/* ============================================================
   gallery.css — gallery.html 専用スタイル
   依存: style.css（共通）を先に読み込むこと
   ============================================================ */

/* =============================================
   ヘッダー上書き（シャッターなし・現在ページ強調）
   ============================================= */

.nav-current {
	color: var(--yellow) !important;
}

.nav-current::after {
	width: 100% !important;
}

/* =============================================
   PAGE HERO
   ============================================= */

.gallery-hero {
	position: relative;
	height: 56vh;
	min-height: 380px;
	display: flex;
	align-items: flex-end;
	padding: 64px 60px;
	overflow: hidden;
	margin-top: 70px; /* header height */
}

.gallery-hero-bg {
	position: absolute;
	inset: 0;
	background:
		linear-gradient(to bottom, rgba(0, 0, 0, 0.15) 0%, rgba(0, 0, 0, 0.82) 100%),
		url("../img/top-2.JPG") center / cover no-repeat;
	transform: scale(1.04);
	animation: heroBgZoom 20s ease infinite alternate;
}

@keyframes heroBgZoom {
	from {
		transform: scale(1.04);
	}
	to {
		transform: scale(1.1);
	}
}

.gallery-hero-noise {
	position: absolute;
	inset: 0;
	opacity: 0.3;
	background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.05'/%3E%3C/svg%3E");
}

.gallery-hero-frame {
	position: absolute;
	inset: 20px;
	border: 1px solid rgba(245, 197, 24, 0.15);
	pointer-events: none;
}

.gallery-hero-frame::before,
.gallery-hero-frame::after {
	content: "";
	position: absolute;
	width: 30px;
	height: 30px;
	border-color: var(--yellow);
	border-style: solid;
}

.gallery-hero-frame::before {
	top: -1px;
	left: -1px;
	border-width: 2px 0 0 2px;
}
.gallery-hero-frame::after {
	bottom: -1px;
	right: -1px;
	border-width: 0 2px 2px 0;
}

.gallery-hero-content {
	position: relative;
	z-index: 2;
}

.gallery-hero-label {
	font-family: var(--font-heading);
	font-size: 0.7rem;
	letter-spacing: 0.6em;
	color: var(--yellow);
	margin-bottom: 12px;
	opacity: 0;
	animation: fadeInUp 0.7s forwards 0.2s;
}

.gallery-hero-title {
	font-family: var(--font-display);
	font-size: clamp(5rem, 13vw, 9rem);
	letter-spacing: 0.08em;
	line-height: 0.9;
	color: var(--white);
	opacity: 0;
	animation: fadeInUp 0.7s forwards 0.4s;
}

.gallery-hero-count {
	font-family: var(--font-heading);
	font-size: 0.75rem;
	letter-spacing: 0.5em;
	color: rgba(245, 240, 232, 0.4);
	margin-top: 14px;
	opacity: 0;
	animation: fadeInUp 0.7s forwards 0.6s;
}

/* =============================================
   フィルターバー
   ============================================= */

.gallery-filter-bar {
	position: sticky;
	top: 70px;
	z-index: 100;
	background: rgba(10, 10, 10, 0.85);
	backdrop-filter: blur(16px);
	-webkit-backdrop-filter: blur(16px);
	border-bottom: 1px solid rgba(245, 197, 24, 0.1);
}

.gallery-filter-inner {
	max-width: 1400px;
	margin: 0 auto;
	padding: 0 60px;
	display: flex;
	align-items: center;
	gap: 4px;
	overflow-x: auto;
	scrollbar-width: none;
}

.gallery-filter-inner::-webkit-scrollbar {
	display: none;
}

.filter-btn {
	font-family: var(--font-heading);
	font-size: 0.72rem;
	letter-spacing: 0.35em;
	color: rgba(245, 240, 232, 0.4);
	background: none;
	border: none;
	padding: 18px 20px;
	cursor: pointer;
	position: relative;
	white-space: nowrap;
	transition: color 0.25s;
	flex-shrink: 0;
}

