@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

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

body {
    font-family: 'Inter', system-ui, sans-serif;
    line-height: 1.6;
    color: #0f0f0f;
    background-color: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Hero Section */
.hero-section {
    padding: 4rem 0 6rem;
    background: linear-gradient(135deg, #f8f9fa, #ffffff);
    text-align: center;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 3.5rem;
    }
}

@media (min-width: 1024px) {
    .hero-title {
        font-size: 4rem;
    }
}

.gradient-text {
    background: linear-gradient(135deg, #ff6b35, #ff8c42);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.125rem;
    color: #6b7280;
    margin-bottom: 3rem;
    max-width: 64rem;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

@media (min-width: 768px) {
    .hero-description {
        font-size: 1.25rem;
    }
}

.logo-container {
    margin-bottom: 2rem;
}

.logo-image {
    max-height: 16rem;
    height: auto;
    width: auto;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .logo-image {
        max-height: 20rem;
    }
}

@media (min-width: 1024px) {
    .logo-image {
        max-height: 24rem;
    }
}

.cta-button {
    background-color: #ff6b35;
    color: white;
    font-size: 1.125rem;
    font-weight: 700;
    padding: 1rem 2rem;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

@media (min-width: 768px) {
    .cta-button {
        font-size: 1.25rem;
        padding: 1rem 3rem;
    }
}

.cta-button:hover {
    background-color: #e55a2b;
}

/* Themes Section */
.themes-section {
    padding: 4rem 0 5rem;
    background-color: white;
}

.themes-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .themes-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .themes-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.theme-block {
    text-align: center;
}

.theme-image {
    margin-bottom: 1.5rem;
}

.theme-image img {
    max-width: 100%;
    height: auto;
}

.theme-block h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: #0f0f0f;
}

.theme-block p {
    color: #6b7280;
    line-height: 1.7;
}

/* Testimonials Section */
.testimonials-section {
    padding: 4rem 0 5rem;
    background-color: #f8f9fa;
}

.testimonials-section h2 {
    font-size: 1.875rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: #0f0f0f;
}

@media (min-width: 768px) {
    .testimonials-section h2 {
        font-size: 2.25rem;
    }
}

.testimonials-carousel {
    position: relative;
    max-width: 64rem;
    margin: 0 auto;
}

.carousel-inner {
    overflow: hidden;
    border-radius: 0.75rem;
}

.testimonial-slide {
    display: none;
    padding: 0 1rem;
}

.testimonial-slide.active {
    display: block;
}

.testimonial-slide img {
    max-width: 100%;
    height: auto;
    border-radius: 0.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    margin: 0 auto;
    display: block;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: white;
    border: none;
    border-radius: 50%;
    width: 3rem;
    height: 3rem;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease;
    z-index: 10;
}

.carousel-btn:hover {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.carousel-btn.prev {
    left: 0;
}

.carousel-btn.next {
    right: 0;
}

/* Benefits Section */
.benefits-section {
    padding: 4rem 0 5rem;
    background-color: white;
}

.benefits-section h2 {
    font-size: 1.875rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    line-height: 1.3;
    color: #0f0f0f;
}

@media (min-width: 768px) {
    .benefits-section h2 {
        font-size: 2.25rem;
    }
}

.benefits-subtitle {
    font-size: 1.25rem;
    text-align: center;
    color: #ff6b35;
    font-weight: 600;
    margin-bottom: 4rem;
}

.benefits-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .benefits-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.benefit-card {
    text-align: center;
    padding: 1.5rem;
    border-radius: 0.75rem;
    background-color: #f8f9fa;
    transition: background-color 0.3s ease;
}

.benefit-card:hover {
    background-color: #e9ecef;
}

.benefit-icon {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.benefit-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: #0f0f0f;
}

.benefit-card p {
    color: #6b7280;
}

/* Cost-Benefit Section */
.cost-benefit-section {
    padding: 4rem 0 5rem;
    background-color: #f8f9fa;
}

.cost-benefit-section h2 {
    font-size: 1.875rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: #0f0f0f;
}

@media (min-width: 768px) {
    .cost-benefit-section h2 {
        font-size: 2.25rem;
    }
}

.cost-benefit-section p {
    font-size: 1.125rem;
    text-align: center;
    color: #6b7280;
    margin-bottom: 4rem;
    max-width: 64rem;
    margin-left: auto;
    margin-right: auto;
}

