/* ============================================================
   TECHHUB - Bilgisayar & Donanım E-Ticaret Sitesi
   Ana CSS Dosyası
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
    --primary: #00d4ff;
    --primary-dark: #00a8cc;
    --secondary: #ff6b35;
    --accent: #7c3aed;
    --dark: #0a0a0f;
    --darker: #050508;
    --card-bg: #12121a;
    --card-bg-hover: #1a1a28;
    --surface: #1e1e2e;
    --surface-hover: #252538;
    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b7b;
    --border: #2a2a3a;
    --border-light: #3a3a4a;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --glow-primary: 0 0 20px rgba(0, 212, 255, 0.3);
    --glow-secondary: 0 0 20px rgba(255, 107, 53, 0.3);
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

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

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

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--darker);
}
::-webkit-scrollbar-thumb {
    background: var(--primary-dark);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* ---------- Top Bar ---------- */
.top-bar {
    background: var(--darker);
    border-bottom: 1px solid var(--border);
    padding: 8px 0;
    font-size: 0.85rem;
}
.top-bar-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.top-bar-left, .top-bar-right {
    display: flex;
    gap: 24px;
    align-items: center;
}
.top-bar a {
    color: var(--text-muted);
    transition: var(--transition-fast);
}
.top-bar a:hover {
    color: var(--primary);
}
.top-bar i {
    margin-right: 6px;
    color: var(--primary);
}

/* ---------- Header ---------- */
.main-header {
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 16px 0;
}
.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    gap: 32px;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -1px;
    flex-shrink: 0;
}
.logo-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: white;
    box-shadow: var(--glow-primary);
    transition: var(--transition-normal);
}
.logo:hover .logo-icon {
    transform: rotate(15deg) scale(1.1);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
}
.logo-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Search Bar */
.search-bar {
    flex: 1;
    max-width: 600px;
    position: relative;
}
.search-bar input {
    width: 100%;
    padding: 14px 50px 14px 20px;
    background: var(--card-bg);
    border: 2px solid var(--border);
    border-radius: var(--radius-xl);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: var(--transition-normal);
    outline: none;
}
.search-bar input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.1), var(--glow-primary);
}
.search-bar input::placeholder {
    color: var(--text-muted);
}
.search-bar button {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50%;
    color: white;
    font-size: 1rem;
    transition: var(--transition-normal);
}
.search-bar button:hover {
    transform: translateY(-50%) scale(1.1);
    box-shadow: var(--glow-primary);
}

/* Header Actions */
.header-actions {
    display: flex;
    gap: 16px;
    align-items: center;
}
.header-action {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px 12px;
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    color: var(--text-secondary);
}
.header-action:hover {
    background: var(--surface);
    color: var(--primary);
    transform: translateY(-2px);
}
.header-action i {
    font-size: 1.3rem;
}
.header-action span {
    font-size: 0.75rem;
}
.header-action .badge {
    position: absolute;
    top: 4px;
    right: 4px;
    background: var(--secondary);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

/* ---------- Mega Menu ---------- */
.main-nav {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
}
.nav-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}
.nav-list {
    display: flex;
    gap: 0;
}
.nav-item {
    position: relative;
}
.nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 20px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-secondary);
    position: relative;
    transition: var(--transition-normal);
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
    transition: var(--transition-normal);
    transform: translateX(-50%);
}
.nav-link:hover {
    color: var(--primary);
}
.nav-link:hover::after {
    width: 80%;
}
.nav-link i {
    font-size: 0.8rem;
    transition: var(--transition-fast);
}
.nav-item:hover .nav-link i {
    transform: rotate(180deg);
}

/* Mega Menu Dropdown */
.mega-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 800px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    padding: 24px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition-normal);
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    z-index: 999;
}
.nav-item:hover .mega-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.mega-col h4 {
    color: var(--primary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}
.mega-col ul li a {
    display: block;
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--transition-fast);
    position: relative;
    padding-left: 0;
}
.mega-col ul li a::before {
    content: '›';
    position: absolute;
    left: -12px;
    opacity: 0;
    color: var(--primary);
    transition: var(--transition-fast);
}
.mega-col ul li a:hover {
    color: var(--primary);
    padding-left: 16px;
}
.mega-col ul li a:hover::before {
    left: 0;
    opacity: 1;
}

