/* ============================================
   Creative Portfolio - Style System
   モノトーン・ミニマリズムデザイン
   ============================================ */

/* ===========================================
   1. CSS Custom Properties (Design Tokens)
   =========================================== */
:root {
    /* Colors - Champagne Gold & Light Gray Scheme */
    --color-black: #2C2C2C;
    /* 少し柔らかい黒 */
    --color-dark: #4A4A4A;
    --color-gray-dark: #6E6E6E;
    --color-gray: #313131;
    --color-gray-light: #C0C0C0;
    --color-gray-lighter: #E0E0E0;
    --color-light: #F8F8F8;
    /* 非常に薄いグレー */
    --color-white: #ffffff;

    /* Accent Colors - Champagne Gold */
    --color-gold: #ffda61;
    --color-gold-light: #F3E5AB;
    /* シャンパン */
    --color-gold-dark: #ffe07a;

    /* Functional Colors */
    /* 背景をシャンパンゴールドのグラデーションに変更 */
    --color-bg-alt: var(--color-white);
    --color-bg-dark: var(--color-black);
    --color-text: var(--color-dark);
    /* テキストをダークグレーに */
    --color-text-muted: var(--color-gray);
    --color-text-light: var(--color-gray-light);
    --color-border: rgba(212, 175, 55, 0.2);
    /* ゴールドの薄いボーダー */
    --color-border-dark: rgba(212, 175, 55, 0.1);

    /* Typography */
    --font-en: 'Inter', sans-serif;
    --font-jp: 'Noto Sans JP', sans-serif;
    --font-jp-serif: 'Shippori Mincho', serif;

    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --text-4xl: 2.5rem;
    --text-5xl: 3.5rem;
    --text-6xl: 5rem;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;

    /* Layout */
    --container-max: 1200px;
    --container-wide: 1400px;
    --header-height: 80px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-slower: 0.8s ease;

    /* Z-index */
    --z-header: 100;
    --z-mobile-menu: 90;
    --z-modal: 200;
    --z-loader: 300;
}

/* ===========================================
   2. Base Styles (Reset + Foundation)
   =========================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-jp);
    font-weight: 400;
    line-height: 1.8;
    color: var(--color-text);
    color: var(--color-text);
    color: var(--color-text);
    background: linear-gradient(135deg, #000000 0%, #000000 100%);
    background-attachment: fixed;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.no-scroll {
    overflow: hidden;
}

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

a:hover {
    opacity: 0.7;
}

ul,
ol {
    list-style: none;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ===========================================
   3. Typography
   =========================================== */
.font-en {
    font-family: var(--font-en);
}

.font-jp-serif {
    font-family: var(--font-jp-serif);
}

/* ===========================================
   4. Layout & Container
   =========================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.container-wide {
    max-width: var(--container-wide);
}

/* ===========================================
   5. Loader
   =========================================== */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-black);
    z-index: var(--z-loader);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-inner {
    text-align: center;
}

.loader-text {
    display: block;
    font-family: var(--font-en);
    font-size: var(--text-xl);
    font-weight: 600;
    letter-spacing: 0.3em;
    color: var(--color-white);
    margin-bottom: var(--space-lg);
}

.loader-bar {
    width: 120px;
    height: 2px;
    background: var(--color-gray-dark);
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.loader-bar::after {
    content: '';
    position: absolute;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--color-gold);
    animation: loaderBar 1.5s ease-in-out infinite;
}

@keyframes loaderBar {
    0% {
        left: -100%;
    }

    50% {
        left: 0;
    }

    100% {
        left: 100%;
    }
}

/* ===========================================
   6. Header
   =========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: var(--z-header);
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.header.scrolled {
    background: rgba(0, 0, 0, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.logo {
    display: flex;
    align-items: center;
}

.logo-text {
    font-family: var(--font-en);
    font-size: var(--text-lg);
    font-weight: 700;
    letter-spacing: 0.15em;
    /* color: var(--color-black); */
    color: #ffffff;
}

