/* ============================================
   NEPALI E-COMMERCE PLATFORM - STYLES
   Milestone 5: Advanced Prototype
   Enhanced with search, filters, modals, checkout, settings
   ============================================ */

/* CSS VARIABLES */
:root {
    --primary-red: #DC143C;
    --primary-blue: #003893;
    --white: #FFFFFF;
    --bg-light: #F5F5F5;
    --bg-white: #FFFFFF;
    --text-dark: #333333;
    --text-gray: #666666;
    --text-light: #999999;
    --border-gray: #DDDDDD;
    --success-green: #28A745;
    --warning-orange: #FFA500;
    --error-red: #DC3545;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 16px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);
    --transition: 0.3s ease;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

html {
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; border: none; }

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-blue);
    color: var(--white);
    padding: 8px 16px;
    z-index: 1000;
    transition: top 0.3s;
}
.skip-link:focus { top: 0; }

/* ============================================
   LAYOUT
   ============================================ */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* ============================================
   HEADER
   ============================================ */

header {
    background-color: var(--primary-red);
    color: var(--white);
    padding: var(--spacing-md) 0;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-link { color: var(--white); }
.logo { font-size: 1.4rem; font-weight: 700; }

header nav {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

header nav a {
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition);
    font-weight: 500;
    font-size: 0.95rem;
}

header nav a:hover,
header nav a.active {
    background-color: rgba(255, 255, 255, 0.2);
}

.cart-badge {
    background-color: var(--primary-blue);
    color: var(--white);
    border-radius: 50%;
    padding: 2px 7px;
    font-size: 0.75rem;
    font-weight: bold;
    margin-left: 4px;
    transition: transform 0.2s ease;
}

.settings-link { font-size: 1.1rem; }

/* ============================================
   MAIN CONTENT
   ============================================ */

main {
    padding: var(--spacing-lg) var(--spacing-sm);
    min-height: calc(100vh - 200px);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    text-align: center;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.hero h2 {
    font-size: 1.8rem;
    color: var(--primary-red);
    margin-bottom: var(--spacing-xs);
}

.hero p {
    font-size: 1.05rem;
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   SEARCH BAR
   ============================================ */

.search-section {
    margin-bottom: var(--spacing-md);
}

.search-bar {
    position: relative;
    max-width: 500px;
    margin: 0 auto var(--spacing-xs);
}

.search-bar input {
    width: 100%;
    padding: 12px 40px 12px 16px;
    border: 2px solid var(--border-gray);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color var(--transition);
    background: var(--bg-white);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary-red);
    box-shadow: 0 0 0 3px rgba(220, 20, 60, 0.1);
}

.search-clear-btn {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    font-size: 1.3rem;
    color: var(--text-light);
    cursor: pointer;
    padding: 4px 8px;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.results-count {
    display: block;
    text-align: center;
    color: var(--text-gray);
    font-size: 0.875rem;
}

/* ============================================
   CATEGORY FILTERS
   ============================================ */

.filter-section {
    margin-bottom: var(--spacing-lg);
}

.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.category-btn {
    padding: 8px 16px;
    border: 2px solid var(--border-gray);
    border-radius: 20px;
    background: var(--bg-white);
    color: var(--text-dark);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    min-height: 44px;
    white-space: nowrap;
}

.category-btn:hover {
    border-color: var(--primary-red);
    color: var(--primary-red);
}

.category-btn.active {
    background-color: var(--primary-red);
    border-color: var(--primary-red);
    color: var(--white);
}

/* ============================================
   PRODUCTS GRID
   ============================================ */

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.product-card {
    background-color: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.product-image-container {
    position: relative;
    cursor: pointer;
    overflow: hidden;
}

.product-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    background-color: var(--bg-light);
    transition: transform var(--transition);
}

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

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.6));
    color: var(--white);
    padding: 30px 16px 12px;
    text-align: center;
    font-weight: 600;
    font-size: 0.9rem;
    opacity: 0;
    transition: opacity var(--transition);
}

.product-image-container:hover .image-overlay {
    opacity: 1;
}

.product-info {
    padding: var(--spacing-md);
}

.product-category-tag {
    display: inline-block;
    padding: 2px 10px;
    background-color: var(--bg-light);
    color: var(--text-gray);
    border-radius: 12px;
    font-size: 0.75rem;
    text-transform: capitalize;
    margin-bottom: var(--spacing-xs);
}

.product-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-dark);
}

.product-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-red);
    margin-bottom: var(--spacing-xs);
}

.product-description {
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-bottom: var(--spacing-xs);
    line-height: 1.5;
}