/* ---------- Hero Section ---------- */
.hero {
    position: relative;
    min-height: 500px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--darker) 0%, var(--dark) 50%, #0f0f1a 100%);
}
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(124, 58, 237, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 60% 80%, rgba(255, 107, 53, 0.05) 0%, transparent 50%);
    pointer-events: none;
}
.hero-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 60px 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}
.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--text-primary), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 500px;
}
.hero-badges {
    display: flex;
    gap: 12px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}
.hero-badge {
    padding: 8px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: var(--transition-normal);
}
.hero-badge:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}
.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: var(--radius-xl);
    font-weight: 700;
    font-size: 0.95rem;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    box-shadow: var(--glow-primary);
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.4);
}
.btn-secondary {
    background: var(--surface);
    color: var(--text-primary);
    border: 2px solid var(--border);
}
.btn-secondary:hover {
    border-color: var(--secondary);
    color: var(--secondary);
    transform: translateY(-3px);
    box-shadow: var(--glow-secondary);
}
.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: var(--transition-slow);
}
.btn:hover::before {
    left: 100%;
}

.hero-image {
    position: relative;
}
.hero-image img {
    border-radius: var(--radius-lg);
    box-shadow: 0 30px 60px rgba(0,0,0,0.5);
    transition: var(--transition-slow);
}
.hero-image:hover img {
    transform: scale(1.02) rotate(1deg);
}
.hero-image::after {
    content: '';
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100px;
    height: 100px;
    border: 3px solid var(--primary);
    border-radius: var(--radius-lg);
    opacity: 0.3;
    animation: float 6s ease-in-out infinite;
}
.hero-image::before {
    content: '';
    position: absolute;
    bottom: -20px;
    left: -20px;
    width: 80px;
    height: 80px;
    border: 3px solid var(--secondary);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 6s ease-in-out infinite reverse;
}

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

/* ---------- Features Bar ---------- */
.features-bar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 24px 0;
}
.features-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.feature-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
}
.feature-item:hover {
    background: var(--surface);
    transform: translateY(-2px);
}
.feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: white;
    flex-shrink: 0;
    transition: var(--transition-normal);
}
.feature-item:hover .feature-icon {
    transform: rotate(10deg) scale(1.1);
    box-shadow: var(--glow-primary);
}
.feature-text h4 {
    font-size: 0.95rem;
    margin-bottom: 4px;
}
.feature-text p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ---------- Section Styles ---------- */
.section {
    padding: 60px 0;
}
.section-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 40px;
}
.section-title {
    font-size: 2rem;
    font-weight: 800;
    position: relative;
    display: inline-block;
}
.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
}
.section-subtitle {
    color: var(--text-muted);
    margin-top: 16px;
    font-size: 1rem;
}
.view-all {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 8px 16px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    transition: var(--transition-normal);
}
.view-all:hover {
    background: var(--surface);
    border-color: var(--primary);
    gap: 12px;
}

/* ---------- Product Cards ---------- */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.product-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-normal);
    position: relative;
    display: flex;
    flex-direction: column;
}
.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent), var(--secondary));
    transform: scaleX(0);
    transition: var(--transition-normal);
}
.product-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-light);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4), 0 0 0 1px rgba(0, 212, 255, 0.1);
}
.product-card:hover::before {
    transform: scaleX(1);
}

.product-image {
    position: relative;
    padding: 24px;
    background: var(--darker);
    overflow: hidden;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}
.product-image img {
    max-height: 100%;
    object-fit: contain;
    transition: var(--transition-slow);
}
.product-card:hover .product-image img {
    transform: scale(1.08);
}

.product-badges {
    position: absolute;
    top: 12px;
    left: 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    z-index: 2;
}
.badge {
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
}
.badge-sale {
    background: var(--danger);
    color: white;
}
.badge-new {
    background: var(--success);
    color: white;
}
.badge-hot {
    background: var(--secondary);
    color: white;
}

.product-actions {
    position: absolute;
    top: 12px;
    right: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    opacity: 0;
    transform: translateX(10px);
    transition: var(--transition-normal);
    z-index: 2;
}
.product-card:hover .product-actions {
    opacity: 1;
    transform: translateX(0);
}
.action-btn {
    width: 36px;
    height: 36px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--transition-fast);
}
.action-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: scale(1.1);
}

.product-info {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.product-category {
    font-size: 0.8rem;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}
.product-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.4;
    transition: var(--transition-fast);
}
.product-card:hover .product-title {
    color: var(--primary);
}
.product-rating {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}
.stars {
    color: var(--warning);
    font-size: 0.85rem;
}
.rating-count {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.product-price {
    margin-top: auto;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.price-current {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--primary);
}
.price-old {
    font-size: 0.95rem;
    color: var(--text-muted);
    text-decoration: line-through;
}
.price-discount {
    padding: 2px 8px;
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 700;
}

