/* TechVault - Premium Mobile Accessories */
/* Design System: Acid Neon + Brutalist Elements */

:root {
    /* Acid Neon Palette */
    --neon-lime: #CCFF00;
    --neon-pink: #FF3CAC;
    --dark-bg: #0D0D0D;
    --darker-bg: #080808;
    --card-bg: #1A1A2E;
    --text-primary: #FFFFFF;
    --text-secondary: #A0A0B0;
    --text-muted: #6B6B7B;
    --border-color: #2A2A3E;
    
    /* Typography */
    --font-display: 'Clash Display', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    
    /* Spacing */
    --section-padding: 120px;
    --container-max: 1400px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition-medium);
}

.nav.scrolled {
    background: rgba(13, 13, 13, 0.9);
    backdrop-filter: blur(20px);
    padding: 16px 0;
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.5rem;
}

.logo-icon {
    color: var(--neon-lime);
    font-size: 1.75rem;
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-links a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    position: relative;
}

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

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

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

.cart-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.cart-btn:hover {
    border-color: var(--neon-lime);
    color: var(--neon-lime);
}

.cart-count {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--neon-pink);
    color: var(--dark-bg);
    font-size: 0.7rem;
    font-weight: 700;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
    padding: 8px;
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 24px 80px;
    position: relative;
    overflow: hidden;
}

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

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--neon-lime);
    top: -200px;
    right: -100px;
    animation: float 8s ease-in-out infinite;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--neon-pink);
    bottom: -100px;
    left: -100px;
    animation: float 10s ease-in-out infinite reverse;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: #7B68EE;
    top: 50%;
    left: 30%;
    animation: float 12s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-tag {
    display: inline-block;
    background: rgba(204, 255, 0, 0.1);
    border: 1px solid var(--neon-lime);
    color: var(--neon-lime);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 24px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    line-height: 1;
    margin-bottom: 24px;
}

.title-line {
    display: block;
}

.title-line.highlight {
    color: var(--neon-lime);
    position: relative;
}

.title-line.highlight::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 8px;
    background: var(--neon-pink);
    opacity: 0.3;
    z-index: -1;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 480px;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    border-radius: 12px;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    border: none;
}

.btn-primary {
    background: var(--neon-lime);
    color: var(--dark-bg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(204, 255, 0, 0.3);
}

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

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

/* Hero Visual */
.hero-visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1;
}

.phone-mockup {
    position: relative;
    width: 320px;
    height: 640px;
}

.phone-frame {
    width: 100%;
    height: 100%;
    background: linear-gradient(145deg, #2A2A3E, #1A1A2E);
    border-radius: 40px;
    padding: 12px;
    box-shadow: 
        0 50px 100px rgba(0, 0, 0, 0.5),
        inset 0 2px 4px rgba(255, 255, 255, 0.1);
    position: relative;
}

.phone-frame::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 24px;
    background: var(--dark-bg);
    border-radius: 12px;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--dark-bg);
    border-radius: 32px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.screen-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    padding: 40px;
}

.app-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--neon-lime), var(--neon-pink));
    animation: pulse 2s ease-in-out infinite;
}

.app-icon:nth-child(2) { animation-delay: 0.5s; }
.app-icon:nth-child(3) { animation-delay: 1s; }
.app-icon:nth-child(4) { animation-delay: 1.5s; }

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.05); opacity: 1; }
}

.floating-card {
    position: absolute;
    background: rgba(26, 26, 46, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    animation: floatCard 6s ease-in-out infinite;
}

.card-1 {
    top: 20%;
    left: -60px;
}

.card-2 {
    bottom: 25%;
    right: -40px;
    animation-delay: 1s;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.card-icon {
    font-size: 1.5rem;
}

.card-text {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

/* Features Section */
.features {
    padding: var(--section-padding) 0;
    background: var(--darker-bg);
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-tag {
    display: inline-block;
    color: var(--neon-lime);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px;
    transition: var(--transition-medium);
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    background: rgba(204, 255, 0, 0.1);
    border: 1px solid var(--neon-lime);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--neon-lime);
    margin-bottom: 24px;
}

