/* ========================================
   CSS Variables & Theme Tokens
======================================== */
/* ============================================
   SKELETON LOADING STYLES
   ============================================ */

/* ============================================
   SKELETON LOADING STYLES
   ============================================ */

.skeleton-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #f9fafb;
    z-index: 9999;
    display: flex;
    align-items: flex-start;
    padding-top: 100px;
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.skeleton-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.skeleton-wrapper {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 2rem;
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Skeleton Header */
.skeleton-header {
    margin-bottom: 2rem;
}

.skeleton-title {
    width: 220px;
    height: 32px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 8px;
    margin-bottom: 0.75rem;
}

.skeleton-subtitle {
    width: 150px;
    height: 20px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 6px;
}

/* Skeleton Cart Items */
.skeleton-items-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.skeleton-cart-item {
    display: grid;
    grid-template-columns: 200px 1fr auto;
    gap: 1.5rem;
    padding: 1.5rem;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.skeleton-thumbnail {
    width: 200px;
    height: 120px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 8px;
}

.skeleton-details {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.skeleton-text {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 6px;
}

.skeleton-text-title {
    width: 100%;
    max-width: 350px;
    height: 24px;
}

.skeleton-text-subtitle {
    width: 140px;
    height: 18px;
}

.skeleton-text-small {
    width: 100px;
    height: 16px;
}

.skeleton-text-medium {
    width: 140px;
    height: 20px;
}

.skeleton-meta {
    display: flex;
    gap: 1rem;
}

.skeleton-badge {
    width: 80px;
    height: 20px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 20px;
}

.skeleton-price-section {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 1rem;
}

.skeleton-price {
    width: 120px;
    height: 24px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 6px;
}

.skeleton-button {
    width: 100px;
    height: 40px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 8px;
}

.skeleton-button-large {
    width: 100%;
    height: 48px;
    margin-top: 1rem;
}

/* Skeleton Sidebar */
.skeleton-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.skeleton-card {
    padding: 1.5rem;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.skeleton-input {
    width: 100%;
    height: 48px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 8px;
    margin-top: 0.75rem;
}

.skeleton-summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.skeleton-divider {
    width: 100%;
    height: 1px;
    background: #e5e7eb;
    margin: 1rem 0;
}

.skeleton-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 50%;
    margin-bottom: 0.75rem;
}

/* Animation */
@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Responsive */
@media (max-width: 1024px) {
    .skeleton-wrapper {
        grid-template-columns: 1fr;
    }

    .skeleton-cart-item {
        grid-template-columns: 150px 1fr auto;
    }

    .skeleton-thumbnail {
        width: 150px;
        height: 90px;
    }
}

@media (max-width: 640px) {
    .skeleton-cart-item {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .skeleton-thumbnail {
        width: 100%;
        height: 180px;
    }

    .skeleton-price-section {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.cart-page {
    /* Light Theme Colors */
    --cart-surface: #ffffff;
    --cart-surface-2: #f8fafc;
    --cart-surface-3: #f1f5f9;
    --cart-border: #e5e7eb;
    --cart-text: #254892;
    --cart-text-2: #1f2937;
    --cart-text-muted: #6b7280;
    --cart-blue: #3e63d7;
    --cart-blue-dark: #254892;
    --cart-blue-light: #5d8cff;
    --cart-green: #19c38f;
    --cart-amber: #f59e0b;
    --cart-red: #ef4444;
    
    /* Shadows */
    --cart-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --cart-shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --cart-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
    --cart-shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    
    /* Spacing */
    --cart-spacing-xs: 0.5rem;
    --cart-spacing-sm: 0.75rem;
    --cart-spacing-md: 1rem;
    --cart-spacing-lg: 1.5rem;
    --cart-spacing-xl: 2rem;
    --cart-spacing-2xl: 3rem;
    
    /* Border Radius */
    --cart-radius-sm: 0.375rem;
    --cart-radius: 0.5rem;
    --cart-radius-lg: 0.75rem;
    --cart-radius-xl: 1rem;
    
    /* Transitions */
    --cart-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   Dark Theme
======================================== */

