.cta-section .cta-buttons {
    display: flex;
    gap: 1rem;
    margin: 1.5rem auto;
    justify-content: center;
    flex-wrap: wrap;
}:root {
    --background-color: #FFFFFF;
    --text-color: #000000;
    --link-color: #0066CC;
    --border-color: #CCCCCC;
    --light-gray: #F7F7F7;
    --dark-gray: #444444;
}

/* Base styles */
body {
    font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, serif;
    color: var(--text-color);
    background-color: var(--background-color);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    font-size: 18px;
    text-align: center;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin-top: 1.5em;
    margin-bottom: 0.5em;
    line-height: 1.3;
    color: var(--dark-gray);
    text-align: center;
}

h1 {
    font-size: 2.2rem;
}

h2 {
    font-size: 1.8rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.3rem;
}

h3 {
    font-size: 1.5rem;
}

a {
    color: var(--link-color);
    text-decoration: underline;
    text-underline-offset: 0.2em;
}

a:hover {
    text-decoration-thickness: 2px;
}

p {
    margin: 1.2em auto;
    max-width: 800px;
    text-align: center;
}

blockquote {
    border-left: 4px solid var(--border-color);
    margin-left: 0;
    padding-left: 1rem;
    color: var(--dark-gray);
    font-style: italic;
}

code {
    font-family: "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
    background-color: var(--light-gray);
    padding: 0.2em 0.4em;
    border-radius: 3px;
    font-size: 0.9em;
}

pre {
    background-color: var(--light-gray);
    padding: 1rem;
    overflow-x: auto;
    border-radius: 4px;
}

pre code {
    background-color: transparent;
    padding: 0;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    display: block;
}

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

header {
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    margin-bottom: 2rem;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-title {
    font-size: 1.2rem;
    font-weight: bold;
    margin: 0;
    font-family: 'Montserrat', Arial, sans-serif;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: -1px;
    color: var(--dark-gray);
    text-decoration: none;
}

.site-title:hover {
    color: var(--link-color);
}

.site-title .os-light {
    font-family: 'Montserrat', Arial, sans-serif;
    font-weight: 300;
    letter-spacing: -0.5px;
    text-transform: none;
}

nav ul {
    display: flex;
    list-style-type: none;
    padding: 0;
    margin: 0;
}

nav li {
    margin-left: 1.5rem;
}

nav a {
    color: var(--dark-gray);
    text-decoration: none;
    font-weight: 500;
}

nav a:hover {
    color: var(--link-color);
}

main {
    min-height: 70vh;
}

footer {
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 3rem;
    background-color: var(--light-gray);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

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

.footer-nav ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    list-style-type: none;
    padding: 0;
}

.copyright {
    color: var(--dark-gray);
    font-size: 0.9rem;
    margin-top: 1rem;
}

/* Buttons */
.cta-button {
    display: inline-block;
    background-color: var(--link-color);
    color: white;
    font-weight: bold;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border-radius: 4px;
    margin: 1.5rem 0;
    transition: background-color 0.2s ease;
    border: none;
    font-size: 1rem;
    cursor: pointer;
}

.cta-button:hover {
    background-color: #005bb8;
}

/* General Forms */
.form-group {
    margin-bottom: 1rem;
}

input, textarea, select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: inherit;
}

button {
    background-color: var(--link-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-weight: bold;
    cursor: pointer;
    font-size: 1rem;
}

button:hover {
    background-color: #005bb8;
}

/* Center lists in main content */
main ul,
main ol {
    list-style-position: inside;
    text-align: center;
    padding-left: 0;
}

/* Ensure list items are centered */
main li {
    text-align: center;
}

/* For nested lists, maintain center alignment */
main ul ul,
main ol ol,
main ul ol,
main ol ul {
    padding-left: 2rem;
    list-style-position: inside;
}

/* Hide honeypot field */
.hidden {
    display: none !important;
}

/* Contact form styles */
.contact-form {
    max-width: 600px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.contact-form .form-group {
    margin-bottom: 1.5rem;
}

.contact-form label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark-gray);
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

.contact-form input[type="text"]:focus,
.contact-form input[type="email"]:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--link-color);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form button[type="submit"] {
    background-color: var(--link-color);
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 4px;
    font-weight: bold;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.2s ease;
}

.contact-form button[type="submit"]:hover {
    background-color: #005bb8;
}

/* Specific styles for pages type content */
.pages-content ul,
.pages-content ol {
    list-style-position: inside;
    text-align: center;
    padding-left: 0;
    margin: 1rem auto;
    max-width: 800px;
}

.pages-content li {
    text-align: center;
    margin-bottom: 0.5rem;
}

/* Newsletter form */
.newsletter-form {
    display: flex;
    max-width: 400px;
    margin: 1.5rem auto;
}

.newsletter-form input {
    flex-grow: 1;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
    border-right: none;
}

.newsletter-form button {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

/* Homepage */
.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 3rem 0;
    gap: 2rem;
}

.book-cover {
    width: 100%;
    max-width: 300px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.book-description {
    text-align: center;
}

