/* ============================================
   INFORMÁTICA PARA CONCURSOS - SALES PAGE
   Design: Clean Academic + Tech (Light Theme)
   ============================================ */

/* CSS Variables */
:root {
    /* Colors - Clean Light Theme */
    --primary: #FFFFFF;
    --primary-soft: #F8FAFC;
    --secondary: #F1F5F9;
    --surface: #FFFFFF;
    --surface-hover: #F8FAFC;

    /* Accent Colors */
    --accent-blue: #2563EB;
    --accent-blue-dark: #1D4ED8;
    --accent-green: #059669;
    --accent-green-light: #10B981;
    --accent-purple: #7C3AED;
    --accent-orange: #EA580C;
    --accent-red: #DC2626;

    /* Text Colors */
    --text-primary: #1E293B;
    --text-secondary: #475569;
    --text-muted: #94A3B8;

    /* Borders */
    --border-light: #E2E8F0;
    --border-medium: #CBD5E1;

    /* Gradients */
    --gradient-blue: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
    --gradient-green: linear-gradient(135deg, #059669 0%, #047857 100%);
    --gradient-hero: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);

    /* Typography */
    --font-display: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;

    /* Effects */
    --border-radius: 16px;
    --border-radius-sm: 8px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.06);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
}

/* Reset & Base */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
}

.highlight {
    color: var(--accent-blue);
}

.highlight-accent {
    color: var(--accent-blue);
}

/* Section Styles */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(37, 99, 235, 0.08);
    border: 1px solid rgba(37, 99, 235, 0.2);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-blue);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 16px auto 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-medium);
}

.btn-primary {
    background: var(--gradient-blue);
    color: white;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-medium);
}

.btn-secondary:hover {
    background: var(--secondary);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

.btn-cta {
    background: var(--gradient-blue);
    color: white;
    font-size: 1.125rem;
    padding: 18px 40px;
    box-shadow: 0 4px 14px rgba(5, 150, 105, 0.35);
}

.btn-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(5, 150, 105, 0.45);
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(220, 38, 38, 0.08);
    border: 1px solid rgba(220, 38, 38, 0.3);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-red);
    margin-bottom: 24px;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 80px 0;
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero-decoration {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.decoration-circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.5;
}

.circle-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
    top: -100px;
    right: -100px;
}

.circle-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(5, 150, 105, 0.06) 0%, transparent 70%);
    bottom: -50px;
    left: -50px;
}

.decoration-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(37, 99, 235, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text h1 {
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 540px;
}

.hero-subtitle strong {
    color: var(--text-primary);
}

/* Hero Stats */
.hero-stats {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-blue);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* E-book Mockup */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.ebook-mockup {
    position: relative;
    perspective: 1000px;
}

.ebook-shadow {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 250px;
    height: 30px;
    background: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.15) 0%, transparent 70%);
}

.ebook-cover {
    width: 300px;
    height: 420px;
    background: linear-gradient(145deg, #2563EB, #1D4ED8);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    transform: rotateY(-8deg) rotateX(3deg);
    transition: transform var(--transition-medium);
    overflow: hidden;
}

.ebook-cover:hover {
    transform: rotateY(-3deg) rotateX(1deg);
}

.cover-content {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    text-align: center;
    color: white;
}

.cover-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
}

.cover-header i {
    font-size: 2.5rem;
    opacity: 0.9;
}

.cover-header span {
    font-size: 0.75rem;
    letter-spacing: 3px;
    opacity: 0.7;
}

.cover-content h2 {
    font-size: 1.5rem;
    margin-bottom: 8px;
    color: white;
}

.cover-content p {
    font-size: 0.875rem;
    opacity: 0.8;
    margin-bottom: 24px;
}

.cover-badge {
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 700;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
}

.cover-author small {
    opacity: 0.7;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator i {
    font-size: 1.5rem;
    color: var(--text-muted);
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    40% {
        transform: translateX(-50%) translateY(-10px);
    }

    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ============================================
   BENEFITS SECTION
   ============================================ */
.benefits {
    padding: var(--section-padding);
    background: var(--primary);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.benefit-card {
    background: var(--surface);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    padding: 32px;
    transition: all var(--transition-medium);
}

.benefit-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-md);
}

.benefit-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(37, 99, 235, 0.08);
    border-radius: 12px;
    margin-bottom: 20px;
}

