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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
}

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

/* Header */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem 0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.language-selector {
    display: flex;
    gap: 10px;
}

.lang-btn {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.5);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.lang-btn.active {
    background: white;
    color: #667eea;
    border-color: white;
}

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

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Main Content */
.main-content {
    padding: 3rem 0;
}

/* Author Sections */
.author-section {
    background: white;
    border-radius: 20px;
    padding: 2.5rem;
    margin-bottom: 3rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.author-section:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.author-name {
    font-size: 2rem;
    color: #667eea;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.author-description {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 2rem;
    font-style: italic;
}

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

/* Book Card */
.book-card {
    background: #f8f9fa;
    border-radius: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.book-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.book-cover {
    width: 100%;
    height: 400px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.book-cover img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.3s ease;
    background: white;
}

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

.book-info {
    padding: 1.5rem;
}

.book-title {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: #333;
    font-weight: 600;
    min-height: 2.5rem;
}

.book-links {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.amazon-link {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.amazon-fr {
    background: #FF9900;
    color: white;
}

.amazon-fr:hover {
    background: #e68a00;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(255, 153, 0, 0.3);
}

.amazon-com {
    background: #232F3E;
    color: white;
}

.amazon-com:hover {
    background: #131921;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(35, 47, 62, 0.3);
}

/* Footer */
.footer {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-section h3 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.email-link {
    color: white;
    text-decoration: none;
    font-size: 1.1rem;
    border-bottom: 2px solid transparent;
    transition: border-color 0.3s ease;
}

.email-link:hover {
    border-bottom-color: white;
}

.copyright {
    font-size: 0.9rem;
    opacity: 0.9;
}

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

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

    .author-section {
        padding: 1.5rem;
    }

    .author-name {
        font-size: 1.5rem;
    }

    .books-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1.5rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .header .container {
        flex-direction: column;
        gap: 1rem;
    }

    .logo {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .books-grid {
        grid-template-columns: 1fr;
    }

    .book-cover {
        height: 350px;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.author-section {
    animation: fadeIn 0.6s ease;
}

.book-card {
    animation: fadeIn 0.8s ease;
}