.book-description h1 {
    margin-top: 0;
}

.section-heading {
    text-align: center;
    margin: 3rem 0 1.5rem;
}

.latest-posts {
    margin: 3rem 0;
}

.latest-posts ul {
    list-style-type: none;
    padding: 0;
}

.latest-posts li {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.latest-posts li:last-child {
    border-bottom: none;
}

.post-date {
    color: var(--dark-gray);
    margin-right: 0.5rem;
    font-size: 0.9rem;
}

.post-title {
    font-size: 1.3rem;
    margin: 0.3rem 0;
}

/* Footer links */
.footer-links {
    margin: 1.5rem 0;
}

.footer-links ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
    list-style-type: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin: 0;
}

.footer-links a {
    color: var(--dark-gray);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--link-color);
    text-decoration: underline;
}

/* Blog */
.post-header {
    margin-bottom: 2rem;
}

.post-meta {
    color: var(--dark-gray);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.post-content {
    margin-bottom: 2rem;
}

.post-footer {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.social-share {
    margin-bottom: 2rem;
}

.social-share a {
    display: inline-block;
    margin-right: 1rem;
}

.amazon-cta {
    background-color: var(--light-gray);
    padding: 1.5rem;
    border-radius: 4px;
    text-align: center;
}

/* Media pages */
.video-container, .podcast-container {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.video-container:last-child, .podcast-container:last-child {
    border-bottom: none;
}

/* Responsive */
@media (max-width: 768px) {
    body {
        font-size: 16px;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    h3 {
        font-size: 1.3rem;
    }
    
    header .container {
        flex-direction: column;
        align-items: flex-start;
    }
    
    nav {
        margin-top: 1rem;
        width: 100%;
    }
    
    nav ul {
        flex-direction: column;
    }
    
    nav li {
        margin-left: 0;
        margin-bottom: 0.5rem;
    }
    
    .footer-links ul {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .footer-links a {
        font-size: 0.85rem;
    }
    .newsletter-form {
        flex-direction: column;
    }
    
    .newsletter-form input {
        border-right: 1px solid var(--border-color);
        border-bottom: none;
        border-radius: 4px 4px 0 0;
    }
    
    .newsletter-form button {
        border-radius: 0 0 4px 4px;
    }
}

@media (min-width: 768px) {
    .hero {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
        text-align: left;
    }
    
    .book-description {
        text-align: left;
    }
}

/* Add styles for section content */
.section-content {
    margin-bottom: 2rem;
    line-height: 1.6;
}

.section-content h1, 
.section-content h2, 
.section-content h3, 
.section-content h4, 
.section-content h5, 
.section-content h6 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

.section-content p {
    margin-bottom: 1rem;
}

.section-content ul, 
.section-content ol {
    margin: 0 auto 1rem;
    max-width: 800px;
    text-align: left;
    padding-left: 2rem;
}

.section-content blockquote {
    border-left: 4px solid #ccc;
    padding-left: 1rem;
    margin-left: 0;
    margin-right: 0;
    font-style: italic;
}

.section-content .cta-section {
    margin: 2rem 0;
    text-align: center;
}

.section-content .cta-section a.primary-cta {
    display: inline-block;
    background-color: #0066CC;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: bold;
}

.section-content .cta-section a.primary-cta:hover {
    background-color: #0055AA;
}

/* Homepage section styles */
.hero-section {
    text-align: center;
    padding: 2rem 0;
    margin-bottom: 3rem;
    border-bottom: 1px solid var(--border-color);
}

.hero-section h1 {
    margin-top: 0;
    font-size: 2.5rem;
}

.hero-section h2 {
    border-bottom: none;
    font-size: 1.8rem;
}

.about-section {
    margin: 4rem 0;
    line-height: 1.6;
}

.about-section h2 {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin-top: 3rem;
    margin-bottom: 1.5rem;
}

.about-section h3 {
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--dark-gray);
}

.about-section h4 {
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--dark-gray);
}

.about-section ul,
.about-section ol {
    margin: 0 auto 1.5rem;
    max-width: 800px;
    text-align: left;
    padding-left: 2rem;
    display: inline-block;
}

.about-section blockquote {
    font-style: italic;
    margin: 1.5rem 0;
    padding-left: 1rem;
    border-left: 4px solid var(--border-color);
}

.cta-section {
    background-color: #f7f7f7;
    padding: 3rem;
    border-radius: 8px;
    margin: 4rem auto;
    text-align: center;
    max-width: 1035px;
}

.cta-section h2 {
    margin-top: 0;
    border-bottom: none;
}

.cta-section .emphasis {
    font-size: 1.3rem;
    margin: 1.5rem 0;
}

.contact-section {
    margin: 0;
    padding: 3rem 0;
    background-color: #333;
    color: white;
    text-align: center;
    width: 100%;
    border-top: none;
}

.contact-section h3 {
    color: white;
    margin-bottom: 1.5rem;
}

.contact-section a {
    color: #667eea;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease;
}

.contact-section a:hover {
    color: #8b99ff;
    text-decoration: underline;
}

.contact-section h3 {
    margin-top: 0;
}

/* Fix for missing author section styling */
.author-container {
    margin: 3rem 0;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.author-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2.5rem;
    align-items: flex-start;
}