.benefit-icon i {
    font-size: 1.5rem;
    color: var(--accent-blue);
}

.benefit-icon.warning {
    background: rgba(234, 88, 12, 0.08);
}

.benefit-icon.warning i {
    color: var(--accent-orange);
}

.benefit-icon.keyboard {
    background: rgba(124, 58, 237, 0.08);
}

.benefit-icon.keyboard i {
    color: var(--accent-purple);
}

.benefit-icon.target {
    background: rgba(5, 150, 105, 0.08);
}

.benefit-icon.target i {
    color: var(--accent-blue);
}

.benefit-icon.book {
    background: rgba(37, 99, 235, 0.08);
}

.benefit-icon.exam {
    background: rgba(220, 38, 38, 0.08);
}

.benefit-icon.exam i {
    color: var(--accent-red);
}

.benefit-card h3 {
    margin-bottom: 12px;
    font-size: 1.125rem;
}

.benefit-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* ============================================
   CHAPTERS SECTION
   ============================================ */
.content-chapters {
    padding: var(--section-padding);
    background: var(--primary-soft);
}

.chapters-wrapper {
    display: grid;
    flex-direction: column;
    gap: 16px;
    grid-template-columns: repeat(3, 1fr);

}

.chapter-card {
    display: grid;
    align-items: flex-start;
    gap: 10px;
    background: var(--surface);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    padding: 24px 32px;
    transition: all var(--transition-medium);
}

.chapter-card:hover {
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-sm);
}

.chapter-card.featured {
    border-color: var(--accent-blue);
    background: linear-gradient(135deg, rgba(5, 150, 105, 0.03), transparent);
}

.chapter-card.featured:hover {
    box-shadow: 0 4px 12px rgba(5, 150, 105, 0.15);
}

.chapter-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-blue);
    min-width: 60px;
    opacity: 0.8;
}

.chapter-card.featured .chapter-number {
    color: var(--accent-blue);
}

.chapter-content h3 {
    margin-bottom: 8px;
}

.chapter-content p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: 12px;
    line-height: 1.7;
}

.chapter-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.chapter-tags span {
    padding: 4px 12px;
    background: var(--secondary);
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* ============================================
   FREE SAMPLE SECTION
   ============================================ */
.free-sample {
    padding: var(--section-padding);
    background: var(--primary);
}

.sample-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.sample-content h2 {
    margin-bottom: 16px;
}

.sample-content>p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.sample-features {
    list-style: none;
    margin-bottom: 32px;
}

.sample-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    color: var(--text-secondary);
}

.sample-features i {
    color: var(--accent-blue);
    font-size: 1.125rem;
}

.sample-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* PDF Preview Visual */
.sample-visual {
    display: flex;
    justify-content: center;
}

.pdf-preview {
    width: 280px;
    background: var(--surface);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
}

.pdf-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px;
    background: var(--secondary);
    border-bottom: 1px solid var(--border-light);
}

.pdf-header i {
    color: var(--accent-red);
    font-size: 1.25rem;
}

.pdf-header span {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.pdf-body {
    padding: 24px;
}

.pdf-page {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.pdf-line {
    height: 10px;
    background: var(--secondary);
    border-radius: 4px;
}

.pdf-line.short {
    width: 60%;
}

.pdf-line.medium {
    width: 80%;
}

/* ============================================
   AUTHOR SECTION
   ============================================ */
.author {
    padding: var(--section-padding);
    background: var(--primary-soft);
}

.author-wrapper {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 60px;
    align-items: center;
}

.author-image {
    position: relative;
}

.author-avatar {
    width: 170px;
    height: 170px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-blue);
    border-radius: 50%;
    box-shadow: 0 8px 30px rgba(37, 99, 235, 0.25);
    overflow: hidden;
    padding: 0;
    margin: 0 auto;
}

.author-avatar img {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    object-fit: cover;
    display: block;
    margin: 0 auto;
}

.author-badge {
    position: absolute;
    bottom: 5px;
    right: -10px;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--accent-blue-dark);
    border-radius: 50px;
    color: white;
    font-weight: 700;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
}

.author-content h2 {
    margin-bottom: 8px;
}

.author-title {
    color: var(--accent-blue);
    font-weight: 500;
    margin-bottom: 16px;
}

.author-bio {
    color: var(--text-secondary);
    margin-bottom: 24px;
    max-width: 600px;
    line-height: 1.8;
}

.author-credentials {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.credential {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--surface);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-light);
}

.credential i {
    color: var(--accent-blue);
}

.credential span {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ============================================
   CTA FINAL SECTION
   ============================================ */
.cta-final {
    padding: var(--section-padding);
    background: var(--primary);
    border-top: 1px solid var(--border-light);
}

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

.cta-content h2 {
    margin-bottom: 16px;
}

.cta-content>p {
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

.price-box {
    margin-bottom: 32px;
}

.price-tag {
    display: inline-flex;
    align-items: flex-start;
    color: var(--accent-blue);
    margin-bottom: 8px;
}

.currency {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 10px;
}

.price-value {
    font-family: var(--font-display);
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1;
}

.price-cents {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 10px;
}

.price-note {
    display: block;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.cta-wrapper .btn-cta {
    margin-bottom: 32px;
}

.trust-badges {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.trust-item i {
    color: var(--accent-blue);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: 60px 0 30px;
    background: var(--primary-soft);
    border-top: 1px solid var(--border-light);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-light);
    margin-bottom: 30px;
}

