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

:root {
    /* Colors from book cover gradient */
    --primary-orange: #D4721A;
    --primary-teal: #1A9B8A;
    --dark-bg: #0A0E1A;
    --dark-secondary: #141414;
    --dark-card: #1C1C1C;
    --text-white: #FFFFFF;
    --text-gray: #B8B8B8;
    --text-light-gray: #888888;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-orange), var(--primary-teal));
    --gradient-orange: linear-gradient(135deg, #D4721A, #E89B4D);
    --gradient-teal: linear-gradient(135deg, #1A9B8A, #2DC5B0);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-white);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at 20% 50%, rgba(212, 114, 26, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 50%, rgba(26, 155, 138, 0.15) 0%, transparent 50%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    padding: 120px 0 80px;
}

.hero-text {
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: clamp(48px, 7vw, 96px);
    font-weight: 900;
    line-height: 0.9;
    margin-bottom: 24px;
    letter-spacing: -0.03em;
}

.hero-title-main {
    display: block;
    background: var(--gradient-orange);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title-secondary {
    display: block;
    background: var(--gradient-teal);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(18px, 2vw, 24px);
    color: var(--text-gray);
    margin-bottom: 32px;
    max-width: 540px;
    line-height: 1.5;
}

.hero-author {
    margin-bottom: 32px;
    font-size: 16px;
}

.hero-author strong {
    color: var(--primary-teal);
    font-weight: 600;
}

.author-credentials {
    color: var(--text-light-gray);
    font-size: 14px;
    margin-top: 4px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 36px;
    background: var(--gradient-primary);
    color: var(--text-white);
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    border-radius: 12px;
    transition: all 0.3s ease;
    box-shadow: 0 8px 24px rgba(212, 114, 26, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(212, 114, 26, 0.5);
}

.btn-primary i {
    transition: transform 0.3s ease;
}

.btn-primary:hover i {
    transform: translateX(4px);
}

.hero-price-badge {
    margin-top: 24px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: rgba(212, 114, 26, 0.1);
    border: 1px solid rgba(212, 114, 26, 0.3);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-gray);
}

.hero-price-badge i {
    color: var(--primary-teal);
}

.hero-price-badge strong {
    color: var(--text-white);
    font-size: 18px;
}

.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.book-cover {
    width: 100%;
    max-width: 450px;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.6);
    transition: transform 0.6s ease;
    animation: fadeIn 1.2s ease-out;
}

.book-cover:hover {
    transform: scale(1.05) rotateY(5deg);
}

.image-glow {
    position: absolute;
    width: 80%;
    height: 80%;
    background: var(--gradient-primary);
    filter: blur(100px);
    opacity: 0.3;
    z-index: -1;
    animation: pulse 3s ease-in-out infinite;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
    color: var(--text-gray);
    font-size: 24px;
    cursor: pointer;
}

/* Brand Section */
.brand-section {
    padding: 120px 0;
    background: var(--dark-secondary);
    text-align: center;
}

.brand-title {
    font-size: clamp(64px, 10vw, 140px);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 0.9;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.brand-subtitle {
    font-size: clamp(24px, 3vw, 36px);
    color: var(--text-gray);
    font-weight: 300;
}

/* Receive Section */
.receive-section {
    padding: 120px 0;
    background: var(--dark-bg);
}

.section-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 800;
    text-align: center;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--text-gray);
    margin-bottom: 64px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.receive-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 32px;
    margin-bottom: 80px;
}

.receive-card {
    background: var(--dark-card);
    padding: 40px 32px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.receive-card:hover {
    border-color: var(--primary-teal);
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(26, 155, 138, 0.2);
}

.receive-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
}

.receive-card h3 {
    font-size: 22px;
    margin-bottom: 16px;
    color: var(--text-white);
}

.receive-card p {
    color: var(--text-gray);
    font-size: 15px;
    line-height: 1.6;
}

.book-preview {
    margin-top: 80px;
}

.preview-title {
    font-size: 28px;
    text-align: center;
    margin-bottom: 40px;
    color: var(--text-white);
}

.preview-images-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
}

.preview-images-grid img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
    transition: all 0.4s ease;
    cursor: pointer;
    border: 2px solid transparent;
}

.preview-images-grid img:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 60px rgba(26, 155, 138, 0.4);
    border-color: var(--primary-teal);
}

/* Lightbox effect on click (optional enhancement) */
.preview-images-grid img:active {
    transform: scale(0.98);
}

/* About Book */
.about-book {
    padding: 120px 0;
    background: var(--dark-secondary);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.lead-text {
    font-size: 22px;
    line-height: 1.7;
    margin-bottom: 32px;
    color: var(--text-white);
}

.about-text p {
    font-size: 17px;
    color: var(--text-gray);
    margin-bottom: 24px;
    line-height: 1.8;
}

