body {
	visibility: hidden;
	position: relative;
}

body > .pop-overlay {
	display: none;
	position: absolute;
	width: 100%;
	height: 100%;
	background-color: rgba(0, 0, 0, 0.5);
	z-index: 20;
}

header .help {
	position: absolute;
	right: 40px;
	top: 40px;
	background: none;
	width: 54px;
	height: 54px;
	border: none;
	padding: 0;
}

.header-content {
}
.header-content .title {
	left: 188px;
	top: 63px;
	position: absolute;
}
.header-content .title > span {
	font-family: 'GangwonEduPower';
	font-size: 32px;
	color: #000;
	margin-left: 18px;
}
.header-content .title h1 {
	font-size: 82px;
	color: #000;
	margin-top: 10px;
	font-family: 'GangwonEduPower';
	display: flex;
	gap: 10px;
}
.header-content .title h1 span {
	color: #005e6b;
	font-size: 78px;
	font-family: 'GangwonEduPower';
	background: url('../../img/2/math/title_bg.png') no-repeat center center / cover;
	width: 196px;
	height: 93px;
	display: flex;
	align-items: center;
	justify-content: center;
	margin-top: -10px;
}
.header-content .menu {
	position: absolute;
	right: 236px;
	top: 121px;
	display: flex;
	align-items: center;
	justify-content: flex-end;
}
.header-content .menu button {
	border: none;
	cursor: pointer;
	text-indent: -9999px;
	overflow: hidden;
	margin-left: 18px;
}
.header-content .menu button.btn-menu1 {
	width: 215px;
	height: 92px;
	background: url('../../img/2/math/btn_bg.png') no-repeat center center / cover;
}
.header-content .menu button.btn-menu2 {
	width: 264px;
	height: 92px;
	background: url('../../img/2/math/btn_bg2.png') no-repeat center center / cover;
}
.header-content .menu button.btn-menu3 {
	width: 288px;
	height: 92px;
	background: url('../../img/2/math/btn_bg3.png') no-repeat center center / cover;
}

.character {
	position: absolute;
	left: 15px;
	bottom: 43px;
	background: url('../../img/2/math/ch_b.png') no-repeat center center / cover;
	width: 170px;
	height: 183px;
	z-index: 11;
}
.character2 {
	position: absolute;
	left: 550px;
	bottom: 57px;
	background: url('../../img/2/math/ch_g.png') no-repeat center center / cover;
	width: 163px;
	height: 197px;
	z-index: 11;
}

.character3 {
	position: absolute;
	left: 700px;
	top: 125px;
	background: url('../../img/2/math/ch_p.png') no-repeat center center / cover;
	width: 133px;
	height: 158px;
}

.character4 {
	position: absolute;
	right: 77px;
	top: 280px;
	background: url('../../img/2/math/ch_y.png') no-repeat center center / cover;
	width: 181px;
	height: 201px;
}

.character5 {
	position: absolute;
	right: 20px;
	bottom: 235px;
	background: url('../../img/2/math/ch_o.png') no-repeat center center / cover;
	width: 171px;
	height: 190px;
	z-index: 11;
}
main {
	display: flex;
	justify-content: flex-start;
	align-items: flex-start;
}

.sidebar {
	position: relative;
	position: absolute;
	left: 67px;
	bottom: 60px;
	width: 600px;
	height: 806px;
	box-sizing: border-box;
	z-index: 10;
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 7px;
	padding: 45px 0 0;
}
.sidebar::before {
	content: '';
	display: block;
	width: 428px;
	height: 680px;
	background: url('../../img/2/math/bg_box.png') no-repeat left bottom;
	position: absolute;
	left: 70px;
	bottom: 132px;
	z-index: 2;
}
.sidebar::after {
	content: '';
	display: block;
	width: 659px;
	height: 828px;
	background: url('../../img/2/math/bg_box_bg.png') no-repeat left bottom;
	position: absolute;
	left: 50%;
	bottom: 0px;
	transform: translateX(-50%);
}
.sidebar > * {
	width: 400px;
}

.menu-item-list {
	position: relative;
	bottom: 18px;
}
.menu-item {
	position: relative;
	display: flex;
	align-items: center;
	justify-content: flex-start;
	align-items: center;
	cursor: pointer;
	height: 70px;
	width: 372px;

	box-sizing: border-box;
	/* transition: all 0.3s ease; */
	z-index: 2;
	font-size: 30px;
	color: #fff;
	gap: 10px;
	margin: 5px 0;
}

