/* ============================================
   SHIELD - Premium Mobile Covers
   Design System: Volcanic Glass
   ============================================ */

/* CSS Variables */
:root {
    /* Colors - Volcanic Glass Palette */
    --color-bg: #0A0A0A;
    --color-surface: #141414;
    --color-surface-elevated: #1A1A1A;
    --color-text: #FFFFFF;
    --color-text-muted: #888888;
    --color-text-subtle: #555555;
    --color-accent: #FF6B2B;
    --color-accent-light: #FFB088;
    --color-border: #2A2A2A;
    
    /* Typography */
    --font-display: 'Clash Grotesk', sans-serif;
    --font-body: 'Newsreader', serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 5rem;
    --space-3xl: 8rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* 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;
    overflow-x: hidden;
}

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

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

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

.nav.scrolled {
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-text);
}

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

.nav-links a {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition-fast);
}

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

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

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

.cart-count {
    position: absolute;
    top: -5px;
    right: -5px;
    width: 18px;
    height: 18px;
    background: var(--color-accent);
    color: var(--color-bg);
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-fast);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: calc(var(--space-3xl) + 80px) var(--space-lg) var(--space-2xl);
    position: relative;
    overflow: hidden;
}

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

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-accent) 0%, transparent 70%);
    top: -200px;
    right: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--color-accent-light) 0%, transparent 70%);
    bottom: -100px;
    left: 10%;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

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

.hero-tag {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.hero-title {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
    line-height: 1;
}

.hero-title .line {
    display: block;
}

.hero-title .accent {
    color: var(--color-accent);
    position: relative;
}

.hero-title .accent::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 8px;
    background: var(--color-accent);
    opacity: 0.3;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
    max-width: 480px;
}

.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-display);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--color-accent-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 107, 43, 0.3);
}

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

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

/* Hero Visual */
.hero-visual {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.phone-mockup {
    position: relative;
    width: 300px;
    height: 600px;
    animation: phoneFloat 6s ease-in-out infinite;
}

@keyframes phoneFloat {
    0%, 100% { transform: translateY(0) rotateY(-5deg); }
    50% { transform: translateY(-20px) rotateY(5deg); }
}

.phone-case {
    width: 100%;
    height: 100%;
    background: linear-gradient(145deg, #1a1a1a 0%, #0a0a0a 100%);
    border-radius: 40px;
    border: 3px solid var(--color-border);
    position: relative;
    overflow: hidden;
    box-shadow: 
        0 50px 100px rgba(0, 0, 0, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.case-pattern {
    position: absolute;
    inset: 20px;
    background: 
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 10px,
            rgba(255, 107, 43, 0.1) 10px,
            rgba(255, 107, 43, 0.1) 20px
        );
    border-radius: 24px;
}

/* ============================================
   Products Section
   ============================================ */
.products {
    padding: var(--space-3xl) var(--space-lg);
    max-width: 1400px;
    margin: 0 auto;
}

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

.section-header.left {
    text-align: left;
}

.section-tag {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
}

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

.product-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-base);
    border: 1px solid var(--color-border);
}

.product-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-accent);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.product-image {
    position: relative;
    aspect-ratio: 1;
    background: var(--color-surface-elevated);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-badge {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    background: var(--color-accent);
    color: var(--color-bg);
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Case Previews */
.case-preview {
    width: 60%;
    height: 80%;
    border-radius: 24px;
    transition: var(--transition-base);
}

.case-matte {
    background: linear-gradient(145deg, #2a2a2a 0%, #1a1a1a 100%);
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.3);
}

.case-leather {
    background: linear-gradient(145deg, #8B4513 0%, #5D3A1A 100%);
    background-image: 
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 2px,
            rgba(0, 0, 0, 0.1) 2px,
            rgba(0, 0, 0, 0.1) 4px
        );
}

.case-carbon {
    background: 
        repeating-linear-gradient(
            0deg,
            #1a1a1a,
            #1a1a1a 2px,
            #2a2a2a 2px,
            #2a2a2a 4px
        ),
        repeating-linear-gradient(
            90deg,
            #1a1a1a,
            #1a1a1a 2px,
            #2a2a2a 2px,
            #2a2a2a 4px
        );
}

.case-marble {
    background: 
        radial-gradient(ellipse at 30% 20%, rgba(255, 255, 255, 0.3) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(255, 255, 255, 0.2) 0%, transparent 40%),
        linear-gradient(145deg, #3a3a3a 0%, #1a1a1a 100%);
}

.product-card:hover .case-preview {
    transform: scale(1.05) rotateY(5deg);
}

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

.product-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.product-desc {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: var(--space-md);
}

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.product-price {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
}

