/* ==========================================================================
   NEXVOLT PREMIUM DESIGN SYSTEM & CUSTOM VARIABLES
   ========================================================================== */
:root {
    /* Fonts */
    --font-heading: 'Orbitron', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Transition Speeds */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* Shadows & Glows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.4);
    
    /* Layout */
    --header-height: 80px;
    --container-width: 1280px;
}

/* Dark Theme Colors (Default) */
[data-theme="dark"] {
    --bg-primary: #08090d;
    --bg-secondary: #0f1118;
    --surface-card: #151824;
    --surface-card-hover: #1e2233;
    --surface-nav: rgba(15, 17, 24, 0.75);
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --accent-cyan: #00f0ff;
    --accent-blue: #0052ff;
    --accent-blue-rgb: 0, 82, 255;
    --accent-cyan-rgb: 0, 240, 255;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-hover: rgba(255, 255, 255, 0.15);
    
    --glow-primary: 0 0 20px rgba(0, 82, 255, 0.3);
    --glow-secondary: 0 0 20px rgba(0, 240, 255, 0.4);
    --glass-bg: rgba(21, 24, 36, 0.4);
    --scrollbar-track: #0c0d12;
    --scrollbar-thumb: #222638;
}

/* Light Theme Colors */
[data-theme="light"] {
    --bg-primary: #f9fafb;
    --bg-secondary: #f3f4f6;
    --surface-card: #ffffff;
    --surface-card-hover: #fcfcfd;
    --surface-nav: rgba(255, 255, 255, 0.8);
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    
    --accent-cyan: #0284c7;
    --accent-blue: #2563eb;
    --accent-blue-rgb: 37, 99, 235;
    --accent-cyan-rgb: 2, 132, 199;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-color-hover: rgba(0, 0, 0, 0.15);
    
    --glow-primary: 0 4px 12px rgba(37, 99, 235, 0.15);
    --glow-secondary: 0 4px 12px rgba(2, 132, 199, 0.2);
    --glass-bg: rgba(255, 255, 255, 0.6);
    --scrollbar-track: #f1f1f1;
    --scrollbar-thumb: #c1c1c1;
}

/* ==========================================================================
   CSS BASE & RESET
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

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

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

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

button, input, select {
    font-family: inherit;
    color: inherit;
    background: none;
    border: none;
    outline: none;
}

button {
    cursor: pointer;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}
::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-blue);
}

/* Global Utilities */
.text-cyan { color: var(--accent-cyan); }
.text-blue { color: var(--accent-blue); }
.gradient-text {
    background: linear-gradient(135deg, #ffffff 0%, var(--accent-cyan) 50%, var(--accent-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
[data-theme="light"] .gradient-text {
    background: linear-gradient(135deg, #111827 0%, var(--accent-blue) 50%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================================================
   TOP BANNER
   ========================================================================== */
.top-banner {
    background: linear-gradient(90deg, var(--accent-blue) 0%, #050b18 50%, var(--accent-cyan) 100%);
    color: #ffffff;
    font-size: 13px;
    font-weight: 500;
    text-align: center;
    padding: 8px 16px;
    letter-spacing: 0.5px;
    position: relative;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 240, 255, 0.1);
}

/* ==========================================================================
   HEADER NAVIGATION
   ========================================================================== */
.main-header {
    height: var(--header-height);
    background-color: var(--surface-nav);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 90;
    transition: background-color var(--transition-normal), border var(--transition-normal);
}

.header-container {
    max-width: var(--container-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo Design */
.logo {
    display: flex;
    align-items: center;
    font-family: var(--font-heading);
    font-weight: 900;
    font-size: 26px;
    letter-spacing: 2px;
}

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

.logo-accent {
    color: var(--accent-cyan);
    position: relative;
    text-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
}

.logo-accent::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background-color: var(--accent-blue);
    border-radius: 50%;
    bottom: 4px;
    right: -10px;
    box-shadow: 0 0 8px var(--accent-blue);
}

/* Desktop Nav Links */
.nav-links {
    display: flex;
    gap: 36px;
}

.nav-link {
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 8px 0;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
    transition: width var(--transition-normal);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

/* Header Action Buttons */
.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.theme-toggle-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    background: var(--glass-bg);
    font-size: 16px;
    transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

