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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --text-color: #1e293b;
    --text-light: #64748b;
    --bg-color: #ffffff;
    --bg-light: #f8fafc;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --error-color: #ef4444;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --border-radius: 8px;
    --transition: all 0.2s ease-in-out;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 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 */
.header {
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-color);
    text-decoration: none;
}

.logo {
    width: 32px;
    height: 32px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.nav-link {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 0;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    margin: 3px 0;
    transition: var(--transition);
}

/* Buttons */
.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* Hero Section */
.hero {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    min-height: 500px;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-image img {
    width: 100%;
    height: auto;
    max-width: 500px;
}

/* Sections */
.featured-section,
.categories-preview,
.books-section,
.categories-section,
.content-section,
.contact-section {
    padding: 4rem 0;
}

.featured-section {
    background: var(--bg-light);
}

.page-header {
    padding: 3rem 0;
    background: var(--bg-light);
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.25rem;
    color: var(--text-light);
}

/* Book Grid */
.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.book-card {
    background: var(--bg-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.book-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.book-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
}

.book-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.book-card h3 a {
    text-decoration: none;
    color: var(--text-color);
}

.book-card h3 a:hover {
    color: var(--primary-color);
}

.book-author {
    color: var(--text-light);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.book-category {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.book-description {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.5;
}

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

.category-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
}

.category-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.category-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.category-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

/* Filters */
.books-filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.search-box,
.filter-box {
    flex: 1;
    min-width: 250px;
}

.search-box input,
.filter-box select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.search-box input:focus,
.filter-box select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Book Detail */
.book-detail {
    max-width: 1000px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.book-header {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.book-image img {
    width: 100%;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.book-info h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.book-meta {
    margin-bottom: 2rem;
}

.book-meta p {
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

.book-meta strong {
    color: var(--text-color);
}

.book-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

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

.book-main h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.book-main p {
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.book-main ul {
    margin-bottom: 2rem;
    padding-left: 1.5rem;
}

.book-main li {
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

.book-sidebar {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: var(--border-radius);
    height: fit-content;
}

.disclaimer-notice {
    background: #fef3c7;
    border: 1px solid #f59e0b;
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 2rem;
}

.disclaimer-notice p {
    margin: 0;
    color: #92400e;
    font-weight: 500;
}

/* Categories List */
.categories-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.category-section {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
}

.category-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.category-section p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.category-books {
    display: grid;
    gap: 1rem;
}

.category-book-item {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.category-book-item:hover {
    background: #e2e8f0;
}

.category-book-item img {
    width: 60px;
    height: 80px;
    object-fit: cover;
    border-radius: 4px;
}

.category-book-info h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.category-book-info h4 a {
    text-decoration: none;
    color: var(--text-color);
}

.category-book-info h4 a:hover {
    color: var(--primary-color);
}

.category-book-info p {
    font-size: 0.875rem;
    color: var(--text-light);
    margin: 0;
}

/* Content Layout */
.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.content-main h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
    margin-top: 2rem;
    color: var(--text-color);
}

.content-main h2:first-child {
    margin-top: 0;
}

.content-main p {
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.content-main ul {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.content-main li {
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

.content-sidebar {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.sidebar-card {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.sidebar-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.sidebar-card ul {
    list-style: none;
    padding: 0;
}

.sidebar-card li {
    margin-bottom: 0.5rem;
}

.sidebar-card a {
    text-decoration: none;
    color: var(--text-light);
    transition: var(--transition);
}

.sidebar-card a:hover {
    color: var(--primary-color);
}

/* Contact Form */
.contact-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.contact-item p {
    color: var(--text-light);
    line-height: 1.5;
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
}

.contact-item a:hover {
    text-decoration: underline;
}

/* Form Messages */
.form-message {
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-top: 1rem;
}

.form-message.success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #10b981;
}

.form-message.error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #ef4444;
}

/* Legal Content */
.legal-content {
    max-width: 800px;
    margin: 0 auto;
}

.legal-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    margin-top: 2rem;
    color: var(--text-color);
}

.legal-content h2:first-child {
    margin-top: 0;
}

.legal-content p {
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.legal-content ul {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.legal-content li {
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

.legal-content a {
    color: var(--primary-color);
    text-decoration: none;
}

.legal-content a:hover {
    text-decoration: underline;
}

/* No Results */
.no-results {
    text-align: center;
    padding: 3rem;
    color: var(--text-light);
}

.book-not-found {
    text-align: center;
    padding: 4rem 2rem;
}

.book-not-found h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.book-not-found p {
    color: var(--text-light);
    margin-bottom: 2rem;
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--text-color);
    color: white;
    padding: 1rem;
    z-index: 1000;
}

.cookie-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.cookie-content p {
    margin: 0;
    flex: 1;
}

.cookie-content button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
}

/* Footer */
.footer {
    background: var(--text-color);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

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

.footer-section h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-section p {
    color: #d1d5db;
    line-height: 1.5;
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

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

.footer-section a {
    color: #d1d5db;
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 1rem;
    text-align: center;
    color: #d1d5db;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 2rem 1rem;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .book-grid {
        grid-template-columns: 1fr;
    }
    
    .category-grid {
        grid-template-columns: 1fr;
    }
    
    .book-header {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .book-content {
        grid-template-columns: 1fr;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .books-filters {
        flex-direction: column;
    }
    
    .search-box,
    .filter-box {
        min-width: auto;
    }
    
    .cookie-content {
        flex-direction: column;
        text-align: center;
    }
    
    .categories-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .nav {
        padding: 1rem 15px;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .page-header p {
        font-size: 1rem;
    }
    
    .book-card,
    .category-card {
        padding: 1rem;
    }
    
    .category-book-item {
        flex-direction: column;
        text-align: center;
    }
    
    .category-book-item img {
        align-self: center;
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .cookie-banner,
    .nav-toggle,
    .btn-primary,
    .btn-secondary {
        display: none;
    }
    
    .book-links {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
    
    h1, h2, h3, h4 {
        page-break-after: avoid;
    }
    
    .book-detail,
    .content-section {
        margin: 0;
        padding: 0;
    }
}

<!--