.add-to-cart {
    margin-top: 16px;
    width: 100%;
    padding: 12px;
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-weight: 700;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition-normal);
}
.add-to-cart:hover {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-color: transparent;
    color: white;
    box-shadow: var(--glow-primary);
}

/* ---------- Category Cards (Block Style) ---------- */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}
.category-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    text-align: center;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}
.category-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 0;
    background: linear-gradient(180deg, transparent, rgba(0, 212, 255, 0.1));
    transition: var(--transition-normal);
}
.category-card:hover {
    transform: translateY(-6px);
    border-color: var(--primary);
    box-shadow: 0 15px 30px rgba(0,0,0,0.3);
}
.category-card:hover::after {
    height: 100%;
}
.category-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--surface), var(--card-bg));
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    transition: var(--transition-normal);
}
.category-card:hover .category-icon {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-color: transparent;
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--glow-primary);
}
.category-card h3 {
    font-size: 1rem;
    margin-bottom: 6px;
    transition: var(--transition-fast);
}
.category-card:hover h3 {
    color: var(--primary);
}
.category-card p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ---------- Vertical Sidebar Categories ---------- */
.sidebar-categories {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.sidebar-header {
    padding: 20px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    font-weight: 700;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}
.sidebar-list {
    padding: 8px 0;
}
.sidebar-item {
    position: relative;
}
.sidebar-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--transition-fast);
    border-left: 3px solid transparent;
}
.sidebar-link:hover {
    background: var(--surface);
    color: var(--primary);
    border-left-color: var(--primary);
    padding-left: 24px;
}
.sidebar-link i:first-child {
    margin-right: 12px;
    width: 20px;
    text-align: center;
}
.sidebar-link .count {
    background: var(--surface);
    padding: 2px 8px;
    border-radius: var(--radius-xl);
    font-size: 0.75rem;
    color: var(--text-muted);
    transition: var(--transition-fast);
}
.sidebar-link:hover .count {
    background: var(--primary);
    color: white;
}

/* Submenu for sidebar */
.sidebar-submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
    background: var(--darker);
}
.sidebar-item:hover .sidebar-submenu {
    max-height: 300px;
}
.sidebar-submenu a {
    display: block;
    padding: 10px 20px 10px 48px;
    color: var(--text-muted);
    font-size: 0.85rem;
    transition: var(--transition-fast);
}
.sidebar-submenu a:hover {
    color: var(--primary);
    padding-left: 52px;
}

/* ---------- Banner Cards ---------- */
.banner-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.banner-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-height: 280px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 28px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    transition: var(--transition-normal);
}
.banner-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}
.banner-card img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
    transition: var(--transition-slow);
}
.banner-card:hover img {
    opacity: 0.8;
    transform: scale(1.05);
}
.banner-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 30%, rgba(10,10,15,0.95) 100%);
    z-index: 1;
}
.banner-content {
    position: relative;
    z-index: 2;
}
.banner-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--secondary);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: 12px;
}
.banner-card h3 {
    font-size: 1.4rem;
    margin-bottom: 8px;
}
.banner-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

/* ---------- Two Column Layout (Sidebar + Products) ---------- */
.two-col {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 32px;
}

/* ---------- Brands ---------- */
.brands-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 16px;
}
.brand-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 80px;
    transition: var(--transition-normal);
    filter: grayscale(0.5);
    opacity: 0.7;
}
.brand-card:hover {
    filter: grayscale(0);
    opacity: 1;
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: var(--glow-primary);
}
.brand-card img {
    max-height: 40px;
    object-fit: contain;
}

/* ---------- Newsletter ---------- */
.newsletter {
    background: linear-gradient(135deg, var(--primary-dark), var(--accent));
    border-radius: var(--radius-lg);
    padding: 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.newsletter::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
    animation: rotate 20s linear infinite;
}
@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
.newsletter h2 {
    font-size: 2rem;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}
.newsletter p {
    margin-bottom: 24px;
    opacity: 0.9;
    position: relative;
    z-index: 1;
}
.newsletter-form {
    display: flex;
    gap: 12px;
    max-width: 500px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}
.newsletter-form input {
    flex: 1;
    padding: 14px 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: var(--radius-xl);
    background: rgba(255,255,255,0.1);
    color: white;
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition-normal);
}
.newsletter-form input::placeholder {
    color: rgba(255,255,255,0.6);
}
.newsletter-form input:focus {
    border-color: white;
    background: rgba(255,255,255,0.2);
}
.newsletter-form button {
    padding: 14px 28px;
    background: white;
    color: var(--accent);
    border-radius: var(--radius-xl);
    font-weight: 700;
    transition: var(--transition-normal);
}
.newsletter-form button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