.nav-list {
    display: flex;
    gap: var(--space-2xl);
}

.nav-link {
    font-family: var(--font-en);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    /* color: var(--color-text); */
    color: #ffffff;
    position: relative;
    padding: var(--space-sm) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-black);
    transition: width var(--transition-base);
}

.nav-link:hover {
    opacity: 1;
}

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

/* Hamburger */
.hamburger {
    display: none;
    width: 28px;
    height: 20px;
    position: relative;
    z-index: calc(var(--z-mobile-menu) + 10);
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-black);
    position: absolute;
    left: 0;
    transition: all var(--transition-base);
}

.hamburger span:nth-child(1) {
    top: 0;
}

.hamburger span:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
}

.hamburger span:nth-child(3) {
    bottom: 0;
}

.hamburger.active span:nth-child(1) {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    bottom: 50%;
    transform: translateY(50%) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--color-white);
    z-index: var(--z-mobile-menu);
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-slow);
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-list {
    text-align: center;
}

.mobile-nav-link {
    display: block;
    font-family: var(--font-en);
    font-size: var(--text-3xl);
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: var(--space-lg) 0;
    transform: translateY(20px);
    opacity: 0;
    transition: all var(--transition-base);
}

.mobile-menu.active .mobile-nav-link {
    transform: translateY(0);
    opacity: 1;
}

.mobile-menu.active .mobile-nav-link:nth-child(1) {
    transition-delay: 0.1s;
}

.mobile-menu.active .mobile-nav-link:nth-child(2) {
    transition-delay: 0.2s;
}

.mobile-menu.active .mobile-nav-link:nth-child(3) {
    transition-delay: 0.3s;
}

/* ===========================================
   7. Hero Section
   =========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: var(--color-black);
    padding: var(--header-height) var(--space-xl) var(--space-3xl);
}

/* 背景画像レイヤー - 5点スクロール切り替え */
.hero-bg-layers {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

.hero-bg-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 3s cubic-bezier(0.22, 1, 0.36, 1);
    background-size: cover;
    background-position: center;
    transform: scale(1.05);
}

.hero-bg-layer.active {
    opacity: 1;
    transform: scale(1);
    transition: opacity 3s cubic-bezier(0.22, 1, 0.36, 1),
        transform 12s cubic-bezier(0.22, 1, 0.36, 1);
}

/* 背景画像1 - ダーク・ミニマル */
.hero-bg-layer[data-layer="1"] {
    background-image:
        linear-gradient(135deg, rgba(10, 10, 10, 0.7) 0%, rgba(30, 30, 40, 0.6) 100%),
        url('https://images.unsplash.com/photo-1557683316-973673baf926?w=1920&q=80');
    background-color: #0a0a0a;
}

/* 背景画像2 - ディープブルー */
.hero-bg-layer[data-layer="2"] {
    background-image:
        linear-gradient(135deg, rgba(10, 20, 40, 0.8) 0%, rgba(20, 40, 80, 0.6) 100%),
        url('https://images.unsplash.com/photo-1579546929518-9e396f3cc809?w=1920&q=80');
    background-color: #0a1428;
}

/* 背景画像3 - パープル・グラデ */
.hero-bg-layer[data-layer="3"] {
    background-image:
        linear-gradient(135deg, rgba(40, 20, 60, 0.8) 0%, rgba(80, 40, 100, 0.6) 100%),
        url('https://images.unsplash.com/photo-1558591710-4b4a1ae0f04d?w=1920&q=80');
    background-color: #28143c;
}

/* 背景画像4 - サンセット・オレンジ */
.hero-bg-layer[data-layer="4"] {
    background-image:
        linear-gradient(135deg, rgba(60, 30, 20, 0.8) 0%, rgba(120, 60, 40, 0.6) 100%),
        url('https://images.unsplash.com/photo-1518837695005-2083093ee35b?w=1920&q=80');
    background-color: #3c1e14;
}

/* 背景画像5 - エレガント・ゴールド（テクスチャ） */
.hero-bg-layer[data-layer="5"] {
    background-image:
        linear-gradient(135deg, rgba(255, 250, 240, 0.2) 0%, rgba(212, 175, 55, 0.1) 100%),
        url('https://images.unsplash.com/photo-1550684848-fac1c5b4e853?w=1920&q=80');
    background-color: #f7f2e6;
}

