/*----- nav -----*/
.nav_area{
  position: -webkit-sticky;
  position:         sticky;
  top: 0;
	z-index: 20;
}

nav{
	display: block;
	position:relative;
}
nav ul.main li a.emphasis{
	background-image: none;
	background-color: rgb(255,255,0);
	box-shadow: 0 0 4px rgba(0,0,0,.3);
	color: rgb(250,80,80);
}
nav ul.main li a.bg_blue{
	background-image: none;
	background-color: rgb(142,184,255);
	box-shadow: 0 0 4px rgba(0,0,0,.3);
}

nav ul.main li.disabled a {
    pointer-events: none;
    cursor: default;
    color: rgb(197, 197, 197);
    background: url(../img/common_deco03.svg) left .2rem center no-repeat rgb(238, 238, 238);
}

nav #sp_menu_button{
	display:none;
}
nav #sp_menu_button + label{
	box-sizing:border-box;
	position:fixed;
	top:18px;
	right:20px;
	display:none;
	padding:10px 8px;
	width:40px;
	background:rgb(58,76,101);
	color:rgb(255, 255, 255);
	transition:.2s ease-out;
	transition-property:border-color,box-shadow,transform;
	z-index:1600;
}
nav #sp_menu_button + label span{
	box-sizing:border-box;
	display:block;
	margin:0 auto;
	width:100%;
	height:3px;
	background:rgb(255,255,255);
	transition:.2s ease-out;
	transition-property:width,height,margin,box-shadow,transform;
	overflow:hidden;
}
nav #sp_menu_button + label span:nth-child(1),
nav #sp_menu_button + label span:nth-child(2){
	margin-bottom:5px;
}
	/*---- cheked ----*/
	nav #sp_menu_button:checked + label{
		/*transform:rotate(90deg);*/
		box-shadow:0 0 8px rgba(255,255,255,.45);
	}
	nav #sp_menu_button:checked + label span:nth-child(2){
		background:rgba(0,0,0,0);
		width:20px;
		height:20px;
		text-shadow:0 0 8px rgba(255,255,255,.6);
	}
	nav #sp_menu_button:checked + label span:nth-child(2)::before{
		content:"×";
		display:block;
		font-size:20px;
		line-height:20px;
		text-align:center;
	}
	nav #sp_menu_button:checked + label span:nth-child(1),
	nav #sp_menu_button:checked + label span:nth-child(2){
		margin-bottom:0;
	}
	nav #sp_menu_button:checked + label span:nth-child(1),
	nav #sp_menu_button:checked + label span:nth-child(3){
		height:0;
	}

nav ul.main{
	box-sizing:border-box;
	padding:0;
	width: 1174px;
	max-width: 100%;
	text-align: center;
	margin: 0 auto;
	height: 80px;
    background: rgb(19, 46, 62);
	display: grid;
	grid-auto-flow: column;
}
nav ul.main li{
	display:block;
	list-style:none;
}
nav ul.main li a {
    height: 80px;
    position: relative;
    box-sizing: border-box;
    display: table-cell;
    margin: 0;
    font-size: 1rem;
    background: rgb(19, 46, 62);
    color: rgba(255,255,255,1.00);
    line-height: 1.4;
    text-decoration: none;
    transition: .2s ease-out;
    transition-property: border-bottom,color;
    overflow: hidden;
    width: 111px;
    padding: 1em 0;
    border-right: solid 1px rgba(240,240,240,1.00);
    vertical-align: middle;
}
nav ul.main li:nth-child(1) a{
	border-left: solid 1px rgba(240,240,240,1.00);
}
/*新規ページを作成したら↓に新規ページのクラス名を追加
　例） .（クラス名）　nav ul.main li a.(クラス名)*/
.home nav ul.main li a.home,
.message nav ul.main li a.message,
.overview nav ul.main li a.overview,
.program nav ul.main li a.program,
.abstract nav ul.main li a.abstract,
.registration nav ul.main li a.registration,
.sponsor nav ul.main li a.sponsor,
.access nav ul.main li a.access,
.inquiry nav ul.main li a.inquiry,
.seminar nav ul.main li a.seminar,
.media nav ul.main li a.media,
.poster-flyer nav ul.main li a.poster-flyer,
nav ul.main li a.current,
nav ul.main li a:hover{
	background: url("../img/common_deco01.svg") bottom 0.6rem center no-repeat rgb(189, 152, 71);
	background-size: 10px 6px;
	color: rgb(0,0,0);
}

