/* ============================================
   AURA - Premium Clothing Brand
   Design System & Styles
   ============================================ */

/* CSS Variables - Monochrome Luxe Palette */
:root {
    /* Colors */
    --color-bg: #FAFAFA;
    --color-bg-alt: #F5F5F5;
    --color-surface: #FFFFFF;
    --color-text: #1A1A1A;
    --color-text-secondary: #666666;
    --color-text-muted: #999999;
    --color-accent: #B8860B;
    --color-border: #E0E0E0;
    --color-border-light: #EEEEEE;
    
    /* Typography */
    --font-display: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --text-4xl: 2.5rem;
    --text-5xl: 3.5rem;
    --text-6xl: 5rem;
    --text-7xl: 7rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    --transition-slower: 800ms ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    
    /* Border Radius */
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 8px;
}

/* 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);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 500;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-6) var(--space-8);
    transition: all var(--transition-base);
}

.nav.scrolled {
    background: rgba(250, 250, 250, 0.95);
    backdrop-filter: blur(20px);
    padding: var(--space-4) var(--space-8);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1600px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--color-text);
}

.nav-links {
    display: flex;
    gap: var(--space-10);
}

.nav-link {
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-text);
    position: relative;
    padding: var(--space-2) 0;
}

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

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

/* Mobile Navigation */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: var(--space-2);
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 1px;
    background: var(--color-text);
    transition: all var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    z-index: 999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

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

.mobile-link {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 500;
    color: var(--color-text);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-image {
    position: absolute;
    inset: 0;
    background-image: url('https://images.unsplash.com/photo-1490481651871-ab68de25d43d?w=1920&q=80');
    background-size: cover;
    background-position: center;
    transform: scale(1.1);
    animation: heroZoom 20s ease-out forwards;
}

@keyframes heroZoom {
    to {
        transform: scale(1);
    }
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(250, 250, 250, 0.3) 0%,
        rgba(250, 250, 250, 0.1) 50%,
        rgba(250, 250, 250, 0.8) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    padding: var(--space-8);
}

.hero-subtitle {
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
}

.hero-title {
    font-size: clamp(var(--text-5xl), 12vw, var(--text-7xl));
    font-weight: 400;
    line-height: 0.95;
    margin-bottom: var(--space-8);
}

.hero-title span {
    display: block;
}

.hero-title span:nth-child(2) {
    font-style: italic;
    color: var(--color-accent);
}

.hero-description {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto var(--space-10);
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: var(--space-10);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-xs);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-text-muted), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% {
        opacity: 0.3;
        transform: scaleY(0.8);
    }
    50% {
        opacity: 1;
        transform: scaleY(1);
    }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: all var(--transition-base);
    min-width: 180px;
}

.btn-primary {
    background: var(--color-text);
    color: var(--color-bg);
    border: 1px solid var(--color-text);
}

.btn-primary:hover {
    background: transparent;
    color: var(--color-text);
}

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

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

/* ============================================
   Section Styles
   ============================================ */
.section-header {
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--space-32) var(--space-8) var(--space-16);
}

.section-header.centered {
    text-align: center;
}

.section-label {
    display: block;
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-4);
}

.section-title {
    font-size: clamp(var(--text-3xl), 5vw, var(--text-5xl));
    font-weight: 400;
    line-height: 1.1;
}

/* ============================================
   Collections Section
   ============================================ */
.collections {
    background: var(--color-bg);
}

.collections-grid {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 var(--space-8) var(--space-32);
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--space-6);
}

.collection-card {
    position: relative;
    background: var(--color-surface);
    overflow: hidden;
    cursor: pointer;
}

.collection-featured {
    grid-column: span 7;
    grid-row: span 2;
    min-height: 700px;
}

.collection-card:not(.collection-featured) {
    grid-column: span 5;
    min-height: 340px;
}

.collection-image {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transition: transform var(--transition-slow);
}

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

.collection-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-8);
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    color: white;
}

