/*============================================================
CSS Variables & Theme System
============================================================*/
:root {
	/*▼ライトテーマ（デフォルト）▼*/
	--bg-primary: #fafafa;
	--bg-secondary: #ffffff;
	--bg-tertiary: #f0f0f0;
	--text-primary: #1a1a1a;
	--text-secondary: #555555;
	--text-muted: #888888;
	--border-color: rgba(0, 0, 0, 0.08);
	--card-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
	--card-shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.12);

	/*▼アクセントカラー▼*/
	--accent-primary: #667eea;
	--accent-secondary: #764ba2;
	--accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	--accent-gradient-soft: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);

	/*▼フォント▼*/
	--font-primary: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
	--font-heading: 'Oswald', 'Inter', sans-serif;

	/*▼トランジション▼*/
	--transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
	--transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
	--transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

	/*▼サイズ▼*/
	--container-max: 1200px;
	--section-padding: 120px;
	--border-radius: 16px;
	--border-radius-sm: 8px;
}

/*▼ダークテーマ▼*/
[data-theme="dark"] {
	--bg-primary: #0a0a0a;
	--bg-secondary: #141414;
	--bg-tertiary: #1a1a1a;
	--text-primary: #f5f5f5;
	--text-secondary: #b0b0b0;
	--text-muted: #666666;
	--border-color: rgba(255, 255, 255, 0.08);
	--card-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
	--card-shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.5);
	--accent-gradient-soft: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.15) 100%);
}

/*============================================================
Reset & Base Styles
============================================================*/
*,
*::before,
*::after {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

html {
	scroll-behavior: smooth;
}

body {
	font-family: var(--font-primary);
	font-size: 16px;
	line-height: 1.7;
	color: var(--text-primary);
	background-color: var(--bg-primary);
	transition: background-color var(--transition-slow), color var(--transition-slow);
	overflow-x: hidden;
}

a {
	color: inherit;
	text-decoration: none;
	transition: color var(--transition-fast);
}

a:hover {
	color: var(--accent-primary);
}

img {
	max-width: 100%;
	height: auto;
	display: block;
}

ul,
li {
	list-style: none;
}

/*============================================================
Layout
============================================================*/
.container {
	max-width: var(--container-max);
	margin: 0 auto;
	padding: 0 24px;
}

section {
	padding: var(--section-padding) 0;
}

/*============================================================
Theme Toggle Button
============================================================*/
#theme-toggle {
	position: fixed;
	top: 24px;
	right: 24px;
	z-index: 1000;
	width: 48px;
	height: 48px;
	border: none;
	border-radius: 50%;
	background: var(--bg-secondary);
	box-shadow: var(--card-shadow);
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
	transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-slow);
}

#theme-toggle:hover {
	transform: scale(1.1);
	box-shadow: var(--card-shadow-hover);
}

#theme-toggle svg {
	width: 24px;
	height: 24px;
	color: var(--text-primary);
	transition: color var(--transition-slow);
}

#theme-toggle .sun-icon {
	display: block;
}

#theme-toggle .moon-icon {
	display: none;
}

[data-theme="dark"] #theme-toggle .sun-icon {
	display: none;
}

[data-theme="dark"] #theme-toggle .moon-icon {
	display: block;
}

/*============================================================
Background Gradient
============================================================*/
.bg-gradient {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	pointer-events: none;
	z-index: -1;
	opacity: 0.5;
	background:
		radial-gradient(ellipse 80% 50% at 20% 40%, rgba(102, 126, 234, 0.15), transparent),
		radial-gradient(ellipse 60% 40% at 80% 60%, rgba(118, 75, 162, 0.1), transparent);
	animation: gradientShift 20s ease-in-out infinite alternate;
}

@keyframes gradientShift {
	0% {
		transform: translate(0, 0) scale(1);
	}

	100% {
		transform: translate(-5%, 5%) scale(1.1);
	}
}

/*============================================================
Hero Section
============================================================*/
#hero {
	min-height: 100vh;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 40px 24px;
	position: relative;
}

.hero-content {
	text-align: center;
}

/*▼プロフィール画像▼*/
.profile-image-wrapper {
	position: relative;
	width: 180px;
	height: 180px;
	margin: 0 auto 32px;
}

.profile-image {
	width: 100%;
	height: 100%;
	border-radius: 50%;
	object-fit: cover;
	position: relative;
	z-index: 2;
	transition: transform var(--transition-normal);
}