/* オーバーレイ */
.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    background: linear-gradient(180deg,
            rgba(0, 0, 0, 0.4) 0%,
            rgba(0, 0, 0, 0.2) 40%,
            rgba(0, 0, 0, 0.1) 60%,
            rgba(0, 0, 0, 0.6) 100%);
    pointer-events: none;
}

/* パーティクル効果 */
.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 3;
    pointer-events: none;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    animation: particleFloat 8s infinite ease-in-out;
}

@keyframes particleFloat {

    0%,
    100% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        transform: translateY(-100vh) translateX(50px);
        opacity: 0;
    }
}

/* スクロールプログレス */
.scroll-progress {
    position: fixed;
    left: 0;
    top: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, #D4AF37, #F0E68C, #D4AF37);
    z-index: 150;
    transition: width 0.1s linear;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 10;
}

.hero-title-wrapper {
    overflow: hidden;
    margin-bottom: var(--space-lg);
}

.hero-title {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-title-line {
    display: block;
    font-family: var(--font-en);
    font-size: clamp(3rem, 12vw, var(--text-6xl));
    font-weight: 700;
    letter-spacing: 0.15em;
    line-height: 1.1;
    color: var(--color-white);
    opacity: 0;
    transform: translateY(100%);
    position: relative;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

/* グリッチエフェクト用 */
.hero-title-line::before,
.hero-title-line::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
}

.hero-title-line::before {
    color: #ff6b6b;
    animation: glitch1 3s infinite;
    clip-path: polygon(0 0, 100% 0, 100% 45%, 0 45%);
}

.hero-title-line::after {
    color: #4ecdc4;
    animation: glitch2 3s infinite;
    clip-path: polygon(0 55%, 100% 55%, 100% 100%, 0 100%);
}

@keyframes glitch1 {

    0%,
    90%,
    100% {
        opacity: 0;
        transform: translate(0);
    }

    92% {
        opacity: 0.8;
        transform: translate(-3px, -2px);
    }

    94% {
        opacity: 0;
        transform: translate(0);
    }
}

@keyframes glitch2 {

    0%,
    90%,
    100% {
        opacity: 0;
        transform: translate(0);
    }

    93% {
        opacity: 0.8;
        transform: translate(3px, 2px);
    }

    95% {
        opacity: 0;
        transform: translate(0);
    }
}

.hero-subtitle {
    font-family: var(--font-en);
    font-size: var(--text-lg);
    font-weight: 400;
    letter-spacing: 0.2em;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-2xl);
    opacity: 0;
    transform: translateY(20px);
}

.hero-tagline {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    opacity: 0;
    transform: translateY(20px);
}

.tagline-item {
    font-family: var(--font-en);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.5);
    transition: color 0.3s ease, transform 0.3s ease;
}

.tagline-item:hover {
    color: #D4AF37;
    transform: translateY(-2px);
}

.tagline-divider {
    color: rgba(255, 255, 255, 0.3);
}

.hero-scroll {
    position: absolute;
    bottom: var(--space-3xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 0;
    z-index: 10;
}

.scroll-text {
    font-family: var(--font-en);
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: var(--space-md);
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: rgba(255, 255, 255, 0.3);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: -100%;
    width: 100%;
    height: 50%;
    background: #D4AF37;
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0% {
        top: -50%;
    }

    100% {
        top: 150%;
    }
}

/* ===========================================
   8. Section Header
   =========================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
}

.section-number {
    display: block;
    font-family: var(--font-en);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.3em;
    color: var(--color-gray-light);
    margin-bottom: var(--space-md);
}

.section-title {
    font-family: var(--font-en);
    font-size: clamp(var(--text-3xl), 5vw, var(--text-4xl));
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--color-black);
    margin-bottom: var(--space-sm);
}

.section-title-ja {
    display: block;
    font-family: var(--font-jp-serif);
    font-size: var(--text-sm);
    font-weight: 400;
    letter-spacing: 0.2em;
    color: var(--color-black);
}