.collection-tag {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    padding: var(--space-1) var(--space-3);
    background: var(--color-accent);
    margin-bottom: var(--space-3);
}

.collection-title {
    font-size: var(--text-2xl);
    font-weight: 500;
    margin-bottom: var(--space-2);
}

.collection-featured .collection-title {
    font-size: var(--text-4xl);
}

.collection-description {
    font-size: var(--text-sm);
    opacity: 0.9;
    max-width: 400px;
    margin-bottom: var(--space-4);
    line-height: 1.6;
}

.collection-link {
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.1em;
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    transition: gap var(--transition-base);
}

.collection-link:hover {
    gap: var(--space-3);
}

/* ============================================
   About Section
   ============================================ */
.about {
    background: var(--color-bg-alt);
    padding: var(--space-32) 0;
}

.about-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 var(--space-8);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-20);
    align-items: center;
}

.about-visual {
    position: relative;
}

.about-image-wrapper {
    position: relative;
    overflow: hidden;
}

.about-image {
    aspect-ratio: 3/4;
    background-size: cover;
    background-position: center;
    transition: transform var(--transition-slow);
}

.about-visual:hover .about-image {
    transform: scale(1.02);
}

.about-accent {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100%;
    height: 100%;
    border: 1px solid var(--color-accent);
    z-index: -1;
}

.about-content {
    max-width: 540px;
}

.about-content .section-title {
    margin-bottom: var(--space-8);
}

.about-text {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
    line-height: 1.8;
}

.about-stats {
    display: flex;
    gap: var(--space-12);
    margin-top: var(--space-12);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.stat-number {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 500;
    color: var(--color-accent);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    letter-spacing: 0.05em;
}

/* ============================================
   Products Section
   ============================================ */
.products {
    background: var(--color-bg);
    padding-bottom: var(--space-32);
}

.products-grid {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 var(--space-8);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

.product-card {
    cursor: pointer;
}

.product-image-wrapper {
    position: relative;
    aspect-ratio: 3/4;
    overflow: hidden;
    background: var(--color-bg-alt);
    margin-bottom: var(--space-4);
}

.product-image {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transition: transform var(--transition-slow);
}

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

.product-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

.product-btn {
    padding: var(--space-3) var(--space-6);
    background: white;
    color: var(--color-text);
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transform: translateY(20px);
    transition: all var(--transition-base);
}

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

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

.product-name {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 500;
    margin-bottom: var(--space-1);
}

.product-price {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    letter-spacing: 0.05em;
}

.products-cta {
    text-align: center;
    margin-top: var(--space-16);
}

/* ============================================
   Lookbook Section
   ============================================ */
.lookbook {
    background: var(--color-text);
    color: var(--color-bg);
    padding: var(--space-32) 0;
}

.lookbook-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-16);
    padding: 0 var(--space-8);
}

.lookbook-header .section-label {
    color: var(--color-accent);
}

.lookbook-header .section-title {
    color: var(--color-bg);
    margin-bottom: var(--space-4);
}

.lookbook-subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-muted);
    font-weight: 300;
}

.lookbook-grid {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 var(--space-8);
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 400px);
    gap: var(--space-4);
}

.lookbook-item {
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.lookbook-large {
    grid-column: span 2;
    grid-row: span 2;
}

.lookbook-wide {
    grid-column: span 2;
}

.lookbook-image {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transition: transform var(--transition-slow);
}

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

.lookbook-caption {
    position: absolute;
    bottom: var(--space-6);
    left: var(--space-6);
    padding: var(--space-2) var(--space-4);
    background: rgba(255,255,255,0.9);
    color: var(--color-text);
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

/* ============================================
   Newsletter Section
   ============================================ */
.newsletter {
    background: var(--color-bg-alt);
    padding: var(--space-32) var(--space-8);
}

.newsletter-container {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.newsletter-title {
    font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl));
    margin-bottom: var(--space-4);
}

.newsletter-text {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
    line-height: 1.7;
}