.menu-item .icon {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 58px;
	height: 58px;
	transition: all 0.3s ease;
}
.menu-item .text {
	font-weight: 700;
	/* text-wrap: nowrap; */
	line-height: 34px;
	width: 300px;
	word-break: keep-all;
}
.menu-item .arrow {
	position: absolute;
	right: 30px;
	top: 50%;
	transform: translateY(-50%);
	height: 34px;
	width: 49px;
	display: none;
}

.menu-item.active {
	width: 482px;
	height: 70px;
	background: #fff;
	border-radius: 35px;

	/* 위치조정 */
	position: relative;
	right: 50px;
}
.menu-item.active {
	padding-left: 55px;
	color: #004b50;
}
.menu-item.active .icon {
}
.menu-item.active .arrow {
	display: block;
}
.menu-item-title {
	color: #fff;
	font-size: 30px;
	position: relative;
	font-family: 'onemobile';
	z-index: 11;
	padding-left: 30px;
	box-sizing: border-box;
}

.menu-item-title::before {
	content: '';
	display: block;
	width: 14px;
	height: 14px;
	background: #ffcb03;
	position: absolute;
	left: 4px;
	top: 50%;
	transform: translateY(-50%);
	border-radius: 30px;
}

.content {
	width: 1160px;
	height: 785px;
	background: url('../../img/2/math/bg_box2.png') no-repeat left top;
	position: relative;
	position: absolute;
	right: 141px;
	bottom: 61px;
	padding: 55px 60px;
	box-sizing: border-box;
}

.lesson-header {
	display: flex;
	justify-content: flex-end;
	position: absolute;
	right: 108px;
	top: 21px;
	gap: 8px;
}
.lesson-header span {
	width: 95px;
	height: 32px;
	display: flex;
	align-items: center;
	justify-content: center;
	border-radius: 0 0 16px 16px;
	font-size: 18px;
	font-family: 'Cafe24Ssurround';
}
.lesson-header .e-book {
	color: #0044dd;
	/* background: #c4e6fe; */
	background: url(../../img/2/math/ebook_bg.png) no-repeat center / contain;
}
.lesson-header .pc {
	color: #005c4e;
	/* background: #cef6e6; */
	background: url(../../img/2/math/lesson_bg.png) no-repeat center / contain;
}

.lesson-wrap {
	overflow-y: auto;
	overflow-x: hidden;
	width: 1015px;
	height: 510px;
	display: flex;
	flex-direction: column;
	align-items: flex-start;
	justify-content: flex-start;
	padding-right: 12px;
	display: none;
	gap: 3px;
}

.lesson {
	width: 993px;
	padding: 10px 12px;
	display: flex;
	align-items: flex-start;
	justify-content: flex-start;
	border-radius: 30px;
	box-sizing: border-box;
}

.lesson-head {
	font-weight: bold;
	color: #015b4d;
	border: 2px solid #00a38a;
	font-size: 20px;
	width: 120px;
	height: 38px;
	display: flex;
	align-items: center;
	justify-content: center;
	border-radius: 19px;
	background: #fff;
	font-family: 'Cafe24Ssurround';
}

.lesson-body {
	font-size: 28px;
	flex: 1;
	line-height: 1.32;
	font-family: 'Noto Sans KR';
	font-weight: 700;
	margin-left: 10px;
	margin-right: 30px;
	letter-spacing: -0.04em;
	word-break: keep-all;
}
.lesson-foot {
	width: 180px;
	align-self: center;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 10px;
}
.lesson-foot a {
	width: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	height: 42px;
}
.lesson.active {
	background: #fff9c6;
}
.lesson.active .lesson-head {
	background-color: #00a38a;
	color: #fff;
}

