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

:root {
    --primary: #e91e63;
    --secondary: #ff6f00;
    --bg: #fafafa;
    --card-bg: #ffffff;
    --text: #212121;
    --text-light: #757575;
    --border: #e0e0e0;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --radius: 16px;
    --transition: 0.3s ease;
}

[data-theme="dark"] {
    --bg: #121212;
    --card-bg: #1e1e1e;
    --text: #e0e0e0;
    --text-light: #aaaaaa;
    --border: #333;
    --shadow: 0 4px 20px rgba(0,0,0,0.4);
}

[data-template="tech"] {
    --primary: #2196f3;
    --secondary: #00bcd4;
}

[data-template="food"] {
    --primary: #ff5722;
    --secondary: #4caf50;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background var(--transition), color var(--transition);
}

/* Header */
.header {
    background: var(--card-bg);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.logo h1 {
    font-size: 1.5rem;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: background var(--transition), color var(--transition);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn-icon {
    background: none;
    border: 1px solid var(--border);
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    color: var(--text);
    transition: all var(--transition);
}

.btn-icon:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.btn {
    padding: 0.6rem 1.5rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition);
}

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

.btn-primary:hover {
    background: var(--secondary);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--border);
    color: var(--text);
}

.btn-danger {
    background: #f44336;
    color: #fff;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--text);
    margin: 5px 0;
    border-radius: 3px;
    transition: all var(--transition);
}

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    text-align: center;
    padding: 4rem 2rem;
}

.hero-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.search-bar {
    display: flex;
    max-width: 500px;
    margin: 0 auto 1.5rem;
    background: #fff;
    border-radius: 50px;
    overflow: hidden;
}

.search-bar input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: none;
    font-size: 1rem;
    outline: none;
}

.search-bar button {
    background: var(--primary);
    border: none;
    padding: 1rem 1.5rem;
    color: #fff;
    cursor: pointer;
    transition: background var(--transition);
}

.search-bar button:hover {
    background: var(--secondary);
}

.filter-bar {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-bar select {
    padding: 0.5rem 1rem;
    border: 1px solid #fff;
    border-radius: 8px;
    background: rgba(255,255,255,0.2);
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
}

.filter-bar select option {
    color: var(--text);
}

/* Stats */
.stats-heatmap {
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.stats-heatmap h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.stat-card span {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-card p {
    color: var(--text-light);
    margin-top: 0.5rem;
}

.heatmap-container {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 1rem;
    box-shadow: var(--shadow);
}

#heatmapCanvas {
    width: 100%;
    height: auto;
    border-radius: 8px;
}

/* Items Grid */
.featured-items {
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.featured-items h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--primary);
}

.items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.item-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

.item-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

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

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition);
}

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

.card-category {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: var(--primary);
    color: #fff;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

.card-body h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.card-body p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.price {
    font-weight: 700;
    color: var(--primary);
    font-size: 1.1rem;
}

.rating {
    color: #ffc107;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
    margin-bottom: 1rem;
}

.tag {
    background: var(--border);
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.8rem;
    color: var(--text-light);
}

.card-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-like, .btn-share {
    background: none;
    border: 1px solid var(--border);
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    color: var(--text);
    transition: all var(--transition);
}

.btn-like:hover, .btn-share:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* Footer */
.footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border);
    padding: 3rem 2rem 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--primary);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    text-decoration: none;
    color: var(--text);
    transition: color var(--transition);
}

.footer-section a:hover {
    color: var(--primary);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    font-size: 1.5rem;
    color: var(--text-light);
    transition: color var(--transition);
}

.social-links a:hover {
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    color: var(--text-light);
}

/* Admin */
.admin-body {
    background: var(--bg);
}

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 2rem;
}

.login-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    max-width: 400px;
    width: 100%;
}

.login-card h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    font-size: 1rem;
}

.form-group textarea {
    resize: vertical;
}

.error {
    color: #f44336;
    text-align: center;
    margin-bottom: 1rem;
}

.message {
    color: #4caf50;
    margin-bottom: 1rem;
}

.back-link {
    text-align: center;
    margin-top: 1rem;
}

.back-link a {
    color: var(--primary);
    text-decoration: none;
}

.admin-panel {
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.admin-header h1 {
    color: var(--primary);
}

.admin-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.admin-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 0.8rem 1.5rem;
    border: 1px solid var(--border);
    background: var(--card-bg);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition);
}

.tab-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.admin-table th,
.admin-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.admin-table th {
    background: var(--primary);
    color: #fff;
}

.btn-sm {
    padding: 0.3rem 0.8rem;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        flex-wrap: wrap;
    }

    .hamburger {
        display: block;
    }

    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0;
        padding: 1rem 0;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        padding: 1rem;
        border-bottom: 1px solid var(--border);
    }

    .nav-actions {
        margin-left: auto;
    }

    .hero-content h2 {
        font-size: 1.8rem;
    }

    .filter-bar {
        flex-direction: column;
        align-items: center;
    }

    .filter-bar select {
        width: 100%;
        max-width: 300px;
    }

    .items-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }

    .admin-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 2rem 1rem;
    }

    .hero-content h2 {
        font-size: 1.4rem;
    }

    .items-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
}