/* ===== Variables ===== */
:root {
    /* Colors */
    --color-black: #000000;
    --color-white: #FFFFFF;
    --color-gray-light: #F5F5F5;
    --color-gray-medium: #E0E0E0;
    --color-gray-dark: #333333;
    
    /* Typography */
    --font-serif: 'Noto Serif JP', serif;
    --font-sans: 'Noto Sans JP', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.8rem;
    --spacing-sm: 1.6rem;
    --spacing-md: 2.4rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s ease;
    --transition-slow: 0.6s ease;
}

/* ===== Base Styles ===== */
body {
    font-family: var(--font-sans);
    font-size: 1.6rem;
    font-weight: 300;
    color: var(--color-black);
    background-color: var(--color-white);
    overflow-x: hidden;
}

.container {
    max-width: 120rem;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 400;
    line-height: 1.2;
}

h1 {
    font-size: clamp(4.8rem, 8vw, 7.2rem);
}

h2 {
    font-size: clamp(3.2rem, 6vw, 4.8rem);
}

h3 {
    font-size: clamp(2.4rem, 4vw, 3.2rem);
}

p {
    line-height: 1.8;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all var(--transition-medium);
}

.navbar.scrolled {
    background-color: var(--color-white);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    max-width: 140rem;
    margin: 0 auto;
}

.nav-logo {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    font-size: 1.4rem;
    font-weight: 400;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-black);
    transition: width var(--transition-medium);
}

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

/* Store Link Special Styling */
.nav-link.store-link {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: 0.8rem 2rem;
    margin-left: var(--spacing-md);
    transition: all var(--transition-fast);
}

.nav-link.store-link:hover {
    background-color: var(--color-gray-dark);
    transform: translateY(-0.2rem);
}

.nav-link.store-link::after {
    display: none;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 0.4rem;
    width: 3rem;
    height: 2.4rem;
    position: relative;
}

.nav-toggle span {
    width: 100%;
    height: 1px;
    background-color: var(--color-black);
    transition: all var(--transition-fast);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    width: 100%;
    height: auto;
    overflow: hidden;
    background-color: var(--color-gray-light);
    margin-top: 7rem; /* Push hero section down below navbar */
}

.hero-image {
    width: 100%;
    height: auto;
    display: block;
}

.hero-image img {
    width: 100%;
    height: auto;
    display: block;
}

.hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--color-white);
    z-index: 10;
}

.hero-title {
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
    font-size: 2rem;
    font-weight: 300;
    letter-spacing: 0.2em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    width: 3rem;
    height: 5rem;
    border: 1px solid var(--color-white);
    border-radius: 2rem;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 1rem;
}

.scroll-indicator span {
    width: 0.4rem;
    height: 1rem;
    background-color: var(--color-white);
    border-radius: 0.2rem;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% {
        opacity: 0;
        transform: translateY(0);
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translateY(2rem);
    }
}

/* ===== Introduction Section ===== */
.introduction {
    padding: var(--spacing-xl) 0;
    text-align: center;
}

/* Introduction within overview section */
.introduction-overview {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    background-color: var(--color-gray-light);
    border-radius: 0.8rem;
    margin: var(--spacing-xl) 0;
}

.intro-text {
    font-size: 1.8rem;
    line-height: 2;
    margin-bottom: var(--spacing-lg);
    max-width: 80rem;
    margin-left: auto;
    margin-right: auto;
}

.intro-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 1.2rem 3.6rem;
    font-size: 1.4rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    border: 1px solid var(--color-black);
    transition: all var(--transition-fast);
}

.btn-primary {
    background-color: var(--color-black);
    color: var(--color-white);
}

.btn-primary:hover {
    background-color: var(--color-white);
    color: var(--color-black);
}

.btn-secondary {
    background-color: var(--color-white);
    color: var(--color-black);
}

.btn-secondary:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

/* ===== Featured Collections ===== */
.featured-collections {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-gray-light);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.collections-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(30rem, 1fr));
    gap: var(--spacing-lg);
}

.collection-item {
    position: relative;
    overflow: hidden;
    background-color: var(--color-white);
}

.collection-image {
    position: relative;
    height: 50rem;
    overflow: hidden;
}

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

.collection-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-lg);
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    color: var(--color-white);
    transform: translateY(100%);
    transition: transform var(--transition-medium);
}

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

.collection-item:hover .collection-overlay {
    transform: translateY(0);
}

.collection-overlay h3 {
    font-size: 2.4rem;
    margin-bottom: var(--spacing-xs);
}