nav ul.main li a:hover::before,
nav ul.main li a.current::before{
	left:.2rem;
}
nav ul li.banner{
	margin-top:20px;
	padding: 0 16px;
}
nav ul li.banner.poster{
	padding: 0;
}
nav ul li.banner a{
	height: auto;
}
nav ul li.banner + .banner{
	margin-top:5px;
}
nav ul li.banner a{
	padding:0;
	border-bottom:none;
	line-height:0;
	text-align:center;
	transition:opacity .2s ease-out;
	background-color: rgba(255,255,255,0);
}
nav ul li.banner.poster a{
	padding: 16px;
	line-height: 1.6em;
	background-image: none;
}
nav ul li.banner a img{
	width:100%;
	vertical-align:bottom;
}
nav ul li.banner a img.sp{
	display:none;
	max-width:500px;
}
nav ul li.banner a:hover{
	background:none;
	border-bottom:none;
	opacity:.5;
}
nav ul li.banner.poster a:hover{
	background:rgb(242, 242, 240);
	opacity: 1;
}
nav ul p.abstract_note{
	font-size:1.2rem;
	line-height: 1.5rem;
	color:rgb(255,0,0);
	margin-top: 0.8rem;
}

nav ul li a[target="_blank"]::after{
	content:"";
	display:inline-block;
	background:url(../img/icon_external_white.svg) center center no-repeat;
	background-size:cover;
	width:.8em;
	height:.8em;
	margin-left:.5em;
	transition:background .2s ease-out;
}
	nav ul li a[target="_blank"]:hover::after{
		content:"";
		display:inline-block;
		background-size:cover;
	}
nav ul li.banner a:hover::after,
nav ul li.banner a::after{
	content: none;
}

/*-----------------------------------
-----------------------------------
	メディアクエリ
-----------------------------------
-----------------------------------*/
/*--1174px--*/
@media screen and (max-width:1174px){
	
nav ul.main li a{
	font-size: .9vw;
}
	
}
/*--1000px--*/
@media screen and (max-width:1000px){
/*--nav--*/
	nav{
	}
	nav ul li a{
		padding:1em 1em!important;
		font-size: 1.1rem!important;
	}
/*--nav--*/
	nav.main{
		position:fixed;
		top:0;
		right:0;
		z-index:100;
	}
	nav .sp_nav{
		box-sizing:border-box;
		position:fixed;
		display:flex;
		flex-wrap:wrap;
		justify-content:space-between;
		right:-110%;
		padding:20px 10px;
		width:100%;
		height: calc(100vh - 12rem);
		overflow: scroll;
		background:rgba(140, 180, 200, .8);
		transition:right .3s ease-out;
		z-index:1500;
	}
	nav ul.sub{
		position:relative;
		display:flex;
		top:auto;
		right:auto;
		box-sizing:border-box;
		flex-wrap:wrap;
		justify-content:space-between;
		margin:0;
		padding:0;
		width:100%;
		background:none;
		box-shadow:none;
		text-align:center;
		z-index:100;
	}
	nav ul.sub li{
		box-sizing:border-box;
		border:none;
		list-style:none;
		margin:0 0 10px 0;
		width:49%;
	}
	nav ul.sub li:last-child{
		margin:0 0 10px 0;
	}
	nav ul.main{
		position:relative;
		display:flex;
		top:auto;
		right:auto;
		box-sizing:border-box;
		flex-wrap:wrap;
		justify-content:space-between;
		margin:0;
		padding:0;
		width:100%;
		height: 100%;
		box-shadow:none;
		text-align:center;
		z-index:100;
	}
	nav ul.main li{
		box-sizing:border-box;
		border:none;
		list-style:none;
		margin:0 0 10px 0;
		width:100%
			;
	}
	nav ul.main li a{
		display:flex;
		flex-wrap:wrap;
		justify-content:center;
		align-items:center;
		align-content:center;
		line-height:1.2;
		font-size: 1.5rem!important;
		height: auto;
		width: auto;
	}
	nav ul.main li a br{
		display:none;
	}
	nav #sp_menu_button + label{
		display:block;
	}
		/*---- cheked ----*/
		nav #sp_menu_button:checked + label + .sp_nav{
			right:0;
		}
		/*---- cheked ----*/
		nav #sp_menu_button:checked ~ .sp_nav .close_field{
			position:fixed;
			top:0;
			left:0;
			display:block;
			width:100vw;
			height:100vh;
			background:rgba(0,0,0,.3);
			z-index:50;
		}
	nav ul.main li a.current::after {
		content: none;
}
	

}

/*--600px--*/
@media screen and (max-width:600px){
/*--nav--*/
	nav #sp_menu_button + label{
		top:5px;
		right:10px;
	}

	nav ul p.abstract_note{
		display: none;
	}
	nav ul.main li a{
		font-size: 1.5em!important;
	}
}
/*--400px--*/
@media screen and (max-width:400px){
/*--nav--*/
	nav #sp_menu_button + label{
		top:0;
		right:0;
	}

}