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

:root {
    --primary-color: #0c1b33;
    --secondary-color: #1a2d50;
    --accent-color: #ffd700;
    --accent-hover: #ffcc00;
    --text-primary: #ffffff;
    --text-secondary: #b8c5d1;
    --card-bg: #1e2a4a;
    --border-color: #2a3d5a;
    --gradient-primary: linear-gradient(135deg, #0c1b33 0%, #1a2d50 100%);
    --gradient-accent: linear-gradient(135deg, #ffd700 0%, #ffcc00 100%);
    --shadow-light: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 8px 25px rgba(0, 0, 0, 0.2);
    --shadow-heavy: 0 20px 40px rgba(0, 0, 0, 0.3);
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--gradient-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(12, 27, 51, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h2 {
    color: var(--accent-color);
    font-weight: 600;
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link:hover {
    color: var(--accent-color);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 0 20px;
    background: var(--gradient-primary);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(255, 215, 0, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(26, 45, 80, 0.3) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    z-index: 2;
    position: relative;
}

.hero h1 {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin: 3rem 0;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-color);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--gradient-accent);
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    border-radius: var(--border-radius);
    transition: var(--transition);
    box-shadow: var(--shadow-medium);
    animation: fadeInUp 1s ease-out 0.6s both;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

.floating-books {
    position: absolute;
    top: 20%;
    right: 10%;
    z-index: 1;
}

.floating-books i {
    position: absolute;
    color: var(--accent-color);
    opacity: 0.3;
    animation: float 6s ease-in-out infinite;
}

.floating-books i:nth-child(1) {
    font-size: 3rem;
    animation-delay: 0s;
}

.floating-books i:nth-child(2) {
    font-size: 2rem;
    left: 50px;
    top: 30px;
    animation-delay: 2s;
}

.floating-books i:nth-child(3) {
    font-size: 2.5rem;
    left: -20px;
    top: 60px;
    animation-delay: 4s;
}

/* Books Section */
.books-section {
    padding: 5rem 0;
    background: var(--primary-color);
    position: relative;
}

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Book Categories */
.book-categories {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.category-btn {
    padding: 0.75rem 1.5rem;
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    border-radius: 50px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.category-btn.active,
.category-btn:hover {
    background: var(--gradient-accent);
    color: var(--primary-color);
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

/* Books Grid */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.book-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
}

.book-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-heavy);
    border-color: var(--accent-color);
}

.book-image {
    position: relative;
    height: 280px;
    width: 100%;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--secondary-color);
}

.book-image img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: var(--transition);
    border-radius: 4px;
}

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

.book-overlay {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
}

.language-tag,
.series-tag {
    background: rgba(0, 0, 0, 0.8);
    color: var(--accent-color);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.series-tag {
    background: var(--gradient-accent);
    color: var(--primary-color);
}

.book-content {
    padding: 1.5rem;
}

.book-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.book-excerpt {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.book-description {
    display: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 1rem;
}

.book-description.show {
    display: block;
    animation: fadeIn 0.3s ease;
}

.book-description p {
    margin-bottom: 0.8rem;
}

.book-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.read-more-btn {
    background: none;
    border: none;
    color: var(--accent-color);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.read-more-btn:hover {
    color: var(--accent-hover);
}

.read-more-btn.expanded i {
    transform: rotate(180deg);
}

.buy-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--gradient-accent);
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-size: 0.9rem;
}

.buy-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

/* About Section */
.about-section {
    padding: 5rem 0;
    background: var(--secondary-color);
}

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

.about-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.about-content p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.about-features {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 3rem;
}

.feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
}

.feature i {
    color: var(--accent-color);
    font-size: 1.2rem;
}

/* Footer */
.footer {
    background: var(--primary-color);
    padding: 3rem 0 1rem;
    border-top: 1px solid var(--border-color);
}

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

.footer-section h3 {
    color: var(--accent-color);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.footer-section h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.6;
}

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

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--card-bg);
    color: var(--text-primary);
    border-radius: 50%;
    transition: var(--transition);
    text-decoration: none;
}

.social-links a:hover {
    background: var(--accent-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* Custom icons for social media platforms */
.social-links a[title="Threads"] .custom-icon::before {
    content: "@";
    font-family: 'Poppins', sans-serif;
    font-weight: bold;
    font-style: normal;
    font-size: 1.2em;
    line-height: 1;
}

.social-links a[title="X (Twitter)"] .custom-icon::before {
    content: "𝕏";
    font-family: 'Arial', sans-serif;
    font-weight: bold;
    font-style: normal;
    font-size: 1.1em;
    line-height: 1;
}

.custom-icon {
    display: inline-block;
    width: 1em;
    height: 1em;
    text-align: center;
}

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

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
    }
    to {
        opacity: 1;
        max-height: 500px;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        height: 100vh;
        width: 100%;
        background: rgba(12, 27, 51, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: var(--transition);
        z-index: 999;
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .nav-link {
        font-size: 1.5rem;
        margin: 1rem 0;
    }
    
    .hamburger {
        z-index: 1001;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .books-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .about-features {
        flex-direction: column;
        gap: 1rem;
    }
    
    .book-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .buy-btn {
        justify-content: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .book-card {
        margin: 0 10px;
    }
    
    .hero {
        padding: 0 15px;
    }
    
    .category-btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
}