/* Mobile-First Responsive CSS for TechMart */

/* CSS Reset */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS Custom Properties */
:root {
    /* Colors */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #f59e0b;
    --accent-color: #ef4444;
    --success-color: #10b981;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --border-color: #e5e7eb;
    --border-light: #f3f4f6;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* Spacing - Mobile First */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 12px;
    --space-lg: 16px;
    --space-xl: 20px;
    --space-2xl: 24px;
    --space-3xl: 32px;
    --space-4xl: 40px;
    --space-5xl: 48px;
    --space-6xl: 64px;
    
    /* Container */
    --container-padding: var(--space-lg);
    --container-max-width: 1200px;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 30px;
    --font-size-4xl: 36px;
    
    /* Line Heights */
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;
}

/* Base Styles */
html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Typography - Mobile First */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: var(--leading-tight);
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

h1 {
    font-size: clamp(1.75rem, 4vw, 3rem);
    margin-bottom: var(--space-xl);
}

h2 {
    font-size: clamp(1.5rem, 3.5vw, 2.25rem);
    margin-bottom: var(--space-lg);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.875rem);
    margin-bottom: var(--space-md);
}

h4 {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    margin-bottom: var(--space-md);
}

p {
    margin-bottom: var(--space-lg);
    line-height: var(--leading-relaxed);
    color: var(--text-secondary);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

/* Button System - Mobile First */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border: none;
    border-radius: var(--radius);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: var(--shadow-sm);
    background: var(--primary-color);
    color: white;
    min-height: 44px; /* Touch-friendly */
    min-width: 44px;
    text-align: center;
    user-select: none;
    -webkit-user-select: none;
    position: relative;
    overflow: hidden;
}

.btn:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: var(--shadow-sm);
}

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

/* Button Variants */
.btn-sm {
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-xs);
    min-height: 36px;
}

.btn-lg {
    padding: var(--space-xl) var(--space-3xl);
    font-size: var(--font-size-base);
    min-height: 52px;
}

.btn-secondary {
    background: var(--text-secondary);
    color: white;
}

.btn-secondary:hover:not(:disabled) {
    background: var(--text-primary);
}

.btn-accent {
    background: var(--accent-color);
}

.btn-accent:hover:not(:disabled) {
    background: #dc2626;
}

.btn-success {
    background: var(--success-color);
}

.btn-success:hover:not(:disabled) {
    background: #059669;
}

.btn-warning {
    background: var(--secondary-color);
}

.btn-warning:hover:not(:disabled) {
    background: #d97706;
}

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

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

/* Header - Mobile First */
.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    width: 100%;
}

.promo-bar {
    background: linear-gradient(135deg, var(--accent-color), #dc2626);
    color: white;
    text-align: center;
    padding: var(--space-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.header-main {
    padding: var(--space-md) 0;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.logo {
    display: flex;
    align-items: center;
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--primary-color);
    text-decoration: none;
    white-space: nowrap;
    flex-shrink: 0;
}

.logo i {
    margin-right: var(--space-sm);
    color: var(--secondary-color);
    font-size: 1.2em;
}

.search-container {
    flex: 1;
    min-width: 200px;
    max-width: 400px;
    order: 3;
    width: 100%;
}

.search-bar {
    display: flex;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color var(--transition);
    background: var(--bg-primary);
}

.search-bar:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 1px var(--primary-color);
}

.search-bar input {
    flex: 1;
    padding: var(--space-md);
    border: none;
    font-size: var(--font-size-base); /* Prevent zoom on iOS */
    outline: none;
    background: transparent;
    color: var(--text-primary);
}

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

.search-bar button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--space-md) var(--space-lg);
    cursor: pointer;
    font-weight: 500;
    transition: background-color var(--transition);
    min-width: 44px; /* Touch-friendly */
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-bar button:hover {
    background: var(--primary-dark);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    order: 2;
}

/* Navigation - Mobile First */
.nav {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.nav::-webkit-scrollbar {
    display: none;
}

.nav ul {
    list-style: none;
    display: flex;
    gap: 0;
    padding: var(--space-sm) 0;
    min-width: max-content;
}

.nav li {
    flex-shrink: 0;
}

.nav a {
    color: var(--text-primary);
    text-decoration: none;
    padding: var(--space-md) var(--space-lg);
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: all var(--transition);
    position: relative;
    white-space: nowrap;
    border-radius: var(--radius-sm);
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav a:hover {
    color: var(--primary-color);
    background: var(--bg-secondary);
}

.nav a:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Cart Components - Mobile First */
.cart-wrapper {
    position: relative;
}

