/* LandInLamp - Premium LED Tail Lights Website Styles */

/* ================================
   CSS Variables & Reset
================================ */
:root {
    --color-primary: #e63946;
    --color-primary-dark: #c1121f;
    --color-secondary: #f4a261;
    --color-dark: #0d0d0d;
    --color-dark-secondary: #1a1a1a;
    --color-dark-tertiary: #2d2d2d;
    --color-gray: #6c757d;
    --color-gray-light: #adb5bd;
    --color-white: #ffffff;
    --color-off-white: #f8f9fa;
    
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;
    
    --border-radius: 8px;
    --border-radius-lg: 16px;
    --transition: all 0.3s ease;
    
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
    --shadow-glow: 0 0 30px rgba(230, 57, 70, 0.3);
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-white);
    background-color: var(--color-dark);
    overflow-x: hidden;
}

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

a:hover {
    color: var(--color-secondary);
}

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

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ================================
   Typography
================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-white);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--color-primary);
    margin: var(--spacing-sm) auto 0;
}

.section-subtitle {
    text-align: center;
    color: var(--color-gray-light);
    margin-top: -var(--spacing-xs);
    margin-bottom: var(--spacing-xl);
}

/* ================================
   Buttons
================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 2rem;
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    color: var(--color-white);
}

.btn-secondary {
    background: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-white);
}

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

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1rem;
}

.btn-icon {
    font-size: 1.25rem;
}

/* ================================
   Header & Navigation
================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(13, 13, 13, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    transition: var(--transition);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.logo-icon {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-white);
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-menu li a {
    color: var(--color-white);
    font-weight: 500;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: var(--spacing-xs) 0;
    position: relative;
}

.nav-menu li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

.nav-menu li a:hover::after,
.nav-menu li a.active::after {
    width: 100%;
}

.nav-menu li a:hover,
.nav-menu li a.active {
    color: var(--color-primary);
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-dark-secondary);
    min-width: 200px;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.dropdown-menu li a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--color-gray-light);
    font-size: 0.85rem;
}

.dropdown-menu li a:hover {
    background: var(--color-dark-tertiary);
    color: var(--color-white);
}

/* Mobile Menu Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-white);
    transition: var(--transition);
}

/* ================================
   Hero Section
================================ */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
    margin-top: 80px;
}

.hero-carousel {
    position: relative;
    height: 100%;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.hero-slide.active {
    opacity: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        rgba(13, 13, 13, 0.3) 0%,
        rgba(13, 13, 13, 0.6) 50%,
        rgba(13, 13, 13, 0.9) 100%
    );
}

.hero-content {
    position: absolute;
    bottom: 20%;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 10;
}

.hero-content h1 {
    font-size: 4rem;
    text-transform: uppercase;
    letter-spacing: 8px;
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 4px 20px rgba(0,0,0,0.5);
}

.hero-content p {
    font-size: 1.5rem;
    color: var(--color-gray-light);
    letter-spacing: 4px;
    text-transform: uppercase;
}

.hero-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    z-index: 10;
}

.hero-prev,
.hero-next {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: var(--color-white);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.hero-prev:hover,
.hero-next:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.hero-dots {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--spacing-sm);
    z-index: 10;
}

.hero-dot {
    width: 12px;
    height: 12px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.hero-dot.active {
    background: var(--color-primary);
    transform: scale(1.2);
}

/* ================================
   Brands Section
================================ */
.brands-section {
    padding: var(--spacing-2xl) 0;
    background: var(--color-dark-secondary);
}

.brands-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.brand-card {
    background: linear-gradient(145deg, var(--color-dark-tertiary), var(--color-dark));
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.brand-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transform: scaleX(0);
    transition: var(--transition);
}

.brand-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(230, 57, 70, 0.3);
}

.brand-card:hover::before {
    transform: scaleX(1);
}

.brand-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--color-dark), var(--color-dark-tertiary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.brand-card h3 {
    color: var(--color-white);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.product-count {
    color: var(--color-gray-light);
    font-size: 0.875rem;
}

/* ================================
   Products Grid
================================ */
.featured-section,
.brand-products {
    padding: var(--spacing-2xl) 0;
}

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

.product-card {
    background: var(--color-dark-secondary);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.product-image {
    position: relative;
    height: 200px;
    background: var(--color-dark-tertiary);
    overflow: hidden;
}

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

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

.product-badge {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.25rem 0.75rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    border-radius: 20px;
}

.product-position {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: rgba(0, 0, 0, 0.7);
    color: var(--color-white);
    padding: 0.25rem 0.75rem;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 20px;
}

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

.product-info h3 {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.product-sku {
    color: var(--color-primary);
    font-size: 0.875rem;
    font-weight: 600;
}

.product-oe {
    color: var(--color-gray-light);
    font-size: 0.8rem;
    margin: var(--spacing-xs) 0;
}

.product-model {
    color: var(--color-gray);
    font-size: 0.8rem;
    margin-bottom: var(--spacing-sm);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.product-info .btn-small {
    width: 100%;
    margin-top: var(--spacing-xs);
}

/* ================================
   CTA Section
================================ */
.cta-section {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-secondary) 100%);
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-content h2 {
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    margin-bottom: var(--spacing-lg);
    font-size: 1.125rem;
    opacity: 0.9;
}

/* ================================
   Inquiry Section
================================ */
.inquiry-section {
    padding: var(--spacing-2xl) 0;
    background: var(--color-dark-secondary);
}

