/* リセットCSS */
* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

/* カラーパレット */
:root {
	--warm-white: #FDFDFC;
	--washi-beige: #F7F5F2;
	--dark-brown: #4A413C;
	--sumi-black: #1A1A1A;
	--ember-orange: #D96704;
	--soft-ember: #E89A5C;
	--celadon: #6A8E7F;
	--border-light: #EAE5DA;
	--text-gray: #666666;
	--light-gray: #999999;
	/* 熾火の表現用の色を追加 */
	--ember-glow: #D35400; 
}

/* 基本設定 */
body {
/*	font-family: 'Noto Sans JP', sans-serif; */
	font-family: "游明朝", "Yu Mincho", "Hiragino Mincho ProN", serif;
	background-color: var(--warm-white);
	color: var(--dark-brown);
	line-height: 1.9;
}
a {
	text-decoration: none;
}
/* 和紙テクスチャ（控えめ） */
.subtle-texture {
	position: relative;
}

.subtle-texture::after {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background-image: 
		repeating-linear-gradient(
			90deg,
			transparent,
			transparent 100px,
			rgba(0, 0, 0, 0.01) 100px,
			rgba(0, 0, 0, 0.01) 101px
		);
	pointer-events: none;
	opacity: 0.5;
}

/* タイトル用熾火パーティクル */
.site-title-wrapper {
	position: relative;
	display: inline-block;
}

.title-ember-particles {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	pointer-events: none;
	z-index: 5;
	overflow: visible;
}

.title-ember-particle {
	position: absolute;
	width: 4px;
	height: 4px;
	background: var(--ember-glow);
	border-radius: 50%;
	box-shadow: 0 0 6px var(--ember-orange);
	opacity: 0;
}

.title-ember-particle:nth-child(1) { 
	left: 10%; 
	bottom: -5px;
	animation: title-ember-float1 10s infinite linear;
}
.title-ember-particle:nth-child(2) { 
	left: 30%; 
	bottom: -8px;
	animation: title-ember-float2 12s infinite linear;
	animation-delay: -3s;
}
.title-ember-particle:nth-child(3) { 
	left: 50%; 
	bottom: -3px;
	animation: title-ember-float3 11s infinite linear;
	animation-delay: -6s;
}
.title-ember-particle:nth-child(4) { 
	left: 70%; 
	bottom: -6px;
	animation: title-ember-float4 13s infinite linear;
	animation-delay: -2s;
}
.title-ember-particle:nth-child(5) { 
	left: 90%; 
	bottom: -4px;
	animation: title-ember-float5 9s infinite linear;
	animation-delay: -5s;
}

@keyframes title-ember-float1 {
	0% { transform: translateY(0) translateX(0); opacity: 0; }
	15% { opacity: 0.6; }
	50% { transform: translateY(-80px) translateX(15px); opacity: 0.4; }
	100% { transform: translateY(-120px) translateX(-10px); opacity: 0; }
}

@keyframes title-ember-float2 {
	0% { transform: translateY(0) translateX(0); opacity: 0; }
	15% { opacity: 0.5; }
	50% { transform: translateY(-70px) translateX(-12px); opacity: 0.3; }
	100% { transform: translateY(-110px) translateX(20px); opacity: 0; }
}

@keyframes title-ember-float3 {
	0% { transform: translateY(0) translateX(0); opacity: 0; }
	15% { opacity: 0.7; }
	50% { transform: translateY(-75px) translateX(8px); opacity: 0.5; }
	100% { transform: translateY(-115px) translateX(-15px); opacity: 0; }
}

@keyframes title-ember-float4 {
	0% { transform: translateY(0) translateX(0); opacity: 0; }
	15% { opacity: 0.4; }
	50% { transform: translateY(-85px) translateX(-20px); opacity: 0.2; }
	100% { transform: translateY(-125px) translateX(12px); opacity: 0; }
}

@keyframes title-ember-float5 {
	0% { transform: translateY(0) translateX(0); opacity: 0; }
	15% { opacity: 0.6; }
	50% { transform: translateY(-65px) translateX(25px); opacity: 0.4; }
	100% { transform: translateY(-105px) translateX(-8px); opacity: 0; }
}


/* ヘッダー */
.header {
	background: linear-gradient(to bottom, var(--warm-white), rgba(253, 253, 252, 0.95));
	padding: 2rem 0;
	position: sticky;
	top: 0;
	z-index: 50;
	box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
	transition: all 0.3s ease;
}

