/* Frontend Styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #3498db;
    --text-color: #333;
    --light-gray: #f8f9fa;
    --medium-gray: #e9ecef;
    --dark-gray: #6c757d;
    --success-color: #2ecc71;
    --error-color: #e74c3c;
    --border-radius: 8px;
    --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    --transition-speed: 0.3s;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-gray);
    margin: 0;
    padding: 0;
}

/* Header Styles */
header {
    background-color: var(--primary-color);
    color: white;
    padding: 1.25rem 2rem;
    box-shadow: var(--box-shadow);
}

header h1 {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

nav ul {
    display: flex;
    list-style: none;
    padding: 0;
    margin: 1rem 0 0;
}

nav li {
    margin-right: 1.5rem;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0;
    transition: all var(--transition-speed);
    position: relative;
}

nav a:hover {
    color: var(--accent-color);
}

nav a.active {
    color: white;
}

nav a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--accent-color);
}

nav a:not(.active)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: width var(--transition-speed);
}

nav a:not(.active):hover::after {
    width: 100%;
}

/* Page Layout */
.page-layout {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    gap: 2rem;
}

.main-content {
    flex: 1;
}

.sidebar {
    width: 300px;
    position: sticky;
    top: 2rem;
    align-self: flex-start;
    height: calc(100vh - 4rem);
    overflow-y: auto;
}

/* Search Section */
.search-section {
    background-color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
}

.search-section h2 {
    margin-top: 0;
    color: var(--secondary-color);
}

.search-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.search-controls {
    display: flex;
    gap: 0.5rem;
}

.store-dropdown, .search-input, .search-button, .sort-dropdown {
    padding: 0.75rem;
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.store-dropdown, .sort-dropdown {
    background-color: white;
    min-width: 150px;
}

.search-input {
    flex-grow: 1;
}

.search-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    transition: all var(--transition-speed);
    min-width: 100px;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.search-button:hover {
    background-color: var(--secondary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.filter-sort-controls {
    display: flex;
    justify-content: flex-end;
}

/* Results Section */
.results-section {
    margin-bottom: 2rem;
}

.loading-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
    margin-bottom: 1rem;
}

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

.no-results {
    text-align: center;
    padding: 2rem;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.hidden {
    display: none;
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.product-card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    transition: all var(--transition-speed);
    display: flex;
    flex-direction: column;
    border: 1px solid var(--medium-gray);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.08);
    border-color: var(--accent-color);
}

.product-image {
    width: 100%;
    height: 200px;
    object-fit: contain;
    background-color: #f9f9f9;
    padding: 1rem;
}

.product-info {
    padding: 1rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.product-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0 0 0.5rem;
    color: var(--secondary-color);
}

.product-description {
    font-size: 0.9rem;
    color: var(--dark-gray);
    margin: 0 0 1rem;
}

.product-price {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0 0 0.5rem;
}

.product-price-per-kg {
    font-size: 0.9rem;
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

.add-to-cart {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: auto;
}

.quantity-input {
    width: 60px;
    padding: 0.5rem;
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
    text-align: center;
}

.add-to-cart-button {
    flex-grow: 1;
    padding: 0.5rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-speed);
    font-weight: 500;
    letter-spacing: 0.5px;
}

.add-to-cart-button:hover {
    background-color: var(--secondary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Cart Section */
.cart-section {
    background-color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.cart-section h2 {
    margin-top: 0;
    color: var(--secondary-color);
}

.cart-items {
    margin-bottom: 1.5rem;
    flex: 1;
    overflow-y: auto;
}

.empty-cart-message {
    text-align: center;
    color: var(--dark-gray);
    padding: 1rem;
}

.cart-item {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    border-bottom: 1px solid var(--medium-gray);
}

.cart-item-image {
    width: 60px;
    height: 60px;
    object-fit: contain;
    margin-right: 1rem;
}

.cart-item-details {
    flex-grow: 1;
}

.cart-item-name {
    font-weight: 600;
    margin: 0 0 0.25rem;
}

.cart-item-price {
    font-size: 0.9rem;
    color: var(--primary-color);
}

.cart-item-weight {
    font-size: 0.9rem;
    color: var(--dark-gray);
    margin-bottom: 0.25rem;
}

.cart-item-quantity {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.quantity-button {
    width: 24px;
    height: 24px;
    background-color: var(--medium-gray);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.remove-item {
    color: var(--error-color);
    background: none;
    border: none;
    cursor: pointer;
    margin-left: 1rem;
    font-size: 1.2rem;
}

