/* =====================================================
   LAUGHING THROUGH THE STRUGGLES - ACADEMIC WEBSITE
   CHI '26 Paper Website Styles
   ===================================================== */

/* CSS Variables */
:root {
    /* Colors - ADHD-friendly palette with warm, inclusive tones */
    --primary: #4F46E5;
    --primary-light: #818CF8;
    --primary-dark: #3730A3;
    --secondary: #F59E0B;
    --secondary-light: #FBBF24;

    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;

    --text-primary: #111827;
    --text-secondary: #4B5563;
    --text-muted: #9CA3AF;

    --accent-green: #10B981;
    --accent-red: #EF4444;
    --accent-blue: #3B82F6;
    --accent-purple: #8B5CF6;
    --accent-pink: #EC4899;

    --border: #E5E7EB;
    --border-light: #F3F4F6;

    /* Typography */
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Effects */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;

    --transition: all 0.2s ease;
    --transition-slow: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition);
}

.nav.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo .logo-text {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    padding: var(--space-4xl) var(--space-lg);
    text-align: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    opacity: 0.05;
}

.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%234F46E5' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    padding-bottom: 84px;
}

.hero-badge {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.badge-conference {
    background: var(--primary);
    color: white;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-2xl);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.badge-date {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-2xl);
    font-size: 0.75rem;
    font-weight: 500;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 50%, var(--accent-pink) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title-row {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-bottom: var(--space-lg);
}

.hero-title-row .hero-title {
    margin-bottom: 0;
}

.award-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.9rem;
    border-radius: 12px;
    border: 2px solid #d5d8e1;
    background: #eff1f6;
    color: #2f3137;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    line-height: 1;
    text-transform: uppercase;
    white-space: nowrap;
}

.award-badge::before {
    content: "🏅";
    font-size: 1rem;
    line-height: 1;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto var(--space-2xl);
    line-height: 1.4;
}

.hero-authors {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.author {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
}

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

.hero-cta {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
    transform: translateY(-10px);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 0.875rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: var(--primary);
    color: white;
}

.hero-scroll {
    position: absolute;
    bottom: var(--space-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-indicator {
    width: 24px;
    height: 40px;
    border: 2px solid var(--border);
    border-radius: 12px;
    position: relative;
}

.scroll-indicator::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0%, 100% { opacity: 1; top: 8px; }
    50% { opacity: 0.5; top: 16px; }
}

/* Sections */
.section {
    padding: var(--space-4xl) 0;
}

.section-alt {
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-tag {
    display: inline-block;
    background: var(--primary-light);
    color: white;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-2xl);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--text-primary);
}

/* Abstract Card */
.abstract-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
    margin-bottom: var(--space-3xl);
}

.abstract-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: var(--space-lg);
    color: var(--primary);
}

.abstract-card p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.abstract-card p:last-child {
    margin-bottom: 0;
}

/* Research Questions */
.research-questions h3 {
    text-align: center;
    margin-bottom: var(--space-xl);
    font-family: var(--font-display);
    color: var(--text-primary);
}

.rq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-3xl);
}

.rq-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: var(--transition);
}

.rq-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.rq-number {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-2xl);
    font-size: 0.875rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.rq-card p {
    color: var(--text-secondary);
    font-style: italic;
}

/* Key Stats */
.key-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-lg);
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: var(--space-sm);
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* Methods */
.methods-overview {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-3xl);
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.methods-flow {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
}

.method-step {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    display: flex;
    gap: var(--space-lg);
    transition: var(--transition);
}

.method-step:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.step-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--primary-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.step-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.step-content h4 {
    font-size: 1rem;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.step-content p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Findings Section */
.finding-section {
    margin-bottom: var(--space-3xl);
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}

.finding-header {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-xl);
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg-secondary);
}

.finding-header:hover {
    background: var(--bg-tertiary);
}

.finding-number {
    background: var(--primary);
    color: white;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.875rem;
}

.finding-header h3 {
    flex: 1;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.toggle-icon {
    font-size: 1.5rem;
    color: var(--primary);
    font-weight: 300;
}

.finding-content {
    padding: var(--space-xl);
    display: none;
}

.finding-content.active {
    display: block;
}

.finding-intro {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    font-size: 1rem;
    line-height: 1.8;
}

/* Theme Accordion */
.theme-accordion {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.theme-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.theme-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg);
    background: var(--bg-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.theme-header:hover {
    background: var(--bg-tertiary);
}

.theme-header h4 {
    font-size: 1rem;
    color: var(--text-primary);
}

.theme-toggle {
    font-size: 1.25rem;
    color: var(--primary);
    font-weight: 300;
}

.theme-content {
    padding: var(--space-lg);
    display: none;
}

.theme-content.active {
    display: block;
}

.subthemes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-md);
}

.subtheme-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
}

.subtheme-card h5 {
    font-size: 0.9375rem;
    color: var(--primary);
    margin-bottom: var(--space-sm);
}