.cart-page.cart-dark,
body.dark .cart-page {
    --cart-surface: rgba(15, 23, 42, 0.95);
    --cart-surface-2: #0f172a;
    --cart-surface-3: #1e293b;
    --cart-border: rgba(148, 163, 184, 0.18);
    --cart-text: #e7ecf6;
    --cart-text-2: #e2e8f0;
    --cart-text-muted: #9aa7c2;
    --cart-blue: #5d8cff;
    --cart-blue-dark: #7ea5ff;
    --cart-blue-light: #93b4ff;
    --cart-green: #2dd4a4;
    --cart-amber: #fbbf24;
    --cart-red: #f87171;
    
    --cart-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --cart-shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
    --cart-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4), 0 2px 4px rgba(0, 0, 0, 0.3);
    --cart-shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5), 0 4px 6px rgba(0, 0, 0, 0.3);
}

/* ========================================
   Reset & Base Styles
======================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.cart-page {
    font-family: 'Vazirmatn', 'Segoe UI', Tahoma, Arial, sans-serif;
    background: var(--cart-surface-2);
    color: var(--cart-text-2);
    line-height: 1.6;
    min-height: 100vh;
    transition: var(--cart-transition);
}

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

button {
    font-family: inherit;
    border: none;
    cursor: pointer;
    transition: var(--cart-transition);
}

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

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--cart-spacing-lg);
}

/* ========================================
   Skeleton Loading
======================================== */

.cart-skeleton {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--cart-surface-2);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.cart-skeleton.hidden {
    opacity: 0;
    pointer-events: none;
}

.skeleton-header {
    height: 80px;
    background: var(--cart-surface);
    border-bottom: 1px solid var(--cart-border);
}

.skeleton-content {
    flex: 1;
    max-width: 1280px;
    width: 100%;
    margin: 2rem auto;
    padding: 0 var(--cart-spacing-lg);
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: var(--cart-spacing-xl);
}

.skeleton-item {
    height: 180px;
    background: var(--cart-surface);
    border-radius: var(--cart-radius-lg);
    margin-bottom: var(--cart-spacing-lg);
    animation: skeleton-pulse 1.5s ease-in-out infinite;
}

.skeleton-sidebar {
    height: 400px;
    background: var(--cart-surface);
    border-radius: var(--cart-radius-lg);
    animation: skeleton-pulse 1.5s ease-in-out infinite;
}

@keyframes skeleton-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* ========================================
   Header
======================================== */

.cart-header {
    background: var(--cart-surface);
    border-bottom: 1px solid var(--cart-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--cart-shadow-sm);
}

.header-content {
    display: flex;
    align-items: center;
    gap: var(--cart-spacing-xl);
    padding: var(--cart-spacing-lg) 0;
}

.header-logo {
    flex-shrink: 0;
}

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

.header-nav {
    display: flex;
    gap: var(--cart-spacing-lg);
    margin-left: auto;
}

.nav-link {
    color: var(--cart-text);
    font-weight: 500;
    padding: var(--cart-spacing-xs) var(--cart-spacing-sm);
    border-radius: var(--cart-radius-sm);
    transition: var(--cart-transition);
}

.nav-link:hover {
    color: var(--cart-blue);
    background: var(--cart-surface-3);
}

.header-search {
    position: relative;
    flex: 0 1 400px;
}

.search-input {
    width: 100%;
    padding: var(--cart-spacing-sm) var(--cart-spacing-md);
    padding-right: 2.75rem;
    border: 1px solid var(--cart-border);
    border-radius: var(--cart-radius);
    background: var(--cart-surface-2);
    color: var(--cart-text-2);
    font-size: 0.9375rem;
    outline: none;
    transition: var(--cart-transition);
}

.search-input:focus {
    border-color: var(--cart-blue);
    background: var(--cart-surface);
}

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

.search-icon {
    position: absolute;
    right: var(--cart-spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    color: var(--cart-text-muted);
    pointer-events: none;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--cart-spacing-lg);
}

.cart-icon-wrapper {
    position: relative;
    padding: var(--cart-spacing-xs);
    border-radius: var(--cart-radius);
    color: var(--cart-text);
    transition: var(--cart-transition);
}

.cart-icon-wrapper:hover {
    background: var(--cart-surface-3);
    color: var(--cart-blue);
}

.cart-icon-wrapper.active {
    color: var(--cart-blue);
}

.cart-badge {
    position: absolute;
    top: -4px;
    left: -4px;
    background: var(--cart-red);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.125rem 0.375rem;
    border-radius: 999px;
    min-width: 20px;
    text-align: center;
}