.header-content {
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 2rem;
	display: flex;
	justify-content: space-between;
	align-items: center;
}

.site-title {
	/* フォントを「はんなり明朝」に変更 */
	font-family: 'Hannari Mincho', serif;
	font-size: 2.5rem; /* 少し大きくして可読性を調整 */
	font-weight: normal; /* フォントの持ち味を活かす */
	color: var(--sumi-black);
	text-decoration: none;
	letter-spacing: 0.08em; /* 文字間を少し広げる */
	position: relative;
	transition: color 0.3s ease;
}

.site-title:hover {
	color: var(--ember-orange);
}

.site-title:hover::after {
	opacity: 0.7;
}

.site-subtitle {
	font-size: 0.75rem;
	color: var(--light-gray);
	letter-spacing: 0.15em;
	margin-top: 0.25rem;
}

/* ナビゲーション */
.nav {
	display: flex;
	gap: 2rem;
}

.nav-link {
	color: var(--text-gray);
	text-decoration: none;
	font-size: 0.9rem;
	font-weight: 500;
	position: relative;
	padding-bottom: 4px;
	transition: color 0.3s ease;
}

.nav-link::after {
	content: '';
	position: absolute;
	bottom: 0;
	left: 0;
	width: 0;
	height: 2px;
	/* 熾火の色を適用 */
	background-color: var(--ember-glow);
	transition: width 0.3s ease;
}

.nav-link:hover {
	color: var(--dark-brown);
}

.nav-link:hover::after {
	width: 100%;
}

/* フッター */
.footer {
	background: var(--washi-beige);
	padding: 4rem 0 2rem;
	margin-top: 6rem;
	text-align: center;
	position: relative;
}

.footer::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 1px;
	/* 熾火の表現: フッターの区切り線をグローに */
	background: linear-gradient(to right, transparent, var(--ember-glow), transparent);
	opacity: 0.6;
}

.footer-title {
	/* フォントを「はんなり明朝」に変更 */
	font-family: 'Hannari Mincho', serif;
	font-size: 2rem; /* サイズ調整 */
	font-weight: normal; /* フォントの持ち味を活かす */
	color: var(--dark-brown);
	margin-bottom: 0.5rem;
	letter-spacing: 0.08em;
}

.footer-subtitle {
	font-size: 0.9rem;
	color: var(--text-gray);
}

.footer-fireband {
	margin-top: 2rem;
	font-size: 0.75rem;
	color: var(--light-gray);
	letter-spacing: 0.2em;
	opacity: 0.7;
}

.footer-copyright {
	font-size: 0.875rem;
	color: var(--light-gray);
}

/* アニメーション */
.fade-in {
	opacity: 0;
	transform: translateY(20px);
	transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
	opacity: 1;
	transform: translateY(0);
}

/* レスポンシブ */
@media (max-width: 1024px) {
	.header {
		padding: 0.3rem;
	}
	.main-container {
		grid-template-columns: 1fr;
	}

	.site-title {
		font-size: 1.4rem;
	}
	.site-subtitle {
		margin-top: 0;
		font-size: 0.6rem;
	}

	.nav a {
		font-size: 0.7rem;
	}
	
	.sidebar {
		position: static;
	}
}

@media (max-width: 768px) {
	.header {
		padding: 0.5rem 0 0 0;
	}
	.header-content {
		padding: 0.4rem 0;
		flex-direction: column;
		text-align: center;
		gap: 1rem;
	}

	.site-title {
		font-size: 1.4rem;
	}
	.site-title::after {
		display: none;
	}

	.site-subtitle {
		margin-top: 0;
		font-size: 0.6rem;
	}	
	.footer-title {
		font-size: 1.8rem;
	}

	.nav {
		gap: 1rem;
		justify-content: center;
		flex-wrap: wrap;
	}

	.nav-link {
		font-size: 0.875rem;
	}

	.footer {
		margin-top: 3rem;
		padding: 2rem 0;
	}
	
	.footer-title {
		font-size: 1.4rem;
	}

	.footer-substitle {
		font-size: 0.6rem;
	}

	.footer-fireband {
		margin-top: 1rem;
		font-size: 0.7rem;
	}

	.footer-copyright {
		margin-top: 1rem;
		font-size: 0.65rem;
		color: var(--light-gray);
	}
}