@charset "utf-8";


:root {
	--header-opacity: 0;
}

#header {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	background-color: rgba(255, 255, 255, var(--header-opacity));
	transition: background-color 0.1s ease-out;
	z-index: 1000;
}

#header:hover {
	background-color: #fff;
}


.quick_menu.fixed {
	top: 116px;
}


#welcome-section {
	display: flex;
	align-items: center;
	align-self: stretch;

	width: 100%;
	aspect-ratio: 940/321;
	max-height: 650px;
	padding-bottom: 90px;
	background: url(../../../resource/images/main/main_bg_01.png) lightgray 0px 30% / 108.781% 204.046% no-repeat;
	background-size: cover;
}

#welcome-section > .container h1 {
	color: #2B2B2B;
	font-size: clamp(18px, 4vw, 36px);
	font-weight: 600;
	line-height: 1.5;
}


#welcome-section > .container h2 {
	color: #2B2B2B;
	font-size: clamp(22px, 4.5vw, 48px);
	font-weight: 700;
	line-height: 120%; /* 57.6px */
}

.query-input-group {
	display: flex;
	align-items: center;
	align-self: stretch;
	gap: 8px;
	width: 800px;
	padding: 12px;
	margin-top: 45px;
	border-radius: 50rem;
	background: rgba(255, 255, 255, 0.90);
	backdrop-filter: blur(3px);
	max-width: 100%;
}

.query-input-group > span {
	display: flex;
	flex-shrink: 0;
	width: 36px;
	height: 36px;
	padding: 0 10px;
	justify-content: center;
	align-items: center;
	border-radius: 99px;
	background: rgba(var(--ma-primary-rgb), 0.20);
	position: relative;
}


.query-input-group > span::before {
	display: block;
	width: 14px;
	height: 14px;
	content: "";
	position: absolute;
	left: 11px;
	top: calc(50% - 7px);

	background-image: url(../../images/con_com/ico_ai.svg);
	background-repeat: no-repeat;
	background-position: center;
}

.query-input-group > input {
	flex-grow: 1;
	padding: 5px 10px;
	border: none;
	background: transparent;
	font-size: 16px;
	width: 100%;
}

.query-input-group > button {
	flex-shrink: 0;
	padding: 9.5px 16px 9.5px 36px;
	border-radius: 50rem;
	color: #fff;
	font-size: 14px;
	font-weight: 600;
	background-color: var(--ma-primary-hex);
	position: relative;
}

.query-input-group > button::before {
	display: block;
	width: 14px;
	height: 14px;
	content: "";
	position: absolute;
	left: 16px;
	top: calc(50% - 7px);

	background-image: url(../../images/con_com/ico_send.svg);
	background-repeat: no-repeat;
	background-position: center;
}



#lecture-list-section {
	background: #fff;
}

#lecture-list-section > .container {
	padding: 66px 0 175px;
}

#lecture-list-section > .container > h2 {
	font-size: 24px;
	font-weight: 700;
	line-height: 1.2;
	margin-bottom: 24px;
}

#lecture-list-section .card-body {
	gap: 0;
}

#lecture-list-section .card-title a::after {
	position: absolute;
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
	z-index: 1;
	content: "";
}
@media screen and (max-width:1540px){
	#welcome-section {
		background: url(../../../resource/images/main/main_bg_01.png) 50% 25%/ 140% no-repeat;
		padding-top: 110px;
	}
}

@media screen and (max-width:1240px) {
	#welcome-section {
		background: url(../../../resource/images/main/main_bg_01.png) 50% 20%/ 220% no-repeat;
	}
}
@media screen and (max-width:768px) {
	#welcome-section {
		background : url(../../../resource/images/main/main_bg_01.png) lightgray 40% 30% / 350% no-repeat;
	}
}

@media screen and (max-width:580px) {
	#welcome-section .search-text{
		display: none;
	}
	
	.query-input-group > button {
		padding: 9.5px 13px 9.5px 27px;
	}
	
	.query-input-group > button::before{
		left: 13px;
	}
}