/* Theme Toggle */
.theme-toggle {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
}

.theme-toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--cart-border);
    border-radius: 999px;
    transition: var(--cart-transition);
}

.toggle-slider:before {
    content: "";
    position: absolute;
    height: 20px;
    width: 20px;
    right: 4px;
    bottom: 4px;
    background: white;
    border-radius: 50%;
    transition: var(--cart-transition);
}

.theme-toggle input:checked + .toggle-slider {
    background: var(--cart-blue);
}

.theme-toggle input:checked + .toggle-slider:before {
    transform: translateX(-24px);
}

.btn-login {
    padding: var(--cart-spacing-sm) var(--cart-spacing-lg);
    background: var(--cart-blue);
    color: white;
    border-radius: var(--cart-radius);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: var(--cart-transition);
}

.btn-login:hover {
    background: var(--cart-blue-dark);
    box-shadow: var(--cart-shadow-md);
}

/* ========================================
   Main Content
======================================== */

.cart-main {
    padding: var(--cart-spacing-2xl) 0;
    min-height: calc(100vh - 80px - 300px);
}

.cart-wrapper {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: var(--cart-spacing-2xl);
    align-items: start;
}

/* ========================================
   Cart Items Section
======================================== */

.cart-items-section {
    background: var(--cart-surface);
    border-radius: var(--cart-radius-xl);
    padding: var(--cart-spacing-xl);
    box-shadow: var(--cart-shadow);
}

.section-header {
    margin-bottom: var(--cart-spacing-xl);
    padding-bottom: var(--cart-spacing-lg);
    border-bottom: 1px solid var(--cart-border);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--cart-text);
    margin-bottom: var(--cart-spacing-xs);
}

.section-subtitle {
    font-size: 0.9375rem;
    color: var(--cart-text-muted);
}

/* Cart Item */
.cart-item {
    display: grid;
    grid-template-columns: 200px 1fr auto;
    gap: var(--cart-spacing-lg);
    padding: var(--cart-spacing-lg);
    border: 1px solid var(--cart-border);
    border-radius: var(--cart-radius-lg);
    margin-bottom: var(--cart-spacing-lg);
    transition: var(--cart-transition);
}

.cart-item:hover {
    box-shadow: var(--cart-shadow-md);
    border-color: var(--cart-blue);
}

.cart-item:last-child {
    margin-bottom: 0;
}

.item-thumbnail {
    position: relative;
    border-radius: var(--cart-radius);
    overflow: hidden;
    aspect-ratio: 16 / 9;
}

.item-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.discount-badge {
    position: absolute;
    top: var(--cart-spacing-xs);
    right: var(--cart-spacing-xs);
    background: var(--cart-red);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: var(--cart-radius-sm);
}

.item-details {
    display: flex;
    flex-direction: column;
    gap: var(--cart-spacing-sm);
}

.item-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--cart-text);
    line-height: 1.4;
}

.item-title a {
    transition: var(--cart-transition);
}

.item-title a:hover {
    color: var(--cart-blue);
}

.item-instructor {
    font-size: 0.9375rem;
    color: var(--cart-text-muted);
}

.item-meta {
    display: flex;
    gap: var(--cart-spacing-lg);
    margin-top: auto;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.875rem;
    color: var(--cart-text-muted);
}

.meta-item svg {
    flex-shrink: 0;
}

.item-price-section {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--cart-spacing-md);
    min-width: 160px;
}

.item-price {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.25rem;
}

.price-original {
    font-size: 0.875rem;
    color: var(--cart-text-muted);
    text-decoration: line-through;
}

.price-current {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--cart-blue);
}

.btn-remove {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: var(--cart-spacing-xs) var(--cart-spacing-md);
    background: transparent;
    color: var(--cart-red);
    border: 1px solid var(--cart-border);
    border-radius: var(--cart-radius);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--cart-transition);
}

.btn-remove:hover {
    background: var(--cart-red);
    color: white;
    border-color: var(--cart-red);
}

/* Empty Cart */
.empty-cart {
    text-align: center;
    padding: var(--cart-spacing-2xl) var(--cart-spacing-xl);
}

