/**
 * スライドショー（マーキー型） - フロントエンドスタイル
 * 企業ロゴが途切れなく横に流れ続ける無限ループスクロール
 * サイトカラーテーマ: ネイビー(#1E3A5F) × ベージュ(#F5EFE6)
 */

/* ==========================================
   コンテナ
   ========================================== */

.m-slideshow {
	position: relative;
	width: 100%;
	max-width: 1200px;
	margin: 2em auto;
	overflow: hidden;
	background: linear-gradient(135deg, #f8f5f0 0%, #f0ece4 100%);
	border-radius: 12px;
	box-shadow: 0 4px 20px rgba(30, 58, 95, 0.08);
}

/* 両端フェードマスク（自然に端がフェードアウト） */
.m-slideshow::before,
.m-slideshow::after {
	content: '';
	position: absolute;
	top: 0;
	bottom: 0;
	width: 60px;
	z-index: 5;
	pointer-events: none;
}

.m-slideshow::before {
	left: 0;
	background: linear-gradient(to right, #f0ece4 0%, transparent 100%);
}

.m-slideshow::after {
	right: 0;
	background: linear-gradient(to left, #f0ece4 0%, transparent 100%);
}

/* ==========================================
   トラック（横一列に並べて流す）
   ========================================== */

.m-slideshow__track {
	display: flex;
	align-items: center;
	width: max-content;
	gap: 12px;
	padding: 0;
	animation: marquee-scroll var(--marquee-duration, 30s) linear infinite;
	will-change: transform;
}

/* ホバーで一時停止 */
.m-slideshow:hover .m-slideshow__track {
	animation-play-state: paused;
}

/* アクセシビリティ: 動きを減らす設定 */
@media (prefers-reduced-motion: reduce) {
	.m-slideshow__track {
		animation-play-state: paused;
	}
}

/* ==========================================
   キーフレーム
   ========================================== */

@keyframes marquee-scroll {
	0% {
		transform: translateX(0);
	}
	100% {
		transform: translateX(-50%);
	}
}

/* ==========================================
   各アイテム（ロゴ画像）
   ========================================== */

.m-slideshow__item {
	flex: 0 0 auto;
	display: flex;
	align-items: center;
	justify-content: center;
	transition: opacity 0.3s ease;
}

.m-slideshow__item img {
	display: block;
	height: 160px;
	width: auto;
	max-width: 400px;
	object-fit: contain;
	filter: grayscale(20%);
	opacity: 0.85;
	transition: filter 0.4s ease, opacity 0.4s ease, transform 0.3s ease;
}

/* ホバー時にフルカラー＋少し拡大 */
.m-slideshow:hover .m-slideshow__item img {
	filter: grayscale(0%);
	opacity: 1;
}

.m-slideshow__item img:hover {
	transform: scale(1.08);
}

/* ==========================================
   ビューポート外で非表示時のフォールバック
   ========================================== */

.m-slideshow.is-out-of-view .m-slideshow__track {
	animation-play-state: paused;
}

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

@media screen and (max-width: 768px) {
	.m-slideshow {
		margin: 1em auto;
		border-radius: 8px;
	}

	.m-slideshow__track {
		gap: 10px;
		padding: 0;
	}

	.m-slideshow__item img {
		height: 120px;
		max-width: 300px;
	}

	.m-slideshow::before,
	.m-slideshow::after {
		width: 40px;
	}
}

@media screen and (max-width: 480px) {
	.m-slideshow__track {
		gap: 8px;
		padding: 0;
	}

	.m-slideshow__item img {
		height: 96px;
		max-width: 240px;
	}

	.m-slideshow::before,
	.m-slideshow::after {
		width: 24px;
	}
}