:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --accent-color: #4cc9f0;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --success-color: #4bb543;
    --warning-color: #fca311;
    --danger-color: #dc3545;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --app-radius: 12px;
    --app-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --app-transition: all 0.3s ease;
}

/* Product Gallery */
.product-gallery-container {
    border-radius: var(--app-radius);
    background: var(--light-color);
    box-shadow: var(--app-shadow);
}

.main-image-wrapper {
    border: 2px solid transparent;
    transition: var(--app-transition);
}

.main-image-wrapper:hover {
    border-color: var(--primary-color);
}

.product-badge-trending {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    z-index: 10;
    box-shadow: var(--app-shadow);
}

.btn-gallery-nav {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: white;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--app-transition);
    margin: 0 10px;
}

.btn-gallery-nav:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

/* Thumbnails */
.thumbnail-container {
    border: 2px solid var(--gray-300);
    border-radius: 8px;
    overflow: hidden;
    transition: var(--app-transition);
}

.thumbnail-container.active {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

.thumbnail-container:hover:not(.active) {
    border-color: var(--accent-color);
}

.thumbnail-scroll {
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) var(--gray-200);
}

.thumbnail-scroll::-webkit-scrollbar {
    height: 6px;
}

.thumbnail-scroll::-webkit-scrollbar-track {
    background: var(--gray-200);
    border-radius: 10px;
}

.thumbnail-scroll::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 10px;
}

/* Category Badge */
.category-badge {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* Price Container */
.price-container {
    background: var(--light-color);
    padding: 1.5rem;
    border-radius: var(--app-radius);
    margin: 1.5rem 0;
    border-left: 4px solid var(--primary-color);
    box-shadow: var(--app-shadow);
}

.current-price {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.compare-price {
    font-size: 1.3rem;
    color: var(--gray-600);
}

.discount-badge {
    background: linear-gradient(135deg, var(--warning-color), #e67e22) !important;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
}

/* Color Selector */
.color-selector-label {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 1rem;
    display: block;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.color-option {
    cursor: pointer;
    transition: var(--app-transition);
    position: relative;
}

.color-option.active {
    transform: scale(1.05);
}

.color-option.active::after {
    content: '✓';
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--primary-color);
    color: white;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    border: 2px solid white;
}

.color-option:hover:not(.active) {
    transform: scale(1.02);
    box-shadow: var(--app-shadow);
}

.color-image-placeholder {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-weight: 600;
}

/* Size Options */
.size-option {
    border-radius: 8px !important;
    font-weight: 600 !important;
    padding: 0.75rem 1rem !important;
    transition: var(--app-transition) !important;
}

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

.btn-outline-primary:hover:not(:disabled) {
    background: var(--primary-color) !important;
    color: white !important;
    transform: translateY(-2px);
    box-shadow: var(--app-shadow);
}

.btn-primary {
    background: var(--primary-color) !important;
    border: 2px solid var(--primary-color) !important;
    color: white !important;
}

.btn-primary:hover:not(:disabled) {
    background: var(--secondary-color) !important;
    border-color: var(--secondary-color) !important;
    transform: translateY(-2px);
    box-shadow: var(--app-shadow);
}

/* Stock Info */
.stock-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    border-radius: var(--app-radius);
    font-weight: 500;
}

.stock-available {
    background: rgba(75, 181, 67, 0.1);
    color: var(--success-color);
    border-left: 4px solid var(--success-color);
}

.stock-low {
    background: rgba(252, 163, 17, 0.1);
    color: var(--warning-color);
    border-left: 4px solid var(--warning-color);
}

.stock-out {
    background: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
    border-left: 4px solid var(--danger-color);
}

/* Quantity Selector */
.quantity-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border: 2px solid var(--gray-300);
    border-radius: 8px;
    padding: 0.25rem;
}

.quantity-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px !important;
    border: none;
    background: var(--light-color);
    color: var(--primary-color);
    font-weight: 600;
    transition: var(--app-transition);
}

.quantity-btn:hover:not(:disabled) {
    background: var(--primary-color);
    color: white;
}

.quantity-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.quantity-input {
    width: 80px;
    text-align: center;
    border: none;
    font-weight: 600;
    color: var(--gray-800);
    -moz-appearance: textfield;
}

.quantity-input::-webkit-outer-spin-button,
.quantity-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

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

/* Add to Cart Button */
.add-to-cart-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
    border: none !important;
    color: white !important;
    padding: 0.75rem 2rem !important;
    font-weight: 600 !important;
    border-radius: 8px !important;
    transition: var(--app-transition) !important;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.add-to-cart-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(67, 97, 238, 0.4);
}

.add-to-cart-btn:disabled {
    background: var(--gray-400) !important;
    cursor: not-allowed;
}

/* Description Sections */
.short-description {
    background: var(--light-color);
    padding: 1.5rem;
    border-radius: var(--app-radius);
    margin: 1.5rem 0;
    border: 2px solid var(--gray-200);
    color: var(--gray-700);
    line-height: 1.6;
}

.product-description-section {
    background: var(--light-color);
    padding: 2rem;
    border-radius: var(--app-radius);
    border: 2px solid var(--gray-200);
}

.section-title {
    color: var(--primary-color);
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid var(--accent-color);
    display: inline-block;
}

.product-description {
    color: var(--gray-700);
    line-height: 1.8;
    font-size: 1rem;
}

/* Product Info Grid */
.product-info-grid {
    background: var(--light-color);
    padding: 1.5rem;
    border-radius: var(--app-radius);
    margin: 1.5rem 0;
    border: 2px solid var(--gray-200);
}

.info-item {
    display: flex;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-300);
}

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

.info-label {
    font-weight: 600;
    color: var(--gray-600);
    width: 140px;
    flex-shrink: 0;
}

.info-value {
    color: var(--gray-800);
    font-weight: 500;
}

/* Focus Ring */
.focus-ring:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.4);
}

/* Image Zoom */
.image-zoom-container {
    transition: transform 0.3s ease;
}

.image-zoom-container.zoomed {
    transform: scale(1.5);
    cursor: zoom-out;
}

/* Loading State */
.btn-loading {
    position: relative;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 2px solid white;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Responsive Adjustments */
@media (max-width: 768px) {
    .current-price {
        font-size: 1.8rem;
    }
    
    .info-item {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .info-label {
        width: auto;
    }
    
    .product-gallery-container {
        height: 350px !important;
    }
}