.empty-icon {
    color: var(--cart-text-muted);
    margin: 0 auto var(--cart-spacing-lg);
}

.empty-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--cart-text);
    margin-bottom: var(--cart-spacing-sm);
}

.empty-text {
    color: var(--cart-text-muted);
    margin-bottom: var(--cart-spacing-xl);
    font-size: 1rem;
}

.btn-browse {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: var(--cart-spacing-md) var(--cart-spacing-xl);
    background: var(--cart-blue);
    color: white;
    border-radius: var(--cart-radius);
    font-weight: 500;
    font-size: 1rem;
    transition: var(--cart-transition);
}

.btn-browse:hover {
    background: var(--cart-blue-dark);
    box-shadow: var(--cart-shadow-md);
}

/* ========================================
   Sidebar: Checkout
======================================== */

.cart-sidebar {
    position: sticky;
    top: 100px;
    display: flex;
    flex-direction: column;
    gap: var(--cart-spacing-lg);
}

.sidebar-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--cart-text);
    margin-bottom: var(--cart-spacing-md);
}

/* Discount Section */
.discount-section {
    background: var(--cart-surface);
    border-radius: var(--cart-radius-lg);
    padding: var(--cart-spacing-lg);
    box-shadow: var(--cart-shadow);
}

.discount-input-wrapper {
    display: flex;
    gap: var(--cart-spacing-sm);
}

.discount-input {
    flex: 1;
    padding: var(--cart-spacing-sm) var(--cart-spacing-md);
    border: 1px solid var(--cart-border);
    border-radius: var(--cart-radius);
    background: var(--cart-surface-2);
    color: var(--cart-text-2);
    font-size: 0.9375rem;
    outline: none;
    transition: var(--cart-transition);
}

.discount-input:focus {
    border-color: var(--cart-blue);
    background: var(--cart-surface);
}

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

.btn-apply-discount {
    padding: var(--cart-spacing-sm) var(--cart-spacing-lg);
    background: var(--cart-blue);
    color: white;
    border-radius: var(--cart-radius);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: var(--cart-transition);
}

.btn-apply-discount:hover {
    background: var(--cart-blue-dark);
}

.btn-apply-discount:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.discount-message {
    margin-top: var(--cart-spacing-sm);
    padding: var(--cart-spacing-sm) var(--cart-spacing-md);
    border-radius: var(--cart-radius);
    font-size: 0.875rem;
    display: none;
}

.discount-message.success {
    display: block;
    background: rgba(25, 195, 143, 0.1);
    color: var(--cart-green);
    border: 1px solid var(--cart-green);
}

.discount-message.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    color: var(--cart-red);
    border: 1px solid var(--cart-red);
}

/* Summary Section */
.summary-section {
    background: var(--cart-surface);
    border-radius: var(--cart-radius-lg);
    padding: var(--cart-spacing-lg);
    box-shadow: var(--cart-shadow);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--cart-spacing-md);
}

.summary-label {
    font-size: 0.9375rem;
    color: var(--cart-text-muted);
}

.summary-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--cart-text-2);
}

.discount-row {
    display: none;
}

.discount-row.active {
    display: flex;
}

.discount-value {
    color: var(--cart-green);
}

.summary-divider {
    height: 1px;
    background: var(--cart-border);
    margin: var(--cart-spacing-lg) 0;
}

.total-row {
    margin-bottom: var(--cart-spacing-xl);
}

.total-row .summary-label {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--cart-text);
}

.total-value {
    font-size: 1.5rem;
    color: var(--cart-blue);
}

.btn-checkout {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: var(--cart-spacing-md) var(--cart-spacing-lg);
    background: var(--cart-green);
    color: white;
    border-radius: var(--cart-radius);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--cart-transition);
    box-shadow: var(--cart-shadow-md);
}

.btn-checkout:hover {
    background: #17b37f;
    box-shadow: var(--cart-shadow-lg);
    transform: translateY(-2px);
}

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

.checkout-note {
    text-align: center;
    font-size: 0.8125rem;
    color: var(--cart-text-muted);
    margin-top: var(--cart-spacing-md);
}

.checkout-note a {
    color: var(--cart-blue);
    text-decoration: underline;
}

