/* ==================== ENHANCED CSS - OPTIMIZED & RESPONSIVE ==================== */

/* ===== CSS VARIABLES (Enhanced & Organized) ===== */
:root {
    /* Colors */
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --primary-light: rgba(0, 123, 255, 0.1);
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-muted: #95a5a6;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-gradient: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    
    --border-color: #dee2e6;
    --border-light: #e9ecef;
    
    /* Spacing (Mobile First - rem based) */
    --spacing-xs: 0.5rem;    /* 8px */
    --spacing-sm: 0.75rem;   /* 12px */
    --spacing-md: 1rem;      /* 16px */
    --spacing-lg: 1.5rem;    /* 24px */
    --spacing-xl: 2rem;      /* 32px */
    --spacing-2xl: 3rem;     /* 48px */
    --spacing-3xl: 4rem;     /* 64px */
    
    /* Border Radius */
    --radius-sm: 0.5rem;     /* 8px */
    --radius-md: 0.75rem;    /* 12px */
    --radius-lg: 1rem;       /* 16px */
    --radius-xl: 1.25rem;    /* 20px */
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 0.125rem 0.5rem rgba(0, 0, 0, 0.06);
    --shadow-md: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 0.75rem 2rem rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    
    /* Typography */
    --font-base: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --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: 2rem;       /* 32px */
    
    /* Container */
    --container-max-width: 75rem; /* 1200px */
    --container-padding: var(--spacing-md);
    
    /* Touch Targets (Minimum 44x44px) */
    --touch-target-min: 2.75rem; /* 44px */
}

/* Tablet and up */
@media (min-width: 768px) {
    :root {
        --spacing-lg: 2rem;
        --spacing-xl: 2.5rem;
        --spacing-2xl: 4rem;
        --container-padding: var(--spacing-lg);
    }
}

/* Desktop and up */
@media (min-width: 1024px) {
    :root {
        --spacing-2xl: 5rem;
        --spacing-3xl: 6rem;
    }
}

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

html {
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    text-size-adjust: 100%;
    font-size: 16px;
    scroll-behavior: smooth;
    height: 100%;
}

body {
    font-family: var(--font-base);
    background: var(--bg-gradient);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Improve tap highlight */
a, button, input, select, textarea {
    -webkit-tap-highlight-color: var(--primary-light);
    touch-action: manipulation;
}

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

/* Focus styles for accessibility */
*:focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

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

/* ===== TOP BAR ===== */
.mobile-top-bar {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border-bottom: 1px solid var(--border-light);
    padding: var(--spacing-sm) var(--container-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    min-height: 3.75rem; /* 60px */
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    backdrop-filter: blur(10px);
}

.top-menu ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.top-menu a {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 600;
    transition: all var(--transition-base);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    min-height: var(--touch-target-min);
    min-width: var(--touch-target-min);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    position: relative;
}

.top-menu a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 80%;
    height: 2px;
    background: var(--primary-color);
    transition: transform var(--transition-base);
}

.top-menu a:hover,
.top-menu a:focus {
    color: var(--primary-hover);
    background-color: var(--primary-light);
}

.top-menu a:hover::before {
    transform: translateX(-50%) scaleX(1);
}

.top-controls {
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
}

.top-controls select {
    min-height: var(--touch-target-min);
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    border: 2px solid var(--border-light);
    background: var(--bg-primary);
    transition: all var(--transition-base);
    cursor: pointer;
    font-family: inherit;
}

.top-controls select:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.top-controls select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--primary-light);
}

/* ===== HEADER ===== */
.header {
    background: var(--bg-primary);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 3.75rem; /* Height of top bar */
    z-index: calc(var(--z-sticky) - 1);
    transition: all var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-lg);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    gap: var(--spacing-md);
}

.logo {
    font-size: var(--font-size-2xl);
    font-weight: bold;
    color: var(--text-primary);
    text-decoration: none;
    transition: transform var(--transition-base);
    flex-shrink: 0;
}

.logo:hover,
.logo:focus {
    transform: scale(1.05);
}

.logo img {
    height: 3.125rem; /* 50px */
    width: auto;
    transition: filter var(--transition-base);
}

.logo img:hover {
    filter: brightness(1.1);
}

/* Desktop Navigation */
.desktop-nav {
    display: none;
}

.desktop-nav ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-lg);
}

.desktop-nav a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: all var(--transition-base);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    position: relative;
    white-space: nowrap;
}

