family: 'Nanum Gothic', sans-serif;
}
.main_container{
	width: 100%;
	height: 100vh;
}
.items_container{
	width: 100vw;
	height: 100vh;
	position: relative;	
	background-image: url("../images/intro.jpg");
	background-size: cover;
	background-position: center center;	
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	text-align: center;	
}
.menu{
	width: 100%;
	position: absolute;
	top: 0;
	left: 0;
	display: flex;
	align-items: center;
}
.menu ul{
	width: 100%;
	display: flex;
	justify-content: flex-end;
	align-items: center;
}
.menu ul li{
	margin: 20px;
	list-style-type: none;
}
.menu ul li a{
	text-decoration: none;
	margin: 10px;
	color: #000;
	font-weight: bolder;
	font-size: 20px;
	cursor: pointer;
	background-color: transparent;
    background-image: linear-gradient(currentColor, currentColor);
    background-position: 0% 100%;
    background-repeat: no-repeat;
    background-size: 0% 2px;
    transition: background-size .3s;
}
.menu ul li a:hover, a:focus {
    background-size: 100% 2px;
    cursor: pointer;
}
.intro{
	width: 80%;
}
.intro h1{	
	color: #000;
	padding: 5px;
}
.intro p{
	color: #000;
	font-size: 25px;
	font-weight: bold;
	padding: 5px;
}
.wave{
	width: 100%;
	position: absolute;
	bottom: 0;
	overflow: hidden;		
}
@media screen and (max-width: 800px){
	.intro h1,.intro p{
		font-size: 25px;
		font-weight: bold;
	}
}
@media screen and (max-width: 400px){
	.intro h1,.intro p{
		font-size: 15px;
		font-weight: bold;
	}
}