:root {
    --primary-bg: #ffffff;
    --secondary-bg: #f5f5f5;
    --accent-color: #0d351c;
    --accent-color-light: #b7e6c4;
    --accent-color-lighter: #f5f6ee;
    --accent-color-dark: #474a2c;
    --text-primary: #333333;
    --text-secondary: #666666;
    --font-family: 'Fraunces', serif;
    --container-width: 1200px;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --border-radius: 12px;
}

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

body {
    margin: 0;
    font-family: var(--font-family);
    background-color: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 calc(var(--spacing-md) * 1.5);
}

nav {
    background-color: var(--primary-bg);
    padding: calc(var(--spacing-md) * 1.2);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: 0 6px 24px 0 rgba(0, 0, 0, 0.08);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.logo {
    color: var(--accent-color-dark);
    font-weight: 800;
    font-size: 2rem;
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: translateY(-2px);
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

nav a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

nav a:after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--accent-color);
    transition: width 0.3s ease;
}

nav a:hover:after {
    width: 100%;
}

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

/* Dropdown for Lessons nav item */
.nav-links {
  position: relative;
}

.nav-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--primary-bg);
  box-shadow: 0 8px 24px rgba(13,53,28,0.10);
  border-radius: 0 0 12px 12px;
  min-width: 220px;
  z-index: 1100;
  padding: 0.5rem 0;
  border: 1px solid var(--accent-color-lighter);
  animation: fadeInDropdown 0.2s;
}

.nav-dropdown a {
  display: block;
  padding: 0.7rem 1.5rem;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 500;
  transition: background 0.18s, color 0.18s;
  border-radius: 6px;
}

.nav-dropdown a:hover {
  background: var(--accent-color-lighter);
  color: var(--accent-color);
}

.nav-links .dropdown-parent {
  position: relative;
  cursor: pointer;
}

.nav-links .dropdown-parent:after {
  content: '\25BC';
  font-size: 0.7em;
  margin-left: 0.4em;
  color: var(--accent-color-dark);
  vertical-align: middle;
  transition: transform 0.2s;
}

.nav-links .dropdown-parent.open:after {
  transform: rotate(-180deg);
}

.nav-links .dropdown-parent.open .nav-dropdown {
  display: block;
}

@keyframes fadeInDropdown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 600px) {
  .nav-dropdown {
    left: auto;
    right: 0;
    min-width: 160px;
  }
}

main {
    margin-top: 120px;
}

.hero {
    padding: calc(var(--spacing-lg) * 1.5) 0;
    min-height: 90vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background-color: var(--secondary-bg);
    color: var(--text-primary);
    margin: 0;
}

.hero::before {
    content: none;
}

@keyframes heroGlow {}

.hero > .container, .hero-content, .hero-grid {
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 1200px;
    width: 100%;
}

.hero-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.4fr;
    gap: calc(var(--spacing-lg) * 1.5);
    align-items: center;
}

.hero-image {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-image:hover {
    transform: scale(1.02);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
}

.hero-image-container {
    padding: calc(var(--spacing-md) * 1.5);
    position: relative;
}

.hero-image-container::before {
    content: none;
}

.hero-image-container:hover::before {
    content: none;
}

h1, h3 {
    position: relative;
    overflow: hidden;
}

h1::after, h3::after {
    content: '';
    display: block;
    position: absolute;
    left: 0;
    bottom: -8px;
    height: 4px;
    width: 0;
    background: linear-gradient(90deg, var(--accent-color), transparent 80%);
    border-radius: 2px;
    transition: width 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 2;
}

h1.in-view::after, h3.in-view::after {
    width: 80%;
}

h1 {
    font-size: 6rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: calc(var(--spacing-md) * 1.5);
    letter-spacing: -0.03em;
}

.accent-text {
    color: var(--accent-color);
    font-style: italic;
    position: relative;
    display: inline-block;
}

.accent-text:after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--accent-color);
    opacity: 0.3;
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: calc(var(--spacing-md) * 1.5);
    color: var(--text-secondary);
    font-weight: 400;
    max-width: 600px;
}

