/* ==================== VARIABLES ==================== */
:root {
    --color-bg: #FAFAF8;
    --color-bg-warm: #F5F4F0;
    --color-bg-dark: #1A1918;
    --color-text: #1A1A1A;
    --color-text-muted: #6B6B6B;
    --color-text-light: #999999;
    --color-accent: #8B7355;
    --color-accent-warm: #C4A882;
    --color-border: #E8E6E3;
    --color-border-light: #F0EEEB;
    --color-white: #FFFFFF;
    
    --font-display: 'Cormorant Garamond', serif;
    --font-japanese: 'Noto Serif JP', serif;
    --font-body: 'Noto Sans JP', sans-serif;
    --font-ui: 'DM Sans', sans-serif;
    
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==================== RESET ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    font-weight: 300;
    line-height: 1.8;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

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

button {
    font-family: inherit;
    cursor: pointer;
}

/* ==================== HEADER ==================== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1.25rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.4s ease, padding 0.4s ease;
}

header.scrolled {
    background: rgba(250, 250, 248, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 3rem;
}

.logo {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.logo-main {
    font-family: var(--font-ui);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--color-text);
}

.logo-sub {
    font-family: var(--font-japanese);
    font-size: 0.65rem;
    font-weight: 300;
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
}

nav {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

nav a {
    font-family: var(--font-ui);
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    transition: color 0.3s ease;
    position: relative;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width 0.3s var(--ease-out-quart);
}

nav a:hover {
    color: var(--color-text);
}

nav a:hover::after {
    width: 100%;
}

.nav-lang {
    font-size: 0.7rem;
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 2px;
}

/* ==================== HERO ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 0 6rem;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 580px;
    z-index: 2;
}

.hero-tagline {
    font-family: var(--font-ui);
    font-size: 0.7rem;
    font-weight: 400;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 1.5rem;
}

.hero-title {
    font-family: var(--font-display);
    font-size: 4.5rem;
    font-weight: 300;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}

.hero-title-jp {
    font-family: var(--font-japanese);
    font-size: 1.1rem;
    font-weight: 300;
    color: var(--color-text-muted);
    letter-spacing: 0.15em;
    margin-bottom: 2rem;
}

.hero-desc {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    max-width: 420px;
    margin-bottom: 2.5rem;
    line-height: 1.9;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-ui);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text);
    padding: 1rem 0;
    transition: gap 0.3s var(--ease-out-quart);
}

.hero-cta:hover {
    gap: 1.25rem;
}

.hero-cta svg {
    width: 20px;
    height: 20px;
    transition: transform 0.3s var(--ease-out-quart);
}

.hero-visual {
    position: absolute;
    right: 6rem;
    top: 50%;
    transform: translateY(-50%);
    width: 45%;
    max-width: 600px;
}

.hero-product {
    width: 100%;
    aspect-ratio: 1;
    background: linear-gradient(145deg, #f0eeeb 0%, #e8e6e3 100%);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.hero-product-placeholder {
    width: 70%;
    height: 70%;
    background: linear-gradient(145deg, var(--color-accent-warm), var(--color-accent));
    border-radius: 2px;
    opacity: 0.15;
}

/* ==================== SECTION STYLES ==================== */
section {
    padding: 7rem 6rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-label {
    font-family: var(--font-ui);
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 300;
    letter-spacing: -0.01em;
    margin-bottom: 0.5rem;
}

.section-title-jp {
    font-family: var(--font-japanese);
    font-size: 0.9rem;
    font-weight: 300;
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
}

/* ==================== CATEGORIES ==================== */
.categories {
    background: var(--color-bg-warm);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.category-card {
    background: var(--color-white);
    border-radius: 3px;
    overflow: hidden;
    transition: transform 0.4s var(--ease-out-quart), box-shadow 0.4s ease;
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0,0,0,0.08);
}

.category-image {
    aspect-ratio: 4/3;
    background: linear-gradient(145deg, #f5f4f0, #e8e6e3);
    position: relative;
    overflow: hidden;
}

.category-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.02), transparent);
}

.category-content {
    padding: 1.5rem;
}

.category-name {
    font-family: var(--font-ui);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.category-name-jp {
    font-family: var(--font-japanese);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    letter-spacing: 0.05em;
}

.category-count {
    font-family: var(--font-ui);
    font-size: 0.65rem;
    color: var(--color-text-light);
    margin-top: 0.75rem;
}

/* ==================== DEMO FEATURE ==================== */
.demo-feature {
    background: var(--color-bg-dark);
    color: var(--color-white);
}

.demo-feature .section-label {
    color: var(--color-accent-warm);
}

.demo-feature .section-title {
    color: var(--color-white);
}

.demo-feature .section-title-jp {
    color: rgba(255,255,255,0.5);
}

.demo-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-top: 3rem;
}

.demo-stage {
    aspect-ratio: 4/3;
    background: #FFFFFF;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.5s var(--ease-smooth);
    position: relative;
}

.demo-product {
    width: 50%;
    height: 50%;
    background: linear-gradient(145deg, #C4A882, #8B7355);
    border-radius: 50%;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}

.demo-controls {
    padding: 2rem 0;
}

.demo-controls h3 {
    font-family: var(--font-ui);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.6);
    margin-bottom: 1.5rem;
}

.demo-swatches {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.demo-swatch {
    width: 56px;
    height: 56px;
    border-radius: 3px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color 0.3s ease, transform 0.3s ease;
    position: relative;
}

.demo-swatch:hover {
    transform: scale(1.1);
}

.demo-swatch.active {
    border-color: var(--color-accent-warm);
}

.demo-swatch::after {
    content: attr(data-label);
    position: absolute;
    bottom: -1.5rem;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-ui);
    font-size: 0.6rem;
    letter-spacing: 0.05em;
    color: rgba(255,255,255,0.5);
    white-space: nowrap;
}