footer {
	position: absolute;
	right: 244px;
	bottom: 138px;
	display: flex;
	justify-content: space-between;
	align-items: center;
	width: 954px;
}
.footer-content {
}
.footer-content-left {
	background: url('../../img/2/math/btn_bottom_bg2.png') no-repeat left top;
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 7px 7px 7px 20px;
	height: 47px;
	border-radius: 30px;
	box-sizing: border-box;
	width: 351px;
	gap: 16px;
}
.footer-content .btn-progress {
	font-family: 'Cafe24Ssurround';
	font-weight: 700;
	font-size: 22px;
	color: #333333;
	display: flex;
	align-items: center;
	justify-content: space-between;
	border-radius: 16px;
	height: 32px;
	width: 183px;
	font-weight: 900;
	padding: 2px;
	padding-left: 20px;
	box-sizing: border-box;
}
.footer-content .btn-progress .text {
	padding-top: 2px;
}
.footer-content .btn-progress em {
	color: #979ba8;
}
.footer-content button {
	border: none;
	cursor: pointer;
	background: none;
	margin: 0;
	padding: 0;
	height: 28px;
}
.footer-content .e-book-icon {
	font-size: 22px;
	color: #ffffff;
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 10px;
	font-family: 'Cafe24Ssurround';
	font-weight: 700;
}
.btn-go {
	margin: 0;
	padding: 0;
}

.footer-content-right {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 20px;
}

.footer-content-right button {
	width: 149px;
	height: 47px;
	border-radius: 23px;
	background: url('../../img/2/math/btn_bottom_bg.png') no-repeat left top;
	box-sizing: border-box;
	padding: 0;
	gap: 10px;
	font-size: 22px;
	color: #fff;
	font-family: 'Noto Sans KR';
	font-weight: 700;
	letter-spacing: -0.04em;
	line-height: 46px;
	vertical-align: top;
}
.footer-content-right button img {
	margin-right: 8px;
	position: relative;
	top: 3px;
}
.lesson-wrap::-webkit-scrollbar {
	width: 16px;
	position: absolute;
	right: 0;
}

.lesson-wrap::-webkit-scrollbar-thumb {
	background: #3ab0ae url('../../img/2/society/scroll.png') no-repeat center center;
	border-radius: 8px;
	width: 16px;
	/* box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.2), 3px 3px 10px 3px rgba(0, 0, 0, 0.15); */
}

.lesson-wrap::-webkit-scrollbar-track {
	background-color: #ededed;
	width: 6px;
	border-radius: 3px;
}
.lesson-wrap::-webkit-scrollbar-track:vertical {
	background: -webkit-linear-gradient(180deg, #fff, #fff, #fff, #fff, #ededed, #ededed, #ededed, #fff, #fff, #fff);
	border-radius: 3px;
}

/* hover효과 */
.lesson:hover {
	background: #fff9c6;
	transition: 0.3s;
}
.lesson:hover .lesson-head {
	background: #00a38a;
	color: #fff;
	transition: 0.3s;
}

/* lesson-foot 아이콘 hover effect */
.book_img:hover {
	content: url(../../img/2/math/icon_book_on.png);
}
.pc_img:hover {
	content: url(../../img/2/math/icon_pc_on.png);
}

/* active effect */
.menu-item-title.menu-item:hover {
	padding-left: 80px;
	white-space: nowrap;
}
.menu-item-title.menu-item.active {
	padding-left: 80px;
	white-space: nowrap;
}
.menu-item-title.menu-item:hover::before {
	background: #004b50;
	left: 55px;
}
.menu-item-title.menu-item.active::before {
	background: #004b50;
	left: 55px;
}

/* 마우스오버시 선 effect */
.menu-item:hover {
	width: 482px;
	height: 70px;
	background: #fff;
	border-radius: 35px;

	/* 위치조정 */
	position: relative;
	right: 50px;
}
.menu-item:hover {
	padding-left: 55px;
	color: #004b50;
}

.menu-item-list div:nth-child(1).menu-item:hover:after {
	content: ' ';
	display: inline-block;
	background: url(../../img/2/math/num0_1.png) no-repeat;
	width: 93px;
	height: 135px;
	/* position: relative;
    left: 83px;
    top: 129px; */
	height: 287px;
	position: absolute;
	top: 22px;
	left: 470px;
}
.menu-item-list div:nth-child(1).menu-item.active:after {
	content: ' ';
	display: inline-block;
	background: url(../../img/2/math/num0_1.png) no-repeat;
	width: 93px;
	height: 135px;
	/* position: relative;
    left: 164px;
    left: 83px;
    top: 129px; */
	height: 287px;
	position: absolute;
	top: 22px;
	left: 470px;
}

