/**
 * EMIRATES SOUQ - ULTIMATE SEO-OPTIMIZED PROFESSIONAL THEME
 * Built according to Google SEO Starter Guide specifications
 * Core Web Vitals optimized, WCAG 2.1 AA compliant, Mobile-first
 */

/* ===== CSS RESET & FOUNDATION ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: clamp(14px, 1.5vw, 18px);
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    text-rendering: optimizeLegibility;
}

:root {
    /* BRAND COLORS - High Contrast for Accessibility */
    --primary-blue: #1e40af;          /* Trust & Authority */
    --primary-blue-light: #3b82f6;    /* Interactive Elements */
    --primary-blue-dark: #1e3a8a;     /* Headers & Focus */
    
    --success-green: #059669;         /* CTA & Success */
    --success-green-light: #10b981;   /* Hover States */
    --success-green-dark: #047857;    /* Active States */
    
    --accent-red: #dc2626;            /* Urgent Actions */
    --accent-orange: #f59e0b;         /* Warnings & Discounts */
    
    /* NEUTRALS - Optimized for Readability */
    --text-primary: #111827;          /* 4.5:1 contrast ratio */
    --text-secondary: #374151;        /* Secondary content */
    --text-muted: #6b7280;            /* Meta information */
    --text-inverse: #ffffff;          /* On dark backgrounds */
    
    --bg-primary: #ffffff;            /* Main background */
    --bg-secondary: #f9fafb;          /* Section backgrounds */
    --bg-tertiary: #f3f4f6;           /* Card backgrounds */
    --bg-dark: #1f2937;               /* Footer/headers */
    
    --border-light: #e5e7eb;          /* Subtle dividers */
    --border-medium: #d1d5db;         /* Card borders */
    --border-dark: #9ca3af;           /* Input borders */
    
    /* SHADOWS - Progressive Enhancement */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* SPACING - 8px Base System */
    --space-0: 0;
    --space-1: 0.25rem;    /* 4px */
    --space-2: 0.5rem;     /* 8px */
    --space-3: 0.75rem;    /* 12px */
    --space-4: 1rem;       /* 16px */
    --space-5: 1.25rem;    /* 20px */
    --space-6: 1.5rem;     /* 24px */
    --space-8: 2rem;       /* 32px */
    --space-10: 2.5rem;    /* 40px */
    --space-12: 3rem;      /* 48px */
    --space-16: 4rem;      /* 64px */
    --space-20: 5rem;      /* 80px */
    
    /* TYPOGRAPHY - Optimized for Arabic & English */
    --font-family-ar: 'Cairo', 'Noto Sans Arabic', system-ui, -apple-system, sans-serif;
    --font-family-en: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
    
    --font-size-xs: 0.75rem;      /* 12px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-base: 1rem;       /* 16px */
    --font-size-lg: 1.125rem;     /* 18px */
    --font-size-xl: 1.25rem;      /* 20px */
    --font-size-2xl: 1.5rem;      /* 24px */
    --font-size-3xl: 1.875rem;    /* 30px */
    --font-size-4xl: 2.25rem;     /* 36px */
    
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* LAYOUT SYSTEM */
    --container-max: 1200px;
    --container-padding: clamp(1rem, 5vw, 2rem);
    
    /* BORDER RADIUS */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* TRANSITIONS - Performance Optimized */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-INDEX SCALE */
    --z-base: 1;
    --z-dropdown: 1000;
    --z-sticky: 1010;
    --z-fixed: 1020;
    --z-modal: 1050;
    --z-tooltip: 1060;
}

/* ===== GLOBAL BASE STYLES ===== */
body {
    font-family: var(--font-family-ar);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

.ltr {
    font-family: var(--font-family-en);
    direction: ltr;
    text-align: left;
}

main {
    min-height: 100vh;
    padding-top: 80px;
}

section {
    padding: var(--space-16) 0;
}

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-blue);
    color: var(--text-inverse);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    text-decoration: none;
    z-index: var(--z-tooltip);
    font-weight: var(--font-weight-semibold);
    transition: var(--transition-fast);
}

.skip-link:focus {
    top: 6px;
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition-normal);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) 0;
    gap: var(--space-4);
    min-height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-lg);
    transition: var(--transition-fast);
}

.logo:hover,
.logo:focus {
    color: var(--primary-blue);
    outline: none;
}

.logo img {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-list a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    border: 2px solid transparent;
    transition: var(--transition-fast);
    white-space: nowrap;
    min-height: 44px;
    min-width: 44px;
}