.product-origin {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

/* No results */
.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-xl);
}

.no-results h3 {
    color: var(--text-gray);
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-align: center;
    transition: all var(--transition);
    min-height: 44px;
    min-width: 44px;
    font-size: 0.95rem;
}

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

.btn-primary:hover {
    background-color: #B8102F;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--bg-light);
    color: var(--text-dark);
    border: 1px solid var(--border-gray);
}

.btn-secondary:hover { background-color: var(--border-gray); }
.btn-full { width: 100%; }
.btn-sm { padding: 8px 16px; font-size: 0.875rem; }

/* ============================================
   MODAL (Product Detail & Checkout)
   ============================================ */

.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    opacity: 0;
    transition: opacity 0.3s ease;
    overflow-y: auto;
}

.modal-overlay.show { opacity: 1; }

.modal-content {
    background-color: var(--bg-white);
    border-radius: var(--radius-lg);
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: translateY(20px);
    transition: transform 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.modal-overlay.show .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 12px; right: 12px;
    width: 40px; height: 40px;
    border: none;
    background-color: var(--bg-light);
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition);
}

.modal-close:hover { background-color: var(--border-gray); }

.modal-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.modal-image-section {
    background-color: var(--bg-light);
}

.modal-product-image {
    width: 100%;
    height: 100%;
    min-height: 300px;
    object-fit: cover;
}

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

.modal-product-name {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.modal-product-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-red);
    margin-bottom: var(--spacing-sm);
}

.modal-product-description {
    color: var(--text-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.cultural-context,
.artisan-info {
    background-color: var(--bg-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.cultural-context h3,
.artisan-info h3 {
    font-size: 0.95rem;
    color: var(--primary-red);
    margin-bottom: var(--spacing-xs);
}

.cultural-context p,
.artisan-info p {
    font-size: 0.9rem;
    color: var(--text-gray);
    line-height: 1.6;
}

.modal-actions {
    margin-top: var(--spacing-md);
}

/* ============================================
   CHECKOUT MODAL
   ============================================ */

.checkout-modal-content {
    max-width: 600px;
}

.checkout-form-container {
    padding: var(--spacing-lg);
}

.checkout-form-container h2 {
    margin-bottom: var(--spacing-md);
}

.checkout-form-container h3 {
    font-size: 1rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--border-gray);
}

.checkout-order-summary {
    background-color: var(--bg-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.checkout-item {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
    font-size: 0.9rem;
}

.checkout-total {
    border-top: 2px solid var(--border-gray);
    margin-top: var(--spacing-xs);
    padding-top: var(--spacing-xs);
    text-align: right;
    font-size: 1.1rem;
}

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

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 4px;
    color: var(--text-dark);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-gray);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-red);
    box-shadow: 0 0 0 3px rgba(220, 20, 60, 0.1);
}

.payment-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: var(--spacing-md);
}

.payment-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px;
    border: 1px solid var(--border-gray);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: border-color var(--transition);
}

.payment-option:hover { border-color: var(--primary-red); }

.payment-label { font-weight: 500; }

.checkout-note {
    font-size: 0.8rem;
    color: var(--text-light);
    text-align: center;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-xs);
    background: #FFF3CD;
    border-radius: var(--radius-sm);
}

/* ============================================
   ORDER CONFIRMATION MODAL
   ============================================ */

.confirmation-modal-content {
    max-width: 500px;
    text-align: center;
}

.confirmation-content {
    padding: var(--spacing-xl);
}

.confirmation-icon {
    width: 80px; height: 80px;
    background-color: var(--success-green);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto var(--spacing-md);
}

.order-number {
    color: var(--text-gray);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.confirmation-details {
    background-color: var(--bg-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.confirmation-details p { margin-bottom: var(--spacing-xs); }

.confirmation-note {
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-bottom: var(--spacing-sm);
}

.prototype-note {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-xs);
    background: #FFF3CD;
    border-radius: var(--radius-sm);
}

/* ============================================
   CART PAGE STYLES
   ============================================ */

.cart-container {
    background-color: var(--bg-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.empty-cart {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

.empty-cart h3 {
    font-size: 1.5rem;
    color: var(--text-gray);
    margin-bottom: var(--spacing-sm);
}

.empty-cart p {
    color: var(--text-gray);
    margin-bottom: var(--spacing-lg);
}

.cart-item {
    display: grid;
    grid-template-columns: 100px 1fr auto auto auto;
    gap: var(--spacing-md);
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-gray);
    position: relative;
}

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

.cart-item-image {
    width: 100px; height: 100px;
    object-fit: cover;
    border-radius: var(--radius-md);
}