.desktop-nav a::after {
    content: '';
    position: absolute;
    bottom: 0.3125rem; /* 5px */
    left: var(--spacing-md);
    right: var(--spacing-md);
    height: 2px;
    background: var(--primary-color);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.desktop-nav a:hover,
.desktop-nav a:focus {
    color: var(--primary-color);
    background-color: var(--primary-light);
}

.desktop-nav a:hover::after {
    transform: scaleX(1);
}

/* ===== SEARCH & CART SECTION ===== */
.header-main {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg) var(--container-padding);
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border-bottom: 1px solid var(--border-light);
    flex-wrap: wrap;
    gap: var(--spacing-md);
    min-height: 5rem; /* 80px */
}

.search-bar {
    flex: 1 1 100%;
    display: flex;
    gap: var(--spacing-xs);
    max-width: 100%;
    position: relative;
}

.search-bar input {
    flex: 1;
    border: 2px solid var(--border-light);
    transition: all var(--transition-base);
    min-height: var(--touch-target-min);
    font-size: var(--font-size-base);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    font-family: inherit;
}

.search-bar input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--primary-light);
    outline: none;
    transform: translateY(-1px);
}

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

.search-bar button {
    min-height: var(--touch-target-min);
    min-width: 5rem; /* 80px */
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    border: none;
    cursor: pointer;
    white-space: nowrap;
}

.search-bar button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transition: transform var(--transition-slow);
}

.search-bar button:hover::before {
    transform: translate(-50%, -50%) scale(2);
}

.search-bar button:active {
    transform: scale(0.95);
}

/* ===== CART DROPDOWN ===== */
.cart-dropdown {
    position: relative;
    display: inline-block;
    flex-shrink: 0;
}

#cart-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: all var(--transition-base);
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    white-space: nowrap;
    font-weight: 600;
}

#cart-btn:hover,
#cart-btn:focus {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.cart-preview {
    display: none;
    position: absolute;
    top: calc(100% + 0.625rem); /* 10px gap */
    right: 0;
    width: 20rem; /* 320px */
    max-width: 90vw;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-light);
    z-index: var(--z-dropdown);
    animation: fadeInDown 0.3s ease;
}

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

.cart-dropdown:hover .cart-preview,
.cart-dropdown:focus-within .cart-preview {
    display: block;
}

.cart-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--border-light);
    gap: var(--spacing-sm);
}

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

.cart-item img {
    width: 3.4375rem; /* 55px */
    height: 3.4375rem;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-light);
    flex-shrink: 0;
}

.cart-item-details {
    flex: 1;
    min-width: 0;
}

.cart-item-details h6 {
    margin: 0 0 var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.cart-item-details span {
    font-size: 0.8125rem; /* 13px */
    color: var(--text-secondary);
}

.cart-footer {
    padding: var(--spacing-md);
    text-align: center;
    background: var(--bg-secondary);
}

.cart-footer a {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--success-color);
    color: white;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all var(--transition-base);
    min-height: var(--touch-target-min);
    line-height: 1.5;
    font-weight: 600;
}

.cart-footer a:hover,
.cart-footer a:focus {
    background: #218838;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== MOBILE MENU ===== */
.menu-toggle {
    display: flex;
    flex-direction: column;
    cursor: pointer;
    width: 1.875rem; /* 30px */
    height: 1.5625rem; /* 25px */
    justify-content: space-between;
    transition: all var(--transition-base);
    background: none;
    border: none;
    padding: 0;
    min-width: var(--touch-target-min);
    min-height: var(--touch-target-min);
    align-items: center;
}

.menu-toggle:hover,
.menu-toggle:focus {
    transform: scale(1.1);
}

.menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--text-primary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(11px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-11px) rotate(-45deg);
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: -18.75rem; /* -300px */
    width: 18.75rem;
    max-width: 85vw;
    height: 100vh;
    background: var(--bg-primary);
    z-index: var(--z-modal);
    box-shadow: -5px 0 25px rgba(0, 0, 0, 0.15);
    transition: right var(--transition-slow);
    overflow-y: auto;
    padding: var(--spacing-lg);
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: 3.75rem; /* 60px - space for header */
}