.nav-list a:hover,
.nav-list a:focus {
    color: var(--primary-blue);
    background-color: rgba(30, 64, 175, 0.1);
    border-color: var(--primary-blue);
    outline: none;
    transform: translateY(-1px);
}

/* ===== HERO SECTION ===== */
.hero-section {
    padding: calc(80px + var(--space-16)) 0 var(--space-16);
    background: linear-gradient(135deg, 
        var(--bg-primary) 0%, 
        var(--bg-secondary) 50%, 
        var(--bg-primary) 100%
    );
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 40%, rgba(59, 130, 246, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-extrabold);
    color: var(--text-primary);
    margin-bottom: var(--space-6);
    line-height: var(--line-height-tight);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-8);
    line-height: var(--line-height-relaxed);
}

.search-box {
    display: flex;
    max-width: 500px;
    margin: 0 auto;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 2px solid var(--border-medium);
    transition: var(--transition-normal);
}

.search-box:focus-within {
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-xl);
}

.search-input {
    flex: 1;
    padding: var(--space-4) var(--space-5);
    border: none;
    background: transparent;
    font-size: var(--font-size-base);
    color: var(--text-primary);
    outline: none;
    font-family: inherit;
}

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

.search-btn {
    padding: var(--space-4) var(--space-5);
    border: none;
    background: var(--primary-blue);
    color: var(--text-inverse);
    font-size: var(--font-size-lg);
    cursor: pointer;
    transition: var(--transition-fast);
    min-width: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-btn:hover,
.search-btn:focus {
    background: var(--primary-blue-dark);
    outline: none;
}

/* ===== SECTIONS ===== */
.section {
    padding: var(--space-16) 0;
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    text-align: center;
    margin-bottom: var(--space-12);
    line-height: var(--line-height-tight);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== GRID SYSTEMS ===== */
.categories-grid,
.products-grid {
    display: grid;
    gap: var(--space-8);
    margin-bottom: var(--space-12);
}

.categories-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.products-grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

/* ===== CARDS ===== */
.category-card,
.product-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-normal);
    border: 2px solid var(--border-light);
    cursor: pointer;
    position: relative;
}

.category-card:hover,
.category-card:focus,
.product-card:hover,
.product-card:focus {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-blue);
    outline: none;
}

.category-card {
    text-align: center;
    padding: var(--space-12);
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.category-icon {
    font-size: 3rem;
    margin-bottom: var(--space-6);
    display: block;
    line-height: 1;
}

.category-name {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-3);
    line-height: var(--line-height-tight);
}

.category-count {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
}

/* ===== PRODUCT CARDS ===== */
.product-image {
    position: relative;
    height: 240px;
    overflow: hidden;
    background: var(--bg-tertiary);
}

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

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.discount-badge {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    background: var(--accent-red);
    color: var(--text-inverse);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    z-index: var(--z-base);
    box-shadow: var(--shadow-md);
}

.product-info {
    padding: var(--space-6);
}

.product-category {
    font-size: var(--font-size-xs);
    color: var(--primary-blue);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-2);
}

.product-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    line-height: var(--line-height-tight);
    cursor: pointer;
    transition: var(--transition-fast);
}

.product-title:hover {
    color: var(--primary-blue);
}

.product-price {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
}

.current-price {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--success-green);
}

.original-price {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    text-decoration: line-through;
}

.product-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-2);
    margin-bottom: var(--space-6);
}

.feature {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    padding: var(--space-2) var(--space-3);
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: var(--font-weight-medium);
}

.product-actions {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-3);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    text-decoration: none;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition-fast);
    min-height: 44px;
    text-align: center;
    white-space: nowrap;
    font-family: inherit;
    line-height: 1;
}

.btn:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

.add-to-cart {
    background: var(--success-green);
    color: var(--text-inverse);
    border-color: var(--success-green);
}

.add-to-cart:hover,
.add-to-cart:focus {
    background: var(--success-green-dark);
    border-color: var(--success-green-dark);
    transform: translateY(-2px);
    color: var(--text-inverse);
}

.whatsapp-btn {
    background: #25D366;
    color: var(--text-inverse);
    border-color: #25D366;
}

.whatsapp-btn:hover,
.whatsapp-btn:focus {
    background: #128C7E;
    border-color: #128C7E;
    color: var(--text-inverse);
}