.feature-card h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Products Section */
.products {
    padding: var(--section-padding) 0;
}

.products-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 12px 24px;
    border-radius: 100px;
    font-family: var(--font-body);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--neon-lime);
    border-color: var(--neon-lime);
    color: var(--dark-bg);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 32px;
}

.product-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    overflow: hidden;
    transition: var(--transition-medium);
}

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

.product-image {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
}

.product-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-gradient {
    background: linear-gradient(135deg, #FF3CAC, #784BA0);
}

.charger-gradient {
    background: linear-gradient(135deg, #CCFF00, #7B68EE);
}

.audio-gradient {
    background: linear-gradient(135deg, #00D4FF, #7B68EE);
}

.cable-gradient {
    background: linear-gradient(135deg, #FF6B2B, #FF3CAC);
}

.case-gradient-2 {
    background: linear-gradient(135deg, #784BA0, #FF3CAC);
}

.charger-gradient-2 {
    background: linear-gradient(135deg, #7B68EE, #CCFF00);
}

.product-icon {
    font-size: 4rem;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.3));
}

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

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

.add-to-cart {
    background: var(--neon-lime);
    color: var(--dark-bg);
    border: none;
    padding: 16px 32px;
    border-radius: 12px;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transform: translateY(20px);
    transition: var(--transition-fast);
}

.product-card:hover .add-to-cart {
    transform: translateY(0);
}

.add-to-cart:hover {
    transform: translateY(0) scale(1.05);
}

.product-info {
    padding: 24px;
}

.product-info h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.product-category {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

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

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

.rating {
    color: var(--neon-pink);
    font-weight: 600;
}

/* Stats Section */
.stats {
    padding: 100px 0;
    background: var(--darker-bg);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    text-align: center;
}

.stat-item {
    padding: 20px;
}

.stat-number {
    font-family: var(--font-display);
    font-size: clamp(3rem, 6vw, 4rem);
    font-weight: 700;
    color: var(--neon-lime);
    line-height: 1;
}

.stat-suffix {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--neon-lime);
}

.stat-label {
    color: var(--text-secondary);
    margin-top: 8px;
    font-size: 1rem;
}

/* CTA Section */
.cta {
    padding: var(--section-padding) 0;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(204, 255, 0, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta h2 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 600;
    margin-bottom: 16px;
}

.cta p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

.cta-form {
    display: flex;
    gap: 12px;
    max-width: 480px;
    margin: 0 auto;
}

.cta-form input {
    flex: 1;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px 20px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
    transition: var(--transition-fast);
}

.cta-form input:focus {
    border-color: var(--neon-lime);
}

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

/* Footer */
.footer {
    padding: 80px 0 40px;
    background: var(--darker-bg);
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
    max-width: 300px;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    width: 44px;
    height: 44px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

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

.footer-links h4 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

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

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.footer-legal a:hover {
    color: var(--text-primary);
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-visual {
        position: relative;
        right: auto;
        top: auto;
        transform: none;
        margin-top: 60px;
        display: flex;
        justify-content: center;
    }
    
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 140px;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .cart-btn {
        margin-left: auto;
        margin-right: 16px;
    }
    
    :root {
        --section-padding: 80px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }
    
    .cta-form {
        flex-direction: column;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .floating-card {
        display: none;
    }
}

/* Cart Modal */
.cart-modal {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    height: 100vh;
    background: var(--card-bg);
    border-left: 1px solid var(--border-color);
    z-index: 2000;
    transition: var(--transition-medium);
    padding: 24px;
    display: flex;
    flex-direction: column;
}

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

.cart-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
}

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

.cart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.cart-header h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
}

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

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

.cart-items {
    flex: 1;
    overflow-y: auto;
}

.cart-empty {
    text-align: center;
    color: var(--text-muted);
    padding: 60px 20px;
}

.cart-footer {
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.cart-total span:last-child {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--neon-lime);
}

.btn-checkout {
    width: 100%;
    background: var(--neon-lime);
    color: var(--dark-bg);
    border: none;
    padding: 16px;
    border-radius: 12px;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-checkout:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(204, 255, 0, 0.3);
}