/* THREADS Design System */
:root {
    /* Color Palette: Noir Editorial */
    --color-bg: #0F0F0F;
    --color-surface: #2A2A2A;
    --color-text: #E8E4DF;
    --color-text-muted: #A39E93;
    --color-accent: #C8B8A0;
    --color-accent-hover: #D4C5A9;
    
    /* Typography */
    --font-display: 'Clash Display', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 8rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

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

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-xl);
    background: rgba(15, 15, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(232, 228, 223, 0.1);
}

.nav-brand {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--color-text);
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
}

.nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
    position: relative;
}

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

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

.nav-links a:hover::after {
    width: 100%;
}

.nav-cart {
    position: relative;
    background: none;
    border: none;
    color: var(--color-text);
    cursor: pointer;
    padding: var(--space-xs);
    transition: color var(--transition-fast);
}

.nav-cart:hover {
    color: var(--color-accent);
}

.cart-count {
    position: absolute;
    top: -2px;
    right: -2px;
    width: 18px;
    height: 18px;
    background: var(--color-accent);
    color: var(--color-bg);
    font-size: 0.625rem;
    font-weight: 600;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: scale(0);
    transition: all var(--transition-base);
}

.cart-count.active {
    opacity: 1;
    transform: scale(1);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: calc(var(--space-3xl) + 80px) var(--space-xl) var(--space-3xl);
    gap: var(--space-xl);
    max-width: 1600px;
    margin: 0 auto;
}

.hero-content {
    animation: fadeInUp 1s ease;
}

.hero-tagline {
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 600;
    line-height: 0.95;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 400px;
    margin-bottom: var(--space-lg);
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

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

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-surface);
}

.btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    animation: fadeIn 1.2s ease 0.3s both;
}

.hero-image-container {
    position: relative;
    border-radius: 2px;
    overflow: hidden;
}

.hero-image {
    width: 100%;
    aspect-ratio: 4/5;
    object-fit: cover;
    filter: brightness(0.9) contrast(1.1);
}

.hero-badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: var(--color-accent);
    color: var(--color-bg);
    padding: var(--space-xs) var(--space-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1;
}

.badge-text {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
}

.badge-season {
    font-size: 0.625rem;
    opacity: 0.7;
}

/* Collection Section */
.collection {
    padding: var(--space-3xl) var(--space-xl);
    max-width: 1600px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
}

/* Collection Grid */
.collection-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.product-card {
    position: relative;
    background: var(--color-surface);
    border-radius: 2px;
    overflow: hidden;
    transition: transform var(--transition-base);
}

.product-card:hover {
    transform: translateY(-8px);
}

.product-card.featured {
    grid-column: span 2;
    grid-row: span 2;
}

@media (max-width: 768px) {
    .product-card.featured {
        grid-column: span 1;
        grid-row: span 1;
    }
}

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

.product-card.featured .product-image-wrapper {
    aspect-ratio: 1/1;
}

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

.product-card:hover .product-image {
    transform: scale(1.05);
}

.product-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 15, 15, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.product-card:hover .product-overlay {
    opacity: 1;
}

.btn-quick-add {
    background: var(--color-accent);
    color: var(--color-bg);
    border: none;
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    cursor: pointer;
    transform: translateY(20px);
    transition: all var(--transition-base);
}

.product-card:hover .btn-quick-add {
    transform: translateY(0);
}

.btn-quick-add:hover {
    background: var(--color-accent-hover);
}

.product-tag {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    background: var(--color-accent);
    color: var(--color-bg);
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.625rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.product-info {
    padding: var(--space-md);
}

.product-name {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.product-price {
    font-size: 1rem;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.product-colors {
    display: flex;
    gap: var(--space-xs);
}

.color-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: border-color var(--transition-fast);
}

.color-dot.active {
    border-color: var(--color-text);
}

/* About Section */
.about {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    padding: var(--space-3xl) var(--space-xl);
    max-width: 1600px;
    margin: 0 auto;
    align-items: center;
}