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

.author-image img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
}

.author-content h3 {
    margin-top: 0;
    color: #333;
    font-size: 1.8rem;
}

.author-content h4 {
    margin-top: 1.5rem;
    font-size: 1.4rem;
    color: #444;
}

.author-content ul {
    padding-left: 1.2rem;
    margin: 0 auto 1.5rem;
    text-align: left;
    display: inline-block;
}

.author-content li {
    margin-bottom: 0.5rem;
}

/* Responsive layout for author section */
@media (max-width: 768px) {
    .author-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .author-image {
        margin: 0 auto;
        max-width: 250px;
    }
    
    .author-content {
        text-align: center;
    }
    
    .author-content ul {
        display: inline-block;
        text-align: left;
    }
}

/* Book Structure Section */
.book-structure {
    margin: 4rem 0;
    padding: 0 1rem;
}

.structure-content {
    max-width: 1035px;
    margin: 0 auto;
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

.structure-content h3 {
    text-align: center;
    margin-top: 0;
    margin-bottom: 1.5rem;
    color: #333;
    font-size: 1.8rem;
}

.stages-container {
    margin: 2rem 0;
    padding: 1.5rem;
    background: var(--light-gray);
    border-radius: 8px;
}

.stages-container h4 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    text-align: center;
    font-size: 1.4rem;
}

.stage-item {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.stage-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.stage-item h5 {
    color: var(--link-color);
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.stage-item p {
    margin: 0;
}

/* Responsive adjustments for book structure */
@media (max-width: 768px) {
    .structure-content {
        padding: 1.5rem;
    }
    
    .stages-container {
        padding: 1rem;
    }
}

/* Book cover and Amazon buttons styles */
.book-cover-container {
    text-align: center;
    margin: 0 auto 3rem;
    max-width: 400px;
}

.book-cover-image {
    max-width: 100%;
    height: auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    border-radius: 5px;
}

.amazon-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

.amazon-button {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    font-weight: bold;
    border-radius: 4px;
    font-size: 1.1rem;
    transition: all 0.2s ease;
    color: white;
}

.amazon-button.kindle {
    background-color: #FF9900;
}

.amazon-button.paperback {
    background-color: #146EB4;
}

.amazon-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

@media (max-width: 768px) {
    .book-cover-container {
        max-width: 250px;
        margin-bottom: 2rem;
    }
    
    .amazon-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .amazon-button {
        width: 100%;
        text-align: center;
    }
}

/* Two-column layout for hero section */
.two-column {
    display: flex;
    align-items: center;
    gap: 3rem;
    margin: 2rem 0;
}

.left-column {
    flex: 1;
    display: flex;
    justify-content: center;
}

.right-column {
    flex: 1.5;
}

.hero-section {
    margin-bottom: 4rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--border-color);
}

.hero-section h1 {
    margin-top: 0;
    font-size: 2.2rem;
    line-height: 1.2;
}

.hero-section h2 {
    border-bottom: none;
    font-size: 1.6rem;
    margin-top: 1rem;
    color: var(--dark-gray);
    font-weight: 500;
}

.hero-section .amazon-buttons {
    margin-top: 2rem;
    justify-content: flex-start;
}

/* Responsive adjustments for two-column layout */
@media (max-width: 768px) {
    .two-column {
        flex-direction: column;
        gap: 2rem;
    }
    
    .left-column, .right-column {
        flex: 1;
        width: 100%;
    }
    
    .hero-section h1 {
        font-size: 1.8rem;
        text-align: center;
    }
    
    .hero-section h2 {
        font-size: 1.4rem;
        text-align: center;
    }
    
    .hero-section p {
        text-align: center;
    }
    
    .hero-section .amazon-buttons {
        justify-content: center;
    }
}

/* Hero Section with colored background */
.hero-container {
    margin: 0;
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem 0;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    min-height: 80vh;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(280px, 1fr) 2fr;
    gap: 3rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    justify-items: center;
}

.hero-image {
    width: 100%;
    position: relative;
    display: flex;
    justify-content: center;
}

.hero-image img {
    width: 100%;
    max-width: 350px;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    margin: 0 auto;
    display: block;
}

.credibility-badges {
    position: absolute;
    left: 0;
    bottom: 40px;
    width: 100%;
    text-align: center;
}

.badge {
    display: inline-block;
    background-color: #FF9900;
    color: white;
    padding: 6px 12px;
    margin-bottom: 8px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: bold;
    box-shadow: 0 3px 6px rgba(0,0,0,0.2);
}

.hero-content {
    padding: 1rem 0;
    text-align: center;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.hero-content h1 {
    font-size: 3.8rem;
    margin: 0;
    line-height: 0.9;
    color: #000000;
    text-align: center;
    font-family: 'Montserrat', Arial, sans-serif;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: -2px;
    text-shadow: none;
}

.hero-content h1 .os-light {
    font-family: 'Montserrat', Arial, sans-serif;
    font-weight: 300;
    letter-spacing: -1px;
    text-transform: none;
}