.checkout-note a:hover {
    color: var(--cart-blue-dark);
}

/* Guarantee Badge */
.guarantee-badge {
    background: var(--cart-surface);
    border-radius: var(--cart-radius-lg);
    padding: var(--cart-spacing-lg);
    box-shadow: var(--cart-shadow);
    display: flex;
    align-items: center;
    gap: var(--cart-spacing-md);
}

.guarantee-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--cart-text);
    margin-bottom: 0.25rem;
}

.guarantee-text {
    font-size: 0.875rem;
    color: var(--cart-text-muted);
}

/* ========================================
   Suggested Courses Section
======================================== */

.suggested-courses-section {
    margin-top: var(--cart-spacing-2xl);
}

.suggested-courses-section .section-title {
    font-size: 1.75rem;
    margin-bottom: var(--cart-spacing-xl);
    color: var(--cart-text);
}

.suggested-courses-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--cart-spacing-lg);
}

.suggested-course-card {
    background: var(--cart-surface);
    border-radius: var(--cart-radius-lg);
    overflow: hidden;
    box-shadow: var(--cart-shadow);
    transition: var(--cart-transition);
}

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

.course-thumbnail {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.course-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.course-badge {
    position: absolute;
    top: var(--cart-spacing-sm);
    right: var(--cart-spacing-sm);
    padding: 0.25rem 0.625rem;
    border-radius: var(--cart-radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
}

.course-badge.bestseller {
    background: var(--cart-amber);
}

.course-badge.new {
    background: var(--cart-green);
}

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

.course-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--cart-text);
    margin-bottom: var(--cart-spacing-sm);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-instructor {
    font-size: 0.875rem;
    color: var(--cart-text-muted);
    margin-bottom: var(--cart-spacing-md);
}

.course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--cart-spacing-md);
    padding-top: var(--cart-spacing-sm);
    border-top: 1px solid var(--cart-border);
}

.course-rating {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--cart-text-2);
}

.course-price {
    font-size: 1rem;
    font-weight: 700;
    color: var(--cart-blue);
}

.btn-add-to-cart {
    width: 100%;
    padding: var(--cart-spacing-sm) var(--cart-spacing-md);
    background: var(--cart-surface-3);
    color: var(--cart-blue);
    border: 1px solid var(--cart-blue);
    border-radius: var(--cart-radius);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: var(--cart-transition);
}

.btn-add-to-cart:hover {
    background: var(--cart-blue);
    color: white;
}

/* ========================================
   Footer
======================================== */

.cart-footer {
    background: var(--cart-surface);
    border-top: 1px solid var(--cart-border);
    padding: var(--cart-spacing-2xl) 0 var(--cart-spacing-lg);
    margin-top: var(--cart-spacing-2xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--cart-spacing-2xl);
    margin-bottom: var(--cart-spacing-xl);
}

.footer-column {
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--cart-text);
    margin-bottom: var(--cart-spacing-md);
}

/* .footer-text {
    color: var(--cart-text-muted);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: var(--cart-spacing-lg);
} */

.social-links {
    display: flex;
    gap: var(--cart-spacing-sm);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--cart-radius);
    background: var(--cart-surface-3);
    color: var(--cart-text-muted);
    transition: var(--cart-transition);
}

.social-link:hover {
    background: var(--cart-blue);
    color: white;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--cart-spacing-sm);
}

/* .footer-links a {
    color: var(--cart-text-muted);
    font-size: 0.9375rem;
    transition: var(--cart-transition);
} */

.footer-links a:hover {
    color: var(--cart-blue);
}

.footer-contact {
    list-style: none;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: var(--cart-spacing-sm);
    margin-bottom: var(--cart-spacing-md);
    color: var(--cart-text-muted);
    font-size: 0.9375rem;
}

.footer-contact svg {
    flex-shrink: 0;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--cart-spacing-lg);
    border-top: 1px solid var(--cart-border);
}

.footer-bottom p {
    color: var(--cart-text-muted);
    font-size: 0.875rem;
}

/* ========================================
   Responsive Design
======================================== */

@media (max-width: 1024px) {
    .cart-wrapper {
        grid-template-columns: 1fr;
    }
    
    .cart-sidebar {
        position: static;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .suggested-courses-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .skeleton-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
    }
    
    .header-nav {
        order: 3;
        width: 100%;
        justify-content: center;
        padding-top: var(--cart-spacing-md);
        border-top: 1px solid var(--cart-border);
    }
    
