/* ==========================================
   POST CARDS AND THINGS - INVENTORY DISPLAY
   Responsive Grid Layout
   ========================================== */

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

:root {
    --primary-color: #e74c3c;
    --secondary-color: #3498db;
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
    --border-light: #ecf0f1;
    --bg-light: #f9f9f9;
    --bg-white: #ffffff;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --border-radius: 8px;
    --box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-dark);
    background-color: var(--bg-light);
    line-height: 1.6;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-sm);
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
}

.header .subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
}

/* Main Content Layout */
.main-content {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

/* Sidebar */
.sidebar {
    background: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    height: fit-content;
    position: sticky;
    top: var(--spacing-md);
}

.sidebar h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: var(--spacing-sm);
}

.filter-group {
    margin-bottom: var(--spacing-md);
}

.filter-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-dark);
    font-size: 0.95rem;
}

.search-input,
.select-input {
    width: 100%;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-xs);
    transition: var(--transition);
}

.search-input:focus,
.select-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.results-info {
    font-size: 0.9rem;
    color: var(--text-light);
    padding: var(--spacing-sm);
    background-color: var(--bg-light);
    border-radius: var(--border-radius);
    margin-top: var(--spacing-sm);
}

/* Buttons */
.btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-block;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    width: 100%;
    margin-bottom: var(--spacing-xs);
}

.btn-primary:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

.btn-secondary {
    background-color: var(--border-light);
    color: var(--text-dark);
    width: 100%;
}

.btn-secondary:hover {
    background-color: #d5dbdb;
}

.btn-pagination {
    background-color: var(--secondary-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
}

.btn-pagination:hover:not(:disabled) {
    background-color: #2980b9;
    transform: translateY(-2px);
}

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

/* Listings Section */
.listings-section {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

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

/* Listing Card */
.listing-card {
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    box-shadow: var(--box-shadow);
}

.listing-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.listing-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background-color: var(--bg-light);
    display: block;
}

.listing-image.placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 0.9rem;
}

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

.listing-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-dark);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 2.4em;
}

.listing-description {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 4.5em;
    flex-grow: 1;
}

.listing-price {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.listing-quantity {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}

.listing-quantity.in-stock {
    color: #27ae60;
    font-weight: 600;
}

.listing-quantity.low-stock {
    color: #f39c12;
    font-weight: 600;
}

.listing-quantity.out-of-stock {
    color: var(--text-light);
}

.listing-link {
    background-color: var(--secondary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: none;
    border-radius: var(--border-radius);
    text-decoration: none;
    text-align: center;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-block;
    width: 100%;
}

.listing-link:hover {
    background-color: #2980b9;
    text-decoration: none;
}

/* Loading State */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    color: var(--text-light);
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-light);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: var(--spacing-md);
}

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

/* Error Message */
.error-message {
    background-color: #ffe6e6;
    border: 1px solid #ff9999;
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    color: #c0392b;
    margin-bottom: var(--spacing-lg);
}

/* No Results */
.no-results {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-light);
    font-size: 1.1rem;
}

/* Pagination */
.pagination-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.page-info {
    font-weight: 600;
    color: var(--text-dark);
    white-space: nowrap;
}

/* Footer */
.footer {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-light);
    border-top: 1px solid var(--border-light);
    margin-top: var(--spacing-xl);
}

/* ==========================================
   RESPONSIVE BREAKPOINTS
   ========================================== */

/* Tablet: 768px and up */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 200px 1fr;
        gap: var(--spacing-md);
    }

    .header h1 {
        font-size: 2rem;
    }

    .grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    }
}

/* Mobile: 768px and down */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-xs);
    }

    .main-content {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
        margin-bottom: var(--spacing-lg);
    }

    .header {
        padding: var(--spacing-lg) var(--spacing-md);
        margin-bottom: var(--spacing-md);
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .header .subtitle {
        font-size: 1rem;
    }

    .grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: var(--spacing-sm);
    }

    .listings-section {
        padding: var(--spacing-md);
    }

    .listing-card {
        border-radius: 4px;
    }

    .listing-image {
        height: 150px;
    }

    .listing-content {
        padding: var(--spacing-sm);
    }

    .listing-title {
        font-size: 1rem;
    }

    .listing-description {
        font-size: 0.85rem;
        -webkit-line-clamp: 2;
        min-height: 3em;
    }

    .listing-price {
        font-size: 1.2rem;
    }

    .pagination-container {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }

    .btn-pagination {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: 0.9rem;
    }
}

/* Small Mobile: 480px and down */
@media (max-width: 480px) {
    .container {
        padding: 0;
    }

    .header {
        padding: var(--spacing-lg) var(--spacing-sm);
        border-radius: 0;
    }

    .main-content {
        gap: var(--spacing-sm);
    }

    .sidebar {
        margin-bottom: var(--spacing-md);
        padding: var(--spacing-md) var(--spacing-sm);
    }

    .grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-xs);
    }

    .listings-section {
        padding: var(--spacing-sm);
        border-radius: 0;
    }

    .listing-card {
        box-shadow: none;
        border-color: var(--border-light);
    }

    .listing-image {
        height: 120px;
    }

    .listing-content {
        padding: var(--spacing-xs);
    }

    .listing-title {
        font-size: 0.95rem;
        -webkit-line-clamp: 2;
        min-height: 2.2em;
    }

    .listing-description {
        display: none;
    }

    .listing-price {
        font-size: 1.1rem;
    }

    .listing-link {
        padding: var(--spacing-xs) var(--spacing-xs);
        font-size: 0.85rem;
    }

    .btn-pagination {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.85rem;
    }

    .pagination-container {
        gap: var(--spacing-sm);
    }

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

    .footer {
        padding: var(--spacing-md) var(--spacing-sm);
        font-size: 0.9rem;
    }
}