.profile-image-ring {
	position: absolute;
	top: -8px;
	left: -8px;
	width: calc(100% + 16px);
	height: calc(100% + 16px);
	border-radius: 50%;
	background: var(--accent-gradient);
	z-index: 1;
	animation: ringPulse 3s ease-in-out infinite;
}

@keyframes ringPulse {

	0%,
	100% {
		transform: scale(1);
		opacity: 0.8;
	}

	50% {
		transform: scale(1.05);
		opacity: 1;
	}
}

.profile-image-wrapper:hover .profile-image {
	transform: scale(1.05);
}

/*▼ヒーロータイトル▼*/
.hero-title {
	font-family: var(--font-heading);
	font-size: clamp(2rem, 5vw, 3.5rem);
	font-weight: 700;
	letter-spacing: 0.02em;
	margin-bottom: 12px;
}

.hero-title .accent {
	background: var(--accent-gradient);
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
	background-clip: text;
}

.hero-subtitle {
	font-size: 1.1rem;
	color: var(--text-secondary);
	font-weight: 400;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	margin-bottom: 32px;
	display: flex;
	justify-content: center;
	flex-wrap: wrap;
	gap: 0;
}

@media (max-width: 415px) {
	.hero-subtitle {
		flex-direction: column;
		align-items: center;
	}

	.hero-subtitle .subtitle-separator {
		display: none;
	}
}

.hero-subtitle .subtitle-separator {
	padding: 0 0.3em;
}

/*▼ソーシャルリンク▼*/
.hero-links {
	display: flex;
	justify-content: center;
	gap: 16px;
	margin-bottom: 60px;
}

.social-link {
	width: 48px;
	height: 48px;
	display: flex;
	align-items: center;
	justify-content: center;
	border-radius: 50%;
	background: var(--bg-secondary);
	box-shadow: var(--card-shadow);
	transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.social-link:hover {
	transform: translateY(-4px);
	box-shadow: var(--card-shadow-hover);
	background: var(--accent-gradient);
	color: white;
}

.social-link svg {
	width: 22px;
	height: 22px;
}

/*▼スクロールインジケーター▼*/
.scroll-indicator {
	position: absolute;
	bottom: 40px;
	left: 50%;
	transform: translateX(-50%);
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 8px;
	color: var(--text-muted);
	font-size: 0.75rem;
	letter-spacing: 0.2em;
	text-transform: uppercase;
}

.scroll-arrow {
	width: 24px;
	height: 24px;
	border-right: 2px solid var(--text-muted);
	border-bottom: 2px solid var(--text-muted);
	transform: rotate(45deg);
	animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {

	0%,
	100% {
		transform: rotate(45deg) translate(0, 0);
		opacity: 0.5;
	}

	50% {
		transform: rotate(45deg) translate(4px, 4px);
		opacity: 1;
	}
}

/*============================================================
Section Title
============================================================*/
.section-title {
	font-family: var(--font-heading);
	font-size: clamp(2rem, 4vw, 3rem);
	font-weight: 700;
	text-align: center;
	margin-bottom: 60px;
	position: relative;
	letter-spacing: 0.05em;
}

.section-title::after {
	content: '';
	position: absolute;
	bottom: -16px;
	left: 50%;
	transform: translateX(-50%);
	width: 60px;
	height: 4px;
	background: var(--accent-gradient);
	border-radius: 2px;
}

/*============================================================
Profile Section
============================================================*/
.profile-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
	gap: 24px;
}

.profile-card {
	background: var(--bg-secondary);
	border-radius: var(--border-radius);
	padding: 32px;
	box-shadow: var(--card-shadow);
	border: 1px solid var(--border-color);
	transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.profile-card:hover {
	transform: translateY(-4px);
	box-shadow: var(--card-shadow-hover);
}

.profile-card-wide {
	grid-column: 1 / -1;
}

.profile-card h3 {
	font-size: 1.25rem;
	font-weight: 600;
	margin-bottom: 20px;
	background: var(--accent-gradient);
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
	background-clip: text;
}

/*▼アバウトリスト▼*/
.about-list li {
	padding: 12px 0;
	border-bottom: 1px solid var(--border-color);
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
}

.about-list li:last-child {
	border-bottom: none;
}

.about-list .label {
	background: var(--accent-gradient-soft);
	padding: 4px 12px;
	border-radius: 20px;
	font-size: 0.85rem;
	font-weight: 500;
	color: var(--accent-primary);
}

/*▼スキルタグ▼*/
.skill-tags {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
}

.skill-tag {
	background: var(--bg-tertiary);
	padding: 8px 16px;
	border-radius: 20px;
	font-size: 0.9rem;
	font-weight: 500;
	transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.skill-tag:hover {
	background: var(--accent-gradient);
	color: white;
	transform: translateY(-2px);
}

