:root {
    --primary-color: #4a6ee0;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --success-color: #28a745;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--light-color);
}

header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 0;
}

.hero-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 0;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    margin-top: -50px;
}

.book-cover {
    max-width: 300px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    border-radius: 5px;
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    font-weight: bold;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s ease;
    margin-top: 1.5rem;
}

.cta-button:hover {
    background-color: #c0392b;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin: 2rem 0 1rem;
}

h3 {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin: 1.5rem 0 1rem;
}

p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.feature-card {
    background-color: white;
    padding: 2rem;
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card h3 {
    color: var(--primary-color);
    margin-top: 0;
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.chapters {
    background-color: white;
    padding: 2rem;
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    margin: 3rem 0;
}

.chapter-list {
    list-style: none;
}

.chapter-list li {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
}

.chapter-list li:before {
    content: "✓";
    color: var(--success-color);
    position: absolute;
    left: 0;
}

.testimonials {
    background-color: var(--primary-color);
    color: white;
    padding: 3rem 0;
    margin: 3rem 0;
    border-radius: 5px;
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.testimonial-card {
    background-color: rgba(255,255,255,0.1);
    padding: 1.5rem;
    border-radius: 5px;
    position: relative;
}

.testimonial-card p {
    font-style: italic;
}

.testimonial-author {
    font-weight: bold;
    margin-top: 1rem;
    text-align: right;
}

.author-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    background-color: white;
    padding: 2rem;
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    margin: 3rem 0;
}

.author-image {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 1.5rem;
}

.faq-section {
    background-color: white;
    padding: 2rem;
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    margin: 3rem 0;
}

.faq-item {
    margin-bottom: 1.5rem;
}

.faq-question {
    font-weight: bold;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.bonus-section {
    background-color: #fef9e7;
    padding: 2rem;
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    margin: 3rem 0;
    border: 2px dashed #f39c12;
}

.guarantee-badge {
    display: block;
    width: 150px;
    height: 150px;
    margin: 2rem auto;
}

footer {
    background-color: var(--secondary-color);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

.price-section {
    text-align: center;
    margin: 3rem 0;
}

.price-tag {
    font-size: 3rem;
    font-weight: bold;
    color: var(--primary-color);
    margin: 1rem 0;
}

.regular-price {
    text-decoration: line-through;
    color: #777;
    font-size: 1.5rem;
    margin-right: 1rem;
}

.countdown {
    background-color: var(--accent-color);
    color: white;
    padding: 1rem;
    border-radius: 5px;
    font-weight: bold;
    margin: 1.5rem 0;
    display: inline-block;
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .features, .testimonial-grid {
        grid-template-columns: 1fr;
    }
}