/* ---------- Footer ---------- */
.footer {
    background: var(--darker);
    border-top: 1px solid var(--border);
    padding: 60px 0 0;
}
.footer-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 48px;
}
.footer-brand .logo {
    margin-bottom: 16px;
}
.footer-brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 20px;
    line-height: 1.7;
}
.social-links {
    display: flex;
    gap: 12px;
}
.social-links a {
    width: 40px;
    height: 40px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1rem;
    transition: var(--transition-normal);
}
.social-links a:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: var(--glow-primary);
}
.footer-col h4 {
    font-size: 1rem;
    margin-bottom: 20px;
    color: var(--text-primary);
    position: relative;
    padding-bottom: 10px;
}
.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}
.footer-col ul li {
    margin-bottom: 10px;
}
.footer-col ul li a {
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: var(--transition-fast);
    display: inline-block;
}
.footer-col ul li a:hover {
    color: var(--primary);
    transform: translateX(5px);
}
.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}
.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.85rem;
}
.payment-methods {
    display: flex;
    gap: 12px;
    align-items: center;
}
.payment-methods span {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ---------- Page Header ---------- */
.page-header {
    background: linear-gradient(135deg, var(--darker), var(--dark));
    padding: 48px 0;
    border-bottom: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}
.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 50%, rgba(0, 212, 255, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 70% 50%, rgba(124, 58, 237, 0.05) 0%, transparent 50%);
}
.page-header-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}
.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 8px;
}
.breadcrumbs {
    display: flex;
    gap: 8px;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}
.breadcrumbs a:hover {
    color: var(--primary);
}
.breadcrumbs span {
    color: var(--text-muted);
}

/* ---------- Filters ---------- */
.filter-bar {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}
.filter-group {
    display: flex;
    gap: 12px;
    align-items: center;
}
.filter-group label {
    color: var(--text-muted);
    font-size: 0.9rem;
}
.filter-select {
    padding: 8px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    outline: none;
    transition: var(--transition-fast);
}
.filter-select:focus {
    border-color: var(--primary);
}
.filter-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.filter-tag {
    padding: 6px 14px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    cursor: pointer;
}
.filter-tag:hover, .filter-tag.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* ---------- Pagination ---------- */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}
.pagination a, .pagination span {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-weight: 600;
    transition: var(--transition-fast);
}
.pagination a:hover {
    background: var(--surface);
    color: var(--primary);
    border-color: var(--primary);
}
.pagination .active {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    border-color: transparent;
}

/* ---------- Product Detail ---------- */
.product-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}
.product-gallery {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    position: relative;
}
.gallery-main {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}
.gallery-main img {
    max-height: 100%;
    object-fit: contain;
}
.gallery-thumbs {
    display: flex;
    gap: 12px;
    justify-content: center;
}
.gallery-thumb {
    width: 80px;
    height: 80px;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    padding: 8px;
    cursor: pointer;
    transition: var(--transition-fast);
    background: var(--darker);
}
.gallery-thumb:hover, .gallery-thumb.active {
    border-color: var(--primary);
}
.gallery-thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.product-detail-info h1 {
    font-size: 2rem;
    margin-bottom: 12px;
}
.product-detail-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.product-detail-meta span {
    color: var(--text-muted);
    font-size: 0.9rem;
}
.product-detail-meta span strong {
    color: var(--text-primary);
}
.product-detail-price {
    display: flex;
    align-items: baseline;
    gap: 16px;
    margin-bottom: 24px;
    padding: 20px;
    background: var(--card-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}
.product-detail-price .price-current {
    font-size: 2.5rem;
}
.product-detail-price .price-old {
    font-size: 1.3rem;
}

.product-variants {
    margin-bottom: 24px;
}
.product-variants h4 {
    font-size: 0.95rem;
    margin-bottom: 12px;
}
.variant-options {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.variant-option {
    padding: 10px 20px;
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}
.variant-option:hover, .variant-option.active {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(0, 212, 255, 0.1);
}

