/* Reset e Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #1f2937;
    background-color: #ffffff;
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
    margin-bottom: 1rem;
    font-weight: 400;
}

/* Utility Classes */
.highlight {
    color: #2563eb;
    font-weight: 700;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    color: #1f2937;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #2563eb, #16a34a);
    margin: 1rem auto;
    border-radius: 2px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: white;
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(37, 99, 235, 0.4);
}

.btn-large {
    padding: 1.5rem 3rem;
    font-size: 1.2rem;
}

.btn-cta {
    background: linear-gradient(135deg, #16a34a, #15803d);
    animation: pulse-green 2s infinite;
}

.btn-final {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    animation: pulse-red 2s infinite;
}

/* Animations */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes pulse-green {
    0%, 100% { box-shadow: 0 10px 30px rgba(22, 163, 74, 0.3); }
    50% { box-shadow: 0 15px 40px rgba(22, 163, 74, 0.5); }
}

@keyframes pulse-red {
    0%, 100% { box-shadow: 0 10px 30px rgba(220, 38, 38, 0.3); }
    50% { box-shadow: 0 15px 40px rgba(220, 38, 38, 0.5); }
}

.pulse {
    animation: pulse 2s infinite;
}

/* Fade In Animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.8s ease-out;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 4rem 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="%23000" opacity="0.02"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    margin-bottom: 1.5rem;
    color: #1f2937;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #6b7280;
    margin-bottom: 2rem;
    font-weight: 400;
}

.hero-cta {
    margin-bottom: 2rem;
}

.guarantee {
    margin-top: 1rem;
    color: #16a34a;
    font-weight: 500;
    text-align: center;
}

.social-proof {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.rating {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: #6b7280;
}

.stars {
    color: #fbbf24;
    font-size: 1.2rem;
}

/* Hero Image */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.mockup-ebook {
    perspective: 1000px;
    transform-style: preserve-3d;
}

.ebook-cover {
    width: 300px;
    height: 400px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    border-radius: 15px;
    padding: 2rem;
    color: white;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: 0 20px 60px rgba(37, 99, 235, 0.3);
    transform: rotateY(-15deg) rotateX(5deg);
    transition: transform 0.3s ease;
}

.ebook-cover:hover {
    transform: rotateY(-10deg) rotateX(2deg) scale(1.05);
}

.ebook-cover h3 {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
}

.ebook-cover p {
    font-size: 1.1rem;
    text-align: center;
    opacity: 0.9;
}

.author {
    font-size: 0.9rem;
    text-align: center;
    opacity: 0.8;
    margin-top: auto;
}

/* Problem Solution Section */
.problem-solution {
    padding: 5rem 0;
    background: #ffffff;
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.problem-item {
    background: #f8fafc;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.problem-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.problem-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.problem-item h3 {
    color: #dc2626;
    margin-bottom: 1rem;
}

.solution {
    background: linear-gradient(135deg, #16a34a, #15803d);
    color: white;
    padding: 3rem;
    border-radius: 20px;
    text-align: center;
    margin-top: 3rem;
}

.solution h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

/* Benefits Section */
.benefits {
    padding: 5rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.benefit-item {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.benefit-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.benefit-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.benefit-item h3 {
    color: #2563eb;
    margin-bottom: 1rem;
}

/* Testimonials Section */
.testimonials {
    padding: 5rem 0;
    background: #ffffff;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.testimonial-item {
    background: #f8fafc;
    padding: 2.5rem;
    border-radius: 15px;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.testimonial-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.testimonial-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 1rem;
}

.testimonial-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.testimonial-content {
    text-align: center;
}

.testimonial-content .stars {
    color: #fbbf24;
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.testimonial-content p {
    font-style: italic;
    margin-bottom: 1.5rem;
    color: #4b5563;
}

.testimonial-author strong {
    color: #1f2937;
    display: block;
}

.testimonial-author span {
    color: #6b7280;
    font-size: 0.9rem;
}

/* About eBook Section */
.about-ebook {
    padding: 5rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h3 {
    color: #2563eb;
    margin-bottom: 2rem;
}

.features-list {
    list-style: none;
    margin-bottom: 2rem;
}

.features-list li {
    padding: 0.5rem 0;
    font-size: 1.1rem;
}

.bonus-section {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    border: 2px solid #16a34a;
    margin-top: 2rem;
}

.bonus-section h4 {
    color: #16a34a;
    margin-bottom: 1rem;
}

.bonus-list {
    list-style: none;
    margin-bottom: 1rem;
}

.bonus-list li {
    padding: 0.3rem 0;
}

.bonus-total {
    font-size: 1.2rem;
    color: #16a34a;
    text-align: center;
    margin: 0;
}