.add-to-cart {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 500;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
}

.add-to-cart:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-bg);
}

/* ============================================
   Categories Section
   ============================================ */
.categories {
    padding: var(--space-3xl) var(--space-lg);
    max-width: 1400px;
    margin: 0 auto;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 300px);
    gap: var(--space-md);
}

.category-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    transition: var(--transition-base);
}

.category-card:hover {
    border-color: var(--color-accent);
}

.category-card.large {
    grid-row: span 2;
}

.category-image {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.category-pattern {
    position: absolute;
    inset: 0;
    opacity: 0.5;
    transition: var(--transition-base);
}

.pattern-minimal {
    background: 
        linear-gradient(135deg, transparent 25%, rgba(255, 107, 43, 0.1) 25%, rgba(255, 107, 43, 0.1) 50%, transparent 50%),
        linear-gradient(45deg, transparent 25%, rgba(255, 107, 43, 0.05) 25%, rgba(255, 107, 43, 0.05) 50%, transparent 50%);
    background-size: 40px 40px;
}

.pattern-bold {
    background: 
        radial-gradient(circle at 20% 80%, var(--color-accent) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, var(--color-accent-light) 0%, transparent 40%);
}

.pattern-luxe {
    background: 
        linear-gradient(145deg, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 20px,
            rgba(255, 255, 255, 0.03) 20px,
            rgba(255, 255, 255, 0.03) 40px
        );
}

.category-card:hover .category-pattern {
    transform: scale(1.1);
    opacity: 0.7;
}

.category-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-lg);
    background: linear-gradient(to top, rgba(10, 10, 10, 0.95) 0%, transparent 100%);
}

.category-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-xs);
}

.category-content p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.category-link {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-accent);
    transition: var(--transition-fast);
}

.category-card:hover .category-link {
    color: var(--color-accent-light);
}

/* ============================================
   Features Section
   ============================================ */
.features {
    padding: var(--space-3xl) var(--space-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    max-width: 1400px;
    margin: 0 auto;
    align-items: center;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.feature {
    padding: var(--space-md);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: var(--transition-base);
}

.feature:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--color-surface-elevated);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    color: var(--color-accent);
}

.feature h3 {
    font-size: 1.1rem;
    margin-bottom: var(--space-xs);
}

.feature p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.features-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.floating-case {
    width: 280px;
    height: 500px;
    position: relative;
    animation: phoneFloat 8s ease-in-out infinite;
}

.case-showcase {
    width: 100%;
    height: 100%;
    background: linear-gradient(145deg, #1a1a1a 0%, #0a0a0a 100%);
    border-radius: 40px;
    border: 3px solid var(--color-accent);
    position: relative;
    overflow: hidden;
    box-shadow: 
        0 50px 100px rgba(255, 107, 43, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.case-showcase::before {
    content: '';
    position: absolute;
    inset: 20px;
    background: 
        linear-gradient(135deg, var(--color-accent) 0%, transparent 50%),
        linear-gradient(-45deg, var(--color-accent-light) 0%, transparent 30%);
    opacity: 0.3;
    border-radius: 24px;
}

/* ============================================
   Newsletter Section
   ============================================ */
.newsletter {
    padding: var(--space-3xl) var(--space-lg);
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

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

.newsletter h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    margin-bottom: var(--space-md);
}

.newsletter p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
    font-size: 1.1rem;
}

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

.newsletter-form input {
    flex: 1;
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-md);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-fast);
}

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

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

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: var(--space-2xl) var(--space-lg) var(--space-lg);
    max-width: 1400px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand .logo {
    display: inline-block;
    margin-bottom: var(--space-md);
}

.footer-brand p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
    max-width: 280px;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    transition: var(--transition-fast);
}

.social-links a:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
}

.footer-links h4 {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

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

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

.footer-links a {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-subtle);
    font-size: 0.9rem;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-xl);
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .features {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .features-content {
        max-width: 100%;
    }
    
    .section-header.left {
        text-align: center;
    }
    
    .features-grid {
        max-width: 600px;
        margin-left: auto;
        margin-right: auto;
    }
    
    .features-visual {
        order: -1;
    }
    
    .floating-case {
        width: 200px;
        height: 360px;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .phone-mockup {
        width: 200px;
        height: 400px;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }
    
    .category-card.large {
        grid-row: span 1;
        aspect-ratio: 1;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand p {
        margin-left: auto;
        margin-right: auto;
    }
    
    .social-links {
        justify-content: center;
    }
}

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

.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

/* Scroll-triggered animations */
.product-card,
.feature,
.category-card {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.product-card.visible,
.feature.visible,
.category-card.visible {
    opacity: 1;
    transform: translateY(0);
}