.filter-btn::after {
	content: "";
	position: absolute;
	bottom: 0;
	left: 20px;
	right: 20px;
	height: 2px;
	background: var(--yellow);
	transform: scaleX(0);
	transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.filter-btn:hover {
	color: var(--white);
}
.filter-btn.active {
	color: var(--yellow);
}
.filter-btn.active::after {
	transform: scaleX(1);
}

/* =============================================
   ギャラリー メイン
   ============================================= */

.gallery-main {
	max-width: 1400px;
	margin: 0 auto;
	padding: 60px 60px 100px;
}

/* =============================================
   マソンリーグリッド
   ============================================= */

.gallery-masonry {
	columns: 3;
	column-gap: 16px;
}

.g-item {
	break-inside: avoid;
	margin-bottom: 16px;
	cursor: pointer;
	position: relative;
	overflow: hidden;
	transition:
		opacity 0.4s ease,
		transform 0.4s ease;
}

/* サイズバリエーション */
.g-item[data-size="tall"] .g-item-inner {
	aspect-ratio: 3 / 4.5;
}
.g-item[data-size="wide"] .g-item-inner {
	aspect-ratio: 4 / 3;
}
.g-item[data-size="normal"].g-item-inner {
	aspect-ratio: 3 / 4;
}

.g-item-inner {
	position: relative;
	overflow: hidden;
	width: 100%;
}

/* 画像 */
.g-item img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
	filter: grayscale(25%) contrast(1.08);
	transition:
		transform 0.7s cubic-bezier(0.4, 0, 0.2, 1),
		filter 0.5s ease;
}

.g-item:hover img {
	transform: scale(1.06);
}

/* オーバーレイ */
.g-item-overlay {
	position: absolute;
	inset: 0;
	background: linear-gradient(to top, rgba(0, 0, 0, 0.88) 0%, rgba(0, 0, 0, 0.2) 50%, transparent 100%);
	opacity: 0;
	transition: opacity 0.4s ease;
	display: flex;
	flex-direction: column;
	justify-content: space-between;
	padding: 20px;
}

.g-item:hover .g-item-overlay {
	opacity: 1;
}

.g-item-info {
	margin-top: auto;
}

.g-item-cat {
	display: block;
	font-family: var(--font-heading);
	font-size: 0.6rem;
	letter-spacing: 0.45em;
	color: var(--yellow);
	margin-bottom: 6px;
}

.g-item-title {
	font-family: var(--font-display);
	font-size: 1.4rem;
	letter-spacing: 0.12em;
	color: var(--white);
	line-height: 1;
	margin-bottom: 4px;
}

.g-item-year {
	font-family: var(--font-heading);
	font-size: 0.65rem;
	letter-spacing: 0.3em;
	color: rgba(245, 240, 232, 0.45);
}

.g-item-expand {
	position: absolute;
	top: 16px;
	right: 16px;
	width: 38px;
	height: 38px;
	border: 1px solid rgba(245, 197, 24, 0.5);
	display: flex;
	align-items: center;
	justify-content: center;
	color: var(--yellow);
	font-size: 0.85rem;
	transform: scale(0) rotate(-45deg);
	transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.g-item:hover .g-item-expand {
	transform: scale(1) rotate(0deg);
}

/* フィルター時 非表示アイテム */
.g-item.hidden {
	display: none;
}

/* 入場アニメーション */
.g-item.entering {
	animation: itemEnter 0.45s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes itemEnter {
	from {
		opacity: 0;
		transform: translateY(20px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

/* =============================================
   ギャラリー ステータス
   ============================================= */

.gallery-status {
	text-align: center;
	margin-top: 60px;
	font-family: var(--font-heading);
	font-size: 0.72rem;
	letter-spacing: 0.5em;
	color: rgba(245, 240, 232, 0.25);
}

/* =============================================
   LIGHTBOX
   ============================================= */

.lb-overlay {
	position: fixed;
	inset: 0;
	z-index: 9000;
	background: rgba(0, 0, 0, 0.97);
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	opacity: 0;
	pointer-events: none;
	transition: opacity 0.35s ease;
}

