/* 콘텐츠 영역 */
.content {
	flex: 1;
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	min-height: calc( 100vh - 80px);
	padding: 40px;
	background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
	position: relative;
	overflow: hidden;
}

/* 배경 패턴 */
.content::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background-image: 
		radial-gradient(circle at 20% 50%, rgba(255, 149, 0, 0.1) 0%, transparent 50%),
		radial-gradient(circle at 80% 80%, rgba(102, 126, 234, 0.08) 0%, transparent 50%),
		radial-gradient(circle at 40% 20%, rgba(0, 191, 165, 0.06) 0%, transparent 50%);
	pointer-events: none;
}

/* 움직이는 도형들 */
.floating-shapes {
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	pointer-events: none;
	overflow: hidden;
}

.shape {
	position: absolute;
	border-radius: 50%;
	opacity: 0.6;
	filter: blur(40px);
	animation: float 20s infinite ease-in-out;
}

.shape-1 {
	width: 300px;
	height: 300px;
	background: linear-gradient(135deg, #ff9500 0%, #ff7a00 100%);
	top: -150px;
	left: -150px;
	animation-duration: 25s;
}

.shape-2 {
	width: 200px;
	height: 200px;
	background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	bottom: -100px;
	right: -100px;
	animation-duration: 30s;
	animation-delay: -5s;
}

.shape-3 {
	width: 250px;
	height: 250px;
	background: linear-gradient(135deg, #00bfa5 0%, #00a693 100%);
	top: 50%;
	right: 10%;
	animation-duration: 35s;
	animation-delay: -10s;
}

@keyframes float {
	0%, 100% {
		transform: translate(0, 0) scale(1);
	}
	25% {
		transform: translate(30px, -30px) scale(1.1);
	}
	50% {
		transform: translate(-20px, 20px) scale(0.9);
	}
	75% {
		transform: translate(40px, 10px) scale(1.05);
	}
}

/* 점선 패턴 */
.dot-pattern {
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background-image: radial-gradient(circle, rgba(0, 0, 0, 0.03) 1px, transparent 1px);
	background-size: 30px 30px;
	pointer-events: none;
	opacity: 0.5;
}

/* 타이틀 */
.main-title {
	text-align: center;
	margin-bottom: 60px;
	position: relative;
	z-index: 1;
}

.main-title h1 {
	font-size: 42px;
	font-weight: 800;
	color: #1a1a1a;
	margin-bottom: 12px;
	letter-spacing: -1px;
}

.main-title h1 span {
	color: #ff9500;
}

.main-title p {
	font-size: 18px;
	color: #666;
}

/* 교재 카드 그리드 */
.series-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 32px;
	max-width: 1200px;
	width: 100%;
	position: relative;
	z-index: 1;
}

.series-card {
	background: white;
	border-radius: 24px;
	padding: 48px 40px;
	text-align: center;
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
	cursor: pointer;
	position: relative;
	overflow: hidden;
	box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
	border: 2px solid transparent;
	text-decoration: none;
	color: inherit;
	display: flex;
	flex-direction: column;
	justify-content: center;
	min-height: 380px;
}

.series-card::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background: linear-gradient(135deg, var(--card-color-1) 0%, var(--card-color-2) 100%);
	opacity: 0;
	transition: opacity 0.3s ease;
	z-index: -1;
}

.series-card:nth-child(1) {
	--card-color-1: #ff9500;
	--card-color-2: #ff7a00;
}

.series-card:nth-child(2) {
	--card-color-1: #667eea;
	--card-color-2: #764ba2;
}

.series-card:nth-child(3) {
	--card-color-1: #00bfa5;
	--card-color-2: #00a693;
}

.series-card:hover {
	transform: translateY(-8px);
	box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
	border-color: var(--card-color-1);
}

.series-card:hover::before {
	opacity: 0.05;
}

.series-card:hover .series-icon {
	transform: scale(1.1);
	background: var(--card-color-1);
	color: white;
}

.series-card:hover .series-arrow {
	transform: translateX(4px);
}

.series-icon {
	width: 80px;
	height: 80px;
	background: #f8fafb;
	border-radius: 20px;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 40px;
	margin: 0 auto 28px;
	transition: all 0.3s ease;
}

.series-title {
	font-size: 26px;
	font-weight: 700;
	color: #1a1a1a;
	margin-bottom: 16px;
}

.series-desc {
	font-size: 15px;
	color: #666;
	line-height: 1.6;
	margin-bottom: 24px;
}

.series-link {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	color: var(--card-color-1);
	font-size: 15px;
	font-weight: 600;
	text-decoration: none;
	transition: all 0.2s ease;
}

.series-arrow {
	transition: transform 0.2s ease;
}

/* 반응형 */
@media (max-width: 1024px) {
	.series-grid {
		gap: 24px;
	}

	.series-card {
		padding: 40px 32px;
		min-height: 340px;
	}

	.series-title {
		font-size: 22px;
	}

	.main-title h1 {
		font-size: 36px;
	}
}

@media (max-width: 768px) {
	.content {
		padding: 40px 20px;
	}

	.series-grid {
		grid-template-columns: 1fr;
		gap: 20px;
		max-width: 400px;
	}

	.series-card {
		min-height: auto;
		padding: 32px 28px;
	}

	.main-title {
		margin-bottom: 40px;
	}

	.main-title h1 {
		font-size: 28px;
		line-height: 140%;
	}

	.main-title p {
		font-size: 16px;
	}

	.series-icon {
		width: 64px;
		height: 64px;
		font-size: 32px;
		margin-bottom: 20px;
	}

	.series-title {
		font-size: 20px;
	}
}

@media (max-width: 480px) {

}