@media (max-width: 768px) {
    .about {
        grid-template-columns: 1fr;
    }
}

.about-visual {
    position: relative;
}

.about-image {
    width: 100%;
    aspect-ratio: 4/5;
    object-fit: cover;
    border-radius: 2px;
    filter: brightness(0.85) contrast(1.1);
}

.about-stat {
    position: absolute;
    bottom: var(--space-lg);
    right: var(--space-lg);
    background: var(--color-bg);
    padding: var(--space-md) var(--space-lg);
    border: 1px solid var(--color-surface);
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-accent);
    line-height: 1;
}

.stat-label {
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.about-content {
    max-width: 500px;
}

.about-content .section-title {
    margin-bottom: var(--space-lg);
}

.about-text {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.about-features {
    margin-top: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.feature {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.feature-icon {
    color: var(--color-accent);
    font-size: 0.75rem;
}

.feature-text {
    font-size: 0.875rem;
    color: var(--color-text);
}

/* Newsletter Section */
.newsletter {
    padding: var(--space-3xl) var(--space-xl);
    background: var(--color-surface);
    text-align: center;
}

.newsletter-content {
    max-width: 600px;
    margin: 0 auto;
}

.newsletter-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.newsletter-text {
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

.newsletter-form {
    display: flex;
    gap: var(--space-sm);
    max-width: 500px;
    margin: 0 auto;
}

@media (max-width: 480px) {
    .newsletter-form {
        flex-direction: column;
    }
}

.newsletter-input {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg);
    border: 1px solid rgba(232, 228, 223, 0.2);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
    transition: border-color var(--transition-fast);
}

.newsletter-input:focus {
    border-color: var(--color-accent);
}

.newsletter-input::placeholder {
    color: var(--color-text-muted);
}

/* Footer */
.footer {
    padding: var(--space-2xl) var(--space-xl) var(--space-lg);
    border-top: 1px solid var(--color-surface);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-xl);
    max-width: 1600px;
    margin: 0 auto var(--space-2xl);
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: var(--space-sm);
}

.footer-tagline {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.footer-links h4 {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.footer-links a {
    display: block;
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-bottom: var(--space-xs);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-surface);
    color: var(--color-text-muted);
    font-size: 0.875rem;
    max-width: 1600px;
    margin: 0 auto;
}

/* Cart Drawer */
.cart-drawer {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    max-width: 100%;
    height: 100vh;
    background: var(--color-bg);
    border-left: 1px solid var(--color-surface);
    z-index: 200;
    display: flex;
    flex-direction: column;
    transition: right var(--transition-base);
}

.cart-drawer.open {
    right: 0;
}

.cart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-surface);
}

.cart-header h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
}

.cart-close {
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.cart-close:hover {
    color: var(--color-accent);
}

.cart-items {
    flex: 1;
    padding: var(--space-md);
    overflow-y: auto;
}

.cart-empty {
    text-align: center;
    color: var(--color-text-muted);
    padding: var(--space-xl) 0;
}

.cart-footer {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--color-surface);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-md);
    font-size: 1.125rem;
    font-weight: 600;
}

.total-amount {
    color: var(--color-accent);
}

.btn-checkout {
    width: 100%;
}

.cart-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 150;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.cart-overlay.open {
    opacity: 1;
    visibility: visible;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll Reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: calc(var(--space-2xl) + 80px);
    }
    
    .hero-content {
        order: 2;
    }
    
    .hero-visual {
        order: 1;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav {
        padding: var(--space-md);
    }
    
    .nav-links {
        display: none;
    }
    
    .hero {
        padding: calc(var(--space-xl) + 80px) var(--space-md) var(--space-xl);
    }
    
    .collection,
    .about,
    .newsletter {
        padding: var(--space-xl) var(--space-md);
    }
}