/* =============================================
   PRODUCTS PREMIUM STYLES - E-COMMERCE LEVEL
   Compatible with premium e-commerce standards
   Optimized for conversion and UX
   ============================================= */

/* ==========================================================================
   CSS VARIABLES - PREMIUM COLOR SYSTEM
   ========================================================================== */
:root {
    /* Primary Brand Colors */
    --aex-primary: #fd7e14;
    --aex-primary-dark: #e8650e;
    --aex-primary-light: #ffe4cc;
    --aex-primary-rgb: 253, 126, 20;
    
    /* Semantic Colors */
    --aex-success: #198754;
    --aex-success-light: #d1e7dd;
    --aex-danger: #dc3545;
    --aex-danger-light: #f8d7da;
    --aex-warning: #ffc107;
    --aex-warning-light: #fff3cd;
    --aex-info: #0dcaf0;
    --aex-info-light: #cff4fc;
    
    /* Neutral Colors */
    --aex-white: #ffffff;
    --aex-black: #000000;
    --aex-gray-50: #f8f9fa;
    --aex-gray-100: #f1f3f4;
    --aex-gray-200: #e9ecef;
    --aex-gray-300: #dee2e6;
    --aex-gray-400: #ced4da;
    --aex-gray-500: #adb5bd;
    --aex-gray-600: #6c757d;
    --aex-gray-700: #495057;
    --aex-gray-800: #343a40;
    --aex-gray-900: #212529;
    
    /* Shadows - Multiple levels */
    --aex-shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --aex-shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --aex-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --aex-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --aex-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --aex-shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Border Radius */
    --aex-radius-sm: 0.25rem;
    --aex-radius-md: 0.375rem;
    --aex-radius-lg: 0.5rem;
    --aex-radius-xl: 0.75rem;
    --aex-radius-2xl: 1rem;
    --aex-radius-3xl: 1.5rem;
    --aex-radius-full: 50%;
    
    /* Spacing Scale */
    --aex-space-1: 0.25rem;
    --aex-space-2: 0.5rem;
    --aex-space-3: 0.75rem;
    --aex-space-4: 1rem;
    --aex-space-5: 1.25rem;
    --aex-space-6: 1.5rem;
    --aex-space-8: 2rem;
    --aex-space-10: 2.5rem;
    --aex-space-12: 3rem;
    --aex-space-16: 4rem;
    --aex-space-20: 5rem;
    
    /* Transitions */
    --aex-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --aex-transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --aex-transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Typography */
    --aex-font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --aex-font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    
    /* Z-Index Scale */
    --aex-z-dropdown: 1000;
    --aex-z-sticky: 1020;
    --aex-z-fixed: 1030;
    --aex-z-modal-backdrop: 1040;
    --aex-z-modal: 1050;
    --aex-z-popover: 1060;
    --aex-z-tooltip: 1070;
    --aex-z-toast: 1080;
}

/* ==========================================================================
   ENHANCED PRODUCT GALLERY SYSTEM
   ========================================================================== */

.product-gallery-container {
    position: relative;
    background: var(--aex-white);
    border-radius: var(--aex-radius-xl);
    overflow: hidden;
    box-shadow: var(--aex-shadow-lg);
    border: 1px solid var(--aex-gray-200);
    transition: var(--aex-transition-base);
}

.product-gallery-container:hover {
    box-shadow: var(--aex-shadow-xl);
}

/* Main Image Wrapper */
.main-image-wrapper {
    position: relative;
    aspect-ratio: 1;
    background: var(--aex-gray-100);
    overflow: hidden;
    cursor: zoom-in;
}

.main-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 400ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform;
}

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

/* Image Badges */
.image-badges {
    position: absolute;
    top: var(--aex-space-4);
    left: var(--aex-space-4);
    z-index: 10;
    display: flex;
    flex-direction: column;
    gap: var(--aex-space-2);
}

.image-badges .badge {
    backdrop-filter: blur(10px);
    background: rgba(var(--aex-primary-rgb), 0.9) !important;
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-weight: 600;
    font-size: 0.75rem;
    padding: var(--aex-space-2) var(--aex-space-3);
    border-radius: var(--aex-radius-full);
    box-shadow: var(--aex-shadow-md);
    animation: badgeEntry 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes badgeEntry {
    0% {
        opacity: 0;
        transform: translateX(-20px) scale(0.8);
    }
    100% {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