/* ===========================================
   9. Profile Section
   =========================================== */
.profile {
    padding: var(--space-5xl) 0;
    background: var(--color-bg);
}

.profile-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: start;
}

.profile-main {
    display: flex;
    flex-direction: column;
    gap: var(--space-3xl);
}

.profile-heading {
    font-family: var(--font-en);
    font-size: var(--text-xl);
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--color-black);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
}

.profile-text {
    font-size: var(--text-base);
    line-height: 2;
    color: var(--color-black);
    margin-bottom: var(--space-md);
}

.profile-text:last-child {
    margin-bottom: 0;
}

.strengths-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-top: 10%;
}

.strength-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-light);
    border-radius: 4px;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.strength-item:hover {
    transform: translateX(8px);
    box-shadow: -4px 0 0 var(--color-black);
}

.strength-icon {
    font-family: var(--font-en);
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--color-gray-light);
    flex-shrink: 0;
}

.strength-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.strength-title {
    font-family: var(--font-en);
    font-size: var(--text-base);
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--color-black);
}

.strength-desc {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.profile-visual {
    position: sticky;
    top: calc(var(--header-height) + var(--space-xl));
}

.profile-image-wrapper {
    position: relative;
}

.profile-image-bg {
    position: absolute;
    top: var(--space-lg);
    left: var(--space-lg);
    width: 100%;
    height: 100%;
    background: var(--color-light);
    z-index: -1;
}

.profile-image {
    width: 100%;
    height: auto;
    filter: grayscale(100%);
    transition: filter var(--transition-slow);
}

.profile-image-wrapper:hover .profile-image {
    filter: grayscale(0%);
}

/* ===========================================
   10. Works Section
   =========================================== */
.works {
    padding: var(--space-5xl) 0;
    background: var(--color-bg-alt);
}

.works-note {
    text-align: center;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-3xl);
}

.works-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.work-card {
    display: block;
    background: var(--color-white);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.work-card:hover {
    opacity: 1;
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(145, 6, 6, 0.1);
}

.card-visual {
    position: relative;
    overflow: hidden;
    aspect-ratio: 3 / 2;
    /* cursor: zoom-in; */
}

.card-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.card-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.work-card:hover .card-overlay {
    opacity: 1;
}

.card-view {
    font-family: var(--font-en);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--color-white);
    padding: var(--space-sm) var(--space-lg);
    border: 1px solid var(--color-white);
    transform: translateY(10px);
    transform: translateY(10px);
    transition: transform var(--transition-base);
    /* cursor: zoom-in; */
}

.work-card:hover .card-view {
    transform: translateY(0);
}

.card-info {
    padding: var(--space-lg);
}

.card-category {
    display: block;
    font-family: var(--font-en);
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--color-gray-light);
    text-transform: uppercase;
    margin-bottom: var(--space-sm);
}

.card-title {
    font-family: var(--font-en);
    font-size: var(--text-lg);
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--color-black);
    margin-bottom: var(--space-xs);
}

.card-desc {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* ===========================================
   11. Works Detail Sections
   =========================================== */
.works-detail {
    background: var(--color-bg);
}

.detail-section {
    padding: var(--space-5xl) 0;
    border-bottom: 0px solid var(--color-border);
}

.detail-section:last-child {
    border-bottom: none;
}

.detail-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
    flex-wrap: wrap;
}

.detail-title-wrapper {
    flex: 1;
    min-width: 200px;
}

.detail-category {
    display: block;
    font-family: var(--font-en);
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.15em;
    color: var(--color-black);
    text-transform: uppercase;
    margin-bottom: var(--space-sm);
}

.detail-title {
    font-family: var(--font-en);
    font-size: var(--text-3xl);
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-black);
}

.detail-meta {
    display: flex;
    gap: var(--space-2xl);
    flex-wrap: wrap;
    padding: var(--space-lg);
    background: var(--color-light);
    border-radius: 4px;
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.meta-label {
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--color-gray-light);
}