    .header-search {
        flex: 1;
        min-width: 200px;
    }
    
    .cart-item {
        grid-template-columns: 1fr;
        gap: var(--cart-spacing-md);
    }
    
    .item-thumbnail {
        width: 100%;
    }
    
.item-price-section {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    .item-price {
        align-items: flex-start;
    }
    
    .suggested-courses-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--cart-spacing-xl);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--cart-spacing-md);
    }
    
    .cart-main {
        padding: var(--cart-spacing-lg) 0;
    }
    
    .cart-items-section {
        padding: var(--cart-spacing-md);
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .cart-item {
        padding: var(--cart-spacing-md);
    }
    
    .item-title {
        font-size: 1rem;
    }
    
    .item-meta {
        flex-direction: column;
        gap: var(--cart-spacing-sm);
    }
    
    .discount-input-wrapper {
        flex-direction: column;
    }
    
    .btn-apply-discount {
        width: 100%;
    }
    
    .summary-section {
        padding: var(--cart-spacing-md);
    }
    
    .total-value {
        font-size: 1.25rem;
    }
    
    .header-actions {
        gap: var(--cart-spacing-sm);
    }
    
    .btn-login {
        padding: var(--cart-spacing-sm) var(--cart-spacing-md);
        font-size: 0.875rem;
    }
}

/* ========================================
   Utility Classes
======================================== */

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

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

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.mt-auto {
    margin-top: auto;
}

.mb-0 {
    margin-bottom: 0 !important;
}

/* ========================================
   Animation Classes
======================================== */

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

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

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

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

.animate-fadeIn {
    animation: fadeIn 0.3s ease-in-out;
}

.animate-slideInUp {
    animation: slideInUp 0.4s ease-out;
}

.animate-slideInDown {
    animation: slideInDown 0.4s ease-out;
}

.animate-scaleIn {
    animation: scaleIn 0.3s ease-out;
}

/* ========================================
   Loading States
======================================== */

.loading {
    pointer-events: none;
    opacity: 0.6;
    position: relative;
}

.loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--cart-blue);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Button Loading State */
.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn-loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    margin: -8px 0 0 -8px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* ========================================
   Toast Notifications
======================================== */

.toast-container {
    position: fixed;
    top: 100px;
    right: var(--cart-spacing-lg);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--cart-spacing-sm);
    max-width: 400px;
}

.toast {
    background: var(--cart-surface);
    border-radius: var(--cart-radius-lg);
    padding: var(--cart-spacing-md) var(--cart-spacing-lg);
    box-shadow: var(--cart-shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--cart-spacing-md);
    animation: slideInDown 0.3s ease-out;
    border-right: 4px solid var(--cart-blue);
}

.toast.success {
    border-right-color: var(--cart-green);
}

.toast.error {
    border-right-color: var(--cart-red);
}

.toast.warning {
    border-right-color: var(--cart-amber);
}

.toast-icon {
    flex-shrink: 0;
}

.toast.success .toast-icon {
    color: var(--cart-green);
}

.toast.error .toast-icon {
    color: var(--cart-red);
}

.toast.warning .toast-icon {
    color: var(--cart-amber);
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    color: var(--cart-text);
    margin-bottom: 0.25rem;
    font-size: 0.9375rem;
}

.toast-message {
    font-size: 0.875rem;
    color: var(--cart-text-muted);
}

.toast-close {
    background: transparent;
    color: var(--cart-text-muted);
    padding: 0.25rem;
    border-radius: var(--cart-radius-sm);
    transition: var(--cart-transition);
}

.toast-close:hover {
    background: var(--cart-surface-3);
    color: var(--cart-text);
}

/* Toast animation out */
.toast.hiding {
    animation: slideOutUp 0.3s ease-out forwards;
}

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

/* ========================================
   Modal / Dialog
======================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--cart-spacing-lg);
    animation: fadeIn 0.3s ease-out;
}

.modal-content {
    background: var(--cart-surface);
    border-radius: var(--cart-radius-xl);
    padding: var(--cart-spacing-xl);
    max-width: 500px;
    width: 100%;
    box-shadow: var(--cart-shadow-lg);
    animation: scaleIn 0.3s ease-out;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--cart-spacing-lg);
    padding-bottom: var(--cart-spacing-md);
    border-bottom: 1px solid var(--cart-border);
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--cart-text);
}

