/* Modern CSS Design System for HCMUTE Web Scraping Practice Hub */
:root {
    --primary-color: #1e3a8a;
    --primary-hover: #1d4ed8;
    --accent-color: #2563eb;
    --bg-light: #f8fafc;
    --card-bg: #ffffff;
    --text-dark: #0f172a;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --success-color: #16a34a;
    --warning-color: #d97706;
    --danger-color: #dc2626;
    --radius-sm: 6px;
    --radius-md: 10px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

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

/* Top Bar */
.top-bar {
    background-color: #0f172a;
    color: #94a3b8;
    font-size: 13px;
    padding: 8px 0;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    color: #4ade80;
    font-weight: 500;
}

.status-badge .dot {
    width: 8px;
    height: 8px;
    background-color: #4ade80;
    border-radius: 50%;
    margin-right: 6px;
    display: inline-block;
}

/* Header */
.main-header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
    box-shadow: var(--shadow-sm);
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo {
    background-color: var(--primary-color);
    color: white;
    font-weight: 700;
    font-size: 18px;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    letter-spacing: 1px;
}

.brand-text h1 {
    font-size: 18px;
    color: var(--primary-color);
    font-weight: 700;
}

.brand-text p {
    font-size: 13px;
    color: var(--text-muted);
}

.nav-links {
    display: flex;
    gap: 16px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--primary-color);
    background-color: #eff6ff;
}

.btn-api {
    background-color: var(--accent-color) !important;
    color: white !important;
}

.btn-api:hover {
    background-color: var(--primary-hover) !important;
}

/* Info Banner */
.info-card {
    background-color: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: var(--radius-md);
    padding: 20px;
    margin: 24px 0;
}

.info-card h2 {
    font-size: 16px;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.info-card p {
    font-size: 14px;
    color: #1e40af;
    margin-bottom: 12px;
}

.code-hint {
    background-color: #ffffff;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--accent-color);
    font-size: 13px;
}

.code-hint code {
    background-color: #f1f5f9;
    padding: 2px 6px;
    border-radius: 4px;
    color: #0f172a;
    font-family: monospace;

}

/* Catalog Header */
.catalog-header {
    margin: 24px 0 16px 0;
}

.catalog-header h3 {
    font-size: 18px;
    color: var(--text-dark);
}

.sort-control select {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-dark);
}

/* Product Grid */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.product-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.badge-discount {
    position: absolute;
    top: 10px;
    left: 10px;
    background-color: var(--danger-color);
    color: white;
    font-weight: 700;
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 4px;
    z-index: 2;
}

.product-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    background-color: #f1f5f9;
}

.product-body {
    padding: 16px;
}

.category-tag {
    font-size: 12px;
    color: var(--accent-color);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.product-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
    margin: 6px 0 8px 0;
    line-height: 1.3;
    height: 40px;
    overflow: hidden;
}

.seller-info {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.rating-box {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    margin-bottom: 10px;
}

.stars {
    color: #f59e0b;
}

.rating-score {
    font-weight: 700;
    color: var(--text-dark);
}

.review-count {
    color: var(--text-muted);
    font-size: 12px;
}

.price-box {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 10px;
}

.current-price {
    font-size: 16px;
    font-weight: 700;
    color: var(--danger-color);
}

.original-price {
    font-size: 13px;
    color: var(--text-muted);
    text-decoration: line-through;
}

.stock-info {
    font-size: 12px;
    border-top: 1px dashed var(--border-color);
    padding-top: 8px;
}

.stock-status.in-stock {
    color: var(--success-color);
    font-weight: 600;
}

.stock-status.low-stock {
    color: var(--warning-color);
    font-weight: 600;
}

.stock-status.out-of-stock {
    color: var(--danger-color);
    font-weight: 600;
}

/* Table Style for Data Table Page */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    margin: 20px 0;
}

.data-table th {
    background-color: var(--primary-color);
    color: white;
    text-align: left;
    padding: 12px 16px;
    font-size: 14px;
}

.data-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}

.data-table tr:hover {
    background-color: #f8fafc;
}

/* Pagination */
.pagination {
    gap: 8px;
    margin: 30px 0 50px 0;
}

.page-link {
    display: inline-block;
    padding: 8px 14px;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    color: var(--text-dark);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
}

.page-link.active, .page-link:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Footer */
.main-footer {
    background-color: #0f172a;
    color: #94a3b8;
    padding: 30px 0;
    font-size: 13px;
    border-top: 1px solid #1e293b;
}

.main-footer .sub-text {
    color: #64748b;
    margin-top: 6px;
}