/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0f172a;
    --secondary-color: #1e293b;
    --accent-color: #3b82f6;
    --dark-color: #0f172a;
    --light-color: #ffffff;
    --gray-color: #64748b;
    --light-gray: #f8fafc;
    --success-color: #059669;
    --warning-color: #d97706;
    --danger-color: #dc2626;
    --border-radius: 12px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --gradient: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--dark-color);
    background-color: var(--light-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    z-index: 1000;
    padding: 20px 0;
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-logo img {
    border-radius: 6px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
}

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

/* Hero Section */
.hero {
    padding: 140px 0 100px;
    background: var(--gradient);
    color: white;
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.02);
    pointer-events: none;
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 80px;
    align-items: center;
}

.hero-content {
    padding-right: 60px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.1);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 3.8rem;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.05;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    letter-spacing: -0.02em;
}

.math-symbol {
    color: #ffffff;
    font-weight: 900;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
    font-size: 1.8rem;
    font-weight: 500;
    margin-bottom: 20px;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 30px;
    opacity: 0.8;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
    border: none;
    font-size: 16px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-xl);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

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

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

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

.visual-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    width: 100%;
}

.research-highlights {
    width: 100%;
    max-width: 450px;
}

.highlights-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: white;
    margin-bottom: 24px;
    text-align: center;
    position: relative;
}

.highlights-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 2px;
    background: var(--primary-color);
    border-radius: 1px;
}

.highlight-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.highlight-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.highlight-item:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.15);
}

.highlight-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), #ff8a80);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: white;
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.3);
}

.highlight-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    margin: 0 0 6px 0;
    line-height: 1.3;
}

.highlight-content p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.75);
    margin: 0;
    line-height: 1.4;
}

.demo-video {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.demo-video video {
    width: 100%;
    max-width: 100%;
    height: auto;
    display: block;
}

.video-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    text-align: center;
    opacity: 0;
}

.video-overlay i {
    font-size: 48px;
    margin-bottom: 10px;
    display: block;
}

.demo-video:hover .video-overlay {
    opacity: 1;
}

/* Section Styles */
section {
    padding: 100px 0;
    position: relative;
    z-index: 1;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    color: var(--dark-color);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.section-icon {
    font-size: 1.6rem;
    color: white;
    background: var(--primary-color);
    padding: 8px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* Framework Section */
.framework {
    background: white;
    padding: 80px 0 100px;
    position: relative;
    z-index: 2;
}

.subsection-title {
    font-size: 1.6rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 30px;
    color: var(--dark-color);
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 15px 25px;
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    display: inline-block;
    width: auto;
    margin-left: auto;
    margin-right: auto;
}

.paradigm-section {
    margin-bottom: 80px;
}

.paradigm-figure {
    text-align: center;
    margin-bottom: 30px;
}

.paradigm-image {
    max-width: 80%;
    height: auto;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.architecture-section {
    margin-bottom: 40px;
}

.architecture-figure {
    text-align: center;
    margin-bottom: 50px;
}

.architecture-image {
    max-width: 85%;
    height: auto;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.figure-caption {
    font-size: 0.95rem;
    color: var(--gray-color);
    line-height: 1.6;
    text-align: left;
    max-width: 100%;
    margin: 0 auto;
}

.figure-caption a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid transparent;
}

.figure-caption a:hover {
    border-bottom-color: var(--accent-color);
}

.experts-overview {
    margin-top: 40px;
}

.experts-title {
    font-size: 1.4rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 30px;
    color: var(--dark-color);
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    padding: 12px 20px;
    border-radius: 10px;
    border-left: 3px solid var(--primary-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    display: inline-block;
    width: auto;
    margin-left: auto;
    margin-right: auto;
}

.experts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    max-width: 1200px;
    margin: 0 auto;
}

/* Experts Simple List Styles */
.experts-simple-list {
    list-style: none;
    padding: 0;
    margin: 20px 0 0 0;
}