.cart-button {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    transition: all var(--transition);
    text-decoration: none;
    color: var(--text-primary);
    min-height: 44px;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.cart-button:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.cart-count {
    background: var(--accent-color);
    color: white;
    border-radius: var(--radius-full);
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xs);
    font-weight: 700;
    position: absolute;
    top: -8px;
    right: -8px;
    line-height: 1;
}

/* Card Components - Mobile First */
.card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    margin-bottom: var(--space-lg);
    transition: all var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.product-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow);
    transition: all var(--transition);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* Product Image System */
.product-image, 
.product-main-image {
    width: 100%;
    aspect-ratio: 1;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-lg);
    overflow: hidden;
    position: relative;
}

.product-main-image {
    aspect-ratio: 4/3;
    margin-bottom: var(--space-xl);
}

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

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

/* Fallback for missing images */
.product-image:empty::before, 
.product-main-image:empty::before {
    content: '\f02f';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 2rem;
    color: var(--text-light);
}

.product-main-image:empty::before {
    font-size: 3rem;
}

/* Form Elements - Mobile First */
.form-group {
    margin-bottom: var(--space-xl);
}

.form-row {
    display: flex;
    gap: var(--space-lg);
    flex-direction: column;
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    font-size: var(--font-size-sm);
}

.form-input, 
.form-select, 
.form-textarea {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    font-size: var(--font-size-base); /* Prevent zoom on iOS */
    transition: all var(--transition);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 44px; /* Touch-friendly */
}

.form-input:focus, 
.form-select:focus, 
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 1px var(--primary-color);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-light);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
    line-height: var(--leading-relaxed);
}

/* Grid System - Mobile First */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-cols-1 { 
    grid-template-columns: 1fr; 
}

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

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }

.hidden { display: none !important; }
.block { display: block !important; }
.inline-block { display: inline-block !important; }

/* Spacing utilities */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }
.mt-6 { margin-top: var(--space-2xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }
.mb-6 { margin-bottom: var(--space-2xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--space-xs); }
.p-2 { padding: var(--space-sm); }
.p-3 { padding: var(--space-md); }
.p-4 { padding: var(--space-lg); }
.p-5 { padding: var(--space-xl); }
.p-6 { padding: var(--space-2xl); }

.w-full { width: 100%; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

/* Responsive Images */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Notification System */
.notification {
    position: fixed;
    top: var(--space-xl);
    left: var(--space-lg);
    right: var(--space-lg);
    max-width: 400px;
    margin: 0 auto;
    padding: var(--space-lg);
    background: var(--success-color);
    color: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    display: none;
    z-index: var(--z-toast);
    font-weight: 500;
    font-size: var(--font-size-sm);
}

.notification.show {
    display: block;
    animation: slideDown 0.3s ease-out;
}

.notification.error {
    background: var(--accent-color);
}

@keyframes slideDown {
    from { 
        transform: translateY(-100%); 
        opacity: 0; 
    }
    to { 
        transform: translateY(0); 
        opacity: 1; 
    }
}

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

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

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

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--primary-color);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

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

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

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: var(--space-sm);
    background: var(--primary-color);
    color: white;
    padding: var(--space-sm);
    text-decoration: none;
    border-radius: var(--radius-sm);
    z-index: var(--z-modal);
    font-weight: 500;
    font-size: var(--font-size-sm);
}

.skip-link:focus {
    top: var(--space-sm);
}

/* ===== TABLET BREAKPOINT (640px+) ===== */
@media (min-width: 640px) {
    :root {
        --container-padding: var(--space-xl);
    }
    
    .search-container {
        order: 0;
        width: auto;
        flex: 1;
        max-width: 400px;
    }
    
    .header-actions {
        order: 0;
        gap: var(--space-lg);
    }
    
    .form-row {
        flex-direction: row;
    }
    
    .grid-cols-2 { 
        grid-template-columns: repeat(2, 1fr); 
    }
    
    .notification {
        right: var(--space-xl);
        left: auto;
        max-width: 400px;
    }
}

/* ===== TABLET LARGE BREAKPOINT (768px+) ===== */
@media (min-width: 768px) {
    :root {
        --container-padding: var(--space-2xl);
    }

    .header-content {
        flex-wrap: nowrap;
        gap: var(--space-2xl);
    }

    .logo {
        font-size: var(--font-size-2xl);
    }

    .search-container {
        max-width: 500px;
    }

    .nav {
        padding: var(--space-lg) 0;
        overflow-x: visible;
    }
    
    .nav ul {
        gap: var(--space-2xl);
        justify-content: center;
        min-width: auto;
    }
    
    .nav a {
        font-size: var(--font-size-base);
        padding: var(--space-md) var(--space-lg);
    }

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

    .card, 
    .product-card {
        padding: var(--space-2xl);
    }
}

/* ===== DESKTOP BREAKPOINT (1024px+) ===== */
@media (min-width: 1024px) {
    :root {
        --container-padding: var(--space-3xl);
    }