.about-text strong {
    color: var(--primary-teal);
    font-weight: 600;
}

.quote {
    margin: 48px 0;
    padding: 32px 40px;
    background: rgba(26, 155, 138, 0.1);
    border-left: 4px solid var(--primary-teal);
    border-radius: 8px;
}

.quote p {
    font-size: 19px;
    font-style: italic;
    color: var(--text-white);
    line-height: 1.7;
}

/* Methodology Section */
.methodology-section {
    padding: 120px 0;
    background: var(--dark-bg);
}

.methodology-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 32px;
    margin-top: 64px;
}

.methodology-card {
    background: var(--dark-card);
    padding: 40px 32px;
    border-radius: 16px;
    border-left: 4px solid var(--primary-orange);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.methodology-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(212, 114, 26, 0.3);
}

.method-number {
    font-size: 48px;
    font-weight: 900;
    color: var(--primary-teal);
    opacity: 0.2;
    position: absolute;
    top: 20px;
    right: 20px;
}

.methodology-card h3 {
    font-size: 24px;
    margin-bottom: 8px;
    color: var(--text-white);
}

.method-author {
    font-size: 14px;
    color: var(--primary-orange);
    font-weight: 600;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.methodology-card p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* Curriculum Section */
.curriculum-section {
    padding: 120px 0;
    background: var(--dark-secondary);
}

.curriculum-preview {
    max-width: 700px;
    margin: 64px auto;
    text-align: center;
}

.curriculum-image {
    width: 100%;
    border-radius: 16px;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(26, 155, 138, 0.2);
}

.chapters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    margin-top: 64px;
}

.chapter-card {
    background: var(--dark-card);
    padding: 24px 28px;
    border-radius: 12px;
    border-left: 4px solid var(--primary-orange);
    display: flex;
    align-items: flex-start;
    gap: 20px;
    transition: all 0.3s ease;
}

.chapter-card:hover {
    border-left-width: 8px;
    border-image: var(--gradient-primary) 1;
    transform: translateX(8px);
    box-shadow: 0 8px 32px rgba(26, 155, 138, 0.2);
}

.chapter-number {
    font-size: 24px;
    font-weight: 900;
    color: var(--primary-teal);
    min-width: 50px;
    text-align: center;
}

.chapter-content {
    flex: 1;
}

.chapter-content h4 {
    font-size: 16px;
    color: var(--text-white);
    margin-bottom: 6px;
    line-height: 1.4;
}

.chapter-page {
    font-size: 13px;
    color: var(--text-light-gray);
    font-weight: 500;
}

/* Author Section */
.author-section {
    padding: 120px 0;
    background: var(--dark-bg);
}

.author-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 64px;
    align-items: center;
    max-width: 1100px;
    margin: 64px auto 0;
}

.author-image-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
}

.author-photo {
    width: 100%;
    max-width: 320px;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
    border: 3px solid transparent;
    background: var(--gradient-primary);
    background-clip: padding-box;
    position: relative;
    transition: transform 0.4s ease;
}

.author-photo:hover {
    transform: scale(1.05);
}

.author-photo::before {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    background: var(--gradient-primary);
    border-radius: 16px;
    z-index: -1;
    filter: blur(20px);
    opacity: 0.6;
}

.author-name {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 8px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.author-title {
    font-size: 18px;
    color: var(--text-gray);
    margin-bottom: 32px;
}

.author-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--dark-card);
    border-radius: 12px;
    border-top: 3px solid var(--primary-teal);
}

.stat-number {
    font-size: 36px;
    font-weight: 900;
    color: var(--primary-orange);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-gray);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.author-bio {
    font-size: 16px;
    color: var(--text-gray);
    line-height: 1.8;
}

/* Sustainable Section */
.sustainable-section {
    padding: 100px 0;
    background: rgba(26, 155, 138, 0.05);
}

.sustainable-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.sustainable-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 32px;
    background: var(--gradient-teal);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
}

.sustainable-text {
    font-size: 17px;
    color: var(--text-gray);
    margin-bottom: 20px;
    line-height: 1.7;
}

.sustainable-highlight {
    font-size: 18px;
    color: var(--text-white);
    font-weight: 500;
    margin-top: 32px;
}

/* CTA Section */
.cta-section {
    padding: 120px 0;
    background: var(--dark-secondary);
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.cta-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 800;
    margin-bottom: 20px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta-subtitle {
    font-size: 19px;
    color: var(--text-gray);
    margin-bottom: 48px;
    line-height: 1.6;
}

.price-box {
    background: var(--dark-card);
    border: 2px solid var(--primary-teal);
    border-radius: 20px;
    padding: 48px 32px;
    margin-bottom: 40px;
}

.price-label {
    font-size: 14px;
    color: var(--text-gray);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}