.books-carousel {
    position: relative;
    max-width: 72rem;
    margin: 0 auto;
}

.book-slide {
    display: none;
    padding: 0 1rem;
}

.book-slide.active {
    display: block;
}

.book-card {
    background: white;
    border-radius: 0.75rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
    max-width: 20rem;
    margin: 0 auto;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.book-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.book-cover {
    width: 8rem;
    height: 12rem;
    border-radius: 0.5rem;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
    padding: 1rem;
}

.blue-gradient {
    background: linear-gradient(to bottom, #3b82f6, #1d4ed8);
}

.purple-gradient {
    background: linear-gradient(to bottom, #8b5cf6, #7c3aed);
}

.pink-gradient {
    background: linear-gradient(to bottom, #ec4899, #be185d);
}

.gray-gradient {
    background: linear-gradient(to bottom, #374151, #000000);
}

.book-title {
    font-size: 0.875rem;
    font-weight: 700;
}

.book-author {
    font-size: 0.75rem;
    margin-top: 0.5rem;
}

.book-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    color: #0f0f0f;
}

.book-price {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    color: #ff6b35;
}

/* Final Offer Section */
.final-offer-section {
    padding: 4rem 0 6rem;
    background: linear-gradient(135deg, #ff6b35, #ff8c42);
    color: white;
    text-align: center;
}

.final-offer-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
    .final-offer-section h2 {
        font-size: 3rem;
    }
}

.offer-description {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
}

@media (min-width: 768px) {
    .offer-description {
        font-size: 1.875rem;
    }
}

.pricing {
    margin-bottom: 2rem;
}

.original-price {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

@media (min-width: 768px) {
    .original-price {
        font-size: 1.5rem;
    }
}

.crossed-out {
    text-decoration: line-through;
    color: rgba(255, 255, 255, 0.7);
}

.final-price {
    font-size: 3rem;
    font-weight: 700;
}

@media (min-width: 768px) {
    .final-price {
        font-size: 3.75rem;
    }
}

.price-value {
    color: #fef3c7;
}

.buy-button {
    display: inline-block;
    background: white;
    color: #ff6b35;
    font-size: 1.25rem;
    font-weight: 700;
    padding: 1rem 3rem;
    border-radius: 0.5rem;
    text-decoration: none;
    margin-bottom: 2rem;
    transition: background-color 0.3s ease;
}

@media (min-width: 768px) {
    .buy-button {
        font-size: 1.5rem;
    }
}

.buy-button:hover {
    background-color: #f3f4f6;
}

.guarantee {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    color: rgba(255, 255, 255, 0.9);
}

.check-icon {
    font-size: 2rem;
}

.guarantee-title {
    font-weight: 700;
    font-size: 1.125rem;
}

.guarantee-subtitle {
    font-size: 0.875rem;
}

/* FAQ Section */
.faq-section {
    padding: 4rem 0 5rem;
    background-color: white;
}

.faq-section h2 {
    font-size: 1.875rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: #0f0f0f;
}

@media (min-width: 768px) {
    .faq-section h2 {
        font-size: 2.25rem;
    }
}

.faq-list {
    max-width: 64rem;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid #e5e7eb;
    padding-bottom: 1rem;
    margin-bottom: 1rem;
}

.faq-question {
    width: 100%;
    text-align: left;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    background: none;
    border: none;
    font-size: 1.125rem;
    font-weight: 600;
    color: #0f0f0f;
    cursor: pointer;
    outline: none;
}

.faq-icon {
    font-size: 1.5rem;
    color: #6b7280;
    transition: transform 0.3s ease;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer.open {
    max-height: 24rem;
}

.faq-content {
    padding-bottom: 1rem;
    color: #6b7280;
}

/* Footer */
.footer {
    padding: 2rem 0;
    background-color: #0f0f0f;
    color: white;
    text-align: center;
}

.footer-content {
    margin-bottom: 1rem;
}

.footer-content p {
    font-size: 0.875rem;
}

.footer-credits {
    color: #9ca3af;
}

.footer-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

@media (min-width: 768px) {
    .footer-links {
        flex-direction: row;
        justify-content: center;
        gap: 1.5rem;
    }
}

.footer-links a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: white;
}

/* Responsive adjustments */
@media (max-width: 640px) {
    .hero-title {
        font-size: 2rem;
        line-height: 1.2;
    }
}