.mobile-menu a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    transition: all var(--transition-base);
    text-align: center;
    font-size: var(--font-size-base);
    position: relative;
    overflow: hidden;
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-menu a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%) scaleY(0);
    width: 4px;
    height: 70%;
    background: var(--primary-color);
    transition: transform var(--transition-base);
}

.mobile-menu a:hover::before,
.mobile-menu a:focus::before {
    transform: translateY(-50%) scaleY(1);
}

.mobile-menu a:hover,
.mobile-menu a:focus {
    background: var(--primary-color);
    color: white;
    transform: translateX(-5px);
}

.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-modal) - 1);
    backdrop-filter: blur(4px);
}

.mobile-menu-overlay.active {
    display: block;
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    left: var(--spacing-lg);
}

.mobile-menu-header h5 {
    margin: 0;
    font-size: var(--font-size-lg);
    color: var(--text-primary);
}

.mobile-menu-close {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    color: var(--text-primary);
    transition: all var(--transition-base);
    min-width: var(--touch-target-min);
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.mobile-menu-close:hover,
.mobile-menu-close:focus {
    transform: rotate(90deg);
    color: var(--danger-color);
}

/* ===== SLIDER & BANNERS SECTION - FIXED ===== */
.grid-row-top-1 {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) auto;
    position: relative;
    align-items: stretch; /* تجعل العناصر بنفس الارتفاع */
}

.grid-col-top-1-1 {
    flex: 1 1 300px; /* مرن مع حد أدنى 300px */
    min-height: 300px; /* ارتفاع أدنى */
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-slow);
    display: flex;
    flex-direction: column;
    /* إصلاح مشكلة height:100% */
    height: auto;
}

.grid-col-top-1-2 {
    flex: 1 1 250px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* ===== CAROUSEL FIX ===== */
#carouselSlider {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    width: 100%;
    flex: 1; /* ليملأ المساحة المتاحة */
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 250px; /* ارتفاع أدنى للكاروسيل */
}

.carousel-inner {
    border-radius: var(--radius-lg);
    width: 100%;
    flex: 1; /* ليملأ المساحة المتاحة */
    position: relative;
    overflow: hidden;
    /* إزالة height: 100% المشكلة */
    height: auto;
}

.carousel-item {
    width: 100%;
    height: 100%;
    position: relative;
}

/* الحل الرئيسي: استخدام aspect-ratio مع object-fit */
.carousel-item img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* يحافظ على نسب الصورة ويقطع الزوائد */
    object-position: center;
    display: block;
    border-radius: var(--radius-lg);
    transition: transform var(--transition-slow);
}

/* تجاوز أنماط Bootstrap الافتراضية التي تسبب المشاكل */
.carousel.slide {
    height: 100%;
    width: 100%;
}

/* ===== BANNER ITEMS ===== */
.banner-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-slow);
    cursor: pointer;
    height: 9.375rem; /* 150px on mobile */
    flex: 1;
    min-height: 150px; /* ارتفاع أدنى */
}

.banner-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.08), rgba(46, 204, 113, 0.08));
    opacity: 0;
    transition: opacity var(--transition-slow);
    pointer-events: none;
    z-index: 1;
}

.banner-item:hover::before,
.banner-item:focus-within::before {
    opacity: 1;
}

.banner-item::after {
    content: '→';
    position: absolute;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    background: rgba(255, 255, 255, 0.95);
    color: var(--primary-color);
    width: 2.5rem; /* 40px on mobile */
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    font-weight: bold;
    opacity: 0;
    transform: translateX(20px);
    transition: all var(--transition-slow);
    box-shadow: var(--shadow-md);
    z-index: 2;
}

.banner-item:hover::after,
.banner-item:focus-within::after {
    opacity: 1;
    transform: translateX(0);
}

.banner-item:hover,
.banner-item:focus-within {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.banner-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-slow);
}

.banner-item:hover img,
.banner-item:focus-within img {
    transform: scale(1.05);
}

.banner-item a {
    display: block;
    height: 100%;
}

/* ===== CAROUSEL CONTROLS ===== */
.carousel-control-prev,
.carousel-control-next {
    width: 3.75rem; /* 60px */
    opacity: 0;
    transition: all var(--transition-base);
    z-index: 10;
}

#carouselSlider:hover .carousel-control-prev,
#carouselSlider:hover .carousel-control-next {
    opacity: 0.8;
}

.carousel-control-prev:hover,
.carousel-control-next:hover,
.carousel-control-prev:focus,
.carousel-control-next:focus {
    opacity: 1 !important;
}