/*▼パーソナリティ▼*/
.personality-text {
	color: var(--text-secondary);
	line-height: 2;
}

/*============================================================
Links Section
============================================================*/
#links {
	background: var(--bg-tertiary);
}

/*▼メインリンク（大きいカード）▼*/
.main-links-grid {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 24px;
	margin-bottom: 60px;
}

.main-link-card-hero {
	grid-column: 1 / -1;
	background: var(--accent-gradient-soft);
}

.main-link-card-hero::before {
	background: linear-gradient(135deg, #1b2838 0%, #66c0f4 100%);
}

.main-link-card {
	display: flex;
	align-items: center;
	gap: 20px;
	background: var(--bg-secondary);
	padding: 32px 40px;
	border-radius: var(--border-radius);
	box-shadow: var(--card-shadow);
	border: 1px solid var(--border-color);
	transition: all var(--transition-normal);
	position: relative;
	overflow: hidden;
}

.main-link-card::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	width: 4px;
	height: 100%;
	background: var(--accent-gradient);
	transform: scaleY(0);
	transition: transform var(--transition-normal);
}

.main-link-card:hover {
	transform: translateY(-6px);
	box-shadow: var(--card-shadow-hover);
	border-color: var(--accent-primary);
	color: var(--text-primary);
}

.main-link-card:hover::before {
	transform: scaleY(1);
}

.main-link-icon {
	font-size: 3rem;
	flex-shrink: 0;
}

.main-link-info {
	flex: 1;
}

.main-link-info h3 {
	font-size: 1.4rem;
	font-weight: 700;
	margin-bottom: 6px;
	background: var(--accent-gradient);
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
	background-clip: text;
}

.main-link-info p {
	font-size: 0.95rem;
	color: var(--text-secondary);
}

.main-link-arrow {
	font-size: 1.5rem;
	color: var(--text-muted);
	transition: transform var(--transition-fast), color var(--transition-fast);
}

.main-link-card:hover .main-link-arrow {
	transform: translateX(8px);
	color: var(--accent-primary);
}

/*▼サブセクション▼*/
.subsection {
	margin-bottom: 32px;
}

.subsection:last-child {
	margin-bottom: 0;
}

.subsection-title {
	font-size: 1.1rem;
	font-weight: 600;
	color: var(--text-secondary);
	margin-bottom: 16px;
	padding-left: 16px;
	border-left: 3px solid var(--accent-primary);
}

.extension-list {
	display: flex;
	flex-direction: column;
	gap: 12px;
}

.extension-item {
	display: flex;
	flex-direction: column;
	gap: 4px;
	background: var(--bg-secondary);
	padding: 16px 24px;
	border-radius: var(--border-radius-sm);
	border: 1px solid var(--border-color);
	transition: all var(--transition-fast);
}

.extension-item:hover {
	border-color: var(--accent-primary);
	transform: translateX(8px);
}

.extension-name {
	font-weight: 500;
}

.extension-desc {
	font-size: 0.85rem;
	color: var(--text-muted);
}

/*============================================================
Works Section
============================================================*/
/*▼カテゴリ▼*/
.works-category {
	margin-bottom: 60px;
}

.works-category:last-child {
	margin-bottom: 0;
}

.works-category-title {
	font-size: 1.5rem;
	font-weight: 700;
	margin-bottom: 32px;
	display: flex;
	align-items: center;
	gap: 12px;
}

.category-icon {
	font-size: 1.8rem;
}

.works-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
	gap: 32px;
}

.works-grid-steam {
	grid-template-columns: repeat(2, 1fr);
}

.works-grid-assets {
	grid-template-columns: repeat(3, 1fr);
}

.works-grid-booth {
	grid-template-columns: repeat(3, 1fr);
}

.works-grid-mobile {
	grid-template-columns: repeat(3, 1fr);
}

.work-card {
	display: block;
	background: var(--bg-secondary);
	border-radius: var(--border-radius);
	overflow: hidden;
	box-shadow: var(--card-shadow);
	border: 1px solid var(--border-color);
	transition: transform var(--transition-normal), box-shadow var(--transition-normal);
	transform-style: preserve-3d;
	perspective: 1000px;
}

.work-card:hover {
	box-shadow: var(--card-shadow-hover);
	color: var(--text-primary);
}