/* Toggle Sun/Moon display depending on active theme */
[data-theme="dark"] .icon-light { display: none; }
[data-theme="dark"] .icon-dark { display: block; color: var(--accent-cyan); }
[data-theme="light"] .icon-light { display: block; color: #f59e0b; }
[data-theme="light"] .icon-dark { display: none; }

.cart-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    background: var(--glass-bg);
    font-size: 18px;
    position: relative;
    transition: all var(--transition-fast);
}

.cart-btn:hover {
    border-color: var(--accent-blue);
    box-shadow: 0 0 10px rgba(0, 82, 255, 0.3);
    transform: translateY(-2px);
}

.cart-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    color: #ffffff;
    font-size: 11px;
    font-weight: 700;
    min-width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--bg-primary);
    box-shadow: 0 0 8px rgba(0, 240, 255, 0.4);
}

.mobile-menu-btn {
    display: none;
    font-size: 20px;
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    border-radius: 6px;
}

/* Mobile Nav Drawer */
.mobile-nav {
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100vh;
    background-color: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    z-index: 100;
    padding: 40px 30px;
    display: flex;
    flex-direction: column;
    gap: 30px;
    transition: right var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.mobile-nav.open {
    right: 0;
}

.mobile-nav-close {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 20px;
    color: var(--text-secondary);
}

.mobile-logo {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 900;
}

.mobile-logo span {
    color: var(--accent-cyan);
}

.mobile-links {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.mobile-link {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 8px 0;
}

.mobile-link.active, .mobile-link:hover {
    color: var(--accent-cyan);
}

/* ==========================================================================
   BUTTONS STYLING
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 8px;
    letter-spacing: 0.5px;
    transition: all var(--transition-normal);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
    color: #ffffff;
    box-shadow: var(--glow-primary);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 100%);
    opacity: 0;
    z-index: -1;
    transition: opacity var(--transition-normal);
}

.btn-primary:hover {
    box-shadow: 0 0 25px rgba(0, 240, 255, 0.4);
    transform: translateY(-2px);
}

.btn-primary:hover::before {
    opacity: 1;
}

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

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--text-secondary);
    transform: translateY(-2px);
}

.btn-block {
    display: flex;
    width: 100%;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
    padding: 80px 0;
    position: relative;
    overflow: hidden;
    background: radial-gradient(circle at 80% 20%, rgba(var(--accent-blue-rgb), 0.08) 0%, transparent 60%);
}

.hero-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 40px;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.hero-badge {
    background: rgba(var(--accent-cyan-rgb), 0.1);
    color: var(--accent-cyan);
    border: 1px solid rgba(var(--accent-cyan-rgb), 0.25);
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 24px;
    text-transform: uppercase;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 56px;
    font-weight: 900;
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 24px;
}

.hero-description {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 36px;
    max-width: 520px;
}

.hero-cta-group {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    width: 100%;
}

.hero-stats {
    display: flex;
    gap: 48px;
    border-top: 1px solid var(--border-color);
    padding-top: 32px;
    width: 100%;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-lbl {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 4px;
}

/* Hero Visual & Glowing Backgrounds */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.glow-bg {
    position: absolute;
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, rgba(var(--accent-cyan-rgb), 0.15) 0%, rgba(var(--accent-blue-rgb), 0.05) 50%, transparent 70%);
    filter: blur(40px);
    z-index: -1;
    animation: pulseGlow 8s infinite alternate;
}

@keyframes pulseGlow {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(1.15); opacity: 1; }
}

.hero-image {
    width: 100%;
    max-width: 460px;
    height: auto;
    filter: drop-shadow(0 15px 35px rgba(0, 0, 0, 0.5));
    animation: floatImage 6s ease-in-out infinite;
}

@keyframes floatImage {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
    100% { transform: translateY(0px); }
}

/* ==========================================================================
   FEATURES BAR
   ========================================================================== */
.features-bar {
    padding: 60px 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-normal);
}

.features-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(var(--accent-blue-rgb), 0.1), rgba(var(--accent-cyan-rgb), 0.1));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    font-size: 20px;
    margin-bottom: 16px;
    border: 1px solid rgba(var(--accent-cyan-rgb), 0.2);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.05);
}