.button-accent {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(89, 169, 106, 0.2);
}

.button-accent:hover {
    background-color: var(--accent-color-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(89, 169, 106, 0.3);
}

.hero-button {
    font-size: 1.5rem;
    padding: 1.5rem 4rem;
    margin-top: 2rem;
    transform: scale(1);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-button:hover {
    transform: scale(1.05);
    background-color: var(--accent-color-dark);
    box-shadow: 0 8px 30px rgba(89, 169, 106, 0.3);
}

.contrast-section {
    background-color: var(--secondary-bg);
    color: var(--text-primary);
    padding: var(--spacing-lg) 0;
    margin: 0;
    position: relative;
    overflow: hidden;
}

.contrast-section:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(13, 53, 28, 0.1) 0%, transparent 100%);
    z-index: 1;
}

.features-grid {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    align-items: stretch;
    margin: var(--spacing-lg) 0;
    flex-wrap: wrap;
}

.feature-card {
    background-color: var(--accent-color-lighter);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid var(--accent-color-light);
    color: var(--text-primary);
    flex: 1 1 0;
    min-height: 260px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.feature-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 8px 20px rgba(89, 169, 106, 0.1);
    border-color: var(--accent-color);
}

.feature-card h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-weight: 700;
}

.feature-card p {
    color: var(--text-secondary);
}

/* Methodology page specific styles */
.methodology-section {
    padding: var(--spacing-lg) 0;
    background: var(--secondary-bg);
    color: var(--text-primary);
    min-height: 100vh;
}

.methodology-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.methodology-header h1 {
    font-size: 5rem;
    margin-bottom: var(--spacing-md);
    line-height: 1;
}

.methodology-intro {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 1.6;
}

.methodology-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.methodology-card {
    background-color: var(--accent-color-lighter);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    border: 1px solid var(--accent-color-light);
}

.methodology-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-color);
}

.methodology-card h3 {
    color: var(--accent-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.methodology-card h3::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 24px;
    background: var(--accent-color);
    border-radius: 2px;
}

.methodology-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.methodology-list li {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.6;
}

.methodology-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-color);
}

.methodology-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.methodology-table th,
.methodology-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.methodology-table th {
    background: rgba(255, 255, 255, 0.1);
    font-weight: 600;
}

.methodology-table tr:hover {
    background: rgba(255, 255, 255, 0.08);
}

.check-icon {
    color: var(--accent-color);
    font-weight: bold;
}

/* Lessons page styles */
.lessons-section {
    padding: var(--spacing-lg) 0;
}

.section-intro {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    text-align: center;
}

.lesson-accordion {
    max-width: 800px;
    margin: 0 auto;
}

.lesson-item {
    background: var(--primary-bg);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.lesson-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.lesson-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.lesson-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-color-dark);
    margin-bottom: 0.3rem;
    letter-spacing: 0.02em;
}

.lesson-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-color);
    line-height: 1.1;
    letter-spacing: -0.01em;
}

.accordion-icon {
    font-size: 1.5rem;
    font-weight: 300;
    transition: transform 0.3s ease;
}

.lesson-item.active .accordion-icon {
    transform: rotate(45deg);
}

.lesson-content {
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    background: var(--primary-bg);
}

.lesson-content.active {
    padding: 1.5rem;
    max-height: 500px;
}

.lesson-preview {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.lesson-preview p {
    margin-bottom: 1rem;
    line-height: 1.6;
}

.lesson-link {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
    font-weight: 500;
}

.lesson-link:hover {
    background-color: var(--accent-color-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(89, 169, 106, 0.2);
}

.lessons-section h1 {
    text-align: center;
    white-space: nowrap;
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }
    
    .nav-links {
        display: none;
    }

    main {
        margin-top: 100px;
    }
}

@media (max-width: 600px) {
    .lesson-title { font-size: 1.5rem; }
    .lesson-number { font-size: 1.2rem; }
}

.fade-slide-up {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-slide-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Quiz Page Styles */
.quiz-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--secondary-bg);
    padding: var(--spacing-lg) 0;
}