/* Gallery Navigation Buttons */
.gallery-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.95);
    border: none;
    border-radius: var(--aex-radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--aex-gray-700);
    box-shadow: var(--aex-shadow-lg);
    transition: var(--aex-transition-base);
    z-index: 15;
    opacity: 0;
    visibility: hidden;
    backdrop-filter: blur(10px);
}

.product-gallery-container:hover .gallery-nav-btn {
    opacity: 1;
    visibility: visible;
}

.gallery-nav-btn:hover {
    background: var(--aex-white);
    color: var(--aex-primary);
    transform: translateY(-50%) scale(1.1);
    box-shadow: var(--aex-shadow-xl);
}

.gallery-nav-btn:active {
    transform: translateY(-50%) scale(0.95);
}

.gallery-nav-btn.prev {
    left: var(--aex-space-4);
}

.gallery-nav-btn.next {
    right: var(--aex-space-4);
}

/* Enhanced Thumbnails */
.gallery-thumbnails {
    padding: var(--aex-space-4);
    background: var(--aex-white);
    border-top: 1px solid var(--aex-gray-200);
}

.thumbnail-slider {
    display: flex;
    gap: var(--aex-space-3);
    overflow-x: auto;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: var(--aex-space-1) 0;
    scroll-snap-type: x mandatory;
}

.thumbnail-slider::-webkit-scrollbar {
    display: none;
}

.thumbnail-item {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    border: 2px solid transparent;
    border-radius: var(--aex-radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: var(--aex-transition-base);
    position: relative;
    scroll-snap-align: start;
}

.thumbnail-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0);
    transition: var(--aex-transition-base);
    z-index: 1;
}

.thumbnail-item:hover {
    border-color: var(--aex-primary);
    transform: scale(1.05);
    box-shadow: var(--aex-shadow-md);
}

.thumbnail-item:hover::before {
    background: rgba(var(--aex-primary-rgb), 0.1);
}

.thumbnail-item.active {
    border-color: var(--aex-primary);
    box-shadow: 0 0 0 2px rgba(var(--aex-primary-rgb), 0.2);
    transform: scale(1.02);
}

.thumbnail-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: var(--aex-transition-base);
}

.thumbnail-item:hover .thumbnail-img {
    transform: scale(1.1);
}

/* ==========================================================================
   ENHANCED PRODUCT INFO SECTION
   ========================================================================== */

.product-info-sticky {
    position: sticky;
    top: var(--aex-space-8);
    background: var(--aex-white);
    border-radius: var(--aex-radius-xl);
    padding: var(--aex-space-8);
    box-shadow: var(--aex-shadow-lg);
    border: 1px solid var(--aex-gray-200);
    transition: var(--aex-transition-base);
}

.product-info-sticky:hover {
    box-shadow: var(--aex-shadow-xl);
}

/* Product Brand */
.product-brand {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--aex-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--aex-space-2);
    opacity: 0.9;
}

/* Product Title */
.product-title {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 700;
    line-height: 1.2;
    color: var(--aex-gray-900);
    margin-bottom: var(--aex-space-4);
    letter-spacing: -0.02em;
}

/* Product Rating */
.product-rating {
    display: flex;
    align-items: center;
    gap: var(--aex-space-3);
    margin-bottom: var(--aex-space-6);
    padding-bottom: var(--aex-space-4);
    border-bottom: 1px solid var(--aex-gray-200);
}

.stars {
    color: #ffc107;
    font-size: 1.1rem;
    display: flex;
    gap: 1px;
}

.rating-text {
    color: var(--aex-gray-600);
    font-size: 0.9rem;
    font-weight: 500;
}

/* Enhanced Price Container */
.price-container {
    background: linear-gradient(135deg, #fff5e6 0%, #ffe4cc 100%);
    border: 2px solid var(--aex-primary-light);
    border-radius: var(--aex-radius-xl);
    padding: var(--aex-space-6);
    margin-bottom: var(--aex-space-8);
    position: relative;
    overflow: hidden;
}