.newsletter-form {
    display: flex;
    gap: var(--space-2);
    max-width: 480px;
    margin: 0 auto;
}

.newsletter-input {
    flex: 1;
    padding: var(--space-4) var(--space-5);
    font-size: var(--text-base);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    outline: none;
    transition: border-color var(--transition-base);
}

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

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

.newsletter-btn {
    padding: var(--space-4) var(--space-8);
    background: var(--color-text);
    color: var(--color-bg);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: all var(--transition-base);
    white-space: nowrap;
}

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

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-text);
    color: var(--color-bg);
    padding: var(--space-20) var(--space-8) var(--space-8);
}

.footer-container {
    max-width: 1600px;
    margin: 0 auto;
}

.footer-main {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-20);
    padding-bottom: var(--space-16);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-logo {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 600;
    letter-spacing: 0.15em;
    display: block;
    margin-bottom: var(--space-4);
}

.footer-tagline {
    font-size: var(--text-base);
    color: var(--color-text-muted);
    max-width: 280px;
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
}

.footer-column h4 {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--space-6);
    color: var(--color-bg);
}

.footer-column a {
    display: block;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-3);
    transition: color var(--transition-base);
}

.footer-column a:hover {
    color: var(--color-bg);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-8);
}

.footer-copyright {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.footer-social {
    display: flex;
    gap: var(--space-6);
}

.footer-social a {
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    transition: color var(--transition-base);
}

.footer-social a:hover {
    color: var(--color-bg);
}

/* ============================================
   Animations & Reveals
   ============================================ */
.reveal-text {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-text.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-card {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-image {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 1s ease, transform 1s ease;
}

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

/* Stagger delays */
.reveal-text:nth-child(1) { transition-delay: 0.1s; }
.reveal-text:nth-child(2) { transition-delay: 0.2s; }
.reveal-text:nth-child(3) { transition-delay: 0.3s; }
.reveal-text:nth-child(4) { transition-delay: 0.4s; }
.reveal-text:nth-child(5) { transition-delay: 0.5s; }

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1200px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-container {
        gap: var(--space-12);
    }
}

@media (max-width: 992px) {
    .nav-links {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .collection-featured {
        grid-column: span 12;
        min-height: 500px;
    }
    
    .collection-card:not(.collection-featured) {
        grid-column: span 6;
    }
    
    .about-container {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }
    
    .about-visual {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .about-content {
        max-width: 100%;
        text-align: center;
    }
    
    .about-stats {
        justify-content: center;
    }
    
    .lookbook-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(3, 300px);
    }
    
    .lookbook-large {
        grid-column: span 2;
        grid-row: span 1;
    }
    
    .lookbook-wide {
        grid-column: span 2;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }
    
    .footer-brand {
        text-align: center;
    }
    
    .footer-tagline {
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    :root {
        --text-5xl: 2.5rem;
        --text-6xl: 3.5rem;
        --text-7xl: 4rem;
    }
    
    .nav {
        padding: var(--space-4) var(--space-5);
    }
    
    .hero-content {
        padding: var(--space-5);
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .collection-card:not(.collection-featured) {
        grid-column: span 12;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
    
    .lookbook-grid {
        grid-template-columns: 1fr;
        grid-template-rows: repeat(4, 300px);
    }
    
    .lookbook-large,
    .lookbook-wide {
        grid-column: span 1;
    }
    
    .about-stats {
        flex-direction: column;
        gap: var(--space-6);
    }
    
    .stat {
        align-items: center;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .newsletter-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .section-header {
        padding: var(--space-20) var(--space-5) var(--space-10);
    }
    
    .collections-grid,
    .products-grid,
    .lookbook-grid {
        padding-left: var(--space-5);
        padding-right: var(--space-5);
    }
    
    .collection-content {
        padding: var(--space-5);
    }
    
    .collection-featured .collection-title {
        font-size: var(--text-2xl);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .reveal-text,
    .reveal-card,
    .reveal-image {
        opacity: 1;
        transform: none;
    }
}