.meta-value {
    font-size: var(--text-sm);
    color: var(--color-text);
}

.detail-desc {
    font-size: var(--text-base);
    line-height: 2;
    color: var(--color-text-muted);
    margin-bottom: var(--space-3xl);
    max-width: 800px;
}

/* Before/After Slider */
.before-after-section {
    margin-bottom: var(--space-3xl);
}

.ba-title {
    font-family: var(--font-en);
    font-size: var(--text-lg);
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--color-black);
    margin-bottom: var(--space-lg);
    text-align: center;
}

.before-after-container {
    max-width: 800px;
    margin: 0 auto;
}

.before-after-wrapper {
    position: relative;
    overflow: hidden;
    cursor: ew-resize;
    user-select: none;
}

.ba-before,
.ba-after {
    width: 100%;
    height: auto;
    display: block;
}

.ba-after {
    position: absolute;
    top: 0;
    left: 0;
    clip-path: inset(0 50% 0 0);
}

.ba-slider {
    position: absolute;
    top: 0;
    left: 50%;
    width: 4px;
    height: 100%;
    background: var(--color-white);
    transform: translateX(-50%);
    cursor: ew-resize;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}

.ba-handle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 48px;
    height: 48px;
    background: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.ba-arrow {
    width: 0;
    height: 0;
    border-style: solid;
}

.ba-arrow.left {
    border-width: 6px 8px 6px 0;
    border-color: transparent var(--color-black) transparent transparent;
}

.ba-arrow.right {
    border-width: 6px 0 6px 8px;
    border-color: transparent transparent transparent var(--color-black);
}

/* Detail Gallery */
.detail-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.gallery-item {
    position: relative;
    overflow: hidden;
    /* cursor: zoom-in; */
    background: var(--color-light);
}

.gallery-item.wide {
    grid-column: span 2;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.gallery-item:hover img {
    transform: scale(1.05);
}

/* ===========================================
   12. Footer
   =========================================== */
.footer {
    background: var(--color-dark);
    color: var(--color-white);
    padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-3xl);
    padding-bottom: var(--space-3xl);
    border-bottom: 1px solid var(--color-gold-light);
}

.footer-logo {
    font-family: var(--font-en);
    font-size: var(--text-xl);
    font-weight: 700;
    letter-spacing: 0.15em;
}

.footer-tagline {
    font-size: var(--text-sm);
    color: var(--color-white);
    margin-top: var(--space-sm);
}

.footer-links {
    display: flex;
    gap: var(--space-xl);
}

.footer-link {
    font-family: var(--font-en);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--color-gray-light);
    transition: color var(--transition-base);
}

.footer-link:hover {
    opacity: 1;
    color: var(--color-white);
}

.footer-bottom {
    text-align: center;
}

.copyright {
    font-size: var(--text-xs);
    color: var(--color-white);
    letter-spacing: 0.1em;
}

/* ===========================================
   13. Modal
   =========================================== */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: var(--z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-close {
    position: absolute;
    top: var(--space-xl);
    right: var(--space-xl);
    font-size: var(--text-4xl);
    color: var(--color-white);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-base);
}

.modal-close:hover {
    transform: rotate(90deg);
}

.modal-image {
    max-width: 90%;
    max-height: 90vh;
    object-fit: contain;
}

/* ===========================================
   14. Animations & Utilities
   =========================================== */

/* 基本フェードアップ */
.fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity var(--transition-slower), transform var(--transition-slower);
}

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

/* Reveal アニメーション */
.reveal-left {
    opacity: 0;
    transform: translateX(-60px);
    transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(60px);
    transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-scale.visible {
    opacity: 1;
    transform: scale(1);
}

/* 段階的子要素表示 */
.stagger-children>* {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.stagger-children.visible>*:nth-child(1) {
    transition-delay: 0.1s;
}

