/**
 * shadcn-inspired Homepage SPA Styles
 * Glassmorphism + Tailwind-style utilities + Smooth animations
 * Based on cards_on_home_ref design reference
 */

/* ==========================================================================
   CSS VARIABLES (Design Tokens)
   ========================================================================== */

:root {
    /* Glass effects */
    --glass-bg: rgba(15, 23, 42, 0.3);
    --glass-border: rgba(148, 163, 184, 0.1);
    --glass-blur: 24px;

    /* Colors (shadcn palette) */
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;

    --cyan-300: #67e8f9;
    --cyan-400: #22d3ee;
    --cyan-500: #06b6d4;
    --cyan-600: #0891b2;

    --purple-400: #c084fc;
    --purple-500: #a855f7;
    --purple-600: #9333ea;

    --pink-400: #f472b6;
    --pink-500: #ec4899;
    --pink-600: #db2777;

    --green-400: #4ade80;
    --green-500: #22c55e;

    --red-500: #ef4444;
    --orange-500: #f97316;
    --yellow-400: #facc15;

    /* Gradients */
    --gradient-cyan-purple: linear-gradient(135deg, var(--cyan-400), var(--purple-500));
    --gradient-pink-cyan: linear-gradient(135deg, var(--pink-500), var(--cyan-500));
    --gradient-purple-pink: linear-gradient(135deg, var(--purple-500), var(--pink-500));

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

    /* Border radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   SPA CONTAINER & LAYOUT
   ========================================================================== */

#spa-container {
    min-height: 100vh;
    padding: var(--spacing-xl) var(--spacing-md);
    max-width: 1400px;
    margin: 0 auto;
}

.spa-section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

/* ==========================================================================
   HEADER SECTION
   ========================================================================== */

.spa-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.header-content {
    flex: 1;
}

.header-title {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.gradient-text {
    background: linear-gradient(135deg, var(--cyan-400) 0%, var(--purple-500) 50%, var(--pink-500) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-subtitle {
    color: rgba(148, 163, 184, 0.7);
    font-size: 1.125rem;
}

.btn-cart {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--gradient-cyan-purple);
    color: white;
    border: none;
    border-radius: var(--radius-xl);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.2);
}

.btn-cart:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(6, 182, 212, 0.3);
}

.cart-icon {
    width: 20px;
    height: 20px;
}

.cart-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--pink-500);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
}

.btn-back {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--cyan-300);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    margin-bottom: var(--spacing-lg);
    backdrop-filter: blur(var(--glass-blur));
}

.btn-back:hover {
    background: rgba(6, 182, 212, 0.1);
    border-color: var(--cyan-500);
    color: var(--cyan-400);
}

.btn-back svg {
    width: 16px;
    height: 16px;
}

/* ==========================================================================
   GRID LAYOUTS (Responsive)
   ========================================================================== */

.grid-categories,
.grid-subcategories,
.grid-products {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .grid-categories,
    .grid-subcategories,
    .grid-products {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .grid-categories,
    .grid-subcategories {
        grid-template-columns: repeat(3, 1fr);
    }

    .grid-products {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1280px) {
    .grid-products {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ==========================================================================
   GLASS CARDS (Base)
   ========================================================================== */

.glass-card {
    position: relative;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    border: 0.5px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    transition: all var(--transition-slow);
    cursor: pointer;
}

.glass-card:hover {
    border-color: rgba(6, 182, 212, 0.5);
    box-shadow: 0 20px 40px rgba(6, 182, 212, 0.2);
    transform: translateY(-8px);
}

.glass-card:hover .card-image {
    transform: scale(1.1);
}

.card-image-wrapper {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

.card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(15, 23, 42, 0.8) 0%,
        rgba(15, 23, 42, 0.4) 50%,
        transparent 100%
    );
}

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

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--cyan-100);
    margin-bottom: var(--spacing-xs);
    transition: color var(--transition-base);
}

.glass-card:hover .card-title {
    color: var(--cyan-300);
}

.card-subtitle-ar {
    color: rgba(148, 163, 184, 0.6);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

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

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--slate-400);
}

.stat-icon {
    font-size: 1rem;
}

.arrow-icon {
    width: 20px;
    height: 20px;
    color: var(--cyan-400);
    transition: transform var(--transition-base);
}