.demo-explanation {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.demo-explanation p {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
    line-height: 1.8;
    max-width: 400px;
}

/* ==================== FEATURED PRODUCTS ==================== */
.featured-products {
    background: var(--color-white);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.product-card {
    background: var(--color-bg);
    border-radius: 3px;
    overflow: hidden;
    transition: box-shadow 0.4s ease;
}

.product-card:hover {
    box-shadow: 0 15px 50px rgba(0,0,0,0.08);
}

.product-image {
    aspect-ratio: 1;
    background: linear-gradient(145deg, #f5f4f0, #e8e6e3);
    position: relative;
}

.product-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    font-family: var(--font-ui);
    font-size: 0.6rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.35rem 0.75rem;
    background: var(--color-text);
    color: var(--color-white);
    border-radius: 2px;
}

.product-content {
    padding: 1.5rem;
}

.product-series {
    font-family: var(--font-ui);
    font-size: 0.6rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.product-name {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 400;
    margin-bottom: 0.25rem;
}

.product-name-jp {
    font-family: var(--font-japanese);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.product-price {
    font-family: var(--font-ui);
    font-size: 0.9rem;
    font-weight: 500;
}

.product-finishes {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border-light);
}

.finish-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
}

/* ==================== BRAND STORY ==================== */
.brand-story {
    background: var(--color-bg-warm);
}

.story-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.story-image {
    aspect-ratio: 4/5;
    background: linear-gradient(145deg, #e8e6e3, #d8d6d3);
    border-radius: 3px;
}

.story-content h3 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 300;
    margin-bottom: 0.5rem;
}

.story-content .jp-title {
    font-family: var(--font-japanese);
    font-size: 0.85rem;
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
    margin-bottom: 2rem;
}

.story-content p {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
    line-height: 2;
}

.story-stats {
    display: flex;
    gap: 3rem;
    margin-top: 2.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.stat {
    text-align: left;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--color-accent);
    line-height: 1;
}

.stat-label {
    font-family: var(--font-ui);
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-top: 0.5rem;
}

/* ==================== MOTION DESIGN TEC ==================== */
.motion-tec {
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-warm) 100%);
}

.motion-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.motion-card {
    background: var(--color-white);
    padding: 2.5rem 2rem;
    border-radius: 3px;
    text-align: center;
    transition: transform 0.4s var(--ease-out-quart);
}

.motion-card:hover {
    transform: translateY(-4px);
}

.motion-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 1.5rem;
    background: var(--color-bg-warm);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.motion-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-accent);
}

.motion-card h4 {
    font-family: var(--font-ui);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 0.25rem;
}

.motion-card .jp {
    font-family: var(--font-japanese);
    font-size: 0.7rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.motion-card p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ==================== JOURNAL ==================== */
.journal {
    background: var(--color-white);
}

.journal-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.journal-card {
    cursor: pointer;
}

.journal-card-image {
    aspect-ratio: 16/10;
    background: linear-gradient(145deg, #f0eeeb, #e8e6e3);
    border-radius: 3px;
    margin-bottom: 1.25rem;
    transition: transform 0.4s var(--ease-out-quart);
}

.journal-card:hover .journal-card-image {
    transform: scale(1.02);
}

.journal-card-category {
    font-family: var(--font-ui);
    font-size: 0.6rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.journal-card-title {
    font-family: var(--font-japanese);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.6;
}

/* ==================== FOOTER ==================== */
footer {
    background: var(--color-bg-dark);
    color: var(--color-white);
    padding: 5rem 6rem 2rem;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 4rem;
    padding-bottom: 4rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-logo {
    font-family: var(--font-ui);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    margin-bottom: 1.5rem;
}

.footer-desc {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
    line-height: 1.8;
    max-width: 280px;
}

.footer-col h4 {
    font-family: var(--font-ui);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.4);
    margin-bottom: 1.5rem;
}

.footer-col a {
    display: block;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.7);
    margin-bottom: 0.75rem;
    transition: color 0.3s ease;
}

.footer-col a:hover {
    color: var(--color-white);
}

.footer-bottom {
    padding-top: 2rem;
    text-align: center;
}

.footer-copy {
    font-family: var(--font-ui);
    font-size: 0.7rem;
    color: rgba(255,255,255,0.3);
    letter-spacing: 0.05em;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1200px) {
    .hero {
        padding: 0 4rem;
    }
    
    .hero-visual {
        right: 4rem;
        width: 40%;
    }
    
    section {
        padding: 5rem 4rem;
    }
    
    footer {
        padding: 4rem;
    }
}

@media (max-width: 992px) {
    .hero {
        flex-direction: column;
        justify-content: center;
        text-align: center;
        padding: 8rem 3rem 4rem;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-desc {
        margin: 0 auto 2.5rem;
    }
    
    .hero-visual {
        position: relative;
        right: auto;
        top: auto;
        transform: none;
        width: 80%;
        max-width: 400px;
        margin-top: 3rem;
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .demo-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .story-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .motion-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .journal-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-top {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    header {
        padding: 1rem 1.5rem;
    }
    
    nav {
        display: none;
    }
    
    .hero {
        padding: 6rem 1.5rem 3rem;
        min-height: auto;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    section {
        padding: 4rem 1.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .categories-grid,
    .products-grid,
    .motion-grid,
    .journal-grid {
        grid-template-columns: 1fr;
    }
    
    .story-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .footer-top {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    footer {
        padding: 3rem 1.5rem 1.5rem;
    }
}