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

:root {
    --bg-primary: #FAF9F6; /* Washi paper */
    --bg-secondary: #F0EFEA;
    --text-primary: #2C2C2C; /* Sumi ink */
    --text-secondary: #5A5A5A;
    --accent-earth: #8C7B6D;
    --accent-wood: #A68A6D;
    --accent-leaf: #798471;
    --border-color: #E5E0D8;
    
    --font-heading: 'Shippori Mincho', serif;
    --font-body: 'Noto Sans JP', sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    
    --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 400;
    line-height: 1.4;
    color: var(--text-primary);
}

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

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

/* Typography Scale */
.h-xl { font-size: clamp(2.5rem, 5vw, 4.5rem); letter-spacing: 0.05em; }
.h-lg { font-size: clamp(2rem, 4vw, 3rem); letter-spacing: 0.05em; }
.h-md { font-size: clamp(1.5rem, 3vw, 2rem); }
.h-sm { font-size: 1.25rem; }

.text-lead { font-size: clamp(1rem, 2vw, 1.25rem); color: var(--text-secondary); line-height: 2; }
.text-sm { font-size: 0.875rem; color: var(--text-secondary); }

/* Utility Classes */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-padding {
    padding: var(--spacing-xl) 0;
}

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

/* Vertical Text (Japanese traditional) */
.vertical-text {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-family: var(--font-heading);
    letter-spacing: 0.2em;
    line-height: 2;
}

/* Navigation */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    transition: background-color var(--transition-fast), padding var(--transition-fast);
}

.site-header.scrolled {
    background-color: rgba(250, 249, 246, 0.95);
    backdrop-filter: blur(10px);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    letter-spacing: 0.1em;
    font-weight: 500;
}

.desktop-nav ul {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

.desktop-nav a {
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    position: relative;
    padding-bottom: 4px;
}

.desktop-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--text-primary);
    transition: width var(--transition-fast);
}

.desktop-nav a:hover::after,
.desktop-nav a.active::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 30px;
    height: 20px;
    position: relative;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 1px;
    background-color: var(--text-primary);
    position: absolute;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.mobile-menu-btn span:nth-child(1) { top: 0; }
.mobile-menu-btn span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.mobile-menu-btn span:nth-child(3) { bottom: 0; }

.mobile-menu-btn.active span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: translateY(-10px) rotate(-45deg); }

.mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--bg-primary);
    z-index: 999;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
}

.mobile-nav.active {
    opacity: 1;
    pointer-events: auto;
}

.mobile-nav ul {
    list-style: none;
    text-align: center;
}

.mobile-nav li {
    margin-bottom: var(--spacing-md);
    transform: translateY(20px);
    opacity: 0;
    transition: transform 0.5s ease, opacity 0.5s ease;
}

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

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

/* Animations */
.fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s ease-out, transform 1s ease-out;
}

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

/* Hero Section */
.hero {
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
}

.hero-content {
    max-width: 800px;
    z-index: 2;
    position: relative;
}

.hero-subtitle {
    display: block;
    font-size: 1rem;
    letter-spacing: 0.2em;
    margin-bottom: var(--spacing-sm);
    color: var(--accent-earth);
}

.hero-image {
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}

/* Image reveal effect */
.img-reveal {
    overflow: hidden;
    position: relative;
}

.img-reveal img {
    transform: scale(1.1);
    transition: transform 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Split Layout */
.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.split-layout.reverse .split-content {
    order: -1;
}

/* Philosophy Section */
.philosophy {
    background-color: var(--bg-secondary);
}

.philosophy-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
}

.philosophy-title {
    position: sticky;
    top: 120px;
}

/* Gallery Grid */
.masonry-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--spacing-md);
}

.masonry-item {
    position: relative;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.masonry-item:hover .masonry-overlay {
    opacity: 1;
}

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

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

.masonry-overlay {
    position: absolute;
    inset: 0;
    background: rgba(44, 44, 44, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.masonry-overlay span {
    color: var(--bg-primary);
    font-family: var(--font-heading);
    font-size: 1.5rem;
    letter-spacing: 0.1em;
}

.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

/* Details Section */
.room-details {
    padding-left: var(--spacing-lg);
    border-left: 1px solid var(--border-color);
}

.detail-item {
    margin-bottom: var(--spacing-md);
}

.detail-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-earth);
    margin-bottom: 0.25rem;
    display: block;
}

/* Footer */
.site-footer {
    background-color: var(--text-primary);
    color: var(--bg-primary);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

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

.footer-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    display: block;
    color: var(--bg-primary);
}

.footer-links ul {
    list-style: none;
}

.footer-links a {
    color: var(--bg-primary);
    opacity: 0.7;
    font-size: 0.9rem;
}

.footer-links a:hover {
    opacity: 1;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: var(--spacing-md);
    text-align: center;
    font-size: 0.8rem;
    opacity: 0.6;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-image { width: 50%; }
    .split-layout { gap: var(--spacing-md); }
}

@media (max-width: 768px) {
    .desktop-nav { display: none; }
    .mobile-menu-btn { display: block; }
    
    .hero {
        flex-direction: column;
        justify-content: center;
        text-align: center;
        padding-top: 0;
    }
    
    .hero-image {
        position: relative;
        width: 100%;
        height: 50vh;
        margin-top: var(--spacing-md);
    }
    
    .split-layout {
        grid-template-columns: 1fr;
    }
    
    .split-layout.reverse .split-content {
        order: 0;
    }
    
    .philosophy-grid {
        grid-template-columns: 1fr;
    }
    
    .philosophy-title {
        position: static;
        margin-bottom: var(--spacing-md);
    }
    
    .col-4, .col-6, .col-8 {
        grid-column: span 12;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .room-details {
        padding-left: 0;
        border-left: none;
        border-top: 1px solid var(--border-color);
        padding-top: var(--spacing-md);
        margin-top: var(--spacing-md);
    }
}