.stagger-children.visible>*:nth-child(2) {
    transition-delay: 0.2s;
}

.stagger-children.visible>*:nth-child(3) {
    transition-delay: 0.3s;
}

.stagger-children.visible>*:nth-child(4) {
    transition-delay: 0.4s;
}

.stagger-children.visible>*:nth-child(5) {
    transition-delay: 0.5s;
}

.stagger-children.visible>*:nth-child(6) {
    transition-delay: 0.6s;
}

.stagger-children.visible>* {
    opacity: 1;
    transform: translateY(0);
}

/* パララックスレイヤー */
.parallax-layer {
    will-change: transform;
    transition: transform 0.1s linear;
}

/* ===========================================
   15. Enhanced Section Backgrounds
   =========================================== */

/* Profile セクション - エレガントなグラデーション */
.profile {
    padding: var(--space-5xl) 0;
    background: linear-gradient(180deg,
            #c0c0c0 0%,
            #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.profile::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 60%;
    height: 100%;
    background: radial-gradient(ellipse, rgba(100, 150, 200, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.profile::after {
    content: '';
    position: absolute;
    bottom: -30%;
    right: -10%;
    width: 50%;
    height: 80%;
    background: radial-gradient(ellipse, rgba(200, 180, 150, 0.06) 0%, transparent 60%);
    pointer-events: none;
}

/* Works セクション - リッチなグラデーション */
.works {
    padding: var(--space-5xl) 0;
    background: linear-gradient(180deg,
            #ffffff 0%,
            #c0c0c0 100%);
    position: relative;
}

.works::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 30%, rgba(150, 120, 180, 0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(180, 150, 120, 0.04) 0%, transparent 50%);
    pointer-events: none;
}

.works::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.329), transparent);
}

/* Works Detail - 交互の背景 */
.works-detail {
    background: transparent;
}

.detail-section {
    padding: var(--space-5xl) 0;
    border-bottom: 0px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.detail-section:nth-child(1) {
    background: linear-gradient(180deg,
            #c0c0c0 0%,
            #ffffff 100%);
}

.detail-section:nth-child(2) {
    background: linear-gradient(180deg,
            #ffffff 0%,
            #c0c0c0 100%);
}

.detail-section:nth-child(3) {
    background: linear-gradient(180deg,
            #c0c0c0 0%,
            #ffffff 100%);
}

.detail-section:nth-child(4) {
    background: linear-gradient(180deg,
            #ffffff 0%,
            #c0c0c0 100%);
}

.detail-section:nth-child(5) {
    background: linear-gradient(180deg,
            #c0c0c0 0%,
            #ffffff 100%);
}

.detail-section:nth-child(6) {
    background: linear-gradient(180deg,
            #ffffff 0%,
            #c0c0c0 100%);
}

.detail-section:nth-child(7) {
    background: linear-gradient(180deg,
            #c0c0c0  0%,
            #ffffff 100%);
}

.detail-section:nth-child(odd)::before {
    content: '';
    position: absolute;
    top: 0;
    right: -10%;
    width: 40%;
    height: 100%;
    background: radial-gradient(ellipse at top right, rgba(212, 175, 55, 0.02) 0%, transparent 60%);
    pointer-events: none;
}

/* Footer - 洗練されたグラデーション */
.footer {
    background: linear-gradient(180deg,
            #1a1a1a 0%,
            #0f0f0f 50%,
            #0a0a0a 100%);
    color: var(--color-white);
    padding: var(--space-4xl) 0 var(--space-xl);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.3), transparent);
}

/* ===========================================
   16. Micro Interactions
   =========================================== */

/* カード ホバーエフェクト強化 */
.work-card {
    display: block;
    background: var(--color-white);
    overflow: hidden;
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
        box-shadow 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    position: relative;
}

.work-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 197, 5, 0.1) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 1;
    pointer-events: none;
}

.work-card:hover::before {
    opacity: 1;
}

.work-card:hover {
    opacity: 1;
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.15),
        0 10px 20px rgba(0, 0, 0, 0.1);
}

/* Strength Item ホバー強化 */
.strength-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-light);
    border-radius: 4px;
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
        box-shadow 0.4s cubic-bezier(0.22, 1, 0.36, 1),
        background 0.4s ease;
    position: relative;
    overflow: hidden;
}

