/* ========================================
   ShopHub - Modern PWA Marketplace Styles
   ======================================== */

/* ========== CSS Variables ========== */
:root {
    /* Colors */
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #06b6d4;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --border-color: #e2e8f0;
    --text-color: #334155;
    --text-light: #64748b;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    
    /* Shadows */
    --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 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ========== Reset & Base Styles ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-color);
    padding-bottom: 70px; /* Space for mobile bottom nav */
}

@media (min-width: 768px) {
    body {
        padding-bottom: 0;
    }
}

/* ========== Container ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-xl);
    }
}

/* ========== Desktop Header ========== */
.desktop-header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0.7) 100%);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(148, 163, 184, 0.2);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.desktop-header.scrolled {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.12);
}

.navbar {
    padding: var(--spacing-sm) 0;
}

.navbar .container {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-brand a {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.65rem;
    font-weight: 800;
    color: var(--primary-color);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: transform var(--transition-base), color var(--transition-base);
}

.nav-brand a:hover {
    transform: translateY(-1px) scale(1.01);
    color: var(--primary-dark);
}

.nav-brand .material-icons {
    font-size: 2.25rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    color: transparent;
}

/* Desktop Navigation Menu */
.nav-menu {
    display: none;
    align-items: center;
    gap: var(--spacing-lg);
}

@media (min-width: 992px) {
    .nav-menu {
        display: grid;
        grid-template-columns: auto minmax(200px, 320px) auto;
        align-items: center;
        gap: var(--spacing-xl);
    }
}

.nav-primary,
.nav-actions {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-actions {
    padding-left: var(--spacing-sm);
    border-left: 1px solid rgba(148, 163, 184, 0.2);
}

.nav-menu a {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: calc(var(--spacing-sm) - 2px) var(--spacing-md);
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    position: relative;
    line-height: 1;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    left: var(--spacing-md);
    right: var(--spacing-md);
    bottom: 6px;
    height: 3px;
    border-radius: var(--radius-full);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
    background: var(--gradient-primary);
    opacity: 0.85;
}

.nav-menu a:hover,
.nav-menu a:focus-visible {
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary-dark);
    transform: translateY(-1px);
}

.nav-menu a:hover::after,
.nav-menu a:focus-visible::after,
.nav-menu a.active::after {
    transform: scaleX(1);
}

.nav-menu a.active {
    color: var(--primary-dark);
    background: rgba(37, 99, 235, 0.1);
}

.nav-menu a .material-icons {
    font-size: 1.25rem;
}

.nav-search {
    display: none;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.35rem 0.9rem;
    background: rgba(148, 163, 184, 0.12);
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
    transition: all var(--transition-base);
}

.nav-search:focus-within {
    background: white;
    border-color: rgba(37, 99, 235, 0.25);
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

.nav-search .material-icons {
    font-size: 1.25rem;
    color: var(--primary-color);
}

.nav-search input {
    border: none;
    background: transparent;
    outline: none;
    width: 100%;
    font-weight: 500;
    color: var(--text-color);
}

.nav-search input::placeholder {
    color: rgba(100, 116, 139, 0.8);
}

@media (min-width: 992px) {
    .nav-search {
        display: inline-flex;
    }
}

@media (max-width: 991px) {
    .nav-menu {
        display: none;
    }
}

/* Cart Link */
.cart-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: calc(var(--spacing-sm) - 2px) var(--spacing-md);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.cart-link:hover {
    background: rgba(37, 99, 235, 0.08);
}

.cart-count {
    position: absolute;
    top: -6px;
    right: -4px;
    background: var(--danger-color);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: var(--radius-full);
    min-width: 20px;
    text-align: center;
    box-shadow: 0 8px 15px rgba(239, 68, 68, 0.35);
}

/* Compact Actions */
.nav-actions-compact {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-actions-compact .icon-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: var(--radius-full);
    background: rgba(148, 163, 184, 0.18);
    color: var(--text-color);
    transition: all var(--transition-base);
}

.nav-actions-compact .icon-button:hover {
    background: rgba(37, 99, 235, 0.18);
    color: var(--primary-dark);
}

@media (min-width: 992px) {
    .nav-actions-compact {
        display: none;
    }
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(148, 163, 184, 0.15);
    border: 1px solid rgba(148, 163, 184, 0.3);
    color: var(--text-color);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.mobile-menu-toggle:hover {
    background: rgba(37, 99, 235, 0.12);
    border-color: rgba(37, 99, 235, 0.25);
    color: var(--primary-dark);
}

@media (min-width: 992px) {
    .mobile-menu-toggle {
        display: none;
    }
}

/* Mobile Menu Overlay */
.nav-menu.active {
    position: fixed;
    inset: 0;
    top: 80px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    background: rgba(15, 23, 42, 0.55);
    padding: var(--spacing-lg);
    z-index: var(--z-dropdown);
    animation: fadeIn var(--transition-base);
}

