* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: #f8f9fa;
    color: #333;
    line-height: 1.6;
    transition: background 0.3s, color 0.3s;
}

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

/* Navbar */
.navbar {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: background 0.3s;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary, #e83e8c);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    color: #333;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary, #e83e8c);
}

.nav-actions {
    display: flex;
    gap: 10px;
}

.btn-icon {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: #333;
    transition: color 0.3s;
}

.btn-icon:hover {
    color: var(--primary, #e83e8c);
}

.hamburger {
    display: none;
}

.search-bar {
    display: none;
    padding: 10px 20px;
    background: #f1f1f1;
    text-align: center;
}

.search-bar input {
    padding: 10px;
    width: 60%;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

.search-bar button {
    padding: 10px 20px;
    background: var(--primary, #e83e8c);
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--primary, #e83e8c), var(--secondary, #ff6b9d));
    color: #fff;
    text-align: center;
    padding: 80px 20px;
    border-radius: 0 0 50px 50px;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.btn {
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
    display: inline-block;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.btn-primary {
    background: #fff;
    color: var(--primary, #e83e8c);
}

.btn-secondary {
    background: var(--secondary, #ff6b9d);
    color: #fff;
    border: none;
}

/* Filters */
.filters {
    padding: 30px 0;
}

.filter-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-group select, .filter-group input {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

/* Products Grid */
.products-grid {
    padding: 40px 0;
}

.products-grid h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 2rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.product-image {
    position: relative;
    overflow: hidden;
    height: 300px;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

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

.product-overlay {
    position: absolute;
    bottom: -100%;
    left: 0;
    right: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 15px;
    transition: bottom 0.3s;
}

.product-card:hover .product-overlay {
    bottom: 0;
}

.product-overlay .btn {
    padding: 8px 15px;
    font-size: 0.9rem;
}

.product-info {
    padding: 20px;
}

.product-info h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.price {
    font-size: 1.3rem;
    color: var(--primary, #e83e8c);
    font-weight: 700;
    margin-bottom: 10px;
}

.rating {
    margin-bottom: 10px;
}

.rating .fa-star {
    color: #ddd;
}

.rating .fa-star.active {
    color: #ffc107;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.tag {
    background: #f0f0f0;
    padding: 3px 10px;
    border-radius: 15px;
    font-size: 0.8rem;
    color: #666;
}

/* Stats Heatmap */
.stats-heatmap {
    padding: 40px 0;
    background: #fff;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.stat-card {
    background: var(--accent, #ffb6c1);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    font-size: 1.1rem;
}

/* Footer */
.footer {
    background: #333;
    color: #fff;
    padding: 40px 0;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 20px;
}

.footer-links a {
    color: #fff;
    text-decoration: none;
}

.footer-links a:hover {
    text-decoration: underline;
}

.share-buttons {
    margin-bottom: 20px;
}

.share-btn {
    color: #fff;
    margin: 0 5px;
    font-size: 1.5rem;
    transition: color 0.3s;
}

.share-btn:hover {
    color: var(--primary, #e83e8c);
}

/* Admin */
.login-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 40px;
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    text-align: center;
}

.login-container input {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 5px;
}

.admin-dashboard {
    padding: 40px 0;
}

.admin-section {
    background: #fff;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    margin-bottom: 30px;
}

.admin-section h2 {
    margin-bottom: 20px;
}

.admin-section label {
    display: block;
    margin-bottom: 15px;
}

.admin-section input, .admin-section textarea, .admin-section select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    margin-top: 5px;
}

.admin-section table {
    width: 100%;
    border-collapse: collapse;
}

.admin-section th, .admin-section td {
    padding: 10px;
    border-bottom: 1px solid #ddd;
    text-align: left;
}

.success { color: #28a745; }
.error { color: #dc3545; }

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: #fff;
        box-shadow: 0 5px 20px rgba(0,0,0,0.1);
        padding: 20px;
    }
    .nav-links.active {
        display: flex;
    }
    .hamburger {
        display: block;
    }
    .hero h1 {
        font-size: 1.8rem;
    }
    .grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
    .filter-group {
        flex-direction: column;
        align-items: center;
    }
}

/* Dark mode */
body.dark-mode .navbar {
    background: #16213e;
}

body.dark-mode .product-card {
    background: #0f3460;
    color: #eee;
}

body.dark-mode .footer {
    background: #16213e;
}

body.dark-mode .stats-heatmap {
    background: #0f3460;
}