.cart-summary {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
}

.cart-total {
    flex-grow: 1;
    font-size: 1.2rem;
    font-weight: 600;
}

.save-cart-button {
    padding: 0.75rem 1.5rem;
    background-color: var(--success-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-speed);
    font-weight: 500;
    letter-spacing: 0.5px;
}

.save-cart-button:hover {
    background-color: #27ae60;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.cart-name-input {
    padding: 0.75rem;
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
    flex-grow: 1;
    max-width: 200px;
}

/* Saved Carts Page */
.saved-carts-section {
    background-color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
}

.saved-carts-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.saved-carts-section h2 {
    margin-top: 0;
    margin-bottom: 0;
    color: var(--secondary-color);
}

.refresh-prices-button {
    padding: 0.5rem 1rem;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-speed);
    font-weight: 500;
    letter-spacing: 0.5px;
}

.refresh-prices-button:hover {
    background-color: #2980b9;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.saved-carts-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.no-saved-carts-message {
    text-align: center;
    color: var(--dark-gray);
    padding: 1rem;
}

.saved-cart-item {
    background-color: var(--light-gray);
    border-radius: var(--border-radius);
    padding: 1rem;
    cursor: pointer;
    transition: background-color var(--transition-speed);
}

.saved-cart-item:hover {
    background-color: var(--medium-gray);
}

.saved-cart-item.selected {
    background-color: var(--primary-color);
    color: white;
}

.saved-cart-name {
    margin: 0 0 0.5rem;
    font-size: 1.2rem;
}

.saved-cart-info {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.9rem;
}

.cart-details-section {
    background-color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.cart-details-section h2 {
    margin-top: 0;
    color: var(--secondary-color);
}

.cart-details-container {
    flex: 1;
    overflow-y: auto;
}

.select-cart-message, .loading-message {
    text-align: center;
    color: var(--dark-gray);
    padding: 1rem;
}

.loading-message {
    background-color: var(--light-gray);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-left: 2.5rem;
}

.loading-message::before {
    content: '';
    position: absolute;
    left: 1rem;
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

.cart-details-header {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--medium-gray);
}

.cart-details-header h3 {
    margin: 0 0 0.5rem;
    color: var(--secondary-color);
}

.cart-details-header p {
    margin: 0;
    color: var(--dark-gray);
}

.cart-details-items {
    margin-bottom: 1rem;
    max-height: 300px;
    overflow-y: auto;
}

.cart-detail-item {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    border-bottom: 1px solid var(--medium-gray);
}

.cart-detail-item-image {
    width: 60px;
    height: 60px;
    object-fit: contain;
    margin-right: 1rem;
}

.cart-detail-item-details {
    flex-grow: 1;
}

.cart-detail-item-name {
    font-weight: 600;
    margin: 0 0 0.25rem;
}

.cart-detail-item-price {
    font-size: 0.9rem;
    color: var(--primary-color);
}

.cart-detail-item-weight {
    font-size: 0.9rem;
    color: var(--dark-gray);
    margin-bottom: 0.25rem;
}

.cart-details-total {
    display: flex;
    justify-content: space-between;
    font-size: 1.2rem;
    font-weight: 600;
    padding-top: 1rem;
    border-top: 1px solid var(--medium-gray);
}

.cart-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.load-cart-button, .delete-cart-button, .create-in-other-store-button {
    flex: 1;
    padding: 0.75rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-speed);
    font-weight: 500;
    letter-spacing: 0.5px;
}

.load-cart-button {
    background-color: var(--success-color);
    color: white;
}

.load-cart-button:hover {
    background-color: #27ae60;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.delete-cart-button {
    background-color: var(--error-color);
    color: white;
}

.delete-cart-button:hover {
    background-color: #c0392b;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.create-in-other-store-button {
    background-color: var(--accent-color);
    color: white;
}

.create-in-other-store-button:hover {
    background-color: #2980b9;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 1.5rem;
    margin-top: 2rem;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media (min-width: 768px) {
    header {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    nav ul {
        margin: 0;
    }

    .search-container {
        flex-direction: row;
        justify-content: space-between;
    }

    .search-controls {
        flex-grow: 1;
        max-width: 70%;
    }
}

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

    .sidebar {
        width: 100%;
        height: auto;
        position: static;
    }

    .cart-section {
        height: auto;
    }

    .cart-items {
        max-height: 300px;
    }

    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }

    .cart-summary {
        flex-direction: column;
        align-items: stretch;
    }

    .cart-name-input {
        max-width: none;
    }
}