.experts-simple-list li {
    margin-bottom: 15px;
    padding-left: 0;
    line-height: 1.6;
    font-size: 1.1rem;
    color: var(--gray-color);
}

.experts-simple-list li:last-child {
    margin-bottom: 0;
}

.expert-emoji {
    font-size: 1.1rem;
    margin-right: 8px;
    display: inline-block;
    width: 20px;
    text-align: center;
}

.experts-simple-list strong {
    color: var(--dark-color);
    font-weight: 600;
}

/* Training Recipe Styles */
.training-recipe {
    margin-top: 40px;
}

.recipe-stages {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-top: 25px;
    gap: 15px;
}

.recipe-stage-item {
    flex: 1;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 20px 15px;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.recipe-stage-item:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.stage-indicator {
    width: 32px;
    height: 32px;
    background: var(--gradient);
    color: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.stage-info {
    flex: 1;
}

.stage-info h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark-color);
    margin: 0 0 8px 0;
    line-height: 1.3;
}

.stage-info p {
    font-size: 0.9rem;
    color: var(--gray-color);
    line-height: 1.5;
    margin: 0;
}

.stage-connector {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: bold;
    margin: 0 5px;
    flex-shrink: 0;
    align-self: center;
    margin-top: 20px;
}

/* Demo Section */
.demo {
    background: #f8fafc;
}

.demo-container {
    max-width: 2000px;
    margin: 0 auto;
    padding: 0 50px;
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 35px;
}

.demo-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.demo-card:hover {
    box-shadow: var(--shadow-lg);
}

.demo-card .demo-video {
    position: relative;
    overflow: hidden;
}

.demo-card video {
    width: 100%;
    height: auto;
    display: block;
}

.demo-info {
    padding: 20px;
}

.demo-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--dark-color);
}

.demo-info p {
    color: var(--gray-color);
    margin-bottom: 15px;
    font-size: 14px;
}

.performance-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--success-color), #34d399);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

/* Performance Section */
.performance {
    background: #f8fafc;
}

.performance-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.performance-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.performance-card h3 {
    background: var(--gradient);
    color: white;
    margin: 0;
    padding: 24px 20px;
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.performance-table {
    overflow-x: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.performance table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: var(--border-radius);
}

.performance th,
.performance td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

.performance th {
    background: #f8fafc;
    font-weight: 600;
    color: var(--dark-color);
    font-size: 14px;
}

.performance tr:last-child td {
    border-bottom: none;
}

.performance .improvement {
    color: var(--success-color);
    font-weight: 600;
}

/* Section subtitle */
.section-subtitle {
    text-align: center;
    color: var(--gray-color);
    font-size: 1.1rem;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Method Section */
.method {
    background: #f8fafc;
}

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

.architecture-diagram {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.expert {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    position: relative;
}

.expert::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

.expert i {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 15px;
    display: block;
}

.expert h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--dark-color);
}

.expert p {
    color: var(--gray-color);
    font-size: 14px;
    line-height: 1.5;
}

.method-description h3 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.method-description p {
    margin-bottom: 20px;
    color: var(--gray-color);
    line-height: 1.6;
}

.method-description ul {
    list-style: none;
    padding: 0;
}

.method-description li {
    margin-bottom: 15px;
    padding-left: 20px;
    position: relative;
    color: var(--gray-color);
}

.method-description li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

.method-description strong {
    color: var(--dark-color);
}

/* Citation Section */
.citation {
    background: white;
}

.citation-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    align-items: start;
}

.citation-text {
    background: #f8fafc;
    padding: 30px;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
}

.citation-text pre {
    margin: 0;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 14px;
    line-height: 1.5;
    color: var(--dark-color);
}

.citation-links {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* Footer */
.footer {
    background: var(--dark-color);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
    align-items: start;
}


.footer-info {
    text-align: left;
}

.footer-info p {
    color: #9ca3af;
    margin-bottom: 20px;
    font-size: 1.1rem;
    font-weight: 500;
    line-height: 1.4;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.footer-section h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: white;
}

