:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #fff;
    --bg-light: #f8f9fa;
    --border-color: #ddd;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 20px rgba(0,0,0,0.15);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

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

/* Header */
.site-header {
    background: var(--primary-color);
    color: white;
    padding: 1rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
}

.nav-links a:hover {
    opacity: 0.8;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.25rem;
    opacity: 0.9;
}

/* Page Header */
.page-header {
    background: var(--bg-light);
    padding: 2rem 0;
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.breadcrumb {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.breadcrumb a {
    color: var(--secondary-color);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* Sections */
section {
    padding: 3rem 0;
}

section h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

/* Categories Grid */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.category-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    text-decoration: none;
    color: var(--text-color);
    transition: all 0.3s;
    box-shadow: var(--shadow);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.category-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

/* Artworks Grid */
.artworks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.artwork-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.artwork-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.artwork-card a {
    text-decoration: none;
    color: var(--text-color);
}

.artwork-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
    background: var(--bg-light);
}

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

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

.artwork-info {
    padding: 1.5rem;
}

.artwork-info h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.artwork-category {
    color: var(--secondary-color);
    font-weight: 500;
    font-size: 0.9rem;
}

.artwork-date {
    color: var(--text-light);
    font-size: 0.9rem;
}

.artwork-medium {
    color: var(--text-light);
    font-size: 0.85rem;
    font-style: italic;
}

/* Category Section */
.category-section {
    margin-bottom: 3rem;
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.view-category {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 500;
}

.view-category:hover {
    text-decoration: underline;
}

/* Artwork Detail */
.artwork-detail {
    padding: 2rem 0;
}

.artwork-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.artwork-image-large {
    background: var(--bg-light);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.artwork-image-large img {
    width: 100%;
    height: auto;
    display: block;
}

.artwork-details h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.artwork-meta {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.meta-item {
    margin-bottom: 0.75rem;
}

.meta-label {
    font-weight: 600;
    color: var(--primary-color);
    margin-right: 0.5rem;
}

.artwork-description {
    margin-bottom: 2rem;
}

.artwork-description h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.artwork-tags {
    margin-bottom: 2rem;
}

.tag {
    display: inline-block;
    background: var(--bg-light);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-light);
}

.artwork-actions {
    display: flex;
    gap: 1rem;
}

/* Artwork Navigation */
.artwork-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

.nav-link {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: var(--text-color);
    padding: 1rem;
    border-radius: 8px;
    transition: background 0.3s;
    max-width: 45%;
}

.nav-link:hover {
    background: var(--bg-light);
}

.nav-link.next {
    text-align: right;
    margin-left: auto;
}

.nav-title {
    font-weight: 600;
    color: var(--primary-color);
    margin-top: 0.5rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--secondary-color);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.3s;
}

.btn:hover {
    background: #2980b9;
}

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

.btn-secondary:hover {
    background: #1a252f;
}

.btn-share {
    background: var(--accent-color);
}

.btn-share:hover {
    background: #c0392b;
}

.view-all {
    text-align: center;
    margin-top: 2rem;
}

/* Footer */
.site-footer {
    background: var(--primary-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
    margin-top: 4rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .categories-grid,
    .artworks-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 1rem;
    }

    .artwork-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .artwork-navigation {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-link {
        max-width: 100%;
    }

    .nav-link.next {
        margin-left: 0;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.5rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .categories-grid,
    .artworks-grid {
        grid-template-columns: 1fr;
    }

    .nav-links {
        flex-direction: column;
        gap: 0.5rem;
    }
}