    .header-main {
        padding: var(--space-xl) 0;
    }

    .header-content {
        gap: var(--space-3xl);
    }

    .logo {
        font-size: var(--font-size-3xl);
    }

    .search-container {
        max-width: 600px;
    }

    .header-actions {
        gap: var(--space-2xl);
    }

    .nav ul {
        gap: var(--space-3xl);
    }

    .grid-cols-4 { 
        grid-template-columns: repeat(4, 1fr); 
    }

    .card, 
    .product-card {
        padding: var(--space-3xl);
    }

    .product-card:hover {
        transform: translateY(-8px);
    }

    .btn {
        padding: var(--space-lg) var(--space-3xl);
        font-size: var(--font-size-base);
    }

    .btn-sm {
        padding: var(--space-md) var(--space-xl);
        font-size: var(--font-size-sm);
    }

    .btn-lg {
        padding: var(--space-xl) var(--space-4xl);
        font-size: var(--font-size-lg);
    }
}

/* ===== LARGE DESKTOP BREAKPOINT (1280px+) ===== */
@media (min-width: 1280px) {
    .container {
        max-width: 1280px;
    }

    .grid-cols-5 { 
        grid-template-columns: repeat(5, 1fr); 
    }
    
    .grid-cols-6 { 
        grid-template-columns: repeat(6, 1fr); 
    }
}

/* ===== EXTRA LARGE DESKTOP BREAKPOINT (1536px+) ===== */
@media (min-width: 1536px) {
    .container {
        max-width: 1536px;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .header, 
    .nav, 
    .cart-button, 
    .btn, 
    .notification,
    .search-container {
        display: none !important;
    }

    body {
        background: white !important;
        color: black !important;
        font-size: 12pt !important;
    }

    .card, 
    .product-card {
        box-shadow: none !important;
        border: 1px solid #000 !important;
        break-inside: avoid;
    }
    
    h1, h2, h3, h4, h5, h6 {
        color: black !important;
    }
    
    a {
        color: black !important;
        text-decoration: underline !important;
    }
}

/* ===== HIGH CONTRAST MODE ===== */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-secondary: #000000;
        --shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
        --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.5);
        --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.5);
    }
    
    .btn {
        border: 2px solid currentColor;
    }
    
    .form-input,
    .form-select,
    .form-textarea {
        border-width: 2px;
    }
}

/* ===== 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 ===== */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #f9fafb;
        --text-secondary: #d1d5db;
        --text-light: #9ca3af;
        --bg-primary: #1f2937;
        --bg-secondary: #111827;
        --bg-tertiary: #0f172a;
        --border-color: #374151;
        --border-light: #4b5563;
    }
    
    .search-bar {
        background: var(--bg-secondary);
    }
    
    .form-input,
    .form-select,
    .form-textarea {
        background: var(--bg-secondary);
    }
}

/* ===== MOBILE SPECIFIC STYLES ===== */
@media (max-width: 639px) {
    /* Mobile header adjustments */
    .header-content {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .logo {
        order: 1;
        align-self: center;
    }
    
    .header-actions {
        order: 2;
        justify-content: center;
        width: 100%;
    }
    
    .search-container {
        order: 3;
        width: 100%;
        max-width: none;
    }
    
    /* Mobile navigation */
    .nav {
        border-top: none;
        background: var(--bg-secondary);
    }
    
    .nav ul {
        padding: var(--space-md) 0;
        justify-content: flex-start;
    }
    
    .nav a {
        padding: var(--space-md);
        font-size: var(--font-size-sm);
        border-radius: var(--radius);
        background: var(--bg-primary);
        border: 1px solid var(--border-color);
    }
    
    /* Mobile cards */
    .product-card {
        padding: var(--space-lg);
        margin-bottom: var(--space-md);
    }
    
    .product-card:hover {
        transform: none;
    }
    
    /* Mobile buttons */
    .btn {
        width: 100%;
        justify-content: center;
        padding: var(--space-lg);
        font-size: var(--font-size-base);
    }
    
    .btn-group {
        display: flex;
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .btn-group .btn {
        width: 100%;
    }
    
    /* Mobile forms */
    .form-input,
    .form-select,
    .form-textarea {
        font-size: 16px; /* Prevent zoom on iOS */
        padding: var(--space-lg);
    }
    
    /* Mobile grid adjustments */
    .grid {
        gap: var(--space-md);
    }
    
    .grid-cols-2 {
        grid-template-columns: 1fr;
    }
    
    /* Mobile spacing adjustments */
    .container {
        padding-left: var(--space-lg);
        padding-right: var(--space-lg);
    }
    
