/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Georgia', 'Times New Roman', serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Arial', 'Helvetica', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: #2c3e50;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

a {
    color: #3498db;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #2980b9;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 1;
}

.btn-primary {
    background-color: #3498db;
    color: white;
}

.btn-primary:hover {
    background-color: #2980b9;
    color: white;
}

.btn-secondary {
    background-color: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background-color: #7f8c8d;
    color: white;
}

.btn-outline {
    background-color: transparent;
    color: #3498db;
    border: 2px solid #3498db;
}

.btn-outline:hover {
    background-color: #3498db;
    color: white;
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: #2c3e50;
    color: white;
    padding: 1rem;
    z-index: 1000;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
}

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

.cookie-content p {
    margin: 0;
    flex: 1;
    min-width: 300px;
}

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

.cookie-link {
    color: #ecf0f1;
    text-decoration: underline;
}

/* Header */
.header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: #2c3e50;
    text-decoration: none;
}

.logo, .footer-logo {
    width: 32px;
    height: 32px;
}

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

.nav-link {
    color: #2c3e50;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.nav-link.active,
.nav-link:hover {
    color: #3498db;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: #3498db;
}

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: #2c3e50;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('/assets/hero-bg.svg');
    background-size: cover;
    background-position: center;
    opacity: 0.1;
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: white;
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

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

.categories-preview {
    background-color: #f8f9fa;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    margin-bottom: 0.5rem;
}

.section-header p {
    color: #666;
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.section-footer {
    text-align: center;
    margin-top: 3rem;
}

/* Books Grid */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.book-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e9ecef;
}

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

.book-image {
    width: 80px;
    height: 120px;
    margin: 0 auto 1rem;
    display: block;
    border-radius: 4px;
}

.book-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.book-author {
    color: #666;
    font-style: italic;
    margin-bottom: 0.5rem;
}

.book-category {
    display: inline-block;
    background-color: #e3f2fd;
    color: #1976d2;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.book-description {
    color: #555;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.btn-small {
    padding: 8px 16px;
    font-size: 0.875rem;
}

/* Categories Grid */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.category-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e9ecef;
}

.category-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

.category-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.category-card h3 {
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.category-count {
    color: #666;
    font-size: 0.9rem;
}

/* Book Detail Page */
.book-detail {
    padding: 2rem 0;
}

.book-detail-content {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.book-detail-image {
    width: 200px;
    height: 300px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.book-meta h1 {
    margin-bottom: 0.5rem;
}

.book-meta .book-author {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.book-meta .book-category {
    margin-bottom: 1rem;
}

.book-year {
    color: #666;
    margin-bottom: 1rem;
}

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

.disclaimer-note {
    background-color: #f8f9fa;
    border-left: 4px solid #3498db;
    padding: 1rem;
    margin: 2rem 0;
    border-radius: 0 4px 4px 0;
}

.book-sections {
    display: grid;
    gap: 2rem;
}

.book-section {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 8px;
}

.book-section h3 {
    margin-bottom: 1rem;
    color: #2c3e50;
}

.key-takeaways {
    list-style: none;
    padding: 0;
}

.key-takeaways li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
}

.key-takeaways li::before {
    content: '•';
    color: #3498db;
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* Search and Filter */
.search-filter {
    background-color: #f8f9fa;
    padding: 2rem 0;
    margin-bottom: 2rem;
}

.search-filter-content {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: center;
}

.search-box {
    flex: 1;
    min-width: 300px;
}

.search-box input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1rem;
}

.filter-select select {
    padding: 12px 16px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1rem;
    background-color: white;
    min-width: 200px;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #2c3e50;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-card {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
}

.contact-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto 1rem;
    background: #3498db;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

/* Footer */
.footer {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 3rem 0 1rem;
}

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

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.footer-brand h3 {
    color: #ecf0f1;
    margin: 0;
}

.footer-section h4 {
    color: #ecf0f1;
    margin-bottom: 1rem;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: #bdc3c7;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #ecf0f1;
}

.contact-info p {
    margin-bottom: 0.5rem;
    color: #bdc3c7;
}

.contact-info a {
    color: #bdc3c7;
}

.contact-info a:hover {
    color: #ecf0f1;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .books-grid {
        grid-template-columns: 1fr;
    }
    
    .book-detail-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .book-detail-image {
        margin: 0 auto;
    }
    
    .search-filter-content {
        flex-direction: column;
    }
    
    .search-box {
        min-width: 100%;
    }
    
    .cookie-content {
        flex-direction: column;
        text-align: center;
    }
    
    .cookie-content p {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    
    .book-card,
    .category-card {
        padding: 1rem;
    }
    
    .hero {
        padding: 2rem 0;
    }
    
    .featured-books,
    .categories-preview {
        padding: 2rem 0;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }