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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --background: #ffffff;
    --background-alt: #f8fafc;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Playfair Display', serif;
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h2 {
    color: var(--primary-color);
    margin: 0;
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
}

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

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.1;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #ffffff, #e0e7ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    display: block;
    font-size: 1.5rem;
    margin-top: 0.5rem;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    color: #e0e7ff;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #fbbf24;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.75rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: 2px solid transparent;
}

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

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

.btn-secondary {
    background: transparent;
    color: white;
    border-color: white;
}

.btn-secondary:hover {
    background: white;
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* Syllogism Example */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.syllogism-example {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    max-width: 400px;
}

.premise, .conclusion {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    border-left: 4px solid #fbbf24;
}

.premise-label, .conclusion-label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #fbbf24;
}

.premise-text, .conclusion-text {
    color: white;
    font-size: 0.9rem;
}

.validity-badge {
    display: inline-block;
    background: var(--success-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-top: 0.5rem;
}

/* Section Styles */
section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* Abstract Section */
.abstract {
    background: var(--background-alt);
}

.abstract-text {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.key-contributions {
    margin-top: 3rem;
}

.key-contributions h3 {
    text-align: center;
    margin-bottom: 2rem;
}

.contributions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.contribution-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contribution-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.contribution-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.contribution-item h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Dataset Section */
.dataset-description {
    margin-bottom: 3rem;
    text-align: center;
}

.example-section {
    margin-bottom: 3rem;
}

.example-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.example-image {
    width: 100%;
    height: auto;
    border-radius: 10px;
}

.categories-section {
    margin-top: 3rem;
}

.categories-visual {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    align-items: center;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.categories-image {
    width: 100%;
    height: auto;
    border-radius: 10px;
}

/* Results Section */
.results {
    background: var(--background-alt);
}

.results-overview {
    margin-bottom: 4rem;
}

.performance-table {
    overflow-x: auto;
    background: white;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.performance-table table {
    width: 100%;
    border-collapse: collapse;
}

.performance-table th,
.performance-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.performance-table th {
    background: var(--primary-color);
    color: white;
    font-weight: 600;
}

.performance-table .top-performer {
    background: rgba(37, 99, 235, 0.1);
    font-weight: 600;
}

.prompt-analysis {
    margin-top: 4rem;
}

.prompt-charts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.chart-container {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.chart-container h4 {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.chart-image {
    width: 100%;
    height: auto;
    border-radius: 10px;
}

.prompt-insights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.insight-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-color);
}

.insight-item h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Findings Section */
.findings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.finding-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
}

.finding-item:hover {
    transform: translateY(-5px);
}

.finding-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.finding-item h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Resources Section */
.resources {
    background: var(--background-alt);
}

.resource-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.resource-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    text-align: center;
}

.resource-item h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.resource-link {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

.resource-link:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.citation {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.citation-box {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.5rem;
    overflow-x: auto;
}

.citation-box code {
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.contact {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: white;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

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

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-stats {
        justify-content: center;
    }

    .example-container,
    .categories-visual {
        grid-template-columns: 1fr;
    }

    .prompt-charts {
        grid-template-columns: 1fr;
    }

    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }

    .container {
        padding: 0 1rem;
    }

    section {
        padding: 3rem 0;
    }
}

/* Image styling - ensure visibility */
img {
    max-width: 100%;
    height: auto;
    display: block;
    opacity: 1 !important;
    transition: opacity 0.3s ease;
}

.example-image, .categories-image, .chart-image {
    width: 100%;
    height: auto;
    border-radius: 10px;
    opacity: 1 !important;
    visibility: visible !important;
}

/* Hero title animation */
.hero-title {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 1s ease, transform 1s ease;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Loading animation for stats */
@keyframes countUp {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading animation for stats */
@keyframes countUp {
    from { opacity: 0; }
    to { opacity: 1; }
}