:root {
    --primary: #6c63ff;
    --primary-dark: #5a52d5;
    --bg: #ffffff;
    --bg-secondary: #f4f4f9;
    --text: #333333;
    --text-light: #666666;
    --card-bg: #ffffff;
    --card-shadow: 0 4px 15px rgba(0,0,0,0.1);
    --border: #e0e0e0;
    --success: #28a745;
    --error: #dc3545;
    --radius: 12px;
    --transition: 0.3s ease;
}

[data-theme="dark"] {
    --primary: #8b83ff;
    --primary-dark: #7a72ee;
    --bg: #1a1a2e;
    --bg-secondary: #16213e;
    --text: #e0e0e0;
    --text-light: #b0b0b0;
    --card-bg: #0f3460;
    --card-shadow: 0 4px 15px rgba(0,0,0,0.5);
    --border: #2a2a4a;
}

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

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

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

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

/* Header */
header {
    background: var(--card-bg);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 15px 0;
}

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

.logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

nav ul li a {
    font-size: 1rem;
    padding: 8px 12px;
    border-radius: 6px;
    transition: background var(--transition);
}

nav ul li a:hover {
    background: var(--bg-secondary);
}

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

.btn-icon {
    background: none;
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    transition: all var(--transition);
}

.btn-icon:hover {
    background: var(--bg-secondary);
    color: var(--primary);
}

.hamburger {
    display: none;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--primary), #ff6b6b);
    color: white;
    text-align: center;
    padding: 80px 20px;
    border-radius: 0 0 30px 30px;
    margin-bottom: 40px;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.hero p {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 30px;
    opacity: 0.9;
}

.search-bar {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.search-bar input {
    padding: 12px 20px;
    border: none;
    border-radius: 25px;
    width: 300px;
    max-width: 100%;
    font-size: 1rem;
    outline: none;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.search-bar button {
    padding: 12px 30px;
    border: none;
    border-radius: 25px;
    background: #333;
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: background var(--transition);
}

.search-bar button:hover {
    background: #555;
}

/* Filters */
.filters {
    margin-bottom: 30px;
}

.filters .container {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-group label {
    font-weight: 600;
    font-size: 0.9rem;
}

.filter-group select {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--card-bg);
    color: var(--text);
    font-size: 0.9rem;
    outline: none;
}

.btn-secondary {
    padding: 8px 20px;
    border: 1px solid var(--primary);
    border-radius: 6px;
    background: transparent;
    color: var(--primary);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-secondary:hover {
    background: var(--primary);
    color: white;
}

/* Portfolio Grid */
.portfolio-grid {
    padding: 40px 0;
}

#gridContainer {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

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

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.card-image {
    position: relative;
    overflow: hidden;
    height: 200px;
}

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

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

.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.4);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    opacity: 0;
    transition: opacity var(--transition);
}

.card:hover .card-overlay {
    opacity: 1;
}

.card-overlay button {
    background: white;
    border: none;
    padding: 10px 15px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all var(--transition);
}

.card-overlay button:hover {
    background: var(--primary);
    color: white;
}

.card-body {
    padding: 20px;
}

.card-body h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: var(--text);
}

.card-body p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.rating {
    color: #ffc107;
    font-weight: 600;
}

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

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag {
    background: var(--bg-secondary);
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    color: var(--text-light);
}

/* Stats */
.stats {
    padding: 60px 0;
    background: var(--bg-secondary);
    text-align: center;
}

.stats h2 {
    margin-bottom: 30px;
    font-size: 2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-item {
    background: var(--card-bg);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--card-shadow);
}

.stat-item i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 10px;
}

.stat-item span {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text);
}

.heatmap {
    margin-top: 40px;
}

.heatmap h3 {
    margin-bottom: 20px;
}

#heatmapContainer {
    width: 100%;
    height: 200px;
    background: var(--card-bg);
    border-radius: var(--radius);
    display: flex;
    align-items: flex-end;
    padding: 20px;
    gap: 5px;
}

.heatmap-bar {
    flex: 1;
    background: var(--primary);
    border-radius: 4px 4px 0 0;
    transition: height 0.5s ease;
    min-height: 10px;
}

/* Footer */
footer {
    background: var(--card-bg);
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid var(--border);
}

footer p {
    margin-bottom: 10px;
    color: var(--text-light);
}

.social-share {
    display: flex;
    justify-content: center;
    gap: 15px;
}

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

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

/* Login */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: var(--bg-secondary);
}

.login-form {
    background: var(--card-bg);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--card-shadow);
    width: 100%;
    max-width: 400px;
}

.login-form h2 {
    margin-bottom: 20px;
    text-align: center;
}

.login-form input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
    background: var(--bg);
    color: var(--text);
}

.login-form button {
    width: 100%;
    padding: 12px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: background var(--transition);
}

.login-form button:hover {
    background: var(--primary-dark);
}

/* Admin */
.admin-main {
    padding: 40px 0;
}

.admin-main h1 {
    margin-bottom: 30px;
    font-size: 2rem;
}

.admin-section {
    background: var(--card-bg);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--card-shadow);
    margin-bottom: 30px;
}

.admin-section h2 {
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.admin-section form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.admin-section input,
.admin-section textarea,
.admin-section select {
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
    background: var(--bg);
    color: var(--text);
}

.admin-section textarea {
    resize: vertical;
}

.btn-primary {
    padding: 10px 20px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background var(--transition);
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-danger {
    padding: 6px 12px;
    background: var(--error);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background var(--transition);
}

.btn-danger:hover {
    background: #c82333;
}

.success {
    color: var(--success);
    margin-top: 10px;
}

.error {
    color: var(--error);
    margin-top: 10px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background: var(--bg-secondary);
    font-weight: 600;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 1.8rem;
    }

    .search-bar input {
        width: 200px;
    }

    nav ul {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background: var(--card-bg);
        box-shadow: 0 4px 10px rgba(0,0,0,0.1);
        padding: 20px;
    }

    nav ul.active {
        display: flex;
    }

    .hamburger {
        display: block;
    }

    .filters .container {
        flex-direction: column;
        align-items: stretch;
    }

    #gridContainer {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 40px 20px;
    }

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

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

/* Inner pages */
.page-hero {
    background: linear-gradient(135deg, var(--primary), #ff6b6b);
    color: white;
    text-align: center;
    padding: 60px 20px;
    border-radius: 0 0 30px 30px;
    margin-bottom: 40px;
}

.page-hero h1 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.page-content {
    padding: 40px 0;
}

.page-content p {
    margin-bottom: 15px;
    font-size: 1.1rem;
    line-height: 1.8;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
    background: var(--bg);
    color: var(--text);
}

.contact-form textarea {
    height: 150px;
    resize: vertical;
}

.contact-form button {
    padding: 12px 40px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: background var(--transition);
}

.contact-form button:hover {
    background: var(--primary-dark);
}