@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&family=Shippori+Mincho:wght@400;500;600;700&display=swap');

:root {
    /* Colors */
    --color-bg: #FCFBF9; /* Washi white */
    --color-surface: #F2EFE9; /* Tatami sand */
    --color-text: #2C2C2C; /* Sumi black */
    --color-text-light: #595959;
    --color-accent: #8A7B66; /* Aged wood */
    --color-accent-hover: #6E6251;
    --color-highlight: #4A5D4E; /* Deep matcha */
    --color-border: #DEDAD2;
    
    /* Typography */
    --font-heading: 'Shippori Mincho', serif;
    --font-body: 'Noto Sans JP', sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;
    
    /* Borders & Shadows */
    --radius-sm: 2px;
    --radius-md: 4px;
    --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.03);
    
    /* Transitions */
    --transition-slow: 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
    --transition-base: 0.4s ease;
}

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

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.9;
    font-weight: 300;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 500;
    line-height: 1.4;
    color: var(--color-text);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); letter-spacing: 0.05em; }
h2 { font-size: clamp(2rem, 4vw, 3rem); letter-spacing: 0.02em; }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
p { font-size: 1rem; color: var(--color-text-light); margin-bottom: 1.5rem; }

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-base);
}
a:hover { color: var(--color-text); }

/* Layout & Containers */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.section {
    padding: var(--space-xl) 0;
    position: relative;
}

/* Utilities */
.vert-text {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-family: var(--font-heading);
    letter-spacing: 0.2em;
    color: var(--color-border);
    font-size: 3rem;
    position: absolute;
    top: var(--space-xl);
    left: var(--space-md);
    z-index: -1;
    user-select: none;
}

/* Header & Nav */
.site-header {
    position: fixed;
    top: 0; left: 0; width: 100%;
    background-color: rgba(252, 251, 249, 0.95);
    backdrop-filter: blur(8px);
    z-index: 1000;
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-sm) 0;
    transition: transform var(--transition-base);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--color-text);
    letter-spacing: 0.1em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-md);
}

.nav-menu a {
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    color: var(--color-text-light);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-accent);
    transition: width var(--transition-base);
}
.nav-menu a:hover::after, .nav-menu a.active::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 24px;
    height: 16px;
    position: relative;
    z-index: 1001;
}

.hamburger, .hamburger::before, .hamburger::after {
    display: block;
    width: 100%;
    height: 1px;
    background-color: var(--color-text);
    position: absolute;
    transition: transform var(--transition-base), opacity var(--transition-base);
}
.hamburger { top: 7px; }
.hamburger::before { content: ''; top: -7px; }
.hamburger::after { content: ''; top: 7px; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    background-color: transparent;
    border: 1px solid var(--color-text);
    color: var(--color-text);
    font-family: var(--font-heading);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}
.btn::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-color: var(--color-text);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-base);
    z-index: -1;
}
.btn:hover { color: var(--color-bg); }
.btn:hover::before {
    transform: scaleX(1);
    transform-origin: left;
}

.btn-primary {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-bg);
}
.btn-primary::before { background-color: var(--color-accent-hover); }

/* Hero Section */
.hero {
    min-height: 100vh;
    padding-top: 100px;
    display: flex;
    align-items: center;
    position: relative;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    align-items: center;
}

.hero-content {
    position: relative;
    z-index: 2;
    padding-right: var(--space-md);
}

.hero-content h1 {
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.1rem;
    margin-bottom: var(--space-lg);
    max-width: 500px;
}

.hero-image {
    position: relative;
    height: 80vh;
    width: 100%;
    overflow: hidden;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.05);
    transition: transform 10s ease-out;
}

.hero.loaded .hero-image img { transform: scale(1); }

.hero-badge {
    position: absolute;
    bottom: -2rem;
    left: -2rem;
    background-color: var(--color-bg);
    padding: var(--space-md);
    border: 1px solid var(--color-border);
    font-family: var(--font-heading);
    writing-mode: vertical-rl;
    font-size: 1.2rem;
    letter-spacing: 0.1em;
}

/* Feature Grid (Tatami Layout) */
.tatami-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 1px;
    background-color: var(--color-border);
    border: 1px solid var(--color-border);
    margin: var(--space-xl) 0;
}

.tatami-item {
    background-color: var(--color-bg);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: background-color var(--transition-base);
}

.tatami-item:hover { background-color: var(--color-surface); }
.tatami-item h3 { margin-bottom: var(--space-sm); font-size: 1.8rem; }
.tatami-item.wide { grid-column: span 8; }
.tatami-item.tall { grid-column: span 4; grid-row: span 2; }
.tatami-item.square { grid-column: span 4; aspect-ratio: 1; }