.hero-content h3 {
    font-size: 1.8rem;
    margin: 0.5rem 0 1.5rem;
    color: rgba(255,255,255,0.95);
    font-weight: 600;
    letter-spacing: 3px;
    text-align: center;
    text-transform: uppercase;
    font-family: 'Montserrat', Arial, sans-serif;
    width: 100%;
    display: block;
    white-space: nowrap;
}

.hero-tagline {
    font-size: 2.6rem;
    color: #FF9900;
    margin: 5 0 1rem;
    font-weight: bold;
    line-height: 1.3;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    text-align: center;
    font-family: 'Montserrat', Arial, sans-serif;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.95);
    margin-bottom: 1rem;
    font-weight: 500;
}

.unique-promise {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    background: rgba(0,0,0,0.15);
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid #FF9900;
    text-align: center;
    font-family: 'Montserrat', Arial, sans-serif;
}

.science-tagline {
    font-size: 1.05rem;
    color: rgba(255,255,255,0.85);
    font-style: italic;
    margin-bottom: 1.5rem;
    text-align: center;
}

.emphasis {
    font-weight: bold;
    font-size: 1.5rem;
    margin: 1.5rem 0;
    color: white;
    background: rgba(255, 153, 0, 0.2);
    padding: 0.8rem;
    border-radius: 8px;
    border: 2px solid #FF9900;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
    text-align: center;
    font-family: 'Montserrat', Arial, sans-serif;
}

.video-intro {
    margin: 1.5rem 0;
    display: flex;
    align-items: center;
    gap: 1rem;
    justify-content: center;
}

.video-thumb {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid white;
}

.play-button {
    background-color: white;
    color: #4C5AE3;
    border: none;
    padding: 10px 16px;
    border-radius: 50px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.play-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.2);
    background-color: #f0f0f0;
}

.hero-buttons, .cta-buttons {
    display: flex;
    gap: 1rem;
    margin: 1.5rem 0;
    vertical-align: middle;
    flex-wrap: wrap;
    justify-content: center;
}

.warning-container {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    margin-top: 2rem;
}

.warning-container .emphasis {
    margin: 0;
    max-width: 80%;
}

.amazon-kindle, .amazon-paper {
    display: inline-block;
    padding: 0.85rem 1.8rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    color: white;
    transition: all 0.3s ease;
    text-align: center;
    min-width: 180px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 1.1rem;
}

.amazon-kindle {
    background-color: #FF9900;
    box-shadow: 0 4px 15px rgba(255,153,0,0.3);
    border: 2px solid rgba(255,255,255,0.2);
}

.amazon-paper {
    background-color: white;
    color: #667eea;
    box-shadow: 0 4px 15px rgba(255,255,255,0.3);
    border: 2px solid rgba(255,255,255,0.1);
}

.amazon-kindle:hover, .amazon-paper:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.2);
}

@media (max-width: 768px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero-image {
        max-width: 280px;
        margin: 0 auto;
    }
    
    .hero-content {
        text-align: center;
        height: auto;
    }
    
    .hero-content h1 {
        font-size: 2.8rem;
        letter-spacing: -1px;
    }
    
    .hero-content h3 {
        font-size: 1.5rem;
        letter-spacing: 2.5px;
    }
    
    .hero-tagline {
        font-size: 1.3rem;
        line-height: 1.3;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .unique-promise {
        font-size: 1rem;
        padding: 0.8rem;
        text-align: left;
    }
    
    .science-tagline {
        font-size: 0.95rem;
    }
    
    .emphasis {
        font-size: 1.2rem;
        padding: 0.7rem;
    }
    
    .video-intro {
        justify-content: center;
    }
    
    .hero-buttons, .cta-buttons {
        justify-content: center;
    }
    
    .amazon-kindle, .amazon-paper {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .warning-container {
        margin-top: 1.5rem;
    }
    
    .warning-container .emphasis {
        max-width: 100%;
    }
}

/* Section backgrounds for visual segmentation */
.section-white {
    background-color: white;
    padding: 4rem 0;
}

.section-light {
    background-color: #f8f9fa;
    padding: 4rem 0;
}

.section-accent {
    background-color: #f0f4ff;
    padding: 4rem 0;
}

.section-dark {
    background-color: #333;
    color: white;
    padding: 4rem 0;
}

/* Scientific Foundation section with light blue background */
.science-section {
    background-color: #f0f4ff;
    padding: 4rem 0;
    margin: 0;
    width: 100%;
    overflow: visible;
}

.science-section h2 {
    text-align: center;
    margin-bottom: 2.5rem;
}

/* Scholars Foundation Section */
.scholars-foundation {
    margin: 3rem 0;
    padding: 2rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.scholars-foundation h3 {
    text-align: center;
    color: #333;
    margin-bottom: 1rem;
    font-size: 2rem;
}

.scholars-foundation > p {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.1rem;
    color: #666;
}

.featured-scholars {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

.scholar-card {
    text-align: center;
    padding: 1.5rem;
    background: #f8f9fa;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

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

.scholar-card img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1rem;
    border: 3px solid #667eea;
}

.scholar-card h4 {
    color: #333;
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.scholar-card p {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.4;
    margin: 0;
}

.additional-scholars {
    border-top: 2px solid #eee;
    padding-top: 2rem;
}

.additional-scholars h4 {
    text-align: center;
    color: #333;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