.work-card-large {
	grid-column: span 1;
}

@media (min-width: 768px) {
	.work-card-large {
		grid-column: span 1;
	}

	.work-card-large .work-image-wrapper img {
		width: 100%;
		height: auto;
		max-height: 400px;
		object-fit: cover;
	}
}

.work-image-wrapper {
	overflow: hidden;
	position: relative;
}

.work-image-wrapper::after {
	content: '';
	position: absolute;
	inset: 0;
	background: linear-gradient(to top, rgba(0, 0, 0, 0.3), transparent);
	opacity: 0;
	transition: opacity var(--transition-normal);
}

.work-card:hover .work-image-wrapper::after {
	opacity: 1;
}

.work-image-wrapper img {
	width: 100%;
	height: auto;
	transition: transform var(--transition-slow);
}

.work-card:hover .work-image-wrapper img {
	transform: scale(1.05);
}

.work-info {
	padding: 24px;
}

.work-info h3 {
	font-size: 1.2rem;
	font-weight: 600;
	margin-bottom: 8px;
}

.work-info p {
	font-size: 0.9rem;
	color: var(--text-secondary);
	margin-bottom: 12px;
}

.work-badge {
	display: inline-block;
	padding: 6px 12px;
	border-radius: 20px;
	font-size: 0.75rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.05em;
}

/*▼バッジカラー▼*/
.work-badge-steam {
	background: linear-gradient(135deg, rgba(27, 40, 56, 0.2) 0%, rgba(102, 192, 244, 0.25) 100%);
	color: #4db8ff;
}

[data-theme="dark"] .work-badge-steam {
	background: linear-gradient(135deg, rgba(27, 40, 56, 0.5) 0%, rgba(102, 192, 244, 0.3) 100%);
	color: #7dcfff;
}

.work-badge-unity {
	background: linear-gradient(135deg, rgba(100, 100, 100, 0.15) 0%, rgba(150, 150, 150, 0.15) 100%);
	color: #444444;
}

[data-theme="dark"] .work-badge-unity {
	background: linear-gradient(135deg, rgba(120, 120, 120, 0.25) 0%, rgba(200, 200, 200, 0.15) 100%);
	color: #e0e0e0;
}

.work-badge-android {
	background: linear-gradient(135deg, rgba(61, 220, 132, 0.15) 0%, rgba(52, 168, 83, 0.15) 100%);
	color: #34a853;
}

.work-badge-booth {
	background: linear-gradient(135deg, rgba(255, 70, 70, 0.15) 0%, rgba(200, 40, 80, 0.15) 100%);
	color: #e53935;
}

[data-theme="dark"] .work-badge-booth {
	background: linear-gradient(135deg, rgba(255, 70, 70, 0.25) 0%, rgba(200, 40, 80, 0.2) 100%);
	color: #ff6f6f;
}

/*▼シンプルカード（画像なし）▼*/
.work-card-simple {
	display: flex;
	align-items: center;
	padding: 32px;
}

.work-card-simple .work-info {
	padding: 0;
}

/*============================================================
Footer
============================================================*/
#footer {
	padding: 40px 0;
	text-align: center;
}

.copyright {
	font-size: 0.85rem;
	color: var(--text-muted);
}

/*============================================================
Animations - Initial States
============================================================*/
[data-animate] {
	opacity: 0;
	transform: translateY(40px);
}

/*============================================================
Responsive
============================================================*/
@media (max-width: 768px) {
	:root {
		--section-padding: 80px;
	}

	.profile-image-wrapper {
		width: 140px;
		height: 140px;
	}

	.profile-grid {
		grid-template-columns: 1fr;
	}

	.main-links-grid {
		grid-template-columns: 1fr;
	}

	.main-link-card {
		padding: 24px 28px;
	}

	.main-link-icon {
		font-size: 2.5rem;
	}

	.main-link-info h3 {
		font-size: 1.2rem;
	}

	.works-grid,
	.works-grid-steam,
	.works-grid-assets,
	.works-grid-booth {
		grid-template-columns: 1fr;
	}

	.work-card-large {
		grid-column: span 1;
	}

	#theme-toggle {
		top: 16px;
		right: 16px;
		width: 40px;
		height: 40px;
	}

	#theme-toggle svg {
		width: 20px;
		height: 20px;
	}
}

@media (max-width: 480px) {
	.hero-links {
		gap: 12px;
	}

	.social-link {
		width: 40px;
		height: 40px;
	}

	.social-link svg {
		width: 18px;
		height: 18px;
	}

	.main-link-card {
		padding: 20px 24px;
	}

	.main-link-icon {
		font-size: 2rem;
	}
}