.subtheme-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.figure-reference {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--primary);
    font-size: 0.8125rem;
    cursor: pointer;
    padding: var(--space-sm) var(--space-md);
    background: white;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.figure-reference:hover {
    background: var(--primary);
    color: white;
}

/* Forms Grid */
.forms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.form-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    transition: var(--transition);
}

.form-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.form-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.form-card h4 {
    font-size: 1rem;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.form-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

/* Emotion Section */
.emotion-section {
    margin-bottom: var(--space-2xl);
}

.emotion-section h4 {
    margin-bottom: var(--space-xl);
    color: var(--text-primary);
}

.emotion-chart {
    max-width: 600px;
    margin: 0 auto;
}

.emotion-bar {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.bar-label {
    width: 80px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.bar-container {
    flex: 1;
    height: 24px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    background: var(--text-muted);
    border-radius: var(--radius-sm);
    transition: width 1s ease;
}

.bar-fill.positive {
    background: var(--accent-green);
}

.bar-fill.negative {
    background: var(--accent-red);
}

.bar-value {
    width: 60px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-align: right;
}

/* Topics Section */
.topics-section h4 {
    margin-bottom: var(--space-xl);
    color: var(--text-primary);
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
}

.topic-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.topic-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
}

.topic-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-light);
    opacity: 0.5;
    margin-bottom: var(--space-sm);
}

.topic-card h5 {
    font-size: 1rem;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.topic-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Discussion */
.discussion-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.discussion-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}

.discussion-icon {
    font-size: 2rem;
    margin-bottom: var(--space-md);
}

.discussion-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

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

.expert-quote {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    text-align: center;
}

.expert-quote blockquote {
    color: white;
    font-size: 1.25rem;
    font-style: italic;
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.expert-quote cite {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
}

/* Implications */
.implications-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.implication-item {
    display: flex;
    gap: var(--space-xl);
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: var(--transition);
}

.implication-item:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
}

.implication-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-light);
    line-height: 1;
}

.implication-content h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.implication-content p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Conclusion */
.conclusion-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.contribution-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}

.contribution-card h3 {
    font-size: 1rem;
    margin-bottom: var(--space-sm);
    color: var(--primary);
}

.contribution-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.paper-info {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.info-item {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--border-light);
}

.info-item:last-child {
    border-bottom: none;
}

.info-label {
    font-weight: 600;
    color: var(--text-primary);
    min-width: 100px;
}

.info-value {
    color: var(--text-secondary);
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
    flex-wrap: wrap;
}

.footer-citation {
    flex: 1;
    min-width: 300px;
}

.footer-citation h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
    opacity: 0.7;
}

.footer-citation p {
    font-size: 0.875rem;
    opacity: 0.8;
    line-height: 1.7;
}

.footer-links {
    display: flex;
    gap: var(--space-lg);
}

.footer-links a {
    color: white;
    opacity: 0.7;
    font-size: 0.875rem;
}

.footer-links a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: 0.75rem;
    opacity: 0.6;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    padding: var(--space-xl);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--radius-xl);
    max-width: 90vw;
    max-height: 90vh;
    overflow: auto;
    position: relative;
    padding: var(--space-md);
}

.modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-muted);
    z-index: 10;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 50%;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-image-container img,
.modal-image-container iframe {
    max-width: 100%;
    max-height: 80vh;
    border-radius: var(--radius-md);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    inset: 0;
    background: white;
    z-index: 999;
    padding-top: 80px;
}

.mobile-menu.active {
    display: block;
}

.mobile-menu-content {
    display: flex;
    flex-direction: column;
    padding: var(--space-xl);
}

.mobile-menu-content a {
    padding: var(--space-lg);
    font-size: 1.125rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-light);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .nav-menu-btn {
        display: flex;
    }

    .hero-authors {
        flex-direction: column;
        gap: var(--space-md);
    }

    .hero-cta {
        flex-direction: column;
        transform: translateY(-6px);
    }

    .key-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .implication-item {
        flex-direction: column;
        gap: var(--space-md);
    }

    .info-item {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .footer-content {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }

    .section {
        padding: var(--space-2xl) 0;
    }

    .hero-title {
        font-size: 2rem;
    }

    .award-badge {
        font-size: 0.75rem;
        padding: 0.4rem 0.75rem;
    }

    .hero-content {
        padding-bottom: 92px;
    }

    .key-stats {
        grid-template-columns: 1fr 1fr;
        padding: var(--space-lg);
    }

    .stat-number {
        font-size: 1.75rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

/* Print styles */
@media print {
    .nav, .hero-scroll, .modal, .mobile-menu {
        display: none !important;
    }

    .hero {
        min-height: auto;
        padding: var(--space-xl);
    }

    .section {
        page-break-inside: avoid;
    }
}