.menu-item-list div:nth-child(2).menu-item:hover:after {
	background: url(../../img/2/math/num1_1.png) no-repeat;
	/* left: 85px;
    top: 92px; */
	height: 211px;
	top: 23px;
}
.menu-item-list div:nth-child(2).menu-item.active:after {
	background: url(../../img/2/math/num1_1.png) no-repeat;
	/* left: 85px;
    top: 92px; */
	height: 211px;
	top: 23px;
}

.menu-item-list div.menu-item:hover::after {
	content: ' ';
	display: inline-block;
	background: url(../../img/2/math/num2_1.png) no-repeat;
	width: 93px;
	height: 135px;
	/* position: relative;
    left: 185px;
    top: 55px; */
	position: absolute;
	top: 25px;
	left: 470px;
}
.menu-item-list div.menu-item.active::after {
	content: ' ';
	display: inline-block;
	background: url(../../img/2/math/num2_1.png) no-repeat;
	width: 93px;
	height: 135px;
	/* position: relative;
    left: 185px;
    top: 55px; */
	position: absolute;
	top: 25px;
	left: 470px;
	text-wrap: wrap;
}

.menu-item-list div:nth-child(3).menu-item:hover:after {
	/* left: 185px; */
	top: 24px;
}
.menu-item-list div:nth-child(3).menu-item.active:after {
	top: 24px;
}
.menu-item-list div:nth-child(4).menu-item:hover:after {
	background: url(../../img/2/math/num3_1.png) no-repeat;
	/* left: 210px;
    top: 56px; */
}
.menu-item-list div:nth-child(4).menu-item.active:after {
	background: url(../../img/2/math/num3_1.png) no-repeat;
	/* left: 210px;
    top: 56px; */
}

.menu-item-list div:nth-child(5).menu-item:hover:after {
	background: url(../../img/2/math/num4_1.png) no-repeat;
	/* left: 187px;
    top: 6px; */
	top: -25px;
}
.menu-item-list div:nth-child(5).menu-item.active:after {
	background: url(../../img/2/math/num4_1.png) no-repeat;
	/* left: 187px;
    top: 6px; */
	top: -25px;
}

.menu-item-list div:nth-child(6).menu-item:hover:after {
	background: url(../../img/2/math/num5_1.png) no-repeat;
	/* left: 83px;
    top: -61px; */
	height: 150px;
	width: 93px;
	top: -100px;
}
.menu-item-list div:nth-child(6).menu-item.active:after {
	background: url(../../img/2/math/num5_1.png) no-repeat;
	/* left: 83px;
    top: -61px; */
	height: 150px;
	width: 93px;
	top: -100px;
}

.menu-item-list div:nth-child(7).menu-item:hover:after {
	background: url(../../img/2/math/num6_1.png) no-repeat;
	/* left: 54px;
    top: -98px; */
	height: 226px;
	top: -175px;
}
.menu-item-list div:nth-child(7).menu-item.active:after {
	background: url(../../img/2/math/num6_1.png) no-repeat;
	/* left: 54px;
    top: -98px; */
	height: 226px;
	top: -175px;
}

.menu-item-title:last-child.menu-item:hover::after {
	background: url(../../img/2/math/num7_1.png) no-repeat;
	/* left: 176px;
    top: -135px; */
	height: 302px;
	top: -250px;
}
.menu-item-title:last-child.menu-item.active::after {
	background: url(../../img/2/math/num7_1.png) no-repeat;
	/* left: 176px;
    top: -135px; */
	height: 302px;
	top: -250px;
}

/* 타이틀 num이미지 바뀜 _마우스오버 */
.menu-item-list div:nth-child(2).menu-item:hover img {
	content: url(../../img/2/math/num1_on.png);
}
.menu-item-list div:nth-child(3).menu-item:hover img {
	content: url(../../img/2/math/num2_on.png);
}
.menu-item-list div:nth-child(4).menu-item:hover img {
	content: url(../../img/2/math/num3_on.png);
}
.menu-item-list div:nth-child(5).menu-item:hover img {
	content: url(../../img/2/math/num4_on.png);
}
.menu-item-list div:nth-child(6).menu-item:hover img {
	content: url(../../img/2/math/num5_on.png);
}
.menu-item-list div:nth-child(7).menu-item:hover img {
	content: url(../../img/2/math/num6_on.png);
}

.overflowy-hidden {
	overflow-y: hidden;
}