.nav-menu.active::before {
    content: '';
    position: absolute;
    inset: 0;
    backdrop-filter: blur(18px);
    background: linear-gradient(150deg, rgba(15, 23, 42, 0.9) 0%, rgba(30, 64, 175, 0.75) 100%);
    border-radius: var(--radius-lg);
}

.nav-menu.active > * {
    position: relative;
    z-index: 1;
}

.nav-menu.active .nav-primary,
.nav-menu.active .nav-actions {
    flex-direction: column;
    align-items: stretch;
}

.nav-menu.active a {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.nav-menu.active .nav-search {
    display: flex;
    background: rgba(255, 255, 255, 0.12);
    border-color: transparent;
}

.nav-menu.active .nav-search input,
.nav-menu.active .nav-search .material-icons {
    color: white;
}

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

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

/* ========== Mobile Bottom Navigation ========== */
.mobile-bottom-nav {
    display: flex;
    justify-content: space-around;
    align-items: center;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    padding: var(--spacing-sm) 0;
    z-index: var(--z-fixed);
    border-top: 1px solid var(--border-color);
}

@media (min-width: 768px) {
    .mobile-bottom-nav {
        display: none;
    }
}

.mobile-bottom-nav .nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--text-light);
    font-size: 0.75rem;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
    min-width: 60px;
}

.mobile-bottom-nav .nav-item .material-icons {
    font-size: 1.5rem;
    margin-bottom: 2px;
}

.mobile-bottom-nav .nav-item.active {
    color: var(--primary-color);
}

.mobile-bottom-nav .nav-item.active .material-icons {
    animation: bounce 0.5s ease;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.mobile-bottom-nav .cart-badge {
    position: absolute;
    top: 0;
    right: 10px;
    background: var(--danger-color);
    color: white;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 2px 5px;
    border-radius: var(--radius-full);
    min-width: 18px;
    text-align: center;
}

/* ========== Main Content ========== */
main {
    min-height: calc(100vh - 200px);
    padding: var(--spacing-2xl) 0 var(--spacing-xl);
}

/* ========== Hero Section ========== */
.hero-section {
    position: relative;
    display: grid;
    gap: var(--spacing-lg);
    align-items: center;
    justify-items: center;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.95) 0%, rgba(99, 102, 241, 0.85) 100%);
    color: white;
    padding: calc(var(--spacing-2xl) + 1.5rem) var(--spacing-xl);
    margin: var(--spacing-xl) 0;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 45px rgba(37, 99, 235, 0.35);
    overflow: hidden;
    isolation: isolate;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: pulse 15s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.hero-section h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.hero-section p {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
    position: relative;
    z-index: 1;
}

@media (min-width: 768px) {
    .hero-section h1 {
        font-size: 3rem;
    }
    .hero-section p {
        font-size: 1.25rem;
    }
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition-base);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

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

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

.btn .material-icons {
    font-size: 1.25rem;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
}

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

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

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

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

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

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.1rem;
}

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

/* ========== Cards ========== */
.card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* ========== Categories Grid ========== */
.categories-section,
.vendors-section,
.products-section {
    margin: var(--spacing-2xl) 0;
}

.categories-section h2,
.vendors-section h2,
.products-section h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--dark-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .categories-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }
}

.category-card {
    background: white;
    padding: var(--spacing-xl) var(--spacing-md);
    border-radius: var(--radius-xl);
    text-align: center;
    text-decoration: none;
    color: var(--dark-color);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    background: var(--gradient-primary);
    color: white;
}

.category-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.category-card h3 {
    font-size: 1rem;
    font-weight: 600;
}

/* ========== Vendors Grid ========== */
.vendors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.vendor-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.vendor-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.vendor-card h3 {
    color: var(--primary-color);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.vendor-rating {
    color: var(--warning-color);
    margin: var(--spacing-sm) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.vendor-stats {
    display: flex;
    gap: var(--spacing-xl);
    margin: var(--spacing-md) 0;
}

.stat {
    text-align: center;
}

.stat strong {
    display: block;
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 700;
}

.stat span {
    font-size: 0.875rem;
    color: var(--text-light);
}

/* ========== Products Grid ========== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

@media (max-width: 767px) {
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: var(--spacing-md);
    }
}

.product-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.product-image {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

@media (max-width: 767px) {
    .product-image {
        height: 150px;
    }
}

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

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

.badge-sale {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--danger-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.product-info {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-vendor {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.product-category {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

.product-info h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--dark-color);
    line-height: 1.4;
}

@media (max-width: 767px) {
    .product-info h3 {
        font-size: 0.9rem;
    }
}

.product-description {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

@media (max-width: 767px) {
    .product-description {
        display: none;
    }
}

.product-price {
    margin: var(--spacing-sm) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.price-old {
    text-decoration: line-through;
    color: var(--text-light);
    font-size: 0.875rem;
}

.price-new {
    color: var(--primary-color);
    font-size: 1.25rem;
    font-weight: 700;
}

