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

body {
    font-family: 'Georgia', serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

a {
    text-decoration: none;
    color: #1a5276;
    transition: color 0.3s ease;
}

a:hover {
    color: #2980b9;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 20px;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 30px;
    color: #2c3e50;
    text-align: center;
}

/* Header Styles */
header {
    background-color: #000;
    color: #fff;
    padding: 20px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

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

.logo h1 {
    font-size: 1.8rem;
    font-weight: normal;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    color: #fff;
    font-size: 1.1rem;
}

nav ul li a:hover {
    color: #3498db;
}

/* Hero Section */
.hero {
    background-color: #2c3e50;
    color: #fff;
    text-align: center;
    padding: 150px 20px 100px;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 20px;
    color: #fff;
}

.hero-content p {
    font-size: 1.5rem;
    max-width: 800px;
    margin: 0 auto;
}

/* Books Section */
.books {
    background-color: #fff;
}

.book-container {
    display: flex;
    flex-direction: column;
    gap: 60px;
}

.book {
    display: flex;
    gap: 40px;
    align-items: center;
}

.book-image {
    flex: 0 0 300px;
}

.book-image img {
    width: 100%;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.book-info {
    flex: 1;
}

.book-info h3 {
    font-size: 2rem;
    margin-bottom: 10px;
    color: #2c3e50;
}

.book-info h4 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #7f8c8d;
    font-weight: normal;
    font-style: italic;
}

.book-meta {
    font-size: 1.1rem;
    color: #7f8c8d;
    margin-bottom: 20px;
}

.book-description {
    font-size: 1.1rem;
    margin-bottom: 25px;
    line-height: 1.7;
}

.book-links {
    margin-top: 20px;
}

.button {
    display: inline-block;
    padding: 10px 25px;
    background-color: #2c3e50;
    color: #fff;
    border-radius: 4px;
    font-size: 1rem;
    transition: background-color 0.3s ease;
}

.button:hover {
    background-color: #3498db;
    color: #fff;
}

/* Research Section */
.research {
    background-color: #f5f5f5;
}

.research-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
}

.research-item {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.research-item h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: #2c3e50;
}

.research-item p {
    font-size: 1.1rem;
    line-height: 1.7;
}

/* About Section */
.about {
    background-color: #fff;
}

.about-container {
    display: flex;
    gap: 50px;
    align-items: center;
}

.about-image {
    flex: 0 0 350px;
}

.about-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.about-info {
    flex: 1;
}

.about-info p {
    font-size: 1.1rem;
    margin-bottom: 20px;
    line-height: 1.7;
}

/* Footer */
footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 50px 0;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 30px;
    margin-bottom: 30px;
}

.footer-links a {
    color: #fff;
    font-size: 1.1rem;
}

.footer-links a:hover {
    color: #3498db;
}

.footer-social {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.footer-social a {
    color: #fff;
    font-size: 1.5rem;
}

.footer-social a:hover {
    color: #3498db;
}

.footer-copyright {
    text-align: center;
    font-size: 0.9rem;
    color: #bdc3c7;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .book {
        flex-direction: column;
        text-align: center;
    }
    
    .book-image {
        flex: 0 0 auto;
        max-width: 250px;
        margin: 0 auto;
    }
    
    .about-container {
        flex-direction: column;
        text-align: center;
    }
    
    .about-image {
        flex: 0 0 auto;
        max-width: 300px;
        margin: 0 auto 30px;
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
    }
    
    .logo {
        margin-bottom: 15px;
    }
    
    nav ul {
        justify-content: center;
    }
    
    nav ul li {
        margin: 0 15px;
    }
    
    .hero {
        padding: 180px 20px 80px;
    }
    
    .hero-content h2 {
        font-size: 2.5rem;
    }
    
    .hero-content p {
        font-size: 1.2rem;
    }
    
    .research-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    h2 {
        font-size: 2rem;
    }
    
    .book-info h3 {
        font-size: 1.8rem;
    }
    
    .book-info h4 {
        font-size: 1.2rem;
    }
    
    .footer-links {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
}