.footer-brand h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.footer-brand h3 i {
    color: var(--accent-blue);
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-blue);
}

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ============================================
   MODAL
   ============================================ */
.modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-medium);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 800px;
    background: var(--surface);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
    overflow: hidden;
    transform: translateY(20px);
    transition: transform var(--transition-medium);
    box-shadow: var(--shadow-lg);
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--secondary);
    border: 1px solid var(--border-light);
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    z-index: 10;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--accent-red);
    color: white;
    border-color: var(--accent-red);
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-light);
    background: var(--primary-soft);
}

.modal-header h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.125rem;
}

.modal-header i {
    color: var(--accent-red);
}

.modal-body {
    background: var(--secondary);
}

.modal-body iframe {
    border: none;
    display: block;
}

.modal-footer {
    padding: 20px 24px;
    display: flex;
    justify-content: center;
    border-top: 1px solid var(--border-light);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-subtitle {
        margin: 0 auto 32px;
    }
    .hero-stats {
        justify-content: center;
    }
    .hero-cta {
        justify-content: center;
    }
    .ebook-mockup {
        transform: none;
        width: 60%;
    }
    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .chapters-wrapper {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
    .sample-wrapper {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .sample-features {
        display: inline-block;
        text-align: left;
    }
    .sample-actions {
        justify-content: center;
    }
    .author-wrapper {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 32px;
    }
    .author-image {
        display: flex;
        justify-content: center;
        margin-bottom: 16px;
    }
    .author-avatar {
        width: 170px;
        height: 170px;
    }
    .author-image {
        margin-left: auto;
        margin-right: auto;
        display: flex;
        justify-content: center;
        align-items: center;
        width: min-content;
    }
    .author-avatar img {
        width: 160px;
        height: 160px;
    }
    .author-badge {
        bottom: 5px;
        padding: 8px 16px;
        font-size: 0.875rem;
    }
    .author-bio {
        margin: 0 auto 24px;
    }
    .author-credentials {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .ebook-mockup {
        transform: none;
        width: 70%;
    }
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    .chapters-wrapper {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .chapter-card {
        flex-direction: column;
        gap: 12px;
    }
    .chapter-number {
        font-size: 1.5rem;
    }
    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }
    .author-avatar {
        width: 80px;
        height: 80px;
    }
    .author-avatar img {
        width: 60px;
        height: 60px;
    }
    .author-avatar {
        width: 170px;
        height: 170px;
    }
    .author-image {
        margin-left: auto;
        margin-right: auto;
        display: flex;
        justify-content: center;
        align-items: center;
        width: min-content;
    }
    .author-avatar img {
        width: 160px;
        height: 160px;
    }
    .author-badge {
        bottom: 5px;
        padding: 8px 16px;
        font-size: 0.875rem;
    }
}

@media (max-width: 480px) {
    .ebook-mockup {
        width: 100%;
    }
    .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-cta {
        flex-direction: column;
    }

    .sample-actions {
        flex-direction: column;
    }

    .ebook-cover {
        width: 240px;
        height: 340px;
    }
}

/* MOBILE FIRST - OTIMIZAÇÃO BOOTSTRAP-LIKE */
@media (max-width: 480px) {
    .container {
        padding: 0 8px;
    }

    .section-header h2,
    .section-header p {
        font-size: 1.1rem;
    }

    .benefits-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .chapters-wrapper {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .chapter-card {
        padding: 16px 10px;
    }

    .chapter-number {
        font-size: 1.1rem;
        min-width: 36px;
    }

    .author-wrapper {
        gap: 16px;
    }

    .author-avatar {
        width: 48px;
        height: 48px;
    }

    .author-avatar img {
        width: 36px;
        height: 36px;
    }

    .author-badge {
        font-size: 0.7rem;
        padding: 4px 8px;
        right: -4px;
        bottom: 0;
    }

    .author-content h2 {
        font-size: 1.1rem;
    }

    .author-title,
    .author-bio {
        font-size: 0.95rem;
    }

    .author-credentials {
        gap: 8px;
    }

    .credential {
        padding: 6px 8px;
        font-size: 0.85rem;
    }

    .cta-wrapper {
        padding: 0 4px;
    }


    .footer-content {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
    }

    .footer-bottom p {
        font-size: 0.8rem;
    }

    .author-avatar {
        width: 170px;
        height: 170px;
    }

    .author-image {
        margin-left: auto;
        margin-right: auto;
        display: flex;
        justify-content: center;
        align-items: center;
        width: min-content;

    }

    .author-avatar img {
        width: 160px;
        height: 160px;
    }

    .author-badge {
        bottom: 5px;
        padding: 8px 16px;
        font-size: 0.875rem;
    }
    
    .trust-badges {
        align-items: center;
        flex-direction: column;
        gap: 16px;
    }
}