.feature-card h3 {
    font-family: var(--font-heading);
    font-size: 16px;
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}

.feature-card p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ==========================================================================
   FEATURED PRODUCT HIGHLIGHT SECTION
   ========================================================================== */
.featured-product {
    padding: 100px 0;
    background: radial-gradient(circle at 15% 70%, rgba(var(--accent-cyan-rgb), 0.05) 0%, transparent 55%);
}

.featured-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    align-items: center;
    gap: 60px;
}

.featured-visual {
    position: relative;
    display: flex;
    justify-content: center;
}

.glowing-circle {
    position: absolute;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(var(--accent-cyan-rgb), 0.12) 0%, transparent 70%);
    z-index: -1;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: inset 0 0 50px rgba(0, 240, 255, 0.1);
}

.featured-image {
    max-width: 380px;
    filter: drop-shadow(0 10px 25px rgba(0, 0, 0, 0.4));
    transition: transform var(--transition-normal);
}

.featured-image:hover {
    transform: scale(1.03) rotate(-2deg);
}

.label-accent {
    color: var(--accent-cyan);
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    display: inline-block;
    margin-bottom: 16px;
}

.featured-content h2 {
    font-family: var(--font-heading);
    font-size: 38px;
    line-height: 1.25;
    margin-bottom: 20px;
}

.featured-desc {
    color: var(--text-secondary);
    margin-bottom: 28px;
    font-size: 15px;
}

.featured-specs {
    list-style: none;
    margin-bottom: 36px;
}

.featured-specs li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 14px;
}

.featured-specs li i {
    font-size: 14px;
}

/* ==========================================================================
   PRODUCT CATALOG SECTION
   ========================================================================== */
.products-section {
    padding: 80px 0;
    border-top: 1px solid var(--border-color);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 50px auto;
    padding: 0 24px;
}

.section-subtitle {
    color: var(--accent-cyan);
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    display: block;
    margin-bottom: 12px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 36px;
    margin-bottom: 16px;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 15px;
}

/* Filter Tab Options and Search Input */
.filter-panel {
    max-width: var(--container-width);
    margin: 0 auto 40px auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.filter-tabs {
    display: flex;
    gap: 10px;
    background: var(--bg-secondary);
    padding: 6px;
    border-radius: 50px;
    border: 1px solid var(--border-color);
    transition: background var(--transition-normal);
}

.filter-tab {
    padding: 10px 24px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 50px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.filter-tab:hover {
    color: var(--text-primary);
}

.filter-tab.active {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    color: #ffffff;
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 18px;
    width: 320px;
    position: relative;
    transition: all var(--transition-fast);
}

.search-box:focus-within {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.15);
}

.search-icon {
    color: var(--text-muted);
    margin-right: 10px;
    font-size: 14px;
}

.search-box input {
    width: 100%;
    font-size: 14px;
    background: none;
    border: none;
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.clear-search-btn {
    color: var(--text-muted);
    font-size: 14px;
    padding: 2px;
}

.clear-search-btn:hover {
    color: var(--text-primary);
}

/* Grid of Product Cards */
.products-grid {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    min-height: 350px;
}

/* Loading & Empty States */
.loading-state, .empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 0;
    color: var(--text-secondary);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--accent-cyan);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.empty-state i {
    font-size: 48px;
    color: var(--text-muted);
    margin-bottom: 20px;
}

/* Product Card Component */
.product-card {
    background-color: var(--surface-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: all var(--transition-normal);
}

.product-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-cyan);
    box-shadow: var(--shadow-lg), 0 0 15px rgba(0, 240, 255, 0.1);
    background-color: var(--surface-card-hover);
}

.product-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    color: #ffffff;
    font-size: 10px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 10;
    box-shadow: 0 2px 8px rgba(0, 240, 255, 0.25);
}

.product-image-container {
    height: 240px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.02) 0%, rgba(0, 0, 0, 0.1) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
    padding: 24px;
}

.product-card-image {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
    transition: transform var(--transition-normal);
}

.product-card:hover .product-card-image {
    transform: scale(1.08);
}

/* Quick View Hover Action Overlay */
.product-quick-view {
    position: absolute;
    bottom: -50px;
    left: 0;
    width: 100%;
    padding: 12px;
    background: rgba(var(--accent-blue-rgb), 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: #ffffff;
    text-align: center;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: bottom var(--transition-normal);
    z-index: 12;
}