.price-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--aex-primary), var(--aex-primary-dark));
}

.price-container::after {
    content: '';
    position: absolute;
    top: 10px;
    right: 20px;
    width: 60px;
    height: 60px;
    background: radial-gradient(circle, rgba(var(--aex-primary-rgb), 0.1) 0%, transparent 70%);
    border-radius: var(--aex-radius-full);
}

.current-price {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--aex-primary);
    line-height: 1;
    margin-bottom: var(--aex-space-2);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.original-price {
    font-size: 1.25rem;
    color: var(--aex-gray-600);
    text-decoration: line-through;
    margin-right: var(--aex-space-3);
    opacity: 0.8;
}

.discount-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--aex-space-1);
    background: var(--aex-danger);
    color: white;
    padding: var(--aex-space-1) var(--aex-space-3);
    border-radius: var(--aex-radius-full);
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--aex-shadow-sm);
    animation: pulse 2s infinite;
}

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

/* Enhanced Availability Status */
.availability-status {
    display: flex;
    align-items: center;
    gap: var(--aex-space-4);
    padding: var(--aex-space-5);
    background: var(--aex-gray-50);
    border-radius: var(--aex-radius-lg);
    margin-bottom: var(--aex-space-8);
    border: 1px solid var(--aex-gray-200);
}

.availability-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--aex-radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    box-shadow: var(--aex-shadow-sm);
}

.availability-icon.in-stock {
    background: linear-gradient(135deg, var(--aex-success) 0%, #0f5132 100%);
}

.availability-icon.out-stock {
    background: linear-gradient(135deg, var(--aex-danger) 0%, #842029 100%);
}

.availability-icon.limited {
    background: linear-gradient(135deg, var(--aex-warning) 0%, #997404 100%);
}

/* ==========================================================================
   ENHANCED CTA BUTTONS
   ========================================================================== */

.cta-buttons {
    display: flex;
    gap: var(--aex-space-4);
    margin-bottom: var(--aex-space-8);
}

.btn-primary-cta {
    flex: 2;
    background: linear-gradient(135deg, var(--aex-primary) 0%, var(--aex-primary-dark) 100%);
    border: none;
    border-radius: var(--aex-radius-lg);
    padding: var(--aex-space-5) var(--aex-space-6);
    font-size: 1.1rem;
    font-weight: 700;
    color: white;
    transition: var(--aex-transition-base);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 68px;
    box-shadow: var(--aex-shadow-md);
}

.btn-primary-cta::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: left 0.6s;
}

.btn-primary-cta:hover::before {
    left: 100%;
}

.btn-primary-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--aex-shadow-xl);
    color: white;
    text-decoration: none;
}

.btn-primary-cta:active {
    transform: translateY(0);
}

.btn-secondary-cta {
    flex: 1;
    background: transparent;
    border: 2px solid var(--aex-primary);
    border-radius: var(--aex-radius-lg);
    padding: var(--aex-space-4) var(--aex-space-5);
    font-size: 1rem;
    font-weight: 600;
    color: var(--aex-primary);
    transition: var(--aex-transition-base);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--aex-space-2);
    min-height: 68px;
}

.btn-secondary-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: var(--aex-primary);
    transition: width var(--aex-transition-base);
    z-index: -1;
}

.btn-secondary-cta:hover::before {
    width: 100%;
}

.btn-secondary-cta:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--aex-shadow-lg);
}

/* ==========================================================================
   ENHANCED ACCORDION SYSTEM
   ========================================================================== */

.product-accordion {
    margin-top: var(--aex-space-6);
}

.product-accordion .accordion-item {
    border: none;
    border-radius: var(--aex-radius-lg);
    margin-bottom: var(--aex-space-3);
    box-shadow: var(--aex-shadow-sm);
    overflow: hidden;
    transition: var(--aex-transition-base);
}

.product-accordion .accordion-item:hover {
    box-shadow: var(--aex-shadow-md);
}

.product-accordion .accordion-button {
    background: var(--aex-gray-50);
    border: none;
    color: var(--aex-gray-900);
    font-weight: 600;
    padding: var(--aex-space-5) var(--aex-space-6);
    border-radius: var(--aex-radius-lg);
    transition: var(--aex-transition-base);
    position: relative;
}

