/* ============================================
   VELVET & THREAD - Luxury Hosiery Brand
   Design System: Indigo Ink + Editorial
   ============================================ */

/* CSS Variables */
:root {
    /* Colors - Indigo Ink Palette */
    --color-primary: #1B0A3C;
    --color-secondary: #3D1E7C;
    --color-accent: #7B68EE;
    --color-light: #E8E0F0;
    --color-white: #FAFAFA;
    --color-text: #2C2C2C;
    --color-text-muted: #6B6B6B;
    
    /* Typography */
    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'Manrope', -apple-system, BlinkMacSystemFont, 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-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: cubic-bezier(0.65, 0, 0.35, 1);
}

/* 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-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s var(--transition-smooth);
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 500;
    line-height: 1.2;
    color: var(--color-primary);
}

h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1rem; text-transform: uppercase; letter-spacing: 0.1em; }

p {
    margin-bottom: var(--space-md);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) var(--space-xl);
    background: rgba(250, 250, 250, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(27, 10, 60, 0.05);
}

.nav-brand-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-xl);
}

.nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width 0.3s var(--transition-smooth);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    transition: all 0.3s var(--transition-smooth);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: calc(var(--space-3xl) + 4rem) var(--space-xl) var(--space-3xl);
    gap: var(--space-2xl);
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-light) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(ellipse, rgba(123, 104, 238, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    max-width: 600px;
    z-index: 1;
}

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

.hero-title {
    margin-bottom: var(--space-lg);
    color: var(--color-primary);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
    max-width: 480px;
}

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

.hero-image {
    position: relative;
    height: 100%;
    min-height: 500px;
}

.hero-image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
    border-radius: 2px;
    position: relative;
    overflow: hidden;
}

.hero-image-accent {
    position: absolute;
    bottom: 10%;
    right: 10%;
    width: 60%;
    height: 60%;
    background: radial-gradient(circle, rgba(123, 104, 238, 0.3) 0%, transparent 70%);
    filter: blur(40px);
}

/* 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;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: 0;
    cursor: pointer;
    transition: all 0.3s var(--transition-smooth);
    border: 2px solid transparent;
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

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

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

.section-title {
    margin-bottom: var(--space-sm);
}

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

/* Collections Section */
.collections {
    padding: var(--space-3xl) var(--space-xl);
    background: var(--color-white);
}

.collections-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    max-width: 1400px;
    margin: 0 auto;
}

.collection-card {
    display: flex;
    flex-direction: column;
    background: var(--color-white);
    transition: transform 0.4s var(--transition-smooth);
}

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

.collection-image {
    aspect-ratio: 3/4;
    overflow: hidden;
    margin-bottom: var(--space-md);
}

.collection-image-placeholder {
    width: 100%;
    height: 100%;
    transition: transform 0.6s var(--transition-smooth);
}

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

.collection-content {
    padding: var(--space-sm) 0;
}

.collection-title {
    margin-bottom: var(--space-xs);
    color: var(--color-primary);
}

.collection-desc {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    margin-bottom: var(--space-md);
}

.collection-link {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    position: relative;
}

.collection-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width 0.3s var(--transition-smooth);
}

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

/* About Section */
.about {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    padding: var(--space-3xl);
    background: var(--color-light);
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image-placeholder {
    aspect-ratio: 4/5;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    position: relative;
}

.about-image-frame {
    position: absolute;
    top: var(--space-lg);
    left: var(--space-lg);
    right: calc(-1 * var(--space-lg));
    bottom: calc(-1 * var(--space-lg));
    border: 2px solid var(--color-accent);
    pointer-events: none;
}

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

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

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

.about-text {
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.about-stats {
    display: flex;
    gap: var(--space-xl);
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(27, 10, 60, 0.1);
}

.stat {
    display: flex;
    flex-direction: column;
}

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

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Craftsmanship Section */
.craftsmanship {
    padding: var(--space-3xl) var(--space-xl);
    background: var(--color-primary);
    color: var(--color-white);
}

.craftsmanship-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

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

.craftsmanship-title {
    color: var(--color-white);
    margin-bottom: var(--space-2xl);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    text-align: left;
}

.process-step {
    padding: var(--space-lg);
    border-left: 1px solid rgba(123, 104, 238, 0.3);
}

.step-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 300;
    color: var(--color-accent);
    opacity: 0.6;
    line-height: 1;
    margin-bottom: var(--space-md);
    display: block;
}

.step-title {
    color: var(--color-white);
    margin-bottom: var(--space-sm);
    font-size: 1.25rem;
}

.step-desc {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
    margin: 0;
}

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

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

.newsletter-title {
    margin-bottom: var(--space-md);
}

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

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

.newsletter-input {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-body);
    font-size: 1rem;
    border: 2px solid var(--color-light);
    background: var(--color-white);
    color: var(--color-text);
    transition: border-color 0.3s var(--transition-smooth);
}

.newsletter-input:focus {
    outline: none;
    border-color: var(--color-accent);
}

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

/* Footer */
.footer {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-3xl) var(--space-xl) var(--space-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--space-2xl);
    max-width: 1400px;
    margin: 0 auto var(--space-2xl);
}

.footer-brand-text {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 600;
    display: block;
    margin-bottom: var(--space-sm);
}

.footer-tagline {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9375rem;
    margin: 0;
}

.footer-heading {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

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

.footer-links li {
    margin-bottom: var(--space-xs);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
    transition: color 0.3s var(--transition-smooth);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(123, 104, 238, 0.2);
    max-width: 1400px;
    margin: 0 auto;
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
    margin: 0;
}

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

.footer-social a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    font-weight: 600;
    transition: color 0.3s var(--transition-smooth);
}

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

/* Responsive Design */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: calc(var(--space-3xl) + 2rem);
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-image {
        min-height: 400px;
        order: -1;
    }
    
    .collections-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .about-image-frame {
        right: var(--space-lg);
        bottom: var(--space-lg);
    }
    
    .process-steps {
        grid-template-columns: 1fr;
    }
    
    .process-step {
        border-left: none;
        border-top: 1px solid rgba(123, 104, 238, 0.3);
        padding-left: 0;
    }
    
    .process-step:first-child {
        border-top: none;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav {
        padding: var(--space-md);
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        padding: var(--space-md);
        gap: var(--space-md);
        border-bottom: 1px solid var(--color-light);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero {
        padding: calc(var(--space-2xl) + 4rem) var(--space-md) var(--space-2xl);
    }
    
    .collections {
        padding: var(--space-2xl) var(--space-md);
    }
    
    .collections-grid {
        grid-template-columns: 1fr;
    }
    
    .about {
        padding: var(--space-2xl) var(--space-md);
    }
    
    .about-stats {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    .craftsmanship {
        padding: var(--space-2xl) var(--space-md);
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--transition-slow), transform 0.8s var(--transition-slow);
}

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

/* Selection Color */
::selection {
    background: var(--color-accent);
    color: var(--color-white);
}