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

.scholar-list ul {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.scholar-list li {
    padding: 0.4rem 0.6rem;
    background: #f8f9fa;
    border-radius: 6px;
    font-size: 0.9rem;
    color: #555;
    border-left: 3px solid #667eea;
}

.scholar-note {
    text-align: center;
    margin-top: 1.5rem;
    font-style: italic;
    color: #666;
    font-size: 1rem;
}

.image-credits {
    text-align: center;
    margin-top: 2rem;
    font-size: 0.85rem;
    color: #888;
    padding-top: 1.5rem;
    border-top: 1px solid #eee;
}

@media (max-width: 768px) {
    .featured-scholars {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .scholar-card img {
        width: 120px;
        height: 120px;
    }
    
    .scholar-list ul {
        grid-template-columns: 1fr;
    }
}

/* CTA Section with color gradient */
.cta-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 4rem 2rem;
    border-radius: 0;
    margin: 0;
    text-align: center;
    color: white;
    width: 100%;
}

.cta-section .cta-buttons {
    display: flex;
    gap: 1rem;
    margin: 1.5rem auto;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-section h2 {
    margin-top: 0;
    border-bottom: none;
    color: white;
    font-size: 2.2rem;
}

.cta-section p {
    color: rgba(255,255,255,0.9);
    font-size: 1.2rem;
    max-width: 800px;
    margin: 1rem auto;
}

.cta-section .emphasis {
    font-size: 1.5rem;
    margin: 1.5rem auto;
    text-align: center;
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2.2rem;
        letter-spacing: -0.5px;
    }
    
    .hero-content h3 {
        font-size: 1.1rem;
        letter-spacing: 2px;
        white-space: normal;
    }
    
    .hero-tagline {
        font-size: 1.1rem;
    }
    
    .hero-subtitle {
        font-size: 0.9rem;
    }
    
    .unique-promise {
        font-size: 0.9rem;
        padding: 0.7rem;
    }
    
    .science-tagline {
        font-size: 0.85rem;
    }
    
    .emphasis {
        font-size: 1rem;
        padding: 0.6rem;
    }
    
    .badge {
        font-size: 0.8rem;
        padding: 5px 10px;
    }
    
    .play-button {
        font-size: 0.9rem;
        padding: 8px 14px;
    }
}

/* Discovery Section */
.discovery-section {
    background-color: #f8f9fa;
    padding: 4rem 0;
    margin: 0;
    width: 100%;
}

.discovery-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #333;
}

.discovery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.problem-box, .root-cause-box, .solution-box {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.discovery-grid h3 {
    color: #667eea;
    margin-bottom: 20px;
    font-size: 1.5rem;
    text-align: left;
}

.discovery-grid ul,
.discovery-grid ol {
    text-align: left;
    padding-left: 1.5rem;
    margin: 0;
}

.section-white ul {
    list-style-type: disc;
    margin: 1rem auto;
    max-width: 800px;
    text-align: left;
    padding-left: 1.5rem;
}

.section-white ol {
    list-style-type: decimal;
    margin: 1rem auto;
    max-width: 800px;
    text-align: left;
    padding-left: 1.5rem;
}

.evolution-visual {
    display: flex;
    align-items: center;
    justify-content: space-around;
    margin: 30px 0;
    font-size: 0.9rem;
    text-align: center;
}

.evo-item {
    padding: 15px;
    background: #e3f2fd;
    border-radius: 8px;
    white-space: pre-line;
}

.evo-item.disruption {
    background: #ffebee;
    border: 2px solid #f44336;
    font-weight: bold;
}

.arrow {
    font-size: 2rem;
    color: #999;
}

/* Three Corrections Section */
.corrections-section {
    background-color: white;
    padding: 4rem 0;
    margin: 0;
    width: 100%;
}

.corrections-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: #333;
}

.section-intro {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 50px;
    color: #666;
    max-width: 800px;
    margin: 0 auto 50px;
}

.corrections-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.correction-card {
    background: white;
    border: 2px solid #ddd;
    border-radius: 12px;
    padding: 30px;
    position: relative;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.correction-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border-color: #667eea;
}

.correction-number {
    position: absolute;
    top: -20px;
    left: 30px;
    background: #667eea;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
}

.correction-card h3 {
    color: #667eea;
    margin-bottom: 10px;
    margin-top: 10px;
    text-align: left;
}

.correction-card h4 {
    color: #666;
    font-weight: normal;
    margin-bottom: 20px;
    font-size: 1rem;
    text-align: left;
}

.correction-card ul {
    text-align: left;
    margin: 0;
    padding-left: 1.5rem;
}

.correction-impact {
    margin: 20px 0;
    padding: 15px;
    background: #f0f4ff;
    border-radius: 8px;
    font-size: 0.9rem;
    text-align: left;
}

.learn-more {
    background: none;
    border: 2px solid #667eea;
    color: #667eea;
    padding: 8px 20px;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: bold;
    display: inline-block;
    margin-top: 10px;
}

.learn-more:hover {
    background: #667eea;
    color: white;
}

/* Implementation Timeline */
.implementation-section {
    background-color: #f8f9fa;
    padding: 4rem 0;
    margin: 0;
    width: 100%;
}