.product-accordion .accordion-button::after {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23fd7e14'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
    transition: transform var(--aex-transition-base);
}

.product-accordion .accordion-button:not(.collapsed) {
    background: var(--aex-primary-light);
    color: var(--aex-primary-dark);
    box-shadow: none;
}

.product-accordion .accordion-button:not(.collapsed)::after {
    transform: rotate(180deg);
}

.product-accordion .accordion-button:focus {
    box-shadow: 0 0 0 0.25rem rgba(var(--aex-primary-rgb), 0.25);
    border: none;
}

.product-accordion .accordion-body {
    padding: var(--aex-space-6);
    background: var(--aex-white);
}

/* Payment Methods */
.payment-method {
    display: flex;
    align-items: center;
    gap: var(--aex-space-4);
    padding: var(--aex-space-4);
    border: 1px solid var(--aex-gray-200);
    border-radius: var(--aex-radius-lg);
    margin-bottom: var(--aex-space-3);
    transition: var(--aex-transition-base);
    cursor: pointer;
}

.payment-method:hover {
    border-color: var(--aex-primary);
    background: var(--aex-primary-light);
    transform: translateY(-1px);
    box-shadow: var(--aex-shadow-sm);
}

.payment-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--aex-radius-lg);
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
    box-shadow: var(--aex-shadow-sm);
}

.payment-icon.bg-success {
    background: linear-gradient(135deg, var(--aex-success) 0%, #0f5132 100%);
}

.payment-icon.bg-primary {
    background: linear-gradient(135deg, var(--aex-primary) 0%, var(--aex-primary-dark) 100%);
}

.payment-icon.bg-warning {
    background: linear-gradient(135deg, var(--aex-warning) 0%, #997404 100%);
}

.payment-icon.bg-info {
    background: linear-gradient(135deg, var(--aex-info) 0%, #055160 100%);
}

/* ==========================================================================
   PRODUCT DETAILS GRID
   ========================================================================== */

.product-details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--aex-space-4);
    margin-bottom: var(--aex-space-8);
}

.detail-card {
    background: var(--aex-gray-50);
    border-radius: var(--aex-radius-lg);
    padding: var(--aex-space-5);
    text-align: center;
    transition: var(--aex-transition-base);
    border: 1px solid var(--aex-gray-200);
    position: relative;
    overflow: hidden;
}

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

.detail-card:hover {
    background: var(--aex-primary-light);
    transform: translateY(-3px);
    box-shadow: var(--aex-shadow-md);
}

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

.detail-icon {
    font-size: 2.5rem;
    color: var(--aex-primary);
    margin-bottom: var(--aex-space-3);
    transition: var(--aex-transition-base);
}

.detail-card:hover .detail-icon {
    transform: scale(1.1);
}

.detail-label {
    font-size: 0.875rem;
    color: var(--aex-gray-600);
    margin-bottom: var(--aex-space-1);
    font-weight: 500;
}

.detail-value {
    font-weight: 700;
    color: var(--aex-gray-900);
    font-size: 1rem;
}

/* ==========================================================================
   ENHANCED LIGHTBOX
   ========================================================================== */

.product-lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: var(--aex-z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--aex-transition-base);
    backdrop-filter: blur(20px);
}

.product-lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-image {
    max-width: 100%;
    max-height: 100%;
    border-radius: var(--aex-radius-xl);
    box-shadow: var(--aex-shadow-2xl);
    object-fit: contain;
}

.lightbox-close {
    position: absolute;
    top: var(--aex-space-4);
    right: var(--aex-space-4);
    width: 48px;
    height: 48px;
    background: rgba(0, 0, 0, 0.8);
    border: none;
    border-radius: var(--aex-radius-full);
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--aex-transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.lightbox-close:hover {
    background: rgba(0, 0, 0, 0.9);
    transform: scale(1.1);
}

/* ==========================================================================
   TRUST INDICATORS
   ========================================================================== */

.trust-indicators {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--aex-space-4);
    margin-top: var(--aex-space-8);
    padding: var(--aex-space-6);
    background: var(--aex-gray-50);
    border-radius: var(--aex-radius-xl);
    border: 1px solid var(--aex-gray-200);
}

