@charset "utf-8";

/* ============================================================
   march06 — 플립 카드형
   표지 앞면 호버 시 3D flip → 뒷면에 목차 + 이번 호 링크
   ============================================================ */

/* ============================================================
   페이지 헤더
   ============================================================ */
.mf-header {
	padding: 140px 60px 80px;
	background: var(--color-bg-main);
}

.mf-header-inner {
	max-width: 1200px;
	margin: 0 auto;
}

.mf-label {
	font-size: clamp(14px, calc(4px + 1.4vw), 18px);
	font-weight: 700;
	color: var(--color-text-muted);
	margin-bottom: 16px;
}

.mf-tit {
	font-size: clamp(36px, calc(18px + 3vw), 64px);
	font-weight: 900;
	color: var(--color-text-main);
	font-family: var(--font-sub-title);
	margin-bottom: 16px;
}

.mf-desc {
	font-size: clamp(16px, calc(4px + 1.5vw), 20px);
	color: var(--color-text-sub);
}

/* ============================================================
   연도 필터 바
   ============================================================ */
.mf-filter-bar {
	position: sticky;
	top: 90px;
	z-index: 2;
	background: var(--color-bg-main);
	border-bottom: 1px solid var(--color-border);
	transition: top 0.25s ease;
}

.mf-filter-inner {
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 60px;
	display: flex;
	gap: 0;
}

.mf-filter-btn {
	padding: 18px 28px;
	font-size: clamp(15px, calc(3px + 1.5vw), 18px);
	font-weight: 600;
	color: var(--color-text-muted);
	background: none;
	border: none;
	border-bottom: 2px solid transparent;
	cursor: pointer;
	transition:
		color 0.2s,
		border-color 0.2s;
}

.mf-filter-btn:hover {
	color: var(--color-text-main);
}

.mf-filter-btn.is-active {
	color: var(--color-text-main);
	border-bottom-color: var(--color-text-main);
}

/* ============================================================
   카드 그리드
   ============================================================ */
.mf-grid-section {
	padding: 80px 0 120px;
	background: var(--color-bg-main);
}

.mf-grid {
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 60px;
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 40px 32px;
}

/* ============================================================
   플립 카드
   ============================================================ */
.mf-card {
	perspective: 1000px;
	aspect-ratio: 3 / 4;
}

.mf-card.is-hidden {
	display: none;
}

.mf-card-inner {
	position: relative;
	width: 100%;
	height: 100%;
	transform-style: preserve-3d;
	transition: transform 0.4s cubic-bezier(0.4, 0.2, 0.2, 1);
	cursor: pointer;
}

/* 호버 시 살짝 기울기 — 뒤집기 가능함을 암시 */
.mf-card:not(.is-flipped) .mf-card-inner:hover {
	transform: rotateY(18deg);
}

.mf-card.is-flipped .mf-card-inner {
	transform: rotateY(180deg);
}

/* 앞면 */
.mf-card-front,
.mf-card-back {
	position: absolute;
	inset: 0;
	border-radius: 12px;
	overflow: hidden;
	backface-visibility: hidden;
	-webkit-backface-visibility: hidden;
}

.mf-card-front {
	background: var(--color-bg-sub);
}

.mf-card-front img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
	transition: transform 0.5s ease;
}

.mf-card:not(.is-flipped) .mf-card-inner:hover .mf-card-front img {
	transform: scale(1.04);
}

/* 앞면 하단 그라디언트 + 정보 */
.mf-card-front::after {
	content: "";
	position: absolute;
	inset: 0;
	background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.05) 50%, transparent 100%);
	pointer-events: none;
}

.mf-card-front-info {
	position: absolute;
	bottom: 20px;
	left: 20px;
	z-index: 1;
	display: flex;
	flex-direction: column;
	gap: 4px;
}

.mf-card-vol {
	font-size: clamp(15px, calc(3px + 1.5vw), 19px);
	font-weight: 800;
	color: #fff;
	font-family: var(--font-sub-title);
}

.mf-card-date {
	font-size: clamp(13px, calc(3px + 1.2vw), 15px);
	color: rgba(255, 255, 255, 0.6);
}