.implementation-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: #333;
}

.timeline-roadmap {
    display: flex;
    justify-content: space-between;
    margin: 50px auto;
    position: relative;
    max-width: 1200px;
}

.timeline-roadmap::before {
    content: '';
    position: absolute;
    top: 50px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: #ddd;
    z-index: 0;
}

.phase {
    flex: 1;
    padding: 20px;
    background: white;
    border: 2px solid #ddd;
    border-radius: 12px;
    position: relative;
    z-index: 1;
    margin: 0 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.phase:hover {
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transform: translateY(-3px);
}

.phase-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 2px solid #eee;
}

.phase-number {
    background: #667eea;
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: bold;
}

.phase-years {
    color: #666;
}

.phase h3 {
    color: #333;
    margin-bottom: 15px;
    text-align: left;
}

.phase ul {
    text-align: left;
    padding-left: 1.5rem;
    margin: 0;
}

.phase-outcome {
    margin-top: 20px;
    padding: 15px;
    background: #e8f5e9;
    border-radius: 8px;
    font-size: 0.9rem;
    text-align: left;
}

.urgency-message {
    text-align: center;
    margin-top: 50px;
    max-width: 800px;
    margin: 50px auto 0;
}

.urgency-message p {
    font-size: 1.2rem;
    margin: 10px auto;
}

/* Responsive adjustments */
@media (max-width: 968px) {
    .discovery-grid,
    .corrections-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline-roadmap {
        flex-direction: column;
    }
    
    .timeline-roadmap::before {
        display: none;
    }
    
    .phase {
        margin: 10px 0;
    }
}

/* FAQ section */
.faq-section {
    background-color: #f8f9fa;
    padding: 4rem 0;
    margin: 0;
    width: 100%;
}

.faq-section h3 {
    text-align: center;
    margin-bottom: 2rem;
    color: #333;
}

.faq-container {
    max-width: 920px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: white;
}

.faq-item summary {
    padding: 1rem;
    cursor: pointer;
    position: relative;
    font-weight: bold;
    list-style: none;
    outline: none;
    color: #333;
    background: white;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: #666;
}

.faq-item[open] summary::after {
    content: '−';
}

.faq-content {
    padding: 0 1rem 1rem;
    color: #444;
}

.faq-content p {
    margin: 0;
    color: #444;
}

/* Timeline tooltips only show on hover */
.eea-tooltip, .post-eea-tooltip {
    display: none;
    position: absolute;
    background: rgba(30, 30, 30, 0.95);
    color: white;
    padding: 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    line-height: 1.5;
    box-shadow: 0 4px 12px rgba(0,0,0,0.25);
    font-weight: normal;
    width: 280px;
    z-index: 999;
}

.eea-tooltip {
    bottom: calc(100% + 10px);
    left: 0;
    top: auto;
}

.eea-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 20px;
    border-width: 10px;
    border-style: solid;
    border-color: rgba(30, 30, 30, 0.95) transparent transparent transparent;
}

.eea-label:hover .eea-tooltip {
    display: block;
}

.post-eea-tooltip {
    top: calc(100% + 10px);
    right: 0;
    bottom: auto;
    left: auto;
}

.post-eea-tooltip::before {
    content: '';
    position: absolute;
    bottom: 100%;
    right: 20px;
    border-width: 10px;
    border-style: solid;
    border-color: transparent transparent rgba(30, 30, 30, 0.95) transparent;
}

.post-eea-label:hover .post-eea-tooltip {
    display: block;
}

.eea-label {
    width: auto;
    max-width: 300px;
}

.post-eea-label {
    width: auto;
    max-width: 300px;
}

@media (max-width: 768px) {
    .eea-tooltip, .post-eea-tooltip {
        font-size: 0.85rem;
        padding: 0.75rem;
    }
    
    .eea-label, .post-eea-label {
        width: 90%;
        max-width: none;
    }
    
    .cascade-tooltip {
        font-size: 0.85rem;
        padding: 0.75rem;
    }
}

/* Timeline Section with white framing */
.timeline-section {
    margin: 3rem 0;
    padding: 2rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    overflow: visible;
}

.timeline-section h3 {
    text-align: center;
    color: #333;
    margin-bottom: 1rem;
    font-size: 2rem;
}

.timeline-section > p {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.1rem;
    color: #666;
    max-width: 800px;
    margin: 0 auto 2rem;
}

/* Timeline container (already styled, just adjusting) */
.timeline-container {
    max-width: 1035px;
    margin: 0 auto;
    padding: 2rem 1rem;
    background: white;
    border-radius: 12px;
    position: relative;
    box-shadow: none; /* Remove existing shadow since parent has it */
    overflow: visible;
}

.eea-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 55%;
    background: linear-gradient(to bottom, 
        rgba(200, 250, 200, 0.3), 
        rgba(180, 240, 200, 0.3));
    border-radius: 12px 12px 0 0;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.eea-label {
    position: absolute;
    top: 15px;
    left: 15px;
    background: rgba(73, 160, 120, 0.9);
    color: white;
    padding: 10px 15px;
    border-radius: 6px;
    font-weight: bold;
    font-size: 1rem;
    z-index: 100;
    cursor: help;
    box-shadow: 0 3px 10px rgba(0,0,0,0.15);
    transition: all 0.3s ease;
}