.trust-item {
    text-align: center;
    padding: var(--aex-space-3);
    transition: var(--aex-transition-base);
    border-radius: var(--aex-radius-lg);
}

.trust-item:hover {
    background: var(--aex-white);
    transform: translateY(-2px);
    box-shadow: var(--aex-shadow-sm);
}

.trust-icon {
    font-size: 2rem;
    margin-bottom: var(--aex-space-2);
    display: block;
}

.trust-text {
    font-size: 0.875rem;
    color: var(--aex-gray-600);
    font-weight: 600;
    line-height: 1.4;
}

/* ==========================================================================
   TRUST BAR
   ========================================================================== */

.trust-bar {
    background: linear-gradient(135deg, var(--aex-gray-900) 0%, var(--aex-gray-800) 100%);
    border-bottom: 1px solid var(--aex-gray-700);
}

.trust-bar small {
    font-weight: 500;
    font-size: 0.8rem;
}

.trust-bar i {
    color: var(--aex-primary);
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

@media (max-width: 1024px) {
    .product-info-sticky {
        position: static;
        margin-top: var(--aex-space-8);
    }
    
    .product-details-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: var(--aex-space-3);
    }
}

@media (max-width: 768px) {
    :root {
        --aex-space-8: 1.5rem;
        --aex-space-6: 1.25rem;
        --aex-space-5: 1rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        gap: var(--aex-space-3);
    }

    .btn-primary-cta,
    .btn-secondary-cta {
        flex: none;
        min-height: 56px;
    }

    .current-price {
        font-size: 2rem;
    }

    .thumbnail-slider {
        gap: var(--aex-space-2);
    }

    .thumbnail-item {
        width: 60px;
        height: 60px;
    }

    .gallery-nav-btn {
        width: 40px;
        height: 40px;
    }

    .gallery-nav-btn.prev {
        left: var(--aex-space-2);
    }

    .gallery-nav-btn.next {
        right: var(--aex-space-2);
    }

    .product-details-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--aex-space-2);
    }

    .detail-card {
        padding: var(--aex-space-3);
    }

    .detail-icon {
        font-size: 1.75rem;
    }

    .trust-indicators {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--aex-space-2);
        padding: var(--aex-space-4);
    }

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

    .payment-method {
        flex-direction: column;
        text-align: center;
        gap: var(--aex-space-2);
    }

    .payment-icon {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
    }
}

@media (max-width: 576px) {
    .product-gallery-container {
        border-radius: var(--aex-radius-lg);
    }

    .price-container {
        padding: var(--aex-space-4);
    }

    .current-price {
        font-size: 1.75rem;
    }

    .thumbnail-item {
        width: 50px;
        height: 50px;
    }

    .product-details-grid {
        grid-template-columns: 1fr;
    }

    .trust-indicators {
        grid-template-columns: 1fr;
    }

    .product-accordion .accordion-button {
        padding: var(--aex-space-4);
        font-size: 0.9rem;
    }

    .product-accordion .accordion-body {
        padding: var(--aex-space-4);
    }
}

/* ==========================================================================
   ANIMATION UTILITIES
   ========================================================================== */

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

.slide-up {
    animation: slideUp 0.6s ease-out;
}

.scale-in {
    animation: scaleIn 0.4s ease-out;
}

@keyframes fadeIn {
    from { 
        opacity: 0; 
    }
    to { 
        opacity: 1; 
    }
}

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(30px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from { 
        opacity: 0;
        transform: scale(0.9);
    }
    to { 
        opacity: 1;
        transform: scale(1);
    }
}

/* Stagger animations */
.fade-in:nth-child(1) { animation-delay: 0.1s; }
.fade-in:nth-child(2) { animation-delay: 0.2s; }
.fade-in:nth-child(3) { animation-delay: 0.3s; }
.fade-in:nth-child(4) { animation-delay: 0.4s; }
.fade-in:nth-child(5) { animation-delay: 0.5s; }
.fade-in:nth-child(6) { animation-delay: 0.6s; }

/* ==========================================================================
   LOADING STATES
   ========================================================================== */

.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* ==========================================================================
   ACCESSIBILITY IMPROVEMENTS
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

