/* ==========================================
   Variables
========================================== */
:root {
    --color-primary: #8B7355;
    --color-secondary: #D4A574;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-bg: #FFFFFF;
    --color-bg-light: #FAF8F5;
    --color-border: #E5E5E5;

    --font-en: 'Cormorant Garamond', serif;
    --font-jp: 'Noto Sans JP', sans-serif;

    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 40px;
    --spacing-xl: 60px;
    --spacing-xxl: 80px;

    --transition: 0.3s ease;
}

/* ==========================================
   Common Styles
========================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-title {
    font-family: var(--font-en);
    font-size: 2.5rem;
    font-weight: 400;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    letter-spacing: 0.1em;
}

.btn-more {
    display: inline-block;
    padding: 12px 40px;
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    transition: var(--transition);
    margin-top: var(--spacing-lg);
}

.btn-more:hover {
    background: var(--color-primary);
    color: white;
    opacity: 1;
}

/* ==========================================
   Header
========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-logo a {
    font-family: var(--font-en);
    font-size: 1.5rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    color: var(--color-primary);
}

.header-nav {
    display: none;
}

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

.nav-list a {
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    font-weight: 500;
}

/* Hamburger Menu */
.hamburger {
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: 30px;
    height: 24px;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

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

.hamburger.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

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

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

.mobile-nav li {
    margin-bottom: var(--spacing-lg);
}

.mobile-nav a {
    font-size: 1.25rem;
    letter-spacing: 0.1em;
    font-weight: 500;
}

/* ==========================================
   Hero Video Section
========================================== */
.hero-video {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

.hero-video-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.hero-video-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
}

.hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 10;
    width: 100%;
    padding: 0 var(--spacing-md);
}

.hero-title {
    font-family: var(--font-en);
    font-size: 3.5rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1rem;
    letter-spacing: 0.15em;
    margin-bottom: var(--spacing-xl);
    font-weight: 300;
}

.hero-btn {
    display: inline-block;
    padding: 14px 50px;
    border: 1px solid white;
    color: white;
    font-size: 0.875rem;
    letter-spacing: 0.15em;
    transition: var(--transition);
}

.hero-btn:hover {
    background: white;
    color: var(--color-text);
    opacity: 1;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    text-align: center;
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    z-index: 10;
}

.scroll-line {
    width: 1px;
    height: 50px;
    background: white;
    margin: 10px auto 0;
    animation: scrollAnimation 1.5s ease-in-out infinite;
}

@keyframes scrollAnimation {
    0%, 100% {
        opacity: 0;
        height: 0;
    }
    50% {
        opacity: 1;
        height: 50px;
    }
}

/* ==========================================
   News Section
========================================== */
.news-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-bg);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.news-item {
    border-bottom: 1px solid var(--color-border);
    padding-bottom: var(--spacing-md);
}

.news-date {
    font-size: 0.875rem;
    color: var(--color-text-light);
    letter-spacing: 0.05em;
}

.news-title {
    font-size: 1.125rem;
    font-weight: 500;
    margin: var(--spacing-xs) 0;
}

.news-excerpt {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
}

.news-link {
    font-size: 0.75rem;
    color: var(--color-primary);
    letter-spacing: 0.1em;
    border-bottom: 1px solid var(--color-primary);
    padding-bottom: 2px;
}

.news-section .btn-more {
    display: block;
    text-align: center;
    max-width: 300px;
    margin: var(--spacing-xl) auto 0;
}

/* ==========================================
   Instagram Section
========================================== */
.instagram-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-bg-light);
}

.instagram-account {
    text-align: center;
    font-size: 1rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.instagram-feed {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.instagram-item {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
}

.instagram-item:hover {
    transform: scale(0.98);
}

.instagram-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.btn-instagram {
    display: block;
    text-align: center;
    max-width: 300px;
    margin: 0 auto;
    padding: 12px 40px;
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    transition: var(--transition);
}

.btn-instagram:hover {
    background: var(--color-primary);
    color: white;
    opacity: 1;
}

/* ==========================================
   Concept Section
========================================== */
.concept-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-bg);
}

.concept-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.concept-image {
    width: 100%;
}

.concept-image img {
    width: 100%;
    height: auto;
}

.concept-text {
    width: 100%;
}

.concept-text .section-title {
    text-align: left;
    margin-bottom: var(--spacing-md);
}

.concept-description {
    font-size: 1rem;
    line-height: 2;
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
}

/* ==========================================
   Featured Collection Section
========================================== */
.featured-collection {
    padding: var(--spacing-xxl) 0;
    background: var(--color-bg-light);
}

.collection-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.collection-item {
    position: relative;
    overflow: hidden;
}

.collection-image {
    position: relative;
    aspect-ratio: 3/4;
    overflow: hidden;
}

.collection-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.collection-item-title {
    font-size: 1rem;
    font-weight: 400;
    text-align: center;
    margin-top: var(--spacing-sm);
    letter-spacing: 0.05em;
}

.featured-collection .btn-more {
    display: block;
    text-align: center;
    max-width: 300px;
    margin: var(--spacing-xl) auto 0;
}

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

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.footer-column h4 {
    font-family: var(--font-en);
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-column a {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer-logo {
    font-family: var(--font-en);
    font-size: 1.5rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    margin-bottom: var(--spacing-sm);
}

.footer-copyright {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.6);
    margin: 0 var(--spacing-xs);
}

/* ==========================================
   Floating Button
========================================== */
.floating-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 900;
}

.floating-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--color-primary);
    color: white;
    border-radius: 50px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: var(--transition);
}

.floating-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
    opacity: 1;
}

.floating-icon {
    font-size: 1.25rem;
}

.floating-text {
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
}

/* ==========================================
   Responsive Design - Tablet
========================================== */
@media (min-width: 768px) {
    .section-title {
        font-size: 3rem;
    }

    .hero-title {
        font-size: 4.5rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .instagram-feed {
        grid-template-columns: repeat(3, 1fr);
    }

    .collection-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .concept-content {
        flex-direction: row;
        align-items: center;
        gap: var(--spacing-xl);
    }

    .concept-image {
        width: 50%;
    }

    .concept-text {
        width: 50%;
    }

    .footer-nav {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ==========================================
   Responsive Design - Desktop
========================================== */
@media (min-width: 1024px) {
    .hamburger {
        display: none;
    }

    .header-nav {
        display: block;
    }

    .mobile-menu {
        display: none;
    }

    .section-title {
        font-size: 3.5rem;
    }

    .hero-title {
        font-size: 5rem;
    }

    .news-list {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-lg);
    }

    .instagram-feed {
        grid-template-columns: repeat(6, 1fr);
    }

    .collection-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-lg);
    }
}