.carousel-control-prev-icon,
.carousel-control-next-icon {
    width: 2.5rem; /* 40px */
    height: 2.5rem;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    padding: var(--spacing-sm);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.carousel-control-prev:hover .carousel-control-prev-icon,
.carousel-control-next:hover .carousel-control-next-icon,
.carousel-control-prev:focus .carousel-control-prev-icon,
.carousel-control-next:focus .carousel-control-next-icon {
    background-color: white;
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.carousel-indicators {
    bottom: var(--spacing-md);
}

.carousel-indicators li {
    width: 0.75rem; /* 12px */
    height: 0.75rem;
    border-radius: 50%;
    margin: 0 0.375rem; /* 6px */
    background-color: rgba(255, 255, 255, 0.6);
    border: 2px solid white;
    transition: all var(--transition-base);
    cursor: pointer;
}

.carousel-indicators li.active {
    width: 2rem; /* 32px */
    border-radius: var(--radius-sm);
    background-color: white;
}

/* ===== FEATURES SECTION ===== */
.section-title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    color: var(--text-primary);
    font-size: clamp(1.5rem, 5vw, 2rem); /* Responsive font size */
    position: relative;
    padding-bottom: var(--spacing-md);
    font-weight: 700;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 6.25rem; /* 100px */
    height: 3px;
    background: linear-gradient(to right, #3498db, #2ecc71);
    border-radius: 2px;
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.feature-card {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-slow);
    border-top: 4px solid #3498db;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, #3498db, #2ecc71);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow);
}

.feature-card:hover,
.feature-card:focus-within {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

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

.feature-icon {
    width: 5rem; /* 80px */
    height: 5rem;
    margin: 0 auto var(--spacing-lg);
    background: linear-gradient(135deg, #3498db, #2ecc71);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem; /* 32px */
    transition: all var(--transition-slow);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
}

.feature-card:hover .feature-icon,
.feature-card:focus-within .feature-icon {
    transform: rotateY(180deg) scale(1.1);
}

.feature-card:nth-child(2) {
    border-top-color: #e74c3c;
}

.feature-card:nth-child(2) .feature-icon {
    background: linear-gradient(135deg, #e74c3c, #e67e22);
    box-shadow: 0 5px 15px rgba(231, 76, 60, 0.3);
}

.feature-card:nth-child(3) {
    border-top-color: #9b59b6;
}

.feature-card:nth-child(3) .feature-icon {
    background: linear-gradient(135deg, #9b59b6, #8e44ad);
    box-shadow: 0 5px 15px rgba(155, 89, 182, 0.3);
}

.feature-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-weight: 600;
}

.feature-text {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: var(--font-size-base);
}

/* ===== PRODUCTS GRID ===== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr)); /* 160px min on mobile */
    gap: var(--spacing-md);
    margin: var(--spacing-xl) 0;
}

.product-card {
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    transition: all var(--transition-slow);
    text-align: center;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.03), rgba(46, 204, 113, 0.03));
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.product-card:hover::before,
.product-card:focus-within::before {
    opacity: 1;
}

.product-card:hover,
.product-card:focus-within {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.product-card img,
.product-image {
    max-width: 100%;
    height: 7.5rem; /* 120px on mobile */
    object-fit: cover;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
    transition: transform var(--transition-slow);
}

.product-card:hover img,
.product-card:focus-within img,
.product-card:hover .product-image,
.product-card:focus-within .product-image {
    transform: scale(1.08);
}

.product-card h5,
.product-title {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    line-height: 1.4;
}

.product-brand {
    font-size: 0.8125rem; /* 13px */
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.product-card .price,
.price {
    font-size: var(--font-size-base);
    font-weight: bold;
    color: var(--danger-color);
    margin: var(--spacing-sm) 0;
}

.discount-badge {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: linear-gradient(135deg, #dc3545, #c82333);
    color: white;
    padding: 0.25rem var(--spacing-xs); /* 4px 8px */
    font-weight: bold;
    border-radius: var(--radius-sm);
    font-size: 0.75rem; /* 12px */
    box-shadow: var(--shadow-md);
    z-index: 2;
    animation: pulse 2s infinite;
}

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

/* Quick Actions */
.quick-actions {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    opacity: 0;
    transition: opacity var(--transition-base);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.product-card:hover .quick-actions,
.product-card:focus-within .quick-actions {
    opacity: 1;
}