@media (prefers-contrast: high) {
    .payment-method,
    .detail-card,
    .accordion-item {
        border-width: 2px !important;
        border-color: currentColor !important;
    }
    
    .btn-primary-cta,
    .btn-secondary-cta {
        border-width: 2px !important;
    }
}

/* Focus states for keyboard navigation */
.gallery-nav-btn:focus,
.thumbnail-item:focus,
.btn-primary-cta:focus,
.btn-secondary-cta:focus,
.lightbox-close:focus {
    outline: 2px solid var(--aex-primary);
    outline-offset: 2px;
}

.thumbnail-item:focus {
    border-color: var(--aex-primary);
    box-shadow: 0 0 0 3px rgba(var(--aex-primary-rgb), 0.3);
}

/* ==========================================================================
   PRINT STYLES
   ========================================================================== */

@media print {
    .gallery-nav-btn,
    .trust-bar,
    .cta-buttons,
    .product-accordion,
    .thumbnail-slider {
        display: none !important;
    }
    
    .product-gallery-container,
    .product-info-sticky,
    .detail-card {
        border: 1px solid #000 !important;
        box-shadow: none !important;
        page-break-inside: avoid;
    }
    
    .main-image {
        max-height: 400px;
        object-fit: contain;
    }
    
    .current-price {
        color: #000 !important;
    }
}

/* ==========================================================================
   DARK MODE SUPPORT (Future-proofing)
   ========================================================================== */

@media (prefers-color-scheme: dark) {
    :root {
        --aex-white: #1a1a1a;
        --aex-gray-50: #2a2a2a;
        --aex-gray-100: #3a3a3a;
        --aex-gray-200: #4a4a4a;
        --aex-gray-900: #f5f5f5;
    }
    
    .product-gallery-container,
    .product-info-sticky,
    .detail-card {
        background: var(--aex-gray-50);
        border-color: var(--aex-gray-200);
    }
    
    .price-container {
        background: linear-gradient(135deg, rgba(253, 126, 20, 0.1) 0%, rgba(253, 126, 20, 0.05) 100%);
    }
}

/* ==========================================================================
   PERFORMANCE OPTIMIZATIONS
   ========================================================================== */

.main-image,
.thumbnail-img,
.lightbox-image {
    will-change: transform;
    backface-visibility: hidden;
}

.product-gallery-container,
.product-info-sticky {
    contain: layout style paint;
}

/* Hardware acceleration for smooth animations */
.gallery-nav-btn,
.thumbnail-item,
.btn-primary-cta,
.btn-secondary-cta,
.detail-card {
    transform: translateZ(0);
}

/* ==========================================================================
   COMPONENT STATES
   ========================================================================== */

.btn-primary-cta:disabled,
.btn-secondary-cta:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary-cta:disabled:hover,
.btn-secondary-cta:disabled:hover {
    transform: none !important;
    box-shadow: var(--aex-shadow-md) !important;
}

/* Empty states */
.no-images {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    background: var(--aex-gray-100);
    color: var(--aex-gray-600);
    border-radius: var(--aex-radius-xl);
}

/* Error states */
.image-error {
    background: var(--aex-gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--aex-gray-500);
    font-size: 0.875rem;
}

/* Success states */
.success-state {
    border-color: var(--aex-success) !important;
    background: var(--aex-success-light) !important;
}

/* ==========================================================================
   MICRO-INTERACTIONS
   ========================================================================== */

.btn-primary-cta,
.btn-secondary-cta {
    position: relative;
    overflow: hidden;
}

.btn-primary-cta::after,
.btn-secondary-cta::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s;
}

.btn-primary-cta:active::after,
.btn-secondary-cta:active::after {
    width: 300px;
    height: 300px;
}

/* ==========================================================================
   FINAL OPTIMIZATIONS
   ========================================================================== */

/* Smooth scrolling for anchor links */
html {
    scroll-behavior: smooth;
}

/* Optimize font rendering */
body {
    font-family: var(--aex-font-family);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Optimize image rendering */
img {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

/* Container queries for future-proofing */
@container (max-width: 768px) {
    .product-details-grid {
        grid-template-columns: 1fr;
    }
}