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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #fff;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
header {
    background: #fff;
    border-bottom: 1px solid #e5e5e5;
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    padding: 1rem 0;
}

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

.site-title {
    font-size: 1.5rem;
    color: #333;
    font-weight: 600;
}

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

.nav-menu a {
    text-decoration: none;
    color: #666;
    font-size: 0.95rem;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: #333;
}

/* Hero Section */
.hero {
    padding: 4rem 0;
    background: linear-gradient(135deg, #f5f5f5 0%, #fff 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #222;
}

.lead {
    font-size: 1.2rem;
    color: #555;
    margin-bottom: 1rem;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: #f39c12;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 1rem;
    transition: background 0.3s;
}

.btn:hover {
    background: #e67e22;
}

.hero-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

/* About Section */
.about {
    padding: 4rem 0;
}

.about h2 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 3rem;
    color: #333;
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
    align-items: start;
}

.about-text p {
    margin-bottom: 1rem;
    color: #666;
}

.about-images {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.about-img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

/* Book Section */
.book {
    padding: 4rem 0;
    background: #f9f9f9;
}

.book h2 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 3rem;
    color: #333;
}

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

.book-cover img {
    width: 100%;
    max-width: 300px;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.book-info h3 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.subtitle {
    font-style: italic;
    color: #777;
    margin-bottom: 1.5rem;
}

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

.book-status {
    display: inline-block;
    padding: 12px 30px;
    background: #f39c12;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-size: 1rem;
    margin-top: 1rem;
}

/* Contact Section */
.contact {
    padding: 4rem 0;
}

.contact h2 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 1rem;
    color: #333;
}

.contact p {
    text-align: center;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* Footer */
footer {
    background: #333;
    color: #fff;
    padding: 2rem 0;
    text-align: center;
}

footer p {
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    nav .container {
        flex-direction: column;
    }
    
    .hero .container,
    .about-content,
    .book-content {
        grid-template-columns: 1fr;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .about-images {
        flex-direction: row;
    }
    
    .book-cover {
        text-align: center;
    }
}