.cart-item-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.cart-item-price {
    color: var(--text-gray);
    font-size: 0.875rem;
}

.cart-item-quantity {
    display: flex;
    align-items: center;
    gap: 8px;
}

.quantity-btn {
    width: 36px; height: 36px;
    border: 1px solid var(--border-gray);
    background-color: var(--bg-white);
    border-radius: var(--radius-sm);
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    min-width: 44px;
    min-height: 44px;
}

.quantity-btn:hover {
    background-color: var(--bg-light);
    border-color: var(--primary-red);
}

.quantity-input {
    width: 50px; height: 36px;
    text-align: center;
    border: 1px solid var(--border-gray);
    border-radius: var(--radius-sm);
    font-size: 1rem;
}

.cart-item-total {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-red);
    min-width: 80px;
    text-align: right;
}

.cart-item-remove {
    width: 36px; height: 36px;
    background-color: var(--error-red);
    color: var(--white);
    border-radius: 50%;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    min-width: 44px;
    min-height: 44px;
}

.cart-item-remove:hover {
    background-color: #C82333;
    transform: scale(1.1);
}

/* Cart Summary */
.cart-summary {
    background-color: var(--bg-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.total-amount {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-red);
}

.delivery-info {
    background-color: var(--bg-light);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-gray);
}

.delivery-info p { margin-bottom: 4px; }

.cart-summary .btn {
    width: 100%;
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   NOTIFICATIONS
   ============================================ */

.cart-notification {
    position: fixed;
    top: 80px; right: 20px;
    background-color: var(--success-green);
    color: var(--white);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transform: translateX(400px);
    transition: transform 0.3s ease;
    font-weight: 600;
    font-size: 0.9rem;
    max-width: 350px;
}

.cart-notification.show { transform: translateX(0); }
.cart-notification.remove { background-color: var(--warning-orange); }
.cart-notification.error { background-color: var(--error-red); }

/* ============================================
   SETTINGS PAGE
   ============================================ */

.page-subtitle {
    color: var(--text-gray);
    margin-bottom: var(--spacing-lg);
}

.settings-page {
    max-width: 600px;
}

.settings-section {
    background-color: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.settings-section h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-blue);
}

.settings-description {
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
}

.settings-status {
    font-size: 0.8rem;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
    display: inline-block;
}

.status-ok {
    background-color: #D4EDDA;
    color: #155724;
}

.status-warn {
    background-color: #FFF3CD;
    color: #856404;
}

.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--bg-light);
    margin-bottom: var(--spacing-sm);
}

.setting-row label { font-weight: 500; }

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

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

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--border-gray);
    transition: var(--transition);
    border-radius: 28px;
}

.toggle-slider:before {
    content: "";
    position: absolute;
    height: 22px; width: 22px;
    left: 3px; bottom: 3px;
    background-color: var(--white);
    transition: var(--transition);
    border-radius: 50%;
}

.toggle-switch input:checked + .toggle-slider {
    background-color: var(--success-green);
}

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

.settings-back {
    margin-top: var(--spacing-lg);
}

/* ============================================
   FOOTER
   ============================================ */

footer {
    background-color: var(--primary-blue);
    color: var(--white);
    text-align: center;
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-xl);
}

.footer-note {
    font-size: 0.8rem;
    opacity: 0.8;
    margin-top: var(--spacing-xs);
}

/* ============================================
   RESPONSIVE - Mobile First
   ============================================ */

/* Small phones */
@media (max-width: 480px) {
    .hero h2 { font-size: 1.4rem; }
    .modal-body { grid-template-columns: 1fr; }
    .modal-product-image { min-height: 200px; }
    .category-btn { padding: 6px 12px; font-size: 0.8rem; }
}

/* Cart mobile */
@media (max-width: 768px) {
    .cart-item {
        grid-template-columns: 80px 1fr;
        gap: var(--spacing-sm);
    }
    .cart-item-image { width: 80px; height: 80px; }
    .cart-item-quantity { grid-column: 1 / -1; justify-content: center; }
    .cart-item-total { grid-column: 1 / -1; text-align: center; }
    .cart-item-remove { position: absolute; top: 10px; right: 10px; }
    
    .modal-body { grid-template-columns: 1fr; }
    .modal-product-image { min-height: 250px; }
}

/* Tablets */
@media (min-width: 768px) {
    .logo { font-size: 1.8rem; }
    .hero h2 { font-size: 2.2rem; }
    .products-grid { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
}

/* Desktop */
@media (min-width: 1024px) {
    .products-grid { grid-template-columns: repeat(3, 1fr); }
}