/* 연혁 타임라인 스타일 */
.history_timeline {
	position: relative;
	max-width: 1200px;
	margin: 4rem auto 0;
	padding: 0 2rem;
}

.history_timeline::before {
	content: '';
	position: absolute;
	left: 50%;
	top: 0;
	bottom: 0;
	width: 3px;
	background: linear-gradient(to bottom, #e0e0e0, #f5f5f5);
	transform: translateX(-50%);
}

.history_item {
	position: relative;
	margin-bottom: 4rem;
	display: flex;
	align-items: flex-start;
}

.history_item:nth-child(odd) {
	flex-direction: row;
}

.history_item:nth-child(even) {
	flex-direction: row-reverse;
}

.history_year {
	position: absolute;
	left: 50%;
	transform: translateX(-50%);
	width: 80px;
	height: 80px;
	background: #fff;
	border: 3px solid #2c5f2d;
	border-radius: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 1.8rem;
	font-weight: 700;
	color: #2c5f2d;
	z-index: 2;
	box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.history_content {
	flex: 1;
	max-width: 45%;
	background: #fff;
	border-radius: 12px;
	padding: 2rem;
	box-shadow: 0 4px 12px rgba(0,0,0,0.08);
	transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.history_item:nth-child(odd) .history_content {
	margin-right: auto;
	margin-left: 0;
}

.history_item:nth-child(even) .history_content {
	margin-left: auto;
	margin-right: 0;
}

.history_content:hover {
	transform: translateY(-4px);
	box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}

.history_content ul {
	list-style: none;
	padding: 0;
	margin: 0;
}

.history_content li {
	position: relative;
	padding-left: 1.5rem;
	margin-bottom: 0.8rem;
	line-height: 1.6;
	color: #333;
}

.history_content li:last-child {
	margin-bottom: 0;
}

.history_content li::before {
	content: '▸';
	position: absolute;
	left: 0;
	color: #2c5f2d;
	font-weight: bold;
}

/* 모바일 반응형 */
@media screen and (max-width: 768px) {
	.history_timeline {
		padding: 0 1rem;
	}
	
	.history_timeline::before {
		left: 30px;
	}
	
	.history_item {
		flex-direction: row !important;
		padding-left: 60px;
	}
	
	.history_year {
		left: 30px;
		transform: translateX(-50%);
		width: 60px;
		height: 60px;
		font-size: 1.4rem;
	}
	
	.history_content {
		max-width: 100%;
		margin: 0 !important;
		padding: 1.5rem;
	}
}