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

body {
    font-family: Georgia, 'Times New Roman', serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.advertorial-badge {
    background-color: #e8e8e8;
    text-align: center;
    padding: 8px;
    font-size: 12px;
    color: #666;
    border-bottom: 1px solid #ddd;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

header {
    padding: 30px 40px;
    background-color: #fff;
}

h1 {
    font-size: 32px;
    color: #2c3e50;
    margin-bottom: 15px;
    line-height: 1.3;
}

.meta-info {
    color: #7f8c8d;
    font-size: 14px;
    margin-bottom: 20px;
}

.hero-section {
    display: flex;
    align-items: center;
    gap: 30px;
    padding: 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.book-cover-hero {
    width: 300px;
    height: auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border-radius: 8px;
}

.hero-content h2 {
    font-size: 28px;
    margin-bottom: 15px;
}

.hero-content p {
    font-size: 18px;
    line-height: 1.6;
    margin-bottom: 20px;
}

.hero-cta {
    display: inline-block;
    background-color: #e67e22;
    color: #fff;
    padding: 12px 30px;
    text-decoration: none;
    font-size: 16px;
    font-weight: bold;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.hero-cta:hover {
    background-color: #d35400;
}

.featured-image {
    width: 100%;
    height: auto;
    display: block;
}

.content {
    padding: 40px;
}

.content p {
    margin-bottom: 20px;
    font-size: 18px;
    text-align: justify;
}

.content h2 {
    font-size: 26px;
    color: #2c3e50;
    margin: 30px 0 15px;
}

.content h3 {
    font-size: 22px;
    color: #34495e;
    margin: 25px 0 12px;
}

.content-image {
    width: 100%;
    max-width: 600px;
    height: auto;
    display: block;
    margin: 25px auto;
    border-radius: 4px;
}

.book-showcase {
    display: flex;
    align-items: center;
    gap: 30px;
    background-color: #f9f9f9;
    padding: 30px;
    margin: 30px 0;
    border-radius: 8px;
}

.book-cover-showcase {
    width: 200px;
    height: auto;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    border-radius: 4px;
    flex-shrink: 0;
}

.author-section {
    background-color: #f9f9f9;
    padding: 30px;
    margin: 30px 0;
    border-left: 4px solid #3498db;
    display: flex;
    align-items: center;
    gap: 20px;
}

.author-photo {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
}

.author-info h3 {
    margin: 0 0 5px 0;
    font-size: 20px;
}

.author-info p {
    margin: 0;
    font-size: 16px;
    color: #666;
}

.cta-section {
    background-color: #ecf0f1;
    padding: 40px;
    text-align: center;
    margin: 30px 0;
}

.cta-section h2 {
    margin-bottom: 20px;
    color: #2c3e50;
}

.cta-button {
    display: inline-block;
    background-color: #e67e22;
    color: #fff;
    padding: 15px 40px;
    text-decoration: none;
    font-size: 18px;
    font-weight: bold;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.cta-button:hover {
    background-color: #d35400;
}

.book-features {
    background-color: #fff;
    padding: 20px;
    margin: 20px 0;
    border: 1px solid #ddd;
}

.book-features ul {
    list-style-position: inside;
    padding-left: 20px;
}

.book-features li {
    margin-bottom: 10px;
    font-size: 17px;
}

footer {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 40px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.footer-links a {
    color: #3498db;
    text-decoration: none;
}

.footer-links a:hover {
    text-decoration: underline;
}

.research-links {
    margin: 30px 0;
    padding: 20px;
    background-color: #34495e;
    border-radius: 4px;
}

.research-links h4 {
    margin-bottom: 15px;
    font-size: 16px;
}

.research-links a {
    display: block;
    color: #3498db;
    text-decoration: none;
    margin-bottom: 8px;
    font-size: 14px;
}

.research-links a:hover {
    text-decoration: underline;
}

.disclosures {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid #34495e;
}

.disclosure-item {
    margin-bottom: 20px;
    font-size: 12px;
    line-height: 1.5;
    color: #bdc3c7;
}

.disclosure-item strong {
    display: block;
    margin-bottom: 5px;
    color: #ecf0f1;
}

@media (max-width: 768px) {
    .hero-section {
        flex-direction: column;
        text-align: center;
    }

    .book-cover-hero {
        width: 200px;
    }

    .book-showcase {
        flex-direction: column;
        text-align: center;
    }

    .book-cover-showcase {
        width: 180px;
    }

    .content {
        padding: 20px;
    }

    h1 {
        font-size: 26px;
    }

    .content p {
        font-size: 16px;
    }

    .author-section {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: 15px;
    }
}