:root {
    /* Corporate Light Theme */
    --bg-main: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-card: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --primary: #0066cc;
    --primary-dark: #0052a3;
    --primary-light: #e0f2fe;
    --accent: #059669;
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);

    /* Fonts */
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

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

/* ==================== */
/* Container            */
/* ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ==================== */
/* Buttons              */
/* ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
    text-align: center;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--text-main);
    color: white;
}

.btn-secondary:hover {
    background: #334155;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

/* ==================== */
/* Navbar               */
/* ==================== */
.navbar {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.navbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.5px;
    z-index: 1002;
}

.logo span {
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: var(--spacing-xl);
    list-style: none;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-links li {
    list-style: none;
}

.nav-links a {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-sm) 0;
    position: relative;
    display: block;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.2s ease;
}

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

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

.nav-cta .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 6px;
    width: 44px;
    height: 44px;
    padding: 10px;
    cursor: pointer;
    background: none;
    border: none;
    z-index: 1002;
    position: relative;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-main);
    transition: all 0.3s ease;
    transform-origin: center;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

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

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ==================== */
/* Hero Section         */
/* ==================== */
.hero {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-main) 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 50px;
    margin-bottom: var(--spacing-lg);
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -1px;
    line-height: 1.1;
}

.hero h1 span {
    color: var(--primary);
}

.hero p {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

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

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

/* ==================== */
/* Section Styles       */
/* ==================== */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-alt {
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto var(--spacing-2xl);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-main);
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ==================== */
/* Features Section     */
/* ==================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.feature-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.feature-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.feature-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.feature-card-content {
    padding: var(--spacing-lg);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ==================== */
/* Gallery Section      */
/* ==================== */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.gallery-item {
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    aspect-ratio: 16/10;
    box-shadow: var(--shadow-sm);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.gallery-item:hover img {
    transform: scale(1.05);
}

/* ==================== */
/* Products Section     */
/* ==================== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
}

.product-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.product-img {
    width: 100%;
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    padding: var(--spacing-xl);
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.3s ease;
}

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

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

.product-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.product-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
}

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

.product-price {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-main);
}

.product-footer .btn {
    padding: 10px 18px;
    font-size: 0.85rem;
}

/* ==================== */
/* Footer               */
/* ==================== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-2xl) 0;
    margin-top: var(--spacing-3xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.footer-brand .logo {
    margin-bottom: var(--spacing-sm);
    display: block;
}

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

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

.footer-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

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

.footer-bottom {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-light);
    font-size: 0.85rem;
}

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

.product-detail-container {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-3xl);
}

.product-gallery {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.main-image {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
}

.main-image img {
    width: 100%;
    height: auto;
    object-fit: contain;
    max-height: 450px;
}

.thumbnail-grid {
    display: flex;
    gap: var(--spacing-md);
    overflow-x: auto;
    padding-bottom: var(--spacing-sm);
}

.thumbnail-grid img {
    width: 72px;
    height: 72px;
    object-fit: contain;
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
    cursor: pointer;
    background: var(--bg-main);
    padding: 6px;
    transition: all 0.2s ease;
}

.thumbnail-grid img:hover {
    border-color: var(--border-hover);
}

.thumbnail-grid img.active {
    border-color: var(--primary);
}

.product-details-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.p-title {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.2;
}

.p-rating {
    color: #f59e0b;
    font-weight: 600;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.p-rating span {
    color: var(--text-muted);
    font-weight: 400;
    font-size: 0.9rem;
}

.p-price {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.old-price {
    text-decoration: line-through;
    color: var(--text-light);
    font-size: 1.1rem;
    font-weight: 500;
}

.save-badge {
    background: #dcfce7;
    color: #16a34a;
    font-size: 0.8rem;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.p-description {
    color: var(--text-muted);
    line-height: 1.7;
    font-size: 1rem;
}

.p-options {
    margin-top: var(--spacing-sm);
}

.p-options label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--text-main);
}

.option-pill {
    display: inline-block;
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-weight: 500;
    background: var(--bg-secondary);
    font-size: 0.9rem;
}

.config-grid {
    display: flex;
    gap: var(--spacing-md);
}

.config-item {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px;
    width: 80px;
    height: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--bg-main);
}

.config-item:hover {
    border-color: var(--border-hover);
}

.config-item.selected {
    border-color: var(--primary);
    background: var(--primary-light);
}

.config-item svg {
    width: 28px;
    height: 28px;
    margin-bottom: 4px;
    color: var(--text-main);
}

.config-item span {
    font-size: 0.7rem;
    font-weight: 500;
    text-align: center;
}

.p-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.qty-input {
    width: 64px;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-align: center;
    font-size: 1rem;
    font-weight: 600;
}

.qty-input:focus {
    outline: none;
    border-color: var(--primary);
}

.full-width {
    flex: 1;
}

.p-meta {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ==================== */
/* Responsive Styles    */
/* ==================== */
@media (max-width: 1024px) {
    .hero .container {
        gap: var(--spacing-xl);
    }
    
    .features-grid {
        gap: var(--spacing-lg);
    }
}

@media (max-width: 900px) {
    .product-detail-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    /* Mobile Navbar */
    .menu-toggle {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        height: 100vh;
        background: var(--bg-main);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--spacing-xl);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
        z-index: 1001;
    }
    
    .nav-links.active {
        opacity: 1;
        visibility: visible;
    }
    
    .nav-links li {
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 0.3s ease, transform 0.3s ease;
    }
    
    .nav-links.active li {
        opacity: 1;
        transform: translateY(0);
    }
    
    .nav-links.active li:nth-child(1) { transition-delay: 0.1s; }
    .nav-links.active li:nth-child(2) { transition-delay: 0.15s; }
    .nav-links.active li:nth-child(3) { transition-delay: 0.2s; }
    .nav-links.active li:nth-child(4) { transition-delay: 0.25s; }
    
    .nav-links a {
        font-size: 1.5rem;
        font-weight: 600;
        color: var(--text-main);
    }
    
    .nav-links a::after {
        display: none;
    }
    
    .nav-cta {
        display: none;
    }
    
    /* Mobile Hero */
    .hero {
        padding: var(--spacing-xl) 0 var(--spacing-2xl);
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .hero-content {
        max-width: 100%;
        order: 2;
    }
    
    .hero-image {
        order: 1;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero h1 {
        font-size: 2.25rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    /* Mobile Sections */
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    /* Mobile Footer */
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-lg);
    }
    
    /* Mobile Product Detail */
    .p-title {
        font-size: 1.5rem;
    }
    
    .p-price {
        font-size: 1.5rem;
    }
    
    .p-actions {
        flex-direction: column;
    }
    
    .qty-input {
        width: 100%;
    }
    
    .p-meta {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero h1 {
        font-size: 1.875rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .product-img {
        height: 220px;
        padding: var(--spacing-lg);
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}