.quick-actions button {
    background: white;
    border: none;
    border-radius: 50%;
    width: var(--touch-target-min);
    height: var(--touch-target-min);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    color: var(--text-primary);
    font-size: var(--font-size-lg);
}

.quick-actions button:hover,
.quick-actions button:focus {
    transform: scale(1.15);
    background: var(--primary-color);
    color: white;
}

/* ===== PRODUCT DETAIL PAGE ===== */
.product-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.product-images,
.product-images-slider {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    background: var(--bg-primary);
    box-shadow: var(--shadow-sm);
}

.product-details {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}

.details-content h1,
.details-content h2 {
    font-size: clamp(1.25rem, 4vw, 1.75rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    line-height: 1.3;
}

.details-content h4 {
    font-size: var(--font-size-xl);
    font-weight: bold;
    margin: var(--spacing-md) 0;
    color: var(--primary-color);
}

.price-section {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.button-container {
    margin-top: var(--spacing-lg);
}

/* Slider */
.slider-wrapper {
    position: relative;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
    border-radius: var(--radius-md);
}

.slide {
    display: none;
    width: 100%;
}

.slide.active {
    display: block;
}

.slide img,
.slide video {
    width: 100%;
    height: auto;
    max-height: 18.75rem; /* 300px on mobile */
    object-fit: contain;
    border-radius: var(--radius-md);
}

.prev-slide,
.next-slide {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    border-radius: 50%;
    font-size: var(--font-size-xl);
    z-index: 10;
    transition: all var(--transition-base);
    min-width: var(--touch-target-min);
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
    justify-content: center;
}

.prev-slide {
    right: var(--spacing-sm);
}

.next-slide {
    left: var(--spacing-sm);
}

.prev-slide:hover,
.next-slide:hover,
.prev-slide:focus,
.next-slide:focus {
    background: rgba(0, 0, 0, 0.8);
    transform: translateY(-50%) scale(1.1);
}

.slider-dots {
    text-align: center;
    margin-top: var(--spacing-md);
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.slider-dots .dot {
    height: 0.625rem; /* 10px */
    width: 0.625rem;
    display: inline-block;
    background-color: #bbb;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-base);
    min-width: var(--touch-target-min);
    min-height: var(--touch-target-min);
    position: relative;
}

.slider-dots .dot::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0.625rem;
    height: 0.625rem;
    background: inherit;
    border-radius: 50%;
}

.slider-dots .dot.active {
    background-color: var(--primary-color);
}

.slider-dots .dot:hover {
    background-color: #717171;
}

/* Product Description */
.product-description-container {
    margin-top: var(--spacing-xl);
}

.product-description,
.product-description-content {
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.product-description img {
    max-width: 100% !important;
    height: auto;
    display: block;
    margin: var(--spacing-md) auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.specs-table {
    font-size: var(--font-size-sm);
    margin: var(--spacing-lg) auto;
    width: 100%;
    border-collapse: collapse;
}

.specs-table td,
.specs-table th {
    padding: var(--spacing-sm);
    border: 1px solid var(--border-light);
    word-break: break-word;
}

.specs-table td:first-child,
.specs-table th:first-child {
    font-weight: 600;
    background: var(--bg-secondary);
}

/* Breadcrumb */
.breadcrumb {
    background: transparent;
    padding: var(--spacing-sm) 0;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.breadcrumb-item {
    font-size: var(--font-size-sm);
}

.breadcrumb-item + .breadcrumb-item::before {
    padding: 0 var(--spacing-xs);
}

/* ===== FOOTER ===== */
.site-footer {
    background: #222;
    color: white;
    font-size: var(--font-size-sm);
    line-height: 1.6;
    margin-top: var(--spacing-3xl);
}

.site-footer a {
    color: white;
    text-decoration: none;
    transition: var(--transition-base);
    min-height: var(--touch-target-min);
    display: inline-flex;
    align-items: center;
}

.site-footer a:hover,
.site-footer a:focus {
    color: #f7941d;
}

.footer-top {
    padding: var(--spacing-2xl) 0;
    border-bottom: 1px solid #444;
}

.footer-cols {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.footer-col h5 {
    font-size: var(--font-size-lg);
    font-weight: bold;
    margin-bottom: var(--spacing-md);
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: var(--spacing-sm);
}