.inquiry-box {
    background: linear-gradient(145deg, var(--color-dark-tertiary), var(--color-dark));
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.inquiry-box h3 {
    margin-bottom: var(--spacing-sm);
}

.inquiry-box p {
    color: var(--color-gray-light);
    margin-bottom: var(--spacing-lg);
}

/* ================================
   Page Header
================================ */
.page-header {
    background: linear-gradient(to bottom, var(--color-dark-secondary), var(--color-dark));
    padding: 140px 0 var(--spacing-xl);
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.page-header h1 {
    margin-bottom: var(--spacing-sm);
}

.breadcrumb {
    color: var(--color-gray-light);
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--color-gray-light);
}

.breadcrumb a:hover {
    color: var(--color-primary);
}

/* ================================
   Product Detail
================================ */
.product-detail {
    padding: var(--spacing-xl) 0 var(--spacing-2xl);
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.product-gallery {
    position: sticky;
    top: 100px;
}

.main-image {
    background: var(--color-dark-secondary);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.main-image img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
}

.product-info-detail {
    padding: var(--spacing-md) 0;
}

.product-brand {
    display: inline-block;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    border-radius: 20px;
    margin-bottom: var(--spacing-sm);
}

.product-info-detail h1 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.product-name-cn {
    color: var(--color-gray-light);
    margin-bottom: var(--spacing-lg);
}

.product-specs {
    background: var(--color-dark-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.spec-item {
    display: flex;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.spec-item:last-child {
    border-bottom: none;
}

.spec-item.full-width {
    flex-direction: column;
}

.spec-item label {
    width: 140px;
    color: var(--color-gray-light);
    font-size: 0.875rem;
}

.spec-item span {
    color: var(--color-white);
    font-weight: 500;
}

.product-description {
    margin-bottom: var(--spacing-lg);
}

.product-description h3 {
    margin-bottom: var(--spacing-sm);
}

.product-description p {
    color: var(--color-gray-light);
    line-height: 1.8;
}

.product-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.product-actions .btn {
    flex: 1;
    min-width: 200px;
}

/* ================================
   About Page
================================ */
.about-content {
    padding: var(--spacing-2xl) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-text h2 {
    margin-bottom: var(--spacing-md);
}

.about-text h3 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.about-text p {
    color: var(--color-gray-light);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.brand-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xs);
    margin: var(--spacing-md) 0;
}

.brand-list li {
    color: var(--color-gray-light);
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
}

.brand-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.about-image {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.about-image img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
}

.features-section {
    padding: var(--spacing-2xl) 0;
    background: var(--color-dark-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--color-dark);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.feature-card h3 {
    margin-bottom: var(--spacing-xs);
}

.feature-card p {
    color: var(--color-gray-light);
    font-size: 0.875rem;
}

/* ================================
   Contact Page
================================ */
.contact-content {
    padding: var(--spacing-2xl) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-xl);
}

.contact-info h2 {
    margin-bottom: var(--spacing-md);
}

.contact-info > p {
    color: var(--color-gray-light);
    margin-bottom: var(--spacing-lg);
}

.contact-methods {
    margin-top: var(--spacing-lg);
}

.contact-method {
    margin-bottom: var(--spacing-lg);
}

.contact-method h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.contact-method p {
    color: var(--color-gray-light);
}

.contact-form-wrapper {
    background: var(--color-dark-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.contact-form-wrapper h3 {
    margin-bottom: var(--spacing-lg);
}

.contact-form .form-group {
    margin-bottom: var(--spacing-md);
}

.contact-form label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--color-gray-light);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--color-dark);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    color: var(--color-white);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.2);
}

.contact-form select {
    cursor: pointer;
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form .btn {
    width: 100%;
}

/* ================================
   Footer
================================ */
.footer {
    background: var(--color-dark-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand .logo {
    margin-bottom: var(--spacing-md);
}

.footer-tagline {
    color: var(--color-gray-light);
    font-size: 0.9rem;
}

.footer-links h4 {
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

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

.footer-links ul li a {
    color: var(--color-gray-light);
    font-size: 0.9rem;
}

.footer-links ul li a:hover {
    color: var(--color-primary);
}

.footer-contact h4 {
    margin-bottom: var(--spacing-md);
}

.footer-contact p {
    color: var(--color-gray-light);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-gray);
    font-size: 0.875rem;
}

/* ================================
   Responsive Design
================================ */
@media (max-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 992px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .hero-content h1 {
        font-size: 2.5rem;
        letter-spacing: 4px;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .product-detail-grid {
        grid-template-columns: 1fr;
    }
    
    .product-gallery {
        position: static;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        order: -1;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--color-dark);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .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);
    }
    
    .dropdown-menu {
        position: static;
        transform: none;
        box-shadow: none;
        background: transparent;
        padding-left: var(--spacing-md);
    }
    
    .dropdown-menu li a {
        color: var(--color-gray-light);
    }
    
    .hero {
        min-height: 500px;
    }
    
    .hero-nav {
        display: none;
    }
    
    .brands-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .product-actions {
        flex-direction: column;
    }
    
    .product-actions .btn {
        width: 100%;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand .logo {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    
    .hero-content h1 {
        font-size: 1.75rem;
    }
    
    .brands-grid {
        grid-template-columns: 1fr;
    }
    
    .brand-logo {
        width: 60px;
        height: 60px;
        font-size: 1.25rem;
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
    }
    
    .btn-large {
        padding: 0.875rem 2rem;
    }
}

/* ================================
   Utility Classes
================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.hidden { display: none; }
.visible { display: block; }

/* Loading Animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.6s ease-out forwards;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--color-dark-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}