.modal-close {
    background: transparent;
    color: var(--cart-text-muted);
    padding: 0.5rem;
    border-radius: var(--cart-radius);
    transition: var(--cart-transition);
}

.modal-close:hover {
    background: var(--cart-surface-3);
    color: var(--cart-text);
}

.modal-body {
    margin-bottom: var(--cart-spacing-lg);
    color: var(--cart-text-2);
    font-size: 1rem;
    line-height: 1.6;
}

.modal-footer {
    display: flex;
    gap: var(--cart-spacing-md);
    justify-content: flex-end;
}

.btn-modal {
    padding: var(--cart-spacing-sm) var(--cart-spacing-xl);
    border-radius: var(--cart-radius);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: var(--cart-transition);
}

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

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

.btn-modal.secondary {
    background: var(--cart-surface-3);
    color: var(--cart-text);
    border: 1px solid var(--cart-border);
}

.btn-modal.secondary:hover {
    background: var(--cart-surface-2);
}

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

.btn-modal.danger:hover {
    background: #dc2626;
}

/* ========================================
   Tooltip
======================================== */

.tooltip-wrapper {
    position: relative;
    display: inline-block;
}

.tooltip {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--cart-surface-3);
    color: var(--cart-text);
    padding: var(--cart-spacing-xs) var(--cart-spacing-md);
    border-radius: var(--cart-radius);
    font-size: 0.875rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    box-shadow: var(--cart-shadow-md);
    z-index: 1000;
}

.tooltip::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: var(--cart-surface-3);
}

.tooltip-wrapper:hover .tooltip {
    opacity: 1;
}

/* ========================================
   Scroll to Top Button
======================================== */

.scroll-to-top {
    position: fixed;
    bottom: var(--cart-spacing-xl);
    left: var(--cart-spacing-xl);
    width: 48px;
    height: 48px;
    background: var(--cart-blue);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--cart-shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--cart-transition);
    z-index: 999;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    background: var(--cart-blue-dark);
    transform: translateY(-4px);
}

.scroll-to-top:active {
    transform: translateY(-2px);
}

/* ========================================
   Progress Bar
======================================== */

.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--cart-surface-3);
    z-index: 10001;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--cart-blue), var(--cart-blue-light));
    width: 0;
    transition: width 0.3s ease;
}

/* ========================================
   Badge Components
======================================== */

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.625rem;
    border-radius: var(--cart-radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
}

.badge.primary {
    background: rgba(93, 140, 255, 0.15);
    color: var(--cart-blue);
}

.badge.success {
    background: rgba(25, 195, 143, 0.15);
    color: var(--cart-green);
}

.badge.warning {
    background: rgba(251, 191, 36, 0.15);
    color: var(--cart-amber);
}

.badge.danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--cart-red);
}

.badge.neutral {
    background: var(--cart-surface-3);
    color: var(--cart-text-muted);
}

/* ========================================
   Divider
======================================== */

.divider {
    height: 1px;
    background: var(--cart-border);
    margin: var(--cart-spacing-lg) 0;
}

.divider.thick {
    height: 2px;
}

.divider.vertical {
    width: 1px;
    height: auto;
    margin: 0 var(--cart-spacing-md);
}

/* ========================================
   Chip / Tag Components
======================================== */

.chip {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    background: var(--cart-surface-3);
    border: 1px solid var(--cart-border);
    border-radius: 999px;
    font-size: 0.875rem;
    color: var(--cart-text-2);
    transition: var(--cart-transition);
}

.chip.clickable {
    cursor: pointer;
}

.chip.clickable:hover {
    background: var(--cart-surface-2);
    border-color: var(--cart-blue);
    color: var(--cart-blue);
}

.chip.active {
    background: var(--cart-blue);
    border-color: var(--cart-blue);
    color: white;
}

.chip-close {
    background: transparent;
    color: inherit;
    padding: 0;
    margin-right: -0.25rem;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--cart-transition);
}

.chip-close:hover {
    background: rgba(0, 0, 0, 0.1);
}

/* ========================================
   Alert Components
======================================== */

.alert {
    padding: var(--cart-spacing-md) var(--cart-spacing-lg);
    border-radius: var(--cart-radius-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--cart-spacing-md);
    margin-bottom: var(--cart-spacing-lg);
    border-right: 4px solid;
}