.view-details {
    background: var(--bg-primary);
    color: var(--text-primary);
    border-color: var(--border-medium);
}

.view-details:hover,
.view-details:focus {
    background: var(--primary-blue);
    color: var(--text-inverse);
    border-color: var(--primary-blue);
}

/* ===== TABS ===== */
.tabs-nav {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    margin-bottom: var(--space-12);
    flex-wrap: wrap;
    border-bottom: 2px solid var(--border-light);
    padding-bottom: var(--space-4);
}

.tab-btn {
    padding: var(--space-4) var(--space-6);
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid transparent;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: var(--font-size-base);
}

.tab-btn.active {
    color: var(--primary-blue);
    background: var(--bg-primary);
    border-color: var(--primary-blue);
    border-bottom-color: var(--bg-primary);
    margin-bottom: -2px;
}

.tab-btn:hover:not(.active) {
    color: var(--primary-blue);
    background: rgba(30, 64, 175, 0.05);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-dark);
    color: var(--text-inverse);
    padding: var(--space-16) 0 var(--space-8);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--success-green), var(--primary-blue));
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.footer-section h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-6);
    color: var(--text-inverse);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition-fast);
    display: inline-block;
    margin-bottom: var(--space-3);
    padding: var(--space-1) 0;
}

.footer-section a:hover,
.footer-section a:focus {
    color: var(--text-inverse);
    transform: translateX(4px);
}

/* ===== FLOATING ELEMENTS ===== */
.whatsapp-float {
    position: fixed;
    bottom: var(--space-8);
    right: var(--space-8);
    z-index: var(--z-fixed);
    width: 60px;
    height: 60px;
    background: #25D366;
    color: var(--text-inverse);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    text-decoration: none;
    box-shadow: var(--shadow-xl);
    transition: var(--transition-normal);
    animation: pulse 2s infinite;
}

.whatsapp-float:hover,
.whatsapp-float:focus {
    background: #128C7E;
    transform: scale(1.1);
    color: var(--text-inverse);
    animation: none;
}

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

/* ===== LOADING STATES ===== */
.loading {
    text-align: center;
    padding: var(--space-16);
    color: var(--text-secondary);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-light);
    border-top: 4px solid var(--primary-blue);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
    margin: 0 auto var(--space-6);
}

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

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    :root {
        --container-padding: var(--space-4);
        --space-16: var(--space-12);
    }
    
    .header-content {
        flex-wrap: wrap;
        gap: var(--space-3);
        padding: var(--space-3) 0;
        min-height: 70px;
    }
    
    .nav-list {
        gap: var(--space-1);
        justify-content: center;
        width: 100%;
        flex-wrap: wrap;
    }
    
    .nav-list a {
        padding: var(--space-2) var(--space-3);
        font-size: var(--font-size-xs);
        min-height: 40px;
    }
    
    main {
        padding-top: 120px;
    }
    
    .hero-section {
        padding: var(--space-12) 0 var(--space-12);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .search-box {
        flex-direction: column;
        border-radius: var(--radius-lg);
        max-width: none;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: var(--space-6);
    }
    
    .product-actions {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }
    
    .tabs-nav {
        flex-direction: column;
        align-items: center;
    }
    
    .tab-btn {
        width: 100%;
        max-width: 300px;
        border-radius: var(--radius-md);
        margin-bottom: 0;
    }
    
    .mobile-cta-bar {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        border-top: 2px solid var(--border-medium);
        padding: var(--space-4);
        z-index: var(--z-fixed);
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--space-3);
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
    }
    
    body {
        padding-bottom: 80px;
    }
    
    .whatsapp-float {
        bottom: 100px;
        width: 56px;
        height: 56px;
        font-size: var(--font-size-xl);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .product-image {
        height: 200px;
    }
}

/* ===== ACCESSIBILITY ===== */
@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;
    }
    
    .whatsapp-float {
        animation: none !important;
    }
}

:focus-visible {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.breadcrumb {
    padding: var(--space-4) 0;
    margin-bottom: var(--space-6);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
}

.breadcrumb a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: var(--transition-fast);
}

.breadcrumb a:hover,
.breadcrumb a:focus {
    text-decoration: underline;
    color: var(--primary-blue-dark);
}

.breadcrumb span {
    margin: 0 var(--space-2);
    color: var(--text-muted);
}