.quiz-card {
    background-color: var(--accent-color-lighter);
    border-radius: 24px;
    box-shadow: 0 8px 32px rgba(13, 53, 28, 0.12);
    max-width: 480px;
    margin: 0 auto;
    padding: 2.5rem 2rem 2rem 2rem;
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    animation: fadeInUp 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid var(--accent-color-light);
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(32px); }
    to { opacity: 1; transform: translateY(0); }
}

.quiz-progress-bar {
    width: 100%;
    height: 10px;
    background: #ececec;
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 4px rgba(41, 40, 43, 0.06);
}

.quiz-progress {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-color), #e3dfdc 80%);
    border-radius: 6px;
    transition: width 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.quiz-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    text-align: center;
}

.quiz-question-card {
    margin-bottom: 1.5rem;
}

.quiz-question {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.quiz-option {
    background-color: var(--primary-bg);
    border: 1px solid var(--accent-color-lighter);
    border-radius: 12px;
    padding: 1rem;
    font-size: 1rem;
    cursor: pointer;
    transition: border 0.2s, background 0.2s;
    text-align: left;
    color: var(--text-primary);
    font-weight: 500;
}

.quiz-option:hover {
    background-color: var(--accent-color-lighter);
    border-color: var(--accent-color);
}

.quiz-option.selected {
    border: 2px solid var(--accent-color);
    background: var(--accent-color-light);
}

.quiz-option.correct {
    border: 2px solid var(--accent-color);
    background: var(--accent-color);
    color: white;
}

.quiz-option.incorrect {
    border: 2px solid #e8493b;
    background: #ffe7e4;
}

.quiz-controls {
    display: flex;
    justify-content: flex-end;
    margin-top: 1rem;
}

.quiz-result-card {
    background-color: var(--accent-color-lighter);
    border-radius: 16px;
    padding: 2rem 1.5rem;
    text-align: center;
    box-shadow: 0 2px 8px rgba(13, 53, 28, 0.08);
    margin-top: 2rem;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    animation: fadeInUp 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid var(--accent-color-light);
}

.quiz-result-card.pass {
    border: 2px solid var(--accent-color);
    background-color: var(--accent-color-lighter);
    color: var(--accent-color);
}

.quiz-result-card.fail {
    border: 2px solid var(--accent-color);
    background: #ffe7e4;
    color: var(--accent-color);
}

/* New content sections */
.methodology-preview {
    padding: var(--spacing-lg) 0;
    background-color: var(--accent-color-lighter);
}

.methodology-preview-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    align-items: center;
}

.methodology-preview-content {
    padding: var(--spacing-md);
}

.methodology-preview-content h2 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--accent-color);
    line-height: 1.1;
}

.methodology-preview-content p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.methodology-preview-image {
    width: 100%;
    height: 400px;
    background-size: cover;
    background-position: center;
    border-radius: var(--border-radius);
    box-shadow: 0 20px 40px rgba(13, 53, 28, 0.1);
}

.stats-section {
    padding: 0;
    background-color: var(--accent-color);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    text-align: center;
}

.stat-item {
    padding: var(--spacing-md);
}

.stat-number {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--accent-color-light);
}

.stat-label {
    font-size: 1.25rem;
    font-weight: 500;
}

@media (max-width: 768px) {
    .methodology-preview-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .methodology-preview-content h2 {
        font-size: 2.5rem;
    }
}

/* Scroll animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.6s ease-out, transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.6s ease-out, transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Lessons page styles */
.lessons-section {
    padding: var(--spacing-lg) 0;
}

.lessons-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.lesson-card {
    background-color: var(--accent-color-lighter);
    border-radius: var(--border-radius);
    padding: calc(var(--spacing-md) * 0.8);
    border: 2px solid transparent;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: block;
    height: 100%;
    box-shadow: 0 4px 12px rgba(13, 53, 28, 0.08);
}

.lesson-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--accent-color) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lesson-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(13, 53, 28, 0.15);
    border-color: var(--accent-color);
}