.footer-section a {
    display: block;
    color: #9ca3af;
    text-decoration: none;
    margin-bottom: 8px;
}

.footer-section a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 30px;
    text-align: center;
    color: #9ca3af;
}

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

    .hero {
        padding: 120px 0 80px;
        height: 100vh;
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }

    .hero-content {
        padding-right: 0;
    }

    .research-highlights {
        max-width: 350px;
    }

    .highlight-item {
        padding: 16px;
        gap: 12px;
    }

    .highlight-icon {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .highlight-content h4 {
        font-size: 1rem;
    }

    .highlight-content p {
        font-size: 0.85rem;
    }

    .hero-title {
        font-size: 2.8rem;
        letter-spacing: -0.01em;
    }

    .hero-subtitle {
        font-size: 1.4rem;
    }

    .hero-description {
        font-size: 1rem;
        line-height: 1.6;
    }

    .hero-buttons {
        justify-content: center;
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .paradigm-image {
        max-width: 95%;
    }

    .experts-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .section-title {
        font-size: 2.2rem;
        gap: 12px;
    }
    
    .section-icon {
        font-size: 1.4rem;
        padding: 6px;
    }
    
    .subsection-title {
        font-size: 1.4rem;
        padding: 12px 20px;
    }
    
    .experts-title {
        font-size: 1.2rem;
        padding: 10px 16px;
    }

    .demo-container {
        padding: 0 25px;
    }
    
    .demo-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
    

    .experts-simple-list li {
        margin-bottom: 12px;
        font-size: 1.05rem;
    }
    
    .expert-emoji {
        font-size: 1rem;
        margin-right: 6px;
        width: 18px;
    }

    .recipe-stages {
        flex-direction: column;
        gap: 20px;
    }
    
    .stage-connector {
        transform: rotate(90deg);
        font-size: 1.2rem;
        margin: 5px 0;
        align-self: center;
    }
    
    .recipe-stage-item {
        padding: 18px 12px;
    }
    
    .stage-indicator {
        width: 28px;
        height: 28px;
        font-size: 0.9rem;
    }
    
    .stage-info h4 {
        font-size: 1.05rem;
    }
    
    .stage-info p {
        font-size: 0.85rem;
    }

    .method-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .citation-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-info p {
        font-size: 1rem;
        line-height: 1.5;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 100px 0 60px;
        height: 100vh;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-description {
        font-size: 0.95rem;
    }

    .section-title {
        font-size: 1.8rem;
        gap: 10px;
    }
    
    .section-icon {
        font-size: 1.2rem;
        padding: 5px;
    }
    
    .subsection-title {
        font-size: 1.2rem;
        padding: 10px 16px;
    }
    
    .experts-title {
        font-size: 1.1rem;
        padding: 8px 14px;
    }

    .container {
        padding: 0 20px;
    }

    .navbar {
        padding: 15px 0;
    }

    .experts-simple-list li {
        margin-bottom: 10px;
        font-size: 1rem;
    }
    
    .expert-emoji {
        font-size: 0.9rem;
        margin-right: 5px;
        width: 16px;
    }

    .recipe-stages {
        gap: 15px;
    }
    
    .recipe-stage-item {
        padding: 15px 10px;
    }
    
    .stage-indicator {
        width: 24px;
        height: 24px;
        font-size: 0.8rem;
    }
    
    .stage-info h4 {
        font-size: 1rem;
    }
    
    .stage-info p {
        font-size: 0.8rem;
    }
    
    .stage-connector {
        font-size: 1rem;
    }

    .performance-card h3 {
        padding: 20px;
        font-size: 1.1rem;
    }
    
    .footer-info p {
        font-size: 0.9rem;
        line-height: 1.6;
    }
    
    .demo-container {
        padding: 0 20px;
    }
    
    .demo-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
}

/* Scroll Animations */