.eea-label:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    z-index: 1000;
}

.disruption-marker {
    position: absolute;
    top: 55%;
    left: 0;
    width: 100%;
    height: 8px;
    background: repeating-linear-gradient(
        45deg,
        rgba(255, 90, 70, 0.8),
        rgba(255, 90, 70, 0.8) 12px,
        rgba(255, 153, 0, 0.8) 12px,
        rgba(255, 153, 0, 0.8) 24px
    );
    z-index: 3;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

/* Light red background for lower section */
.timeline-container::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 45%;
    background: linear-gradient(to bottom, 
        rgba(255, 230, 230, 0.3), 
        rgba(255, 210, 210, 0.3));
    pointer-events: none;
    z-index: 1;
    border-radius: 0 0 12px 12px;
}

.post-eea-label {
    position: absolute;
    right: 15px;
    bottom: 15px;
    background: rgba(255, 90, 70, 0.9);
    color: white;
    padding: 10px 15px;
    border-radius: 6px;
    font-weight: bold;
    font-size: 1rem;
    z-index: 100;
    max-width: 220px;
    text-align: center;
    box-shadow: 0 3px 10px rgba(0,0,0,0.15);
    transition: all 0.3s ease;
    cursor: help;
}

.post-eea-label:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    z-index: 1000;
}

.timeline-wrapper {
    position: relative;
    padding: 2rem 0;
    z-index: 2;
}

.timeline-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    width: 6px;
    height: 100%;
    background: linear-gradient(to bottom, 
        rgba(100, 100, 100, 0.6),
        rgba(130, 130, 130, 0.8),
        rgba(100, 100, 100, 0.6));
    transform: translateX(-50%);
    z-index: 2;
    border-radius: 3px;
    box-shadow: 0 0 15px rgba(0,0,0,0.1);
}

.timeline-item::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 20px;
    height: 20px;
    background: #999;
    border-radius: 50%;
    transform: translateY(-50%);
    z-index: 4;
    box-shadow: 0 0 0 4px rgba(255,255,255,0.5), 0 0 0 8px rgba(0,0,0,0.05);
    transition: background 0.3s ease;
}

.timeline-item:hover::after {
    background: #777;
}

.timeline-item::before {
    content: '';
    position: absolute;
    top: 50%;
    height: 3px;
    background: #999;
    transform: translateY(-50%);
    z-index: 3;
}

.timeline-item:nth-child(odd) {
    margin-left: 8%;
}

.timeline-item:nth-child(odd)::after {
    right: -35px;
}

.timeline-item:nth-child(odd)::before {
    right: -35px;
    width: 35px;
}

.timeline-item:nth-child(even) {
    margin-left: 50%;
}

.timeline-item:nth-child(even)::after {
    left: -35px;
}

.timeline-item:nth-child(even)::before {
    left: -35px;
    width: 35px;
}

.timeline-label {
    font-weight: bold;
    display: block;
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.timeline-event {
    display: block;
    font-weight: bold;
    font-size: 1.2rem;
    color: #333;
    margin-bottom: 0.5rem;
}

/* Timeline item styles */
.timeline-item {
    position: relative;
    margin: 4rem 0;
    padding: 1.5rem;
    background: white;
    border-radius: 10px;
    width: 42%;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    z-index: 3;
    cursor: help;
}

.timeline-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

/* Fix timeline item hover tooltips */
.timeline-description {
    display: none;
}

.timeline-item:hover .timeline-description {
    display: block;
    position: absolute;
    z-index: 10;
    background: rgba(30, 30, 30, 0.95);
    color: white;
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 0.9rem;
    line-height: 1.5;
    width: max-content;
    max-width: 300px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    pointer-events: none;
    white-space: normal;
}

.timeline-item:nth-child(odd):hover .timeline-description {
    left: calc(100% + 20px);
    top: 50%;
    transform: translateY(-50%);
}

.timeline-item:nth-child(even):hover .timeline-description {
    right: calc(100% + 20px);
    left: auto;
    top: 50%;
    transform: translateY(-50%);
}

/* Remove broken tooltip implementation */

/* Adjust positions for mobile */
@media (max-width: 768px) {
    .timeline-item:hover .timeline-description {
        position: fixed;
        left: 50% !important;
        right: auto !important;
        top: 50% !important;
        transform: translate(-50%, -50%) !important;
        width: 90%;
        max-width: 300px;
    }
}

/* Special timeline items */
.timeline-item.disruption {
    background: rgba(255, 232, 229, 0.9);
    border: 2px solid #ff6a4d;
}

.timeline-item.disruption::after {
    background: #ff6a4d;
    box-shadow: 0 0 0 4px rgba(255,255,255,0.6), 0 0 0 8px rgba(255,106,77,0.3);
}

.timeline-item.disruption::before {
    background: #ff6a4d;
}

.timeline-item.present {
    background: rgba(255, 232, 229, 0.9);
    border: 2px solid #ff6a4d;
}

