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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #3f7652;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    max-width: 800px;
    width: 100%;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background: #3f7652;
    color: white;
    padding: 60px 40px;
    text-align: center;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1.3rem;
    opacity: 0.95;
    font-weight: 300;
}

main {
    padding: 60px 40px;
}

.book-info {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
    align-items: start;
}

.book-cover {
    display: flex;
    justify-content: center;
}

.cover-image {
    width: 200px;
    height: auto;
    max-width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    object-fit: cover;
}

.book-details h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: #333;
}

.book-details p {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 30px;
    line-height: 1.8;
}

.cta-section {
    margin-top: 30px;
}

.buy-button {
    display: inline-block;
    background: rgb(248, 191, 15);
    color: #333;
    padding: 16px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 15px rgba(248, 191, 15, 0.4);
}

.buy-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(248, 191, 15, 0.5);
}

.buy-button:active {
    transform: translateY(0);
}

footer {
    background: #f8f9fa;
    padding: 30px 40px;
    text-align: center;
    color: #666;
    border-top: 1px solid #e9ecef;
}

/* Responsive Design */
@media (max-width: 768px) {
    header {
        padding: 40px 30px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1.1rem;
    }
    
    main {
        padding: 40px 30px;
    }
    
    .book-info {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .cover-image {
        width: 150px;
    }
    
    .book-details h2 {
        font-size: 1.5rem;
        text-align: center;
    }
    
    .book-details p {
        text-align: center;
    }
    
    .cta-section {
        text-align: center;
    }
}