.strength-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, #ffcf2f 0%, #ffd931 100%);
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.strength-item:hover {
    transform: translateX(8px);
    box-shadow: 0 10px 30px rgba(129, 6, 6, 0.08);
    background: var(--color-white);
}

.strength-item:hover::before {
    transform: scaleY(1);
}

/* Gallery Item ホバー強化 */
.gallery-item {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    background: var(--color-light);
    border-radius: 4px;
}

.gallery-item::after {
    content: 'View';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    font-family: var(--font-en);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--color-white);
    padding: var(--space-sm) var(--space-lg);
    border: 1px solid rgba(255, 255, 255, 0.8);
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
    z-index: 10;
}

.gallery-item:hover::after {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1),
        filter 0.4s ease;
}

.gallery-item:hover {
    transform: scale(1.1);
    filter: brightness(0.8);
}

/* ===========================================
   17. Text Split Animation Styles
   =========================================== */
.split-text .char {
    display: inline-block;
    opacity: 0;
    transform: translateY(100%);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.split-text.animate .char {
    opacity: 1;
    transform: translateY(0);
}

/* Section Title エンハンスメント */
.section-title {
    font-family: var(--font-en);
    font-size: clamp(var(--text-3xl), 5vw, var(--text-4xl));
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--color-black);
    margin-bottom: var(--space-sm);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, #D4AF37, transparent);
    transition: width 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.section-header.visible .section-title::after {
    width: 60%;
}

/* ===========================================
   18. Cursor Effects (カスタムカーソル)
   =========================================== */
.custom-cursor {
    position: fixed;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(212, 175, 55, 0.5);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width 0.2s ease, height 0.2s ease, background 0.2s ease;
    mix-blend-mode: difference;
}

.custom-cursor.hover {
    width: 50px;
    height: 50px;
    background: rgba(212, 175, 55, 0.2);
}

/* ===========================================
   19. Loading States
   =========================================== */
.section-loading {
    opacity: 0.5;
    filter: blur(5px);
    transition: opacity 0.4s ease, filter 0.4s ease;
}

.section-loaded {
    opacity: 1;
    filter: blur(0);
}

/* ===========================================
   15. Responsive Design
   =========================================== */

/* Tablet */
@media (max-width: 1024px) {
    .works-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .profile-content {
        grid-template-columns: 1fr;
        gap: var(--space-3xl);
    }

    .profile-visual {
        position: relative;
        top: auto;
        order: -1;
        max-width: 400px;
        margin: 0 auto;
    }

    .detail-header {
        flex-direction: column;
    }

    .detail-meta {
        width: 100%;
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }

    .nav {
        display: none;
    }

    .hamburger {
        display: block;
    }

    .mobile-menu {
        display: flex;
    }

    .hero {
        padding-bottom: var(--space-5xl);
    }

    .hero-tagline {
        flex-wrap: wrap;
    }

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

    .section-header {
        margin-bottom: var(--space-3xl);
    }

    .profile,
    .works,
    .detail-section {
        padding: var(--space-4xl) 0;
    }

    .detail-gallery {
        grid-template-columns: 1fr;
    }

    .gallery-item.wide {
        grid-column: span 1;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--space-xl);
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }

    .container {
        padding: 0 var(--space-lg);
    }

    .strength-item {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .detail-meta {
        flex-direction: column;
        gap: var(--space-md);
    }

    .before-after-container {
        max-width: 100%;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .hero-title-line {
        letter-spacing: 0.08em;
    }

    .hero-subtitle {
        font-size: var(--text-base);
        letter-spacing: 0.1em;
    }

    .modal-close {
        top: var(--space-md);
        right: var(--space-md);
    }
}

/* ===========================================
   10. Scroll to Top Button
   =========================================== */
.scroll-top {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 50px;
    height: 50px;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 95;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top:hover {
    background: var(--color-black);
    border-color: var(--color-black);
    transform: translateY(-5px);
}

.scroll-top-arrow {
    width: 10px;
    height: 10px;
    border-top: 2px solid var(--color-black);
    border-left: 2px solid var(--color-black);
    transform: rotate(45deg) translate(2px, 2px);
    transition: border-color var(--transition-base);
}