.product-stock {
    margin: var(--spacing-sm) 0;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.in-stock {
    color: var(--success-color);
}

.out-of-stock {
    color: var(--danger-color);
}

.product-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: auto;
}

.product-actions .btn {
    flex: 1;
    font-size: 0.875rem;
    padding: var(--spacing-sm);
}

@media (max-width: 767px) {
    .product-actions {
        flex-direction: column;
    }
}

/* ========== Forms ========== */
.form-control {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-base);
    background: white;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

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

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .form-row {
        grid-template-columns: 1fr 1fr;
    }
}

/* ========== Auth Pages ========== */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 70vh;
    padding: var(--spacing-xl) 0;
}

.auth-box {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 500px;
}

.auth-box h2 {
    margin-bottom: var(--spacing-xl);
    color: var(--dark-color);
    font-size: 1.75rem;
    font-weight: 700;
    text-align: center;
}

.auth-links {
    margin-top: var(--spacing-lg);
    text-align: center;
    color: var(--text-light);
}

.auth-links a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.demo-credentials {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--light-color);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-color);
}

.demo-credentials h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--dark-color);
}

/* ========== Alerts ========== */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    margin: var(--spacing-md) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    animation: slideInDown var(--transition-base);
}

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

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border-left: 4px solid var(--success-color);
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border-left: 4px solid var(--danger-color);
}

/* ========== Cart Page ========== */
.cart-page {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

@media (min-width: 768px) {
    .cart-page {
        grid-template-columns: 2fr 1fr;
    }
}

.cart-table {
    width: 100%;
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.cart-table th,
.cart-table td {
    padding: var(--spacing-md);
    text-align: left;
}

.cart-table thead {
    background: var(--light-color);
    font-weight: 600;
}

.cart-product {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.cart-product img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: var(--radius-md);
}

.cart-summary {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    height: fit-content;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 90px;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    margin: var(--spacing-md) 0;
    font-size: 1rem;
}

.summary-row.total {
    font-size: 1.5rem;
    font-weight: 700;
    border-top: 2px solid var(--border-color);
    padding-top: var(--spacing-md);
    color: var(--primary-color);
}

/* ========== Dashboard ========== */
.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.stat-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.stat-card h3 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.stat-card p {
    color: var(--text-light);
    font-weight: 500;
}

.dashboard-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin: var(--spacing-xl) 0;
}

/* ========== Data Table ========== */
.data-table {
    width: 100%;
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.data-table th,
.data-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table thead {
    background: var(--light-color);
    font-weight: 600;
}

.data-table tbody tr {
    transition: background var(--transition-base);
}

.data-table tbody tr:hover {
    background: var(--light-color);
}

.status-badge {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.status-active {
    background: #d1fae5;
    color: #065f46;
}

.status-pending {
    background: #fef3c7;
    color: #92400e;
}

.status-processing {
    background: #dbeafe;
    color: #1e40af;
}

.status-shipped {
    background: #e0e7ff;
    color: #3730a3;
}

.status-delivered {
    background: #d1fae5;
    color: #065f46;
}

.status-cancelled {
    background: #fee2e2;
    color: #991b1b;
}

/* ========== Footer ========== */
.desktop-footer {
    background: var(--dark-color);
    color: white;
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    display: none;
}

@media (min-width: 768px) {
    .desktop-footer {
        display: block;
    }
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

.footer-section h4 {
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

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

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

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition-base);
}

.footer-section ul li a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    color: white;
    transition: all var(--transition-base);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
}

.pwa-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: rgba(37, 99, 235, 0.2);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
}

/* ========== Scroll to Top Button ========== */
.scroll-top-btn {
    position: fixed;
    bottom: 90px;
    right: var(--spacing-lg);
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    transition: all var(--transition-base);
    z-index: var(--z-fixed);
}

@media (min-width: 768px) {
    .scroll-top-btn {
        bottom: var(--spacing-lg);
    }
}

.scroll-top-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-5px);
}

.scroll-top-btn.show {
    display: flex;
}

/* ========== Filters & Search ========== */
.filters-section {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.filters-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .filters-row {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

/* ========== Loading Spinner ========== */
.spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: var(--radius-full);
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: var(--spacing-xl) auto;
}

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

/* ========== Utility Classes ========== */
.text-center {
    text-align: center;
}

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

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }

.d-flex {
    display: flex;
}

.flex-column {
    flex-direction: column;
}

.align-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }

/* ========== Responsive Utilities ========== */
@media (max-width: 767px) {
    .hide-mobile {
        display: none !important;
    }
}

@media (min-width: 768px) {
    .hide-desktop {
        display: none !important;
    }
}

/* ========== Print Styles ========== */
@media print {
    .mobile-bottom-nav,
    .desktop-header,
    .desktop-footer,
    .scroll-top-btn {
        display: none !important;
    }
    
    body {
        padding-bottom: 0;
    }
}