.product-card:hover .product-quick-view {
    bottom: 0;
}

.product-info {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.product-category {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 6px;
}

.product-title {
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--text-primary);
    line-height: 1.4;
}

.product-desc-compact {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: #f59e0b; /* Golden star */
    margin-top: auto;
    margin-bottom: 12px;
}

.product-rating span {
    color: var(--text-muted);
    margin-left: 6px;
}

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
}

.product-price {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 20px;
    color: var(--text-primary);
}

.add-to-cart-quick {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    box-shadow: 0 2px 8px rgba(0, 82, 255, 0.2);
    transition: all var(--transition-fast);
}

.add-to-cart-quick:hover {
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
    transform: scale(1.05);
}

/* ==========================================================================
   SHOPPING CART DRAWER (SIDEBAR SLIDE-IN)
   ========================================================================== */
.cart-drawer {
    position: fixed;
    top: 0;
    right: -420px;
    width: 420px;
    height: 100vh;
    background-color: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    z-index: 110;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    transition: right var(--transition-normal);
}

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

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

.cart-header h3 {
    font-family: var(--font-heading);
    font-size: 18px;
    letter-spacing: 0.5px;
}

.close-cart-btn {
    font-size: 18px;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.cart-items {
    flex-grow: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Empty Cart State */
.empty-cart-message {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    gap: 16px;
}

.empty-icon {
    font-size: 48px;
    color: var(--text-muted);
}

/* Cart Item Card Component */
.cart-item {
    display: flex;
    gap: 16px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

.cart-item-img {
    width: 70px;
    height: 70px;
    border-radius: 8px;
    background: var(--surface-card);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
}

.cart-item-img img {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
}

.cart-item-details {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.cart-item-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
    padding-right: 20px;
}

.cart-item-desc {
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.cart-item-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Quantity Adjuster */
.quantity-adjuster {
    display: flex;
    align-items: center;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    background: var(--bg-primary);
}

.qty-btn {
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    color: var(--text-secondary);
    transition: background var(--transition-fast);
}

.qty-btn:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}

.qty-val {
    font-size: 12px;
    font-weight: 600;
    width: 30px;
    text-align: center;
}

.cart-item-price {
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 700;
}

.remove-cart-item-btn {
    position: absolute;
    top: 0;
    right: 0;
    font-size: 14px;
    color: var(--text-muted);
}

.remove-cart-item-btn:hover {
    color: #ef4444; /* Alert Red */
}

/* Cart Footer Checkout Actions */
.cart-footer {
    padding: 24px;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.cart-summary-row {
    display: flex;
    justify-content: space-between;
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 8px;
}

.shipping-row {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.cart-subtotal {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 700;
    color: var(--accent-cyan);
}

.cart-promo-code {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.cart-promo-code input {
    flex-grow: 1;
    font-size: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 12px;
    background: var(--bg-primary);
}

.cart-promo-code button {
    padding: 8px 16px;
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
}

.cart-promo-code button:hover {
    border-color: var(--text-secondary);
}

.secure-checkout-text {
    font-size: 11px;
    color: var(--text-muted);
    text-align: center;
    margin-top: 12px;
}

.secure-checkout-text i {
    margin-right: 4px;
}

/* Drawer Backdrop Overlay */
.drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 95;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.drawer-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* ==========================================================================
   PRODUCT DETAIL MODAL POPUP
   ========================================================================== */
.product-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    z-index: 120;
    box-shadow: var(--shadow-lg), 0 0 30px rgba(0, 240, 255, 0.1);
    opacity: 0;
    pointer-events: none;
    overflow-y: auto;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.product-modal.open {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
    pointer-events: auto;
}

.close-modal-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 20px;
    color: var(--text-secondary);
    z-index: 10;
    transition: color var(--transition-fast);
}

.close-modal-btn:hover {
    color: var(--accent-cyan);
}

.modal-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 480px;
}

.modal-visual {
    background: radial-gradient(circle, rgba(255, 255, 255, 0.02) 0%, rgba(0, 0, 0, 0.1) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    border-right: 1px solid var(--border-color);
}