.scroll-top:hover .scroll-top-arrow {
    border-color: var(--color-white);
}

@media (max-width: 768px) {
    .scroll-top {
        bottom: var(--space-md);
        right: var(--space-md);
        width: 40px;
        height: 40px;
    }
}

/* ===========================================
   13. Modal Navigation
   =========================================== */
.modal-prev,
.modal-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--color-white);
    cursor: pointer;
    z-index: 210;
    transition: all var(--transition-base);
    backdrop-filter: blur(5px);
}

.modal-prev:hover,
.modal-next:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: var(--color-white);
    transform: translateY(-50%) scale(1.1);
}

.modal-prev {
    left: var(--space-xl);
}

.modal-next {
    right: var(--space-xl);
}

@media (max-width: 768px) {

    .modal-prev,
    .modal-next {
        width: 40px;
        height: 40px;
        font-size: 18px;
        background: rgba(0, 0, 0, 0.3);
    }

    .modal-prev {
        left: var(--space-md);
    }

    .modal-next {
        right: var(--space-md);
    }
}
/* ===========================================
   15. Strength Modal
   =========================================== */
.strength-item {
    cursor: pointer;
    position: relative;
    padding: var(--space-lg);
    border: 1px solid transparent;
    border-radius: 8px;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.strength-item:hover {
    background: linear-gradient(#d4d4d4, #ffffff);
    border-color: var(--color-border);
    transform: translateY(-5px);
}

.strength-link-icon {
    margin-left: auto;
    width: 20px;
    height: 20px;
    position: relative;
    opacity: 0.3;
    transition: opacity var(--transition-base);
}

.strength-item:hover .strength-link-icon {
    opacity: 1;
}

.strength-link-icon::after {
    content: '+';
    font-family: var(--font-en);
    font-size: 24px;
    line-height: 1;
    color: var(--color-gold);
}

.strength-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-modal);
    display: none;
    align-items: center;
    justify-content: flex-end;
    pointer-events: none;
}

.strength-modal.active {
    display: flex;
    pointer-events: all;
}

.strength-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    opacity: 0;
    transition: opacity 0.5s ease;
}

.strength-modal.active .strength-modal-overlay {
    opacity: 1;
}

.strength-modal-container {
    position: relative;
    width: 50%;
    height: 100%;
    background: var(--color-black);
    border-left: 1px solid var(--color-border);
    padding: var(--space-5xl) var(--space-4xl);
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
    display: flex;
    flex-direction: column;
}

.strength-modal.active .strength-modal-container {
    transform: translateX(0);
}

.strength-modal-close {
    position: absolute;
    top: var(--space-xl);
    right: var(--space-xl);
    font-size: 40px;
    color: var(--color-white);
    opacity: 0.6;
    transition: opacity 0.3s ease;
    z-index: 10;
}

.strength-modal-close:hover {
    opacity: 1;
}

.strength-modal-header {
    margin-bottom: var(--space-3xl);
}

.strength-modal-number {
    display: block;
    font-family: var(--font-en);
    font-size: var(--text-base);
    color: var(--color-gold);
    margin-bottom: var(--space-sm);
    letter-spacing: 0.2em;
}

.strength-modal-title {
    font-family: var(--font-en);
    font-size: var(--text-4xl);
    color: var(--color-white);
    letter-spacing: 0.05em;
    line-height: 1.2;
}

.strength-modal-body {
    color: var(--color-gray-lighter);
    font-size: var(--text-lg);
    line-height: 2;
}

.strength-modal-body strong {
    color: var(--color-white);
    display: block;
    margin-bottom: var(--space-md);
    font-size: var(--text-xl);
}

.strength-modal-body p {
    margin-bottom: var(--space-xl);
}

@media (max-width: 992px) {
    .strength-modal-container {
        width: 70%;
    }
}

@media (max-width: 768px) {
    .strength-modal-container {
        width: 100%;
        padding: var(--space-4xl) var(--space-xl);
    }
    
    .strength-modal-title {
        font-size: var(--text-3xl);
    }
}