.product-quantity {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}
.qty-control {
    display: flex;
    align-items: center;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}
.qty-control button {
    width: 44px;
    height: 44px;
    background: var(--surface);
    color: var(--text-primary);
    font-size: 1.2rem;
    transition: var(--transition-fast);
}
.qty-control button:hover {
    background: var(--primary);
    color: white;
}
.qty-control input {
    width: 60px;
    height: 44px;
    text-align: center;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1rem;
    outline: none;
}

.product-detail-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
}
.product-detail-actions .btn {
    flex: 1;
    justify-content: center;
    padding: 16px 32px;
    font-size: 1rem;
}

.product-tabs {
    margin-top: 48px;
}
.tab-nav {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--border);
    margin-bottom: 24px;
}
.tab-nav button {
    padding: 14px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: var(--transition-fast);
    background: none;
}
.tab-nav button:hover, .tab-nav button.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}
.tab-content {
    display: none;
}
.tab-content.active {
    display: block;
}
.tab-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}
.specs-table {
    width: 100%;
    border-collapse: collapse;
}
.specs-table tr {
    border-bottom: 1px solid var(--border);
}
.specs-table td {
    padding: 14px 20px;
    font-size: 0.95rem;
}
.specs-table td:first-child {
    color: var(--text-muted);
    width: 30%;
}
.specs-table td:last-child {
    color: var(--text-primary);
    font-weight: 600;
}

/* ---------- Cart Page ---------- */
.cart-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 32px;
}
.cart-table th {
    text-align: left;
    padding: 16px;
    background: var(--card-bg);
    border-bottom: 2px solid var(--border);
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.cart-table td {
    padding: 20px 16px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}
.cart-product {
    display: flex;
    align-items: center;
    gap: 16px;
}
.cart-product img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    background: var(--darker);
    border-radius: var(--radius-md);
    padding: 8px;
}
.cart-product-info h4 {
    font-size: 0.95rem;
    margin-bottom: 4px;
}
.cart-product-info p {
    font-size: 0.8rem;
    color: var(--text-muted);
}
.cart-remove {
    color: var(--danger);
    font-size: 1.2rem;
    transition: var(--transition-fast);
}
.cart-remove:hover {
    transform: scale(1.2);
}

.cart-summary {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
}
.cart-summary h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}
.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    font-size: 0.95rem;
}
.summary-row.total {
    border-top: 2px solid var(--border);
    margin-top: 12px;
    padding-top: 20px;
    font-size: 1.2rem;
    font-weight: 800;
}
.summary-row.total span:last-child {
    color: var(--primary);
}
.cart-summary .btn {
    width: 100%;
    margin-top: 20px;
    justify-content: center;
}

/* ---------- Checkout ---------- */
.checkout-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 32px;
}
.checkout-form {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
}
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}
.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: var(--transition-fast);
    outline: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* ---------- Contact Page ---------- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 48px;
}
.contact-info-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-bottom: 20px;
    transition: var(--transition-normal);
}
.contact-info-card:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
}
.contact-info-card i {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    margin-bottom: 16px;
}
.contact-info-card h4 {
    margin-bottom: 8px;
}
.contact-info-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ---------- Animations ---------- */
.fade-in {
    animation: fadeIn 0.6s ease forwards;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ---------- Responsive ---------- */
@media (max-width: 1200px) {
    .two-col {
        grid-template-columns: 1fr;
    }
    .sidebar-categories {
        display: none;
    }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .hero-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-content h1 {
        font-size: 2.5rem;
    }
    .hero-badges, .hero-buttons {
        justify-content: center;
    }
    .features-inner {
        grid-template-columns: repeat(2, 1fr);
    }
    .banner-grid {
        grid-template-columns: 1fr;
    }
    .product-detail {
        grid-template-columns: 1fr;
    }
    .checkout-grid, .contact-grid {
        grid-template-columns: 1fr;
    }
    .mega-menu {
        min-width: 600px;
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header-inner {
        flex-wrap: wrap;
        gap: 16px;
    }
    .search-bar {
        order: 3;
        max-width: 100%;
        width: 100%;
    }
    .nav-list {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    .features-inner {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .mega-menu {
        position: static;
        min-width: auto;
        grid-template-columns: 1fr;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
    }
    .nav-item:hover .mega-menu {
        display: grid;
    }
}

/* ---------- Utility Classes ---------- */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.hidden { display: none; }