.collection-overlay p {
    font-size: 1.4rem;
    font-weight: 300;
}

/* ===== Footer ===== */
.footer {
    padding: var(--spacing-lg) 0;
    background-color: var(--color-black);
    color: var(--color-white);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.copyright {
    font-size: 1.2rem;
    font-weight: 300;
    letter-spacing: 0.05em;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-links a {
    font-size: 2rem;
    transition: transform var(--transition-fast);
}

.social-links a:hover {
    transform: translateY(-0.2rem);
}

/* ===== Responsive Design ===== */
/* Tablet and touch devices */
@media (max-width: 1024px) {
    /* Make collection overlay visible on touch devices */
    .collection-overlay {
        transform: translateY(0);
        background: linear-gradient(to top, rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0.2));
    }
}

@media (max-width: 768px) {
    /* Remove glassmorphism from navbar on mobile */
    .navbar {
        background-color: var(--color-white) !important;
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
    }
    
    /* Make hero section taller on mobile */
    .hero {
        height: 50vh; /* 10% taller than viewport */
    }
    
    .hero-image {
        height: 100%;
    }
    
    .hero-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 7rem;
        flex-direction: column;
        background-color: var(--color-white);
        width: 100%;
        text-align: center;
        transition: left var(--transition-medium);
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: var(--spacing-lg) 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }
    
    .nav-link.store-link {
        margin-left: 0;
        margin-top: var(--spacing-md);
        display: inline-block;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: translateY(0.8rem) rotate(45deg);
    }

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

    .nav-toggle.active span:nth-child(3) {
        transform: translateY(-0.8rem) rotate(-45deg);
    }

    .hero-content {
        padding: 0 var(--spacing-md);
    }

    .collections-grid {
        grid-template-columns: 1fr;
    }
    
    /* Make collection overlay visible on mobile */
    .collection-overlay {
        transform: translateY(0);
        background: linear-gradient(to top, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.3));
    }

    .footer-content {
        justify-content: center;
        text-align: center;
    }
}

/* ===== Loading Animation ===== */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-white);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-spinner {
    width: 4rem;
    height: 4rem;
    border: 1px solid var(--color-gray-medium);
    border-top-color: var(--color-black);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ===== Section Overviews ===== */
.section-overviews {
    padding: var(--spacing-xl) 0;
}

.overview-section {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-gray-medium);
    text-align: center;
}

.overview-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.section-description {
    font-size: 1.8rem;
    line-height: 1.8;
    color: var(--color-gray-dark);
    margin: var(--spacing-md) auto var(--spacing-lg);
    max-width: 80rem;
}

/* Featured Projects */
.featured-projects {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(30rem, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.project-item {
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-medium);
}

.project-item:hover {
    transform: translateY(-0.5rem);
}

.project-image {
    width: 100%;
    height: 25rem;
    overflow: hidden;
    background-color: var(--color-gray-light);
    margin-bottom: var(--spacing-md);
}

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

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

.project-info {
    text-align: left;
}

.project-info h3 {
    font-size: 2.4rem;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-serif);
}

.project-info p {
    font-size: 1.6rem;
    line-height: 1.6;
    color: var(--color-gray-dark);
}

/* Profile Picture */
.profile-picture {
    width: 25rem;
    height: 25rem;
    margin: 0 auto var(--spacing-lg);
    overflow: hidden;
    border-radius: 50%;
    background-color: var(--color-gray-light);
}

.profile-picture img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 30%;
}

.profile-name {
    font-size: 2rem;
    font-weight: 400;
    color: var(--color-gray-dark);
    margin-top: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.1em;
}

/* About Highlights */
.about-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(25rem, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.highlight-item {
    text-align: center;
    padding: var(--spacing-md);
}

.highlight-item i {
    font-size: 4rem;
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-md);
}

.highlight-item h4 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-serif);
}

.highlight-item p {
    font-size: 1.6rem;
    color: var(--color-gray-dark);
}

/* Contact Info Preview */
.contact-info-preview {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.contact-item i {
    font-size: 2rem;
    color: var(--color-gray-dark);
}

.contact-item p {
    font-size: 1.8rem;
    margin: 0;
}

/* Responsive for Section Overviews */
@media (max-width: 768px) {
    .featured-projects {
        grid-template-columns: 1fr;
    }
    
    .about-highlights {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .contact-info-preview {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .section-description {
        font-size: 1.6rem;
    }
    
    .project-image {
        height: 20rem;
    }
}