    /* Mobile typography */
    h1 {
        font-size: var(--font-size-2xl);
        text-align: center;
        margin-bottom: var(--space-lg);
    }
    
    h2 {
        font-size: var(--font-size-xl);
        text-align: center;
        margin-bottom: var(--space-md);
    }
    
    /* Mobile cart */
    .cart-button {
        padding: var(--space-md);
        min-width: auto;
    }
    
    .cart-button span:not(.cart-count) {
        display: none;
    }
    
    /* Mobile notifications */
    .notification {
        left: var(--space-md);
        right: var(--space-md);
        top: var(--space-md);
        font-size: var(--font-size-sm);
    }
}

/* ===== EXTRA SMALL MOBILE (320px+) ===== */
@media (max-width: 374px) {
    :root {
        --container-padding: var(--space-md);
    }
    
    .logo {
        font-size: var(--font-size-lg);
    }
    
    .header-actions {
        gap: var(--space-sm);
    }
    
    .nav a {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--font-size-xs);
    }
    
    .btn {
        padding: var(--space-md) var(--space-lg);
        font-size: var(--font-size-sm);
    }
    
    h1 {
        font-size: var(--font-size-xl);
    }
    
    h2 {
        font-size: var(--font-size-lg);
    }
}

/* ===== TOUCH DEVICE OPTIMIZATIONS ===== */
@media (hover: none) and (pointer: coarse) {
    .btn:hover,
    .cart-button:hover,
    .nav a:hover,
    .product-card:hover {
        transform: none;
        box-shadow: var(--shadow);
    }
    
    .btn:active,
    .cart-button:active,
    .nav a:active {
        transform: scale(0.98);
    }
    
    /* Larger touch targets */
    .btn,
    .cart-button,
    .nav a,
    .form-input,
    .form-select {
        min-height: 48px;
    }
    
    /* Remove hover states on touch devices */
    .product-image:hover img,
    .product-main-image:hover img {
        transform: none;
    }
}

/* ===== LANDSCAPE PHONE OPTIMIZATION ===== */
@media (max-height: 500px) and (orientation: landscape) {
    .header-main {
        padding: var(--space-sm) 0;
    }
    
    .nav {
        padding: var(--space-sm) 0;
    }
    
    .logo {
        font-size: var(--font-size-lg);
    }
    
    .search-bar input,
    .btn {
        padding: var(--space-sm) var(--space-md);
    }
}

/* ===== RTL SUPPORT ===== */
[dir="rtl"] {
    .logo i {
        margin-right: 0;
        margin-left: var(--space-sm);
    }
    
    .cart-count {
        right: auto;
        left: -8px;
    }
    
    .nav a::after {
        right: 0;
        left: auto;
    }
}

/* ===== SMOOTH SCROLLING FOR SUPPORTED BROWSERS ===== */
@supports (scroll-behavior: smooth) {
    html {
        scroll-behavior: smooth;
    }
}

/* ===== CUSTOM SCROLLBAR ===== */
@media (min-width: 768px) {
    ::-webkit-scrollbar {
        width: 8px;
        height: 8px;
    }
    
    ::-webkit-scrollbar-track {
        background: var(--bg-secondary);
    }
    
    ::-webkit-scrollbar-thumb {
        background: var(--border-color);
        border-radius: var(--radius-full);
    }
    
    ::-webkit-scrollbar-thumb:hover {
        background: var(--text-light);
    }
}

/* ===== SAFE AREA SUPPORT FOR MOBILE DEVICES ===== */
@supports (padding: max(0px)) {
    .header {
        padding-left: max(var(--container-padding), env(safe-area-inset-left));
        padding-right: max(var(--container-padding), env(safe-area-inset-right));
    }
    
    .container {
        padding-left: max(var(--container-padding), env(safe-area-inset-left));
        padding-right: max(var(--container-padding), env(safe-area-inset-right));
    }
    
    .notification {
        left: max(var(--space-lg), env(safe-area-inset-left));
        right: max(var(--space-lg), env(safe-area-inset-right));
        top: max(var(--space-xl), env(safe-area-inset-top));
    }
}

/* ===== ANIMATION UTILITIES ===== */
.fade-in {
    animation: fadeIn 0.3s ease-in-out;
}

.fade-out {
    animation: fadeOut 0.3s ease-in-out;
}

.slide-up {
    animation: slideUp 0.3s ease-out;
}

.slide-down {
    animation: slideDown 0.3s ease-out;
}

.scale-in {
    animation: scaleIn 0.2s ease-out;
}

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

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

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

@keyframes scaleIn {
    from { 
        transform: scale(0.95); 
        opacity: 0; 
    }
    to { 
        transform: scale(1); 
        opacity: 1; 
    }
}