.tatami-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    padding: 0;
}

/* Story Section / Asymmetric Image Text */
.story-section {
    display: grid;
    grid-template-columns: 5fr 7fr;
    gap: var(--space-xl);
    align-items: center;
}

.story-section.reverse {
    grid-template-columns: 7fr 5fr;
}
.story-section.reverse .story-image { order: 2; }
.story-section.reverse .story-text { order: 1; }

.story-image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-subtle);
}

.story-text h2 { margin-bottom: var(--space-md); position: relative; display: inline-block; }
.story-text h2::after {
    content: '';
    position: absolute;
    left: 0; bottom: -10px;
    width: 40px; height: 1px;
    background-color: var(--color-accent);
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-subtle);
}

.card-img-wrap {
    height: 250px;
    overflow: hidden;
}

.card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}
.card:hover img { transform: scale(1.05); }

.card-content {
    padding: var(--space-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.card h3 { margin-bottom: var(--space-sm); font-size: 1.4rem; }
.card p { margin-bottom: var(--space-md); flex-grow: 1; }
.card .read-more {
    margin-top: auto;
    font-size: 0.9rem;
    font-family: var(--font-heading);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* Footer */
.site-footer {
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--space-xl) 0 var(--space-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.footer-brand h2 { font-size: 1.5rem; margin-bottom: var(--space-sm); }
.footer-brand p { font-size: 0.9rem; max-width: 300px; }

.footer-col h4 {
    font-size: 1.1rem;
    margin-bottom: var(--space-md);
    position: relative;
    display: inline-block;
}

.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: var(--space-sm); }
.footer-col a { color: var(--color-text-light); font-size: 0.9rem; }
.footer-col a:hover { color: var(--color-accent); }

.footer-bottom {
    text-align: center;
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
    font-size: 0.8rem;
    color: var(--color-text-light);
}

/* Page Header (for inner pages) */
.page-header {
    padding: calc(100px + var(--space-xl)) 0 var(--space-lg);
    text-align: center;
    background-color: var(--color-surface);
    position: relative;
}
.page-header h1 { margin-bottom: var(--space-sm); }
.page-header p { max-width: 600px; margin: 0 auto; font-size: 1.1rem; }

/* Article / Typography content */
.article-content {
    max-width: 800px;
    margin: 0 auto;
}
.article-content h2 { margin: var(--space-lg) 0 var(--space-md); }
.article-content h3 { margin: var(--space-md) 0 var(--space-sm); }
.article-content img { width: 100%; border-radius: var(--radius-sm); margin: var(--space-md) 0; }
.article-content blockquote {
    border-left: 2px solid var(--color-accent);
    padding-left: var(--space-md);
    margin: var(--space-md) 0;
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-style: italic;
    color: var(--color-text);
}

/* Animations */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 1024px) {
    .tatami-grid { display: flex; flex-direction: column; gap: 0; border: none; background: transparent; }
    .tatami-item { border: 1px solid var(--color-border); margin-bottom: var(--space-md); }
    .tatami-image { display: none; } /* Hide large grid images on mobile, rely on cards */
    
    .story-section, .story-section.reverse { grid-template-columns: 1fr; gap: var(--space-md); }
    .story-section.reverse .story-image { order: 1; }
    .story-section.reverse .story-text { order: 2; }
}

@media (max-width: 768px) {
    :root {
        --space-md: 1.5rem;
        --space-lg: 3rem;
        --space-xl: 4rem;
    }
    
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.8rem; }
    
    .menu-toggle { display: block; }
    
    .nav-menu {
        position: fixed;
        top: 0; right: -100%;
        width: 100%; height: 100vh;
        background-color: var(--color-bg);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: right var(--transition-base);
        z-index: 1000;
        gap: var(--space-lg);
    }
    
    .nav-menu.active { right: 0; }
    .nav-menu a { font-size: 1.5rem; }
    
    .menu-toggle { z-index: 1001; }
    .menu-toggle.active .hamburger { background: transparent; }
    .menu-toggle.active .hamburger::before { transform: rotate(45deg); top: 0; }
    .menu-toggle.active .hamburger::after { transform: rotate(-45deg); top: 0; }
    
    .hero { min-height: 80vh; padding-top: 80px; }
    .hero-grid { grid-template-columns: 1fr; }
    .hero-image { height: 50vh; margin-top: var(--space-md); }
    .hero-badge { display: none; }
    
    .footer-grid { grid-template-columns: 1fr; gap: var(--space-md); text-align: center; }
    .footer-col h4::after { left: 50%; transform: translateX(-50%); }
    .footer-brand p { margin: 0 auto; }
}