/* eBook Preview */
.ebook-preview {
    perspective: 1000px;
    display: flex;
    justify-content: center;
}

.preview-pages {
    position: relative;
    transform-style: preserve-3d;
}

.page {
    width: 200px;
    height: 280px;
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 1.5rem;
    position: absolute;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.page-1 {
    transform: translateZ(20px);
    z-index: 3;
}

.page-2 {
    transform: translateZ(10px) translateX(10px);
    z-index: 2;
}

.page-3 {
    transform: translateZ(0px) translateX(20px);
    z-index: 1;
}

.page h4 {
    color: #2563eb;
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.page p {
    color: #6b7280;
    font-size: 0.9rem;
}

/* Special Offer Section */
.special-offer {
    padding: 5rem 0;
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    color: white;
    text-align: center;
}

.offer-title {
    color: #fbbf24;
    margin-bottom: 3rem;
}

.price-section {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.original-price {
    text-align: center;
}

.original-price .price-value {
    font-size: 2rem;
    text-decoration: line-through;
    color: #dc2626;
    font-weight: 600;
}

.current-price {
    text-align: center;
    position: relative;
}

.current-price .price-value {
    font-size: 4rem;
    color: #16a34a;
    font-weight: 700;
}

.discount {
    position: absolute;
    top: -10px;
    right: -20px;
    background: #dc2626;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    transform: rotate(15deg);
}

.price-label {
    display: block;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: #d1d5db;
}

.urgency-section {
    margin-bottom: 3rem;
}

.urgency-text {
    font-size: 1.2rem;
    color: #fbbf24;
    margin-bottom: 2rem;
}

.countdown {
    margin-bottom: 2rem;
}

.countdown p {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: #d1d5db;
}

.countdown-timer {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.time-unit {
    background: rgba(255, 255, 255, 0.1);
    padding: 1rem;
    border-radius: 10px;
    min-width: 80px;
    backdrop-filter: blur(10px);
}

.time-unit span {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #fbbf24;
}

.time-unit label {
    font-size: 0.9rem;
    color: #d1d5db;
}

.payment-info {
    margin-top: 1.5rem;
    color: #d1d5db;
    font-size: 0.9rem;
    line-height: 1.8;
}

/* FAQ Section */
.faq {
    padding: 5rem 0;
    background: #ffffff;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: white;
}

.faq-question h3 {
    margin: 0;
    color: #1f2937;
    font-size: 1.1rem;
}

.faq-toggle {
    font-size: 1.5rem;
    color: #2563eb;
    font-weight: bold;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 1.5rem 1.5rem;
    max-height: 200px;
}

.faq-answer p {
    color: #6b7280;
    margin: 0;
}

/* Final CTA Section */
.final-cta {
    padding: 5rem 0;
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    color: white;
    text-align: center;
}

.final-cta h2 {
    color: white;
    margin-bottom: 1.5rem;
}

.final-cta p {
    font-size: 1.2rem;
    margin-bottom: 3rem;
    color: #fecaca;
}

.offer-box {
    background: rgba(255, 255, 255, 0.1);
    padding: 3rem;
    border-radius: 20px;
    max-width: 600px;
    margin: 0 auto;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.offer-box h3 {
    color: #fbbf24;
    margin-bottom: 2rem;
}

.offer-box ul {
    list-style: none;
    text-align: left;
    margin-bottom: 2rem;
}

.offer-box li {
    padding: 0.5rem 0;
    font-size: 1.1rem;
}

.final-price {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.old-price {
    font-size: 1.5rem;
    text-decoration: line-through;
    color: #fca5a5;
}

.new-price {
    font-size: 3rem;
    color: #fbbf24;
    font-weight: 700;
}

.urgency-final {
    margin-top: 1rem;
    color: #fbbf24;
    font-weight: 600;
}

/* Footer */
.footer {
    background: #1f2937;
    color: #d1d5db;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: white;
    margin-bottom: 1rem;
}

.footer-section p,
.footer-section a {
    color: #d1d5db;
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #2563eb;
}

.social-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.social-links a {
    display: inline-block;
    margin-bottom: 0;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 2rem;
    text-align: center;
}

.footer-bottom p {
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: #9ca3af;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .hero-image {
        order: -1;
    }
    
    .ebook-cover {
        width: 250px;
        height: 330px;
        transform: none;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .price-section {
        gap: 1rem;
    }
    
    .current-price .price-value {
        font-size: 3rem;
    }
    
    .countdown-timer {
        gap: 1rem;
    }
    
    .time-unit {
        min-width: 60px;
        padding: 0.8rem;
    }
    
    .time-unit span {
        font-size: 1.5rem;
    }
    
    .btn-large {
        padding: 1.2rem 2rem;
        font-size: 1rem;
    }
    
    .problems-grid,
    .benefits-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .preview-pages {
        transform: scale(0.8);
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 2rem 0;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .btn {
        width: 100%;
        padding: 1rem;
    }
    