/* 클릭 힌트 ���지 — 항상 표시, 호버 시 선명 */
.mf-card-front::before {
	content: "↺ 클릭";
	position: absolute;
	top: 14px;
	right: 14px;
	z-index: 2;
	font-size: clamp(12px, calc(2px + 1.1vw), 14px);
	font-weight: 700;
	color: #fff;
	background: rgba(0, 0, 0, 0.32);
	backdrop-filter: blur(4px);
	-webkit-backdrop-filter: blur(4px);
	padding: 5px 10px;
	border-radius: 20px;
	opacity: 0.55;
	transition: opacity 0.25s;
	pointer-events: none;
}

.mf-card:not(.is-flipped) .mf-card-inner:hover .mf-card-front::before {
	opacity: 1;
}

/* 뒤집힌 상태에서는 힌트 숨김 */
.mf-card.is-flipped .mf-card-front::before {
	opacity: 0;
}

/* 뒷면 */
.mf-card-back {
	transform: rotateY(180deg);
	background: var(--color-bg-card);
	display: flex;
	flex-direction: column;
	padding: 28px 24px 24px;
	gap: 8px;
}

.mf-back-vol {
	font-size: clamp(13px, calc(3px + 1.2vw), 15px);
	font-weight: 700;
	color: var(--color-primary);
}

.mf-back-theme {
	font-size: clamp(20px, calc(8px + 1.8vw), 28px);
	font-weight: 900;
	color: var(--color-text-main);
	font-family: var(--font-sub-title);
	margin-bottom: 4px;
	overflow: hidden;
	white-space: nowrap;
	text-overflow: ellipsis;
}

.mf-back-date {
	font-size: clamp(13px, calc(3px + 1.2vw), 15px);
	color: var(--color-text-muted);
	padding-bottom: 16px;
	border-bottom: 1px solid var(--color-border);
	margin-bottom: 4px;
}

.mf-back-articles {
	flex: 1;
	display: flex;
	flex-direction: column;
	gap: 0;
	overflow: hidden;
}

.mf-back-articles li {
	font-size: clamp(14px, calc(3px + 1.3vw), 17px);
	color: var(--color-text-sub);
	padding: 10px 0;
	border-bottom: 1px solid var(--color-border);
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
}

.mf-back-articles li:first-child {
	border-top: none;
}

.mf-back-cta {
	display: inline-flex;
	align-self: flex-start;
	margin-top: 12px;
	font-size: clamp(14px, calc(3px + 1.3vw), 17px);
	font-weight: 700;
	color: var(--color-text-main);
	border-bottom: 2px solid var(--color-text-main);
	padding-bottom: 3px;
	transition: opacity 0.2s;
}

.mf-back-cta:hover {
	opacity: 0.55;
}

/* ============================================================
   반응형 — 999px
   ============================================================ */
@media all and (max-width: 999px) {
	.mf-header {
		padding: 120px 32px 60px;
	}

	.mf-filter-bar {
		top: 70px;
	}

	.mf-filter-inner {
		padding: 0 32px;
	}

	.mf-grid {
		padding: 0 32px;
		grid-template-columns: repeat(2, 1fr);
		gap: 32px 24px;
	}
}

/* ============================================================
   반응형 — 768px
   ============================================================ */
@media all and (max-width: 768px) {
	.mf-header {
		padding: 100px 20px 48px;
	}

	.mf-filter-inner {
		padding: 0 20px;
	}

	.mf-filter-btn {
		padding: 16px 20px;
	}

	.mf-grid-section {
		padding: 60px 0 80px;
	}

	.mf-grid {
		padding: 0 20px;
		grid-template-columns: repeat(2, 1fr);
		gap: 24px 16px;
	}
	.mf-card-back {
		padding: 16px;
		gap: 4px;
	}
	.mf-back-date {
		padding-bottom: 0;
	}
	.mf-back-articles li {
		padding: 4px 0;
	}
}

/* ============================================================
   반응형 — 499px
   ============================================================ */
@media all and (max-width: 499px) {
	.mf-grid {
		grid-template-columns: 1fr;
		gap: 24px;
	}
}