.social-icons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.social-icons a {
    font-size: var(--font-size-lg);
    width: var(--touch-target-min);
    height: var(--touch-target-min);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
}

.social-icons a:hover,
.social-icons a:focus {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.contact-info {
    margin-top: var(--spacing-md);
    font-size: 0.8125rem; /* 13px */
    line-height: 1.8;
}

.footer-bottom {
    padding: var(--spacing-lg) 0;
    text-align: center;
    background: #111;
    font-size: 0.8125rem;
}

/* ===== UTILITIES ===== */
.alert {
    border-radius: var(--radius-md);
    border: none;
    box-shadow: var(--shadow-md);
    font-size: var(--font-size-base);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.btn {
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    font-weight: 600;
    min-height: var(--touch-target-min);
    font-size: var(--font-size-base);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    font-family: inherit;
    line-height: 1.5;
}

.btn:hover,
.btn:focus {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

.form-control {
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    font-size: var(--font-size-base);
    min-height: var(--touch-target-min);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-light);
    font-family: inherit;
    width: 100%;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--primary-light);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-primary);
}

.modal-content {
    border-radius: var(--radius-lg);
    border: none;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-light);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.close {
    min-width: var(--touch-target-min);
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    font-size: var(--font-size-2xl);
}

/* Loading State */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 1.875rem; /* 30px */
    height: 1.875rem;
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* Tabs */
.nav-tabs {
    border-bottom: 2px solid var(--border-light);
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.nav-tabs .nav-item {
    margin-bottom: -2px;
}

.nav-tabs .nav-link {
    border: none;
    border-bottom: 2px solid transparent;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-secondary);
    font-weight: 500;
    transition: all var(--transition-base);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-tabs .nav-link:hover,
.nav-tabs .nav-link:focus {
    border-bottom-color: var(--primary-color);
    color: var(--primary-color);
    background: var(--primary-light);
}

.nav-tabs .nav-link.active {
    border-bottom-color: var(--primary-color);
    color: var(--primary-color);
    font-weight: 600;
}

.tab-content {
    padding: var(--spacing-lg) 0;
}

/* Additional Info Grid */
.additional-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(6.25rem, 1fr)); /* 100px min */
    gap: var(--spacing-md);
}

/* ==================== RESPONSIVE BREAKPOINTS ==================== */

/* Small Mobile (320px - 480px) */
@media (max-width: 30em) { /* 480px */
    :root {
        --container-padding: var(--spacing-sm);
    }
    
    .product-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-sm);
    }
    
    .logo img {
        height: 2.1875rem; /* 35px */
    }
    
    .mobile-menu {
        width: 100%;
        max-width: 100vw;
    }
    
    .cart-preview {
        width: calc(100vw - var(--spacing-lg));
    }
    
    /* Carousel mobile adjustments */
    .grid-col-top-1-1 {
        min-height: 200px;
    }
    
    .carousel-item img {
        object-fit: contain;
        background-color: var(--bg-secondary);
    }
}

/* Mobile (481px - 767px) */
@media (min-width: 30.0625em) and (max-width: 47.9375em) { /* 481px - 767px */
    .product-grid {
        grid-template-columns: repeat(auto-fill, minmax(12.5rem, 1fr)); /* 200px min */
    }
    
    .grid-col-top-1-1 {
        min-height: 15.625rem; /* 250px */
    }
}

/* Tablet (768px - 1023px) */
@media (min-width: 48em) { /* 768px */
    .desktop-nav {
        display: block;
    }
    
    .menu-toggle {
        display: none;
    }
    
    .search-bar {
        flex: 1 1 auto;
        max-width: 31.25rem; /* 500px */
    }
    
    .header-main {
        flex-wrap: nowrap;
    }
    
    .grid-row-top-1 {
        flex-direction: row;
        align-items: stretch;
    }
    
    .grid-col-top-1-1 {
        flex: 2;
        min-height: 28.125rem; /* 450px */
    }
    
    .grid-col-top-1-2 {
        flex: 1;
        flex-direction: column;
    }
    
    .banner-item {
        height: calc(50% - 0.75rem); /* 50% - 12px gap */
        width: 100%;
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(17.5rem, 1fr)); /* 280px min */
    }
    
    .product-grid {
        grid-template-columns: repeat(auto-fill, minmax(17.5rem, 1fr)); /* 280px min */
        gap: var(--spacing-lg);
    }
    