.modal-visual img {
    max-height: 320px;
    filter: drop-shadow(0 15px 30px rgba(0, 0, 0, 0.35));
}

.modal-content {
    padding: 40px;
    display: flex;
    flex-direction: column;
}

.modal-category {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.modal-title {
    font-family: var(--font-heading);
    font-size: 26px;
    line-height: 1.3;
    margin-bottom: 12px;
}

.modal-rating {
    font-size: 13px;
    color: #f59e0b;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.modal-rating span {
    color: var(--text-muted);
    margin-left: 6px;
}

.modal-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.modal-specs-title {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.modal-specs-list {
    list-style: none;
    margin-bottom: 30px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.modal-specs-list li {
    font-size: 13px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-specs-list li i {
    font-size: 12px;
    color: var(--accent-cyan);
}

.modal-footer {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
}

.modal-price {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-grow: 1;
}

.modal-qty-select {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 8px;
    background: var(--bg-primary);
    font-size: 14px;
    font-weight: 600;
}

/* ==========================================================================
   TOAST NOTIFICATION
   ========================================================================== */
.notification-toast {
    position: fixed;
    bottom: -100px;
    right: 30px;
    background: var(--surface-card);
    border-left: 4px solid var(--accent-cyan);
    border-radius: 8px;
    padding: 16px 24px;
    z-index: 130;
    box-shadow: var(--shadow-lg), 0 0 15px rgba(0, 240, 255, 0.1);
    transition: bottom var(--transition-normal);
    max-width: 360px;
}

.notification-toast.active {
    bottom: 30px;
}

.toast-content {
    display: flex;
    align-items: center;
    gap: 16px;
}

.toast-icon {
    font-size: 24px;
    color: var(--accent-cyan);
}

.toast-text {
    display: flex;
    flex-direction: column;
}

.toast-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

.toast-desc {
    font-size: 12px;
    color: var(--text-secondary);
}

/* ==========================================================================
   FOOTER SECTION
   ========================================================================== */
.main-footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 80px 0 30px 0;
    transition: background-color var(--transition-normal);
}

.footer-grid {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px 60px 24px;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr 0.8fr 1.2fr;
    gap: 40px;
}

.footer-brand-column {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
}

.brand-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-links a {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.social-links a:hover {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 8px rgba(0, 240, 255, 0.2);
}

.footer-links-column h4, .footer-newsletter-column h4 {
    font-family: var(--font-heading);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 24px;
}

.footer-links-column ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links-column ul a {
    font-size: 13px;
    color: var(--text-secondary);
}

.footer-links-column ul a:hover {
    color: var(--accent-cyan);
    padding-left: 4px;
}

.footer-newsletter-column p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.newsletter-form {
    display: flex;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    padding: 4px;
    transition: border-color var(--transition-fast);
}

.newsletter-form:focus-within {
    border-color: var(--accent-cyan);
}

.newsletter-form input {
    flex-grow: 1;
    padding: 10px 14px;
    font-size: 13px;
    border: none;
    background: none;
}

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

.newsletter-form button {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

.form-feedback {
    font-size: 11px;
    margin-top: 8px;
    font-weight: 500;
}

.form-feedback.success {
    color: #10b981; /* Green success */
}

.form-feedback.error {
    color: #ef4444; /* Red error */
}

.footer-bottom {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 30px 24px 0 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-muted);
    flex-wrap: wrap;
    gap: 20px;
}

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

.footer-bottom-links a:hover {
    color: var(--text-secondary);
}

/* ==========================================================================
   RESPONSIVE MEDIA QUERIES
   ========================================================================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 46px;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .featured-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .featured-visual {
        order: -1;
    }
    
    .featured-specs {
        display: inline-block;
        text-align: left;
    }
}

@media (max-width: 768px) {
    .main-header {
        height: 70px;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .hero-content {
        align-items: center;
    }
    
    .hero-cta-group {
        justify-content: center;
        flex-direction: column;
    }
    
    .hero-stats {
        justify-content: center;
        gap: 32px;
    }
    
    .features-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .filter-panel {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box {
        width: 100%;
    }
    
    .modal-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-visual {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 30px;
    }
    
    .modal-content {
        padding: 30px;
    }
    
    .cart-drawer {
        width: 100%;
        right: -100%;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 36px;
    }
    
    .features-container {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}