.lb-overlay.open {
	opacity: 1;
	pointer-events: all;
}

/* 閉じるボタン */
.lb-close {
	position: absolute;
	top: 28px;
	right: 32px;
	width: 44px;
	height: 44px;
	border: 1px solid rgba(245, 197, 24, 0.3);
	color: var(--yellow);
	font-size: 1rem;
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
	background: none;
	transition:
		background 0.2s,
		border-color 0.2s;
	z-index: 10;
}

.lb-close:hover {
	background: var(--yellow);
	border-color: var(--yellow);
	color: var(--black);
}

/* 前後ボタン */
.lb-prev,
.lb-next {
	position: absolute;
	top: 50%;
	transform: translateY(-50%);
	width: 50px;
	height: 50px;
	border: 1px solid rgba(245, 197, 24, 0.25);
	color: var(--white);
	font-size: 1rem;
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
	background: rgba(10, 10, 10, 0.6);
	transition:
		background 0.2s,
		border-color 0.2s,
		color 0.2s;
	z-index: 10;
}

.lb-prev {
	left: 32px;
}
.lb-next {
	right: 32px;
}

.lb-prev:hover,
.lb-next:hover {
	background: var(--yellow);
	border-color: var(--yellow);
	color: var(--black);
}

/* 画像エリア */
.lb-stage {
	position: relative;
	display: flex;
	align-items: center;
	justify-content: center;
	max-width: 88vw;
	max-height: 78vh;
}

.lb-img {
	max-width: 88vw;
	max-height: 78vh;
	object-fit: contain;
	border: 1px solid rgba(245, 197, 24, 0.1);
	opacity: 0;
	transition: opacity 0.3s ease;
}

.lb-img.loaded {
	opacity: 1;
}

/* ローダー */
.lb-loader {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
}

.lb-spinner {
	width: 32px;
	height: 32px;
	border: 2px solid rgba(245, 197, 24, 0.15);
	border-top-color: var(--yellow);
	border-radius: 50%;
	animation: spin 0.8s linear infinite;
}

@keyframes spin {
	to {
		transform: rotate(360deg);
	}
}

/* メタ情報 */
.lb-meta {
	position: absolute;
	bottom: 32px;
	left: 50%;
	transform: translateX(-50%);
	display: flex;
	align-items: center;
	gap: 20px;
	white-space: nowrap;
}

.lb-cat {
	font-family: var(--font-heading);
	font-size: 0.62rem;
	letter-spacing: 0.45em;
	color: var(--yellow);
}

.lb-title {
	font-family: var(--font-display);
	font-size: 1.2rem;
	letter-spacing: 0.2em;
	color: var(--white);
}

.lb-year {
	font-family: var(--font-heading);
	font-size: 0.62rem;
	letter-spacing: 0.3em;
	color: rgba(245, 240, 232, 0.4);
}

.lb-index {
	font-family: var(--font-heading);
	font-size: 0.62rem;
	letter-spacing: 0.2em;
	color: rgba(245, 240, 232, 0.25);
	margin-left: 8px;
}

/* =============================================
   レスポンシブ
   ============================================= */

@media (max-width: 1100px) {
	.gallery-masonry {
		columns: 3;
	}
}

@media (max-width: 900px) {
	.gallery-hero {
		padding: 48px 24px;
	}
	.gallery-filter-inner {
		padding: 0 24px;
	}
	.gallery-main {
		padding: 40px 24px 80px;
	}
	.gallery-masonry {
		columns: 2;
		column-gap: 12px;
	}
	.g-item {
		margin-bottom: 12px;
	}
	.lb-prev {
		left: 12px;
	}
	.lb-next {
		right: 12px;
	}
	.lb-meta {
		gap: 12px;
		flex-wrap: wrap;
		justify-content: center;
		bottom: 20px;
	}
}

@media (max-width: 540px) {
	.gallery-masonry {
		columns: 2;
		column-gap: 8px;
	}
	.g-item {
		margin-bottom: 8px;
	}
	.gallery-hero-title {
		font-size: clamp(4rem, 18vw, 6rem);
	}
	.lb-stage {
		max-width: 96vw;
	}
	.lb-img {
		max-width: 96vw;
	}
}