.lesson-card:hover::before {
    opacity: 0.1;
}

.lesson-description {
    color: var(--text-secondary);
    margin-bottom: 1.2rem;
    font-size: 0.95rem;
    line-height: 1.5;
}

.lesson-progress {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: 0.8rem;
    padding-top: 0.8rem;
    border-top: 1px solid var(--accent-color-light);
}

.progress-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--accent-color-light);
    transition: all 0.3s ease;
}

.progress-dot.active {
    background-color: var(--accent-color);
    transform: scale(1.3);
}

.progress-dot.completed {
    background-color: var(--accent-color);
}

/* Responsive styles for lessons grid */
@media (max-width: 768px) {
    .lessons-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
        padding: 0 var(--spacing-sm);
    }
    
    .lesson-card {
        padding: var(--spacing-sm);
    }
    
    .lesson-title {
        font-size: 1.1rem;
    }
    
    .lesson-description {
        font-size: 0.9rem;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .lessons-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1025px) {
    .lessons-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Zelda section styles */
.zelda-section {
    padding: var(--spacing-lg) 0;
    background-color: var(--accent-color-lighter);
    text-align: center;
}

.zelda-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.zelda-text {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: var(--spacing-sm);
}

.zelda-image {
    cursor: pointer;
    max-width: 150px;
    height: auto;
    filter: drop-shadow(0 4px 8px rgba(13, 53, 28, 0.2));
    transition: transform 0.3s ease;
}

.zelda-image:hover {
    transform: translateY(-5px) scale(1.05);
}

/* Timeline styles */
.methodology-timeline {
    padding: var(--spacing-lg) 0;
    background-color: var(--primary-bg);
}

.timeline {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-md);
    position: relative;
    padding: var(--spacing-lg) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-color-light);
    transform: translateY(-50%);
    z-index: 1;
}

.timeline-item {
    flex: 1;
    position: relative;
    z-index: 2;
}

.timeline-content {
    background: var(--accent-color-lighter);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 0 4px 12px rgba(13, 53, 28, 0.1);
    transition: transform 0.3s ease;
}

.timeline-content:hover {
    transform: translateY(-5px);
}

.timeline-icon {
    font-size: 2rem;
    margin: var(--spacing-sm) 0;
}

/* Interactive cards */
.feature-card.interactive {
    position: relative;
    width: 320px;
    min-height: 260px;
    height: 100%;
    margin: 0 0.5rem;
    perspective: 1000px;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(13, 53, 28, 0.08);
    background: none;
    display: flex;
    align-items: stretch;
}

.card-front,
.card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    background: var(--accent-color-lighter);
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card-back {
    transform: rotateY(180deg);
    background: var(--accent-color);
    color: white;
}

.feature-card.interactive:hover .card-front,
.feature-card.interactive:focus-within .card-front {
    transform: rotateY(180deg);
}

.feature-card.interactive:hover .card-back,
.feature-card.interactive:focus-within .card-back {
    transform: rotateY(0);
}

.card-back ul {
    list-style: none;
    padding: 0;
    margin: var(--spacing-sm) 0;
}

.card-back li {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.card-back li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-color-light);
}

/* CTA section */
.methodology-cta {
    padding: var(--spacing-lg) 0;
    background: var(--accent-color);
    color: white;
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.cta-content .button-accent {
    background: white;
    color: var(--accent-color);
}

.cta-content .button-accent:hover {
    background: var(--accent-color-light);
    color: var(--accent-color);
}

@media (max-width: 768px) {
    .timeline {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .timeline::before {
        width: 2px;
        height: 100%;
        left: 50%;
        top: 0;
        transform: translateX(-50%);
    }
    
    .timeline-item {
        width: 100%;
    }
}

@media (max-width: 1100px) {
    .features-grid {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-lg);
    }
    .feature-card.interactive {
        width: 90vw;
        min-width: 0;
        max-width: 400px;
    }
}

.parallax-section {
    position: relative;
    overflow: hidden;
    padding: var(--spacing-lg) 0;
}

.parallax-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transform: translateZ(-1px) scale(2);
    z-index: -1;
}