    .product-card img,
    .product-image {
        height: 13.75rem; /* 220px */
    }
    
    .product-layout {
        grid-template-columns: 1fr 1fr;
    }
    
    .slide img,
    .slide video {
        max-height: 25rem; /* 400px */
    }
    
    .footer-cols {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .mobile-top-bar {
        flex-wrap: nowrap;
    }
    
    /* Carousel tablet improvements */
    .carousel-item img {
        object-fit: cover;
    }
}

/* Desktop (1024px+) */
@media (min-width: 64em) { /* 1024px */
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-cols {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .product-grid {
        gap: var(--spacing-xl);
    }
    
    .banner-item::after {
        width: 3rem; /* 48px */
        height: 3rem;
    }
    
    .grid-col-top-1-1 {
        min-height: 400px;
    }
}

/* Large Desktop (1200px+) */
@media (min-width: 75em) { /* 1200px */
    .container {
        padding-left: var(--spacing-xl);
        padding-right: var(--spacing-xl);
    }
    
    .grid-col-top-1-1 {
        min-height: 450px;
    }
}

/* ==================== PRINT STYLES ==================== */
@media print {
    .mobile-top-bar,
    .header,
    .mobile-menu,
    .mobile-menu-overlay,
    .menu-toggle,
    .search-bar,
    .cart-dropdown,
    .site-footer,
    .btn,
    button {
        display: none !important;
    }
    
    body {
        background: white;
    }
    
    .container {
        max-width: 100%;
    }
    
    .product-card,
    .feature-card {
        break-inside: avoid;
    }
    
    #carouselSlider {
        height: auto !important;
        min-height: 200px;
    }
    
    .carousel-item img {
        object-fit: contain !important;
        max-height: 200px;
    }
}

/* ==================== REDUCED MOTION ==================== */
@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;
    }
}

/* ==================== DARK MODE SUPPORT (Optional) ==================== */
@media (prefers-color-scheme: dark) {
    /* Uncomment to enable dark mode
    :root {
        --text-primary: #ecf0f1;
        --text-secondary: #bdc3c7;
        --text-muted: #95a5a6;
        --bg-primary: #2c3e50;
        --bg-secondary: #34495e;
        --border-color: #34495e;
        --border-light: #415266;
    }
    */
}

/* ==================== HIGH CONTRAST MODE ==================== */
@media (prefers-contrast: high) {
    :root {
        --shadow-sm: 0 0.125rem 0.5rem rgba(0, 0, 0, 0.3);
        --shadow-md: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.5);
    }
    
    .btn,
    .form-control,
    .product-card,
    .feature-card {
        border-width: 2px;
    }
}

/* ==================== RTL SUPPORT ==================== */
[dir="rtl"] {
    .carousel-control-prev {
        right: auto;
        left: 0;
    }
    
    .carousel-control-next {
        left: auto;
        right: 0;
    }
    
    .mobile-menu {
        right: auto;
        left: -18.75rem;
    }
    
    .mobile-menu.active {
        right: auto;
        left: 0;
    }
    
    .cart-preview {
        right: auto;
        left: 0;
    }
    
    .prev-slide {
        right: auto;
        left: var(--spacing-sm);
    }
    
    .next-slide {
        left: auto;
        right: var(--spacing-sm);
    }
}

/* ==================== FALLBACK FOR ASPECT RATIO ==================== */
@supports not (aspect-ratio: 16/9) {
    .grid-col-top-1-1::before {
        content: '';
        display: block;
        padding-top: 56.25%; /* 16:9 Aspect Ratio */
        width: 100%;
    }
    
    #carouselSlider {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        height: 100%;
    }
    
    .carousel-inner {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
    }
}

/* ==================== CAROUSEL SPECIFIC OVERRIDES ==================== */
/* تجاوز أي أنماط Bootstrap قد تؤثر على العرض */
.carousel {
    height: 100%;
}

.carousel-inner {
    height: 100% !important;
    min-height: 1px; /* منع الانهيار الكامل */
}

/* منع المحتوى من التحرك أثناء التحميل */
.carousel-item {
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

/* توفير نص بديل مرئي إذا فشلت الصورة في التحميل */
.carousel-item img {
    background-color: var(--bg-secondary);
}

/* تحسين الأداء */
.carousel-item img {
    content-visibility: auto;
}