    .offer-box {
        padding: 2rem 1rem;
    }
    
    .final-price {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .new-price {
        font-size: 2.5rem;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Print Styles */
@media print {
    .hero,
    .special-offer,
    .final-cta {
        background: white !important;
        color: black !important;
    }
    
    .btn {
        border: 2px solid black;
        background: white !important;
        color: black !important;
    }
}



/* eBooks Section */
.ebooks-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

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

.ebook-item {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.ebook-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.ebook-item.featured {
    border-color: #2563eb;
    background: linear-gradient(135deg, #ffffff 0%, #f0f7ff 100%);
}

.ebook-item.featured::before {
    content: '⭐ MAIS POPULAR';
    position: absolute;
    top: 15px;
    right: -30px;
    background: #2563eb;
    color: white;
    padding: 5px 40px;
    font-size: 0.8rem;
    font-weight: 600;
    transform: rotate(45deg);
}

.ebook-badge {
    display: inline-block;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ebook-item[data-level="iniciante"] .ebook-badge {
    background: linear-gradient(135deg, #16a34a, #15803d);
}

.ebook-item[data-level="intermediario"] .ebook-badge {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.ebook-item[data-level="avancado"] .ebook-badge {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
}

.ebook-item[data-level="expert"] .ebook-badge {
    background: linear-gradient(135deg, #7c3aed, #6d28d9);
}

.ebook-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-align: center;
}

.ebook-item h3 {
    color: #1f2937;
    margin-bottom: 1rem;
    font-size: 1.3rem;
    line-height: 1.3;
}

.ebook-description {
    color: #6b7280;
    margin-bottom: 1.5rem;
    font-size: 1rem;
    line-height: 1.6;
}

.ebook-features ul {
    list-style: none;
    margin-bottom: 2rem;
}

.ebook-features li {
    padding: 0.3rem 0;
    font-size: 0.95rem;
    color: #4b5563;
}

.ebook-price {
    text-align: center;
    margin-bottom: 2rem;
}

.ebook-price .price-value {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #2563eb;
    margin-bottom: 0.5rem;
}

.ebook-price .price-label {
    color: #6b7280;
    font-size: 0.9rem;
}

.ebook-item .btn {
    width: 100%;
    margin-top: auto;
}

.btn-featured {
    background: linear-gradient(135deg, #7c3aed, #6d28d9);
    animation: pulse-purple 2s infinite;
}
.ebook-cover {
    text-align: center;
    margin-bottom: 1rem;
}

.ebook-covera img {
    margin-left: 10px;
    width: 100%;
    max-width: 270px;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.ebook-coverab img {
    width: 100%;
    max-width: 270px;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.ebook-item:hover .ebook-cover img {
    transform: scale(1.05);
}

@keyframes pulse-purple {
    0%, 100% { box-shadow: 0 10px 30px rgba(124, 58, 237, 0.3); }
    50% { box-shadow: 0 15px 40px rgba(124, 58, 237, 0.5); }
}

/* Combo Offer */
.combo-offer {
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    color: white;
    padding: 3rem;
    border-radius: 20px;
    text-align: center;
    margin-top: 3rem;
    position: relative;
    overflow: hidden;
}

.combo-offer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    animation: shine 3s infinite;
}

@keyframes shine {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.combo-offer h3 {
    color: #fbbf24;
    margin-bottom: 1rem;
    font-size: 1.8rem;
}

.combo-offer p {
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.combo-price {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.combo-price .old-price {
    font-size: 1.5rem;
    text-decoration: line-through;
    color: #fca5a5;
}

.combo-price .new-price {
    font-size: 3rem;
    color: #16a34a;
    font-weight: 700;
}

.combo-price .discount {
    background: #dc2626;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 1rem;
    font-weight: 600;
    transform: rotate(-10deg);
}

/* Preview Pages Update */
.page-4 {
    transform: translateZ(-10px) translateX(30px);
    z-index: 0;
}

/* Responsive Updates */
@media (max-width: 768px) {
    .ebooks-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .ebook-item {
        padding: 2rem;
    }
    
    .ebook-price .price-value {
        font-size: 2rem;
    }
    
    .combo-price {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .combo-price .new-price {
        font-size: 2.5rem;
    }
    
    .combo-offer {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .ebook-item {
        padding: 1.5rem;
    }
    
    .ebook-item h3 {
        font-size: 1.1rem;
    }
    
    .ebook-description {
        font-size: 0.9rem;
    }
    
    .combo-offer h3 {
        font-size: 1.5rem;
    }
}