.parallax-content {
    position: relative;
    z-index: 1;
    padding: var(--spacing-lg) 0;
}

/* Remove accent-highlight-section, svg-wave-top, and accent-highlight-content styles */
.accent-highlight-section, .svg-wave-top, .accent-highlight-content { display: none !important; }

/* Methodology page styles */
.methodology-hero {
    padding: var(--spacing-lg) 0;
    background-color: var(--accent-color-lighter);
    text-align: center;
}

.methodology-intro {
    font-size: 1.5rem;
    max-width: 800px;
    margin: 0 auto;
    color: var(--text-secondary);
}

/* Timeline styles */
.timeline {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-md);
    position: relative;
    padding: var(--spacing-lg) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-color-light);
    transform: translateY(-50%);
    z-index: 1;
}

.timeline-item {
    flex: 1;
    position: relative;
    z-index: 2;
}

.timeline-content {
    background: var(--accent-color-lighter);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 0 4px 12px rgba(13, 53, 28, 0.1);
    transition: transform 0.3s ease;
}

.timeline-content:hover {
    transform: translateY(-5px);
}

.timeline-icon {
    font-size: 2rem;
    margin: var(--spacing-sm) 0;
}

@media (max-width: 768px) {
    .timeline {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .timeline::before {
        width: 2px;
        height: 100%;
        left: 50%;
        top: 0;
        transform: translateX(-50%);
    }
    
    .timeline-item {
        width: 100%;
    }
}

@media (max-width: 1100px) {
    .features-grid {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-lg);
    }
    .feature-card.interactive {
        width: 90vw;
        min-width: 0;
        max-width: 400px;
    }
}

.parallax-section {
    position: relative;
    overflow: hidden;
    padding: var(--spacing-lg) 0;
}

.parallax-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transform: translateZ(-1px) scale(2);
    z-index: -1;
}

.parallax-content {
    position: relative;
    z-index: 1;
    padding: var(--spacing-lg) 0;
}

/* Remove accent-highlight-section, svg-wave-top, and accent-highlight-content styles */
.accent-highlight-section, .svg-wave-top, .accent-highlight-content { display: none !important; }

/* External link indicators */
.external-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.external-link::after {
    content: '↗';
    font-size: 0.8em;
    color: var(--accent-color);
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.external-link:hover::after {
    opacity: 1;
}

.external-link-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-color-dark);
    color: white;
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius);
    font-size: 0.85rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 1000;
    margin-bottom: 0.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.external-link-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: var(--accent-color-dark);
}

.external-link:hover .external-link-tooltip {
    opacity: 1;
    visibility: visible;
}

/* Responsive styles for lessons grid */
@media (max-width: 768px) {
    .timeline {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .timeline::before {
        width: 2px;
        height: 100%;
        left: 50%;
        top: 0;
        transform: translateX(-50%);
    }
    
    .timeline-item {
        width: 100%;
    }
}

@media (max-width: 1100px) {
    .features-grid {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-lg);
    }
    .feature-card.interactive {
        width: 90vw;
        min-width: 0;
        max-width: 400px;
    }
}

.parallax-section {
    position: relative;
    overflow: hidden;
    padding: var(--spacing-lg) 0;
}

.parallax-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transform: translateZ(-1px) scale(2);
    z-index: -1;
}

.parallax-content {
    position: relative;
    z-index: 1;
    padding: var(--spacing-lg) 0;
}

/* Remove accent-highlight-section, svg-wave-top, and accent-highlight-content styles */
.accent-highlight-section, .svg-wave-top, .accent-highlight-content { display: none !important; }
  
.verify-claims-link {
  position: absolute;
  right: 16px;
  top: 8px;
  font-size: 0.95rem;
  color: var(--accent-color-dark);
  background: var(--accent-color-lighter);
  border-radius: 8px;
  padding: 0.4rem 1rem;
  text-decoration: underline dotted;
  opacity: 0.85;
  z-index: 10;
  transition: background 0.2s, color 0.2s;
}
.verify-claims-link:hover {
  background: var(--accent-color);
  color: #fff;
  opacity: 1;
}