.alert-icon {
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
    font-size: 0.9375rem;
}

.alert-message {
    font-size: 0.875rem;
}

.alert.info {
    background: rgba(93, 140, 255, 0.1);
    border-right-color: var(--cart-blue);
}

.alert.info .alert-icon,
.alert.info .alert-title {
    color: var(--cart-blue);
}

.alert.info .alert-message {
    color: var(--cart-text-2);
}

.alert.success {
    background: rgba(25, 195, 143, 0.1);
    border-right-color: var(--cart-green);
}

.alert.success .alert-icon,
.alert.success .alert-title {
    color: var(--cart-green);
}

.alert.success .alert-message {
    color: var(--cart-text-2);
}

.alert.warning {
    background: rgba(251, 191, 36, 0.1);
    border-right-color: var(--cart-amber);
}

.alert.warning .alert-icon,
.alert.warning .alert-title {
    color: var(--cart-amber);
}

.alert.warning .alert-message {
    color: var(--cart-text-2);
}

.alert.error {
    background: rgba(239, 68, 68, 0.1);
    border-right-color: var(--cart-red);
}

.alert.error .alert-icon,
.alert.error .alert-title {
    color: var(--cart-red);
}

.alert.error .alert-message {
    color: var(--cart-text-2);
}

/* ========================================
   Spinner / Loader Components
======================================== */

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--cart-border);
    border-top-color: var(--cart-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner.small {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

.spinner.large {
    width: 60px;
    height: 60px;
    border-width: 4px;
}

.loader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--cart-spacing-lg);
    z-index: 10000;
}

.loader-text {
    color: white;
    font-size: 1rem;
    font-weight: 500;
}

/* ========================================
   Card Hover Effects
======================================== */

.hover-lift {
    transition: var(--cart-transition);
}

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

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(93, 140, 255, 0.3);
}

/* ========================================
   Text Utilities
======================================== */

.text-primary {
    color: var(--cart-blue) !important;
}

.text-success {
    color: var(--cart-green) !important;
}

.text-warning {
    color: var(--cart-amber) !important;
}

.text-danger {
    color: var(--cart-red) !important;
}

.text-muted {
    color: var(--cart-text-muted) !important;
}

.text-bold {
    font-weight: 600;
}

.text-semibold {
    font-weight: 500;
}

.text-sm {
    font-size: 0.875rem;
}

.text-base {
    font-size: 1rem;
}

.text-lg {
    font-size: 1.125rem;
}

.text-xl {
    font-size: 1.25rem;
}

/* ========================================
   Background Utilities
======================================== */

.bg-surface {
    background: var(--cart-surface) !important;
}

.bg-surface-2 {
    background: var(--cart-surface-2) !important;
}

.bg-surface-3 {
    background: var(--cart-surface-3) !important;
}

/* ========================================
   Spacing Utilities
======================================== */

.m-0 { margin: 0 !important; }
.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.ml-0 { margin-left: 0 !important; }
.mr-0 { margin-right: 0 !important; }

.p-0 { padding: 0 !important; }
.pt-0 { padding-top: 0 !important; }
.pb-0 { padding-bottom: 0 !important; }
.pl-0 { padding-left: 0 !important; }
.pr-0 { padding-right: 0 !important; }

/* ========================================
   Print Styles
======================================== */

@media print {
    .cart-header,
    .cart-footer,
    .suggested-courses-section,
    .btn-remove,
    .btn-checkout,
    .discount-section,
    .scroll-to-top,
    .toast-container {
        display: none !important;
    }
    
    .cart-page {
        background: white;
        color: black;
    }
    
    .cart-wrapper {
        display: block;
    }
    
    .cart-sidebar {
        page-break-before: always;
    }
    
    .cart-item {
        page-break-inside: avoid;
    }
}

/* ========================================
   Accessibility Enhancements
======================================== */

.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;
}

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

button:focus-visible,
a:focus-visible,
input:focus-visible {
    outline: 2px solid var(--cart-blue);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .cart-page {
        --cart-border: #000;
    }
    
    .cart-page.cart-dark,
    body.dark .cart-page {
        --cart-border: #fff;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ========================================
   END OF STYLESHEET
======================================== */