.timeline-item.present::after {
    background: #ff6a4d;
    box-shadow: 0 0 0 4px rgba(255,255,255,0.6), 0 0 0 8px rgba(255,106,77,0.3);
}

.timeline-item.present::before {
    background: #ff6a4d;
}



/* Mobile adjustments */
@media (max-width: 768px) {
    .timeline-item {
        width: 80%;
        margin-left: 10% !important;
    }
    
    .timeline-wrapper::before {
        left: 30px;
    }
    
    .timeline-item::after {
        left: -20px !important;
        right: auto !important;
    }
    
    .timeline-item::before {
        left: -20px !important;
        right: auto !important;
        width: 20px !important;
    }
    
    .timeline-cascade {
        width: 85%;
        margin-left: 15%;
    }
    
    .eea-label, .post-eea-label {
        padding: 8px 12px;
        font-size: 0.9rem;
    }
    
    /* Adjust tooltips for mobile */
}

/* Key Content Elements Section */
.key-content-section {
    background-color: #f8f9fa;
    padding: 4rem 0;
    margin: 2rem 0;
    width: 100%;
}

.key-content-section h3 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #333;
}

.key-content-section p {
    text-align: center;
    margin: 0 auto 1rem;
    max-width: 800px;
}
.key-content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2.5rem 0 3.5rem;
}

.key-content-item {
    background: var(--light-gray);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border-top: 4px solid var(--link-color);
}

.key-content-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.key-content-item h4 {
    color: var(--dark-gray);
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 1.3rem;
    border-bottom: 1px solid rgba(0,0,0,0.1);
    padding-bottom: 0.75rem;
    position: relative;
}

.key-content-item h4::before {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--link-color);
    border-radius: 1.5px;
}

.key-content-item p {
    margin: 0;
    font-size: 1rem;
    line-height: 1.6;
    color: #555;
}

@media (max-width: 768px) {
    .key-content-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .key-content-item {
        padding: 1.5rem;
    }

    .key-content-item h4 {
        font-size: 1.2rem;
    }
}

/* Timeline cascade */
.timeline-cascade {
    width: 70%;
    margin: 4rem auto;
    position: relative;
    background: #fff6f0;
    padding: 1.5rem;
    border-radius: 10px;
    border: 2px solid #FF9900;
    z-index: 4;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    overflow: visible;
}

.cascade-header {
    text-align: center;
    font-weight: bold;
    margin-bottom: 1.25rem;
    color: #333;
    font-size: 1.2rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid #FF9900;
}

.cascade-item {
    background: white;
    margin: 0.75rem 0;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    position: relative;
    cursor: pointer;
    box-shadow: 0 3px 8px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    overflow: hidden;
    height: auto;
}

.cascade-item span {
    font-weight: bold;
    display: block;
    text-align: center;
    color: #444;
    position: relative;
    z-index: 2;
}

.cascade-tooltip {
    position: absolute;
    display: none;
    background: rgba(30, 30, 30, 0.95);
    color: white;
    padding: 1rem;
    border-radius: 0 0 6px 6px;
    font-size: 0.9rem;
    line-height: 1.5;
    font-weight: normal;
    width: 100%;
    top: 100%;
    left: 0;
    z-index: 1;
    margin-top: -6px;
}

.cascade-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.12);
    overflow: visible;
    z-index: 10;
    border-radius: 6px 6px 0 0;
}

.cascade-item:hover .cascade-tooltip {
    display: block;
}

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

/* Extra responsive styles for small screens */
@media (max-width: 480px) {
    .timeline-item {
        width: calc(100% - 40px);
        margin-left: 40px !important;
        padding: 1rem;
    }
    
    .timeline-event {
        font-size: 1rem;
    }

}

@media (max-width: 768px) {
    .cascade-item {
        margin: 0.5rem 0;
    }
    
    .cascade-tooltip {
        font-size: 0.85rem;
        padding: 0.75rem;
    }
}

.toc-note {
    font-size: 0.85rem;
    font-style: italic;
    color: #666;
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid #eee;
}

/* Book Preview section */
.book-preview {
    margin: 0;
    padding: 4rem 0;
    background: #f8f9fa;
    width: 100%;
    border-radius: 0;
}

.book-preview h3 {
    text-align: center;
    margin-bottom: 2rem;
}

.preview-layout {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    max-width: 1035px;
    margin: 0 auto;
}

.toc-container {
    background: white;
    padding: 1.5rem;
    border-radius: 6px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.toc-container h4 {
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.toc-list {
    padding-left: 1.5rem;
    margin-bottom: 0;
    max-height: 600px;
    overflow-y: auto;
}

.toc-list li {
    margin-bottom: 0.75rem;
    position: relative;
    font-size: 0.95rem;
}

.excerpt-container {
    background: white;
    padding: 1.5rem;
    border-radius: 6px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.excerpt-container h4 {
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.chapter-excerpt {
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.chapter-excerpt p {
    margin-bottom: 1rem;
}

.book-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    font-size: 0.9rem;
}

.book-details p {
    margin: 0;
}

.preview-link {
    grid-column: span 2;
    text-align: right;
    font-weight: bold;
}

@media (max-width: 768px) {
    .preview-layout {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}