.glass-card:hover .arrow-icon {
    transform: translateX(4px);
    color: var(--cyan-300);
}

/* ==========================================================================
   BADGES
   ========================================================================== */

.card-badge {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    z-index: 10;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    color: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.badge-hot {
    background: linear-gradient(135deg, #ff3d71 0%, #ff6b6b 100%);
}

.badge-new {
    background: linear-gradient(135deg, #00ff88 0%, #00d4ff 100%);
}

.badge-popular {
    background: linear-gradient(135deg, #a855f7 0%, #ec4899 100%);
}

.badge-discount {
    background: linear-gradient(135deg, #ffd700 0%, #ff8c00 100%);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.9;
        transform: scale(1.05);
    }
}

.trending-indicator {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    z-index: 10;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: linear-gradient(135deg, rgba(236, 72, 153, 0.9), rgba(168, 85, 247, 0.9));
    backdrop-filter: blur(8px);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    color: white;
}

.trending-indicator svg {
    width: 12px;
    height: 12px;
}

.floating-icon {
    position: absolute;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 56px;
    height: 56px;
    border-radius: var(--radius-xl);
    background: var(--gradient-purple-pink);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(168, 85, 247, 0.3);
    transition: all var(--transition-base);
}

.glass-card:hover .floating-icon {
    transform: scale(1.1) rotate(12deg);
}

.icon-emoji {
    font-size: 1.5rem;
    margin: 0 auto;
}

/* ==========================================================================
   SUBCATEGORY CARDS (Modern Design - Magazine Style)
   ========================================================================== */

/* Subcategory Grid Container */
.subcategories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    padding: 20px 0;
}

/* Individual Subcategory Card */
.subcategory-card {
    position: relative;
    background: linear-gradient(135deg, 
        rgba(99, 102, 241, 0.1) 0%, 
        rgba(168, 85, 247, 0.1) 100%);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 24px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Gradient Background Animation */
.subcategory-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(
        circle at 50% 50%,
        rgba(99, 102, 241, 0.15) 0%,
        transparent 50%
    );
    opacity: 0;
    transition: opacity 0.4s ease;
}

.subcategory-card:hover::before {
    opacity: 1;
    animation: gradient-rotate 8s linear infinite;
}

@keyframes gradient-rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Hover Effects */
.subcategory-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: rgba(99, 102, 241, 0.5);
    box-shadow: 
        0 20px 40px rgba(99, 102, 241, 0.2),
        0 0 0 1px rgba(99, 102, 241, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* Icon Container */
.subcategory-icon {
    position: relative;
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    box-shadow: 0 8px 16px rgba(99, 102, 241, 0.3);
    transition: all 0.3s ease;
}

.subcategory-card:hover .subcategory-icon {
    transform: scale(1.1) rotate(-5deg);
    box-shadow: 0 12px 24px rgba(99, 102, 241, 0.4);
}

/* Title & Description */
.subcategory-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 8px;
    line-height: 1.4;
    transition: color 0.3s ease;
}

.subcategory-card:hover .subcategory-title {
    background: linear-gradient(135deg, #60efff 0%, #0061ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subcategory-description {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
    margin-bottom: 16px;
}

/* Stats Section */
.subcategory-stats {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.stat-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

.stat-pulse {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #10b981;
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.6);
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.6;
        transform: scale(1.3);
    }
}

/* Product Count Badge */
.product-count-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: rgba(6, 182, 212, 0.2);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(6, 182, 212, 0.3);
    border-radius: 12px;
    padding: 6px 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
    font-size: 0.875rem;
}

.product-count-text {
    color: #06b6d4;
    text-shadow: 0 0 10px rgba(6, 182, 212, 0.5);
}

/* Progress Bar (for availability indicator) */
.progress-bar {
    height: 4px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 999px;
    overflow: hidden;
    margin-top: 12px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #06b6d4 0%, #8b5cf6 100%);
    border-radius: 999px;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 8px rgba(6, 182, 212, 0.5);
}

/* Trending Badge */
.trending-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    background: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    color: #fff;
    padding: 4px 10px;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
    animation: badge-pulse 2s infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .subcategories-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: 16px;
    }
    
    .subcategory-card {
        padding: 20px;
    }
    
    .subcategory-icon {
        width: 56px;
        height: 56px;
        font-size: 28px;
    }
}