.price-value {
    font-size: 64px;
    font-weight: 900;
    background: var(--gradient-orange);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.price-shipping {
    font-size: 18px;
    color: var(--text-white);
    margin-bottom: 16px;
}

.price-note {
    font-size: 14px;
    color: var(--text-light-gray);
    font-style: italic;
}

.btn-large {
    font-size: 18px;
    padding: 22px 48px;
    margin-bottom: 32px;
}

.payment-methods {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
    font-size: 14px;
    color: var(--text-gray);
}

.payment-methods span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.payment-methods i {
    color: var(--primary-teal);
}

/* FAQ Section */
.faq-section {
    padding: 120px 0;
    background: var(--dark-bg);
}

.faq-list {
    max-width: 900px;
    margin: 64px auto 0;
}

.faq-item {
    margin-bottom: 20px;
    background: var(--dark-card);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid transparent;
    transition: border-color 0.3s ease;
}

.faq-item.active {
    border-color: var(--primary-teal);
}

.faq-question {
    width: 100%;
    padding: 24px 28px;
    background: none;
    border: none;
    color: var(--text-white);
    font-size: 18px;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.faq-question:hover {
    color: var(--primary-teal);
}

.faq-question i {
    font-size: 16px;
    color: var(--primary-teal);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 28px 24px;
}

.faq-answer p {
    color: var(--text-gray);
    line-height: 1.7;
    font-size: 16px;
}

/* Footer */
.footer {
    padding: 64px 0 32px;
    background: var(--dark-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 48px;
    text-align: center;
}

.footer-brand h3 {
    font-size: 24px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.footer-brand p {
    color: var(--text-gray);
}

.footer-info p {
    color: var(--text-gray);
    font-size: 14px;
    margin-bottom: 8px;
}

.footer-btn {
    display: inline-block;
    padding: 14px 32px;
    background: var(--gradient-primary);
    color: var(--text-white);
    text-decoration: none;
    font-weight: 600;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.footer-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(212, 114, 26, 0.4);
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-light-gray);
    font-size: 14px;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes zoomIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(-10px);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.3;
    }
    50% {
        opacity: 0.5;
    }
}

/* Hotmart Button Customization */
.hotmart__button-checkout {
    /* Reset default Hotmart styles */
    background: var(--gradient-primary) !important;
    border: none !important;
    padding: 18px 36px !important;
    border-radius: 12px !important;
    font-weight: 600 !important;
    font-size: 16px !important;
    box-shadow: 0 8px 24px rgba(212, 114, 26, 0.3) !important;
    transition: all 0.3s ease !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 12px !important;
    text-decoration: none !important;
    cursor: pointer !important;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif !important;
}

.hotmart__button-checkout:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 12px 32px rgba(212, 114, 26, 0.5) !important;
}

.hotmart__button-checkout img {
    display: none !important;
}

.hotmart__button-checkout span {
    color: var(--text-white) !important;
}

.hotmart__button-checkout i {
    color: var(--text-white) !important;
    transition: transform 0.3s ease !important;
}

.hotmart__button-checkout:hover i {
    transform: translateX(4px) !important;
}

/* Hotmart Button Large Variant */
.btn-large.hotmart__button-checkout {
    font-size: 18px !important;
    padding: 22px 48px !important;
}

/* Footer Button Hotmart */
.footer-btn.hotmart__button-checkout {
    display: inline-block !important;
    padding: 14px 32px !important;
    background: var(--gradient-primary) !important;
    color: var(--text-white) !important;
    text-decoration: none !important;
    font-weight: 600 !important;
    border-radius: 8px !important;
    transition: all 0.3s ease !important;
}

.footer-btn.hotmart__button-checkout:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 8px 24px rgba(212, 114, 26, 0.4) !important;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .hero-image {
        order: -1;
    }
    
    .author-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .hero {
        min-height: auto;
    }
    
    .hero-content {
        padding: 80px 0 60px;
    }
    
    .brand-section {
        padding: 80px 0;
    }
    
    .receive-section,
    .about-book,
    .methodology-section,
    .curriculum-section,
    .author-section,
    .cta-section,
    .faq-section {
        padding: 80px 0;
    }
    
    .chapters-grid {
        grid-template-columns: 1fr;
    }
    
    .author-stats {
        grid-template-columns: 1fr;
    }
    
    .payment-methods {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    /* Preview images - 2 columns on tablet */
    .preview-images-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .hero-content {
        gap: 40px;
    }
    
    .hero-price-badge {
        flex-direction: column;
        text-align: center;
        gap: 6px;
    }
    
    .price-value {
        font-size: 48px;
    }
    
    .receive-grid {
        grid-template-columns: 1fr;
    }
    
    /* Preview images - 1 column on mobile */
    .preview-images-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .methodology-grid {
        grid-template-columns: 1fr;
    }
}