/* ==========================================================================
   PRODUCT CARDS (Enhanced)
   ========================================================================== */

.delivery-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    z-index: 10;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(34, 197, 94, 0.9);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-sm);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.star {
    font-size: 1rem;
}

.star-full {
    color: var(--yellow-400);
}

.star-half {
    color: var(--yellow-400);
    opacity: 0.5;
}

.star-empty {
    color: var(--slate-600);
}

.rating-text {
    font-size: 0.875rem;
    color: var(--cyan-200);
}

.product-price {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.price-original {
    font-size: 1rem;
    color: var(--slate-400);
    text-decoration: line-through;
}

.price-current {
    font-size: 1.875rem;
    font-weight: 900;
    color: var(--pink-400);
    font-family: 'JetBrains Mono', monospace;
}

.btn-buy {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--gradient-pink-cyan);
    color: white;
    border: none;
    border-radius: var(--radius-xl);
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-buy:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 24px rgba(236, 72, 153, 0.3);
}

.btn-icon {
    width: 16px;
    height: 16px;
}

/* ==========================================================================
   GROUPED PRODUCTS - VARIANT SELECTOR
   ========================================================================== */

/* Grouped product card styles would go here if needed */

.variant-count-badge {
    position: absolute;
    bottom: var(--spacing-md);
    left: var(--spacing-md);
    z-index: 10;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: linear-gradient(135deg, var(--purple-500), var(--pink-500));
    backdrop-filter: blur(8px);
    border-radius: var(--radius-sm);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(168, 85, 247, 0.3);
}

.variant-selector {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.variant-selector:hover {
    background: rgba(15, 23, 42, 0.7);
    border-color: rgba(6, 182, 212, 0.3);
}

.variant-selector label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--cyan-300);
    margin-bottom: var(--spacing-sm);
}

.selector-icon {
    width: 16px;
    height: 16px;
    color: var(--purple-400);
}

.variant-select {
    width: 100%;
    padding: var(--spacing-md);
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: white;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    outline: none;
    font-family: inherit;
}

.variant-select:hover {
    background: rgba(15, 23, 42, 0.9);
    border-color: var(--cyan-400);
}

.variant-select:focus {
    border-color: var(--purple-500);
    box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.2);
    background: rgba(15, 23, 42, 0.95);
}

.variant-select option {
    background: var(--slate-900);
    color: white;
    padding: var(--spacing-sm);
    font-weight: 500;
}

/* Animated price update */
.grouped-product-card .product-price {
    transition: all var(--transition-base);
}

.grouped-product-card .price-current,
.grouped-product-card .price-original {
    transition: all var(--transition-base);
}

/* Smooth badge transitions */
.grouped-product-card .card-badge {
    transition: all var(--transition-base);
}

/* ==========================================================================
   LOADING STATE
   ========================================================================== */

.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    gap: var(--spacing-lg);
}

.loading-spinner {
    width: 64px;
    height: 64px;
    border: 4px solid rgba(6, 182, 212, 0.2);
    border-top-color: var(--cyan-500);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-text {
    color: var(--cyan-300);
    font-size: 1.125rem;
}

/* ==========================================================================
   ERROR STATE
   ========================================================================== */

.error-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    text-align: center;
    gap: var(--spacing-lg);
}

.error-icon {
    font-size: 4rem;
}

.error-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--cyan-100);
}

.error-message {
    color: var(--slate-400);
    font-size: 1.125rem;
}

.btn-retry {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--gradient-cyan-purple);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-retry:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(6, 182, 212, 0.3);
}

/* ==========================================================================
   RESPONSIVE ADJUSTMENTS
   ========================================================================== */

@media (max-width: 767px) {
    #spa-container {
        padding: var(--spacing-md);
    }

    .header-title {
        font-size: 2rem;
    }

    .spa-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .btn-cart {
        width: 100%;
        justify-content: center;
    }

    .card-image-wrapper {
        height: 160px;
    }

    .card-title {
        font-size: 1.125rem;
    }

    .price-current {
        font-size: 1.5rem;
    }
}

/* ==========================================================================
   ANIMATIONS & TRANSITIONS
   ========================================================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.spa-section {
    animation: fadeIn var(--transition-slow) ease-out;
}

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