:root {
    /* Color Palette - Medical Trust & Open Source */
    --primary-color: #008080;
    /* Teal - Trust, Health */
    --primary-dark: #005f5f;
    --secondary-color: #0047AB;
    /* Cobalt Blue - Professionalism */
    --accent-color: #40E0D0;
    /* Turquoise - Modern, Fresh */
    --text-color: #333333;
    --text-light: #666666;
    --background-light: #F5F9FA;
    /* Very light teal tint */
    --white: #FFFFFF;
    --error-color: #D32F2F;
    --success-color: #388E3C;

    /* Typography */
    --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.5;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Transitions */
    --transition-speed: 0.3s;
}

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

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--text-color);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed);
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 128, 128, 0.2);
}

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

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

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

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

/* Typography Utilities */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 3.5rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.75rem;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-light);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.social-icon {
    width: 24px;
    height: 24px;
    fill: var(--text-color);
    transition: fill 0.3s ease;
}

.social-icon:hover {
    fill: var(--primary-color);
}

/* Header */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.nav-links a {
    font-weight: 500;
    color: var(--text-color);
}

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

/* Hero Section */
.hero {
    padding-top: 160px;
    padding-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, var(--background-light) 0%, #E0F2F1 100%);
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero h1 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-md);
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

/* Constellation Section */
.constellation {
    background-color: var(--white);
}

.constellation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.agent-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: transform var(--transition-speed);
    border: 1px solid #eee;
    text-align: center;
}

.agent-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
}

.agent-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

/* Safety Section */
.safety {
    background-color: var(--secondary-color);
    color: var(--white);
}

.safety h2 {
    color: var(--white);
}

.safety p {
    color: rgba(255, 255, 255, 0.8);
}

.safety-features {
    display: flex;
    justify-content: space-around;
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.safety-item {
    flex: 1;
    min-width: 300px;
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    backdrop-filter: blur(5px);
}

/* Footer */
footer {
    background-color: #1a1a1a;
    color: var(--white);
    padding: var(--spacing-lg) 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.footer-col h4 {
    color: var(--white);
    margin-bottom: var(--spacing-sm);
}

.footer-col ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-col a {
    color: #999;
}

.footer-col a:hover {
    color: var(--white);
}

.copyright {
    margin-top: var(--spacing-lg);
    text-align: center;
    color: #666;
    border-top: 1px solid #333;
    padding-top: var(--spacing-md);
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    .nav-links {
        display: none;
        /* Simple mobile hide for now */
    }

    .hero {
        padding-top: 120px;
    }
}

/* Safety Page Specifics */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.stat-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    text-align: center;
    border-top: 4px solid var(--primary-color);
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    color: var(--text-light);
    font-weight: 500;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: var(--spacing-lg) auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background: var(--primary-color);
    transform: translateX(-50%);
}

.timeline-item {
    padding: var(--spacing-md);
    position: relative;
    width: 50%;
    box-sizing: border-box;
}

.timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
    padding-right: 40px;
}

.timeline-item:nth-child(even) {
    left: 50%;
    padding-left: 40px;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--white);
    border: 4px solid var(--primary-color);
    border-radius: 50%;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1;
}

.timeline-item:nth-child(odd)::after {
    right: -10px;
}

.timeline-item:nth-child(even)::after {
    left: -10px;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing-md);
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.comparison-table th,
.comparison-table td {
    padding: var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid #eee;
}

.comparison-table th {
    background-color: var(--primary-color);
    color: var(--white);
}

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

/* Agents Page Specifics */
.agent-category {
    margin-bottom: var(--spacing-lg);
}

.agent-category h2 {
    color: var(--secondary-color);
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    display: inline-block;
}

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

.agent-item {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    border: 1px solid #eee;
    transition: all var(--transition-speed);
}

.agent-item:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.agent-item h3 {
    font-size: 1.25rem;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-xs);
}

.specialized-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.problem-solution-card {
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
}

.ps-header {
    background: var(--secondary-color);
    color: var(--white);
    padding: var(--spacing-md);
}

.ps-header h3 {
    margin: 0;
    font-size: 1.4rem;
}

.ps-body {
    padding: var(--spacing-md);
    flex-grow: 1;
}

.ps-problem {
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px dashed #eee;
}

.ps-label {
    text-transform: uppercase;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--text-light);
    display: block;
    margin-bottom: 0.25rem;
}

.ps-problem .ps-label {
    color: var(--error-color);
}

.ps-solution .ps-label {
    color: var(--success-color);
}

/* Open Source Page Specifics */
.contributor-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.contributor-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 16px;
    border: 1px solid #eee;
    text-align: center;
    transition: transform var(--transition-speed);
}

.contributor-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.step-list {
    counter-reset: step-counter;
    list-style: none;
    max-width: 800px;
    margin: 0 auto;
}

.step-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: var(--spacing-md);
}

.step-item::before {
    counter-increment: step-counter;
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    text-align: center;
    line-height: 40px;
    font-weight: 700;
}

.step-item h3 {
    margin-bottom: var(--spacing-xs);
}

.community-stats {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--white);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

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

.stat-box strong {
    display: block;
    font-size: 2.5rem;
    color: var(--secondary-color);
}

/* Research Page Specifics */
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.research-track-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    border-left: 4px solid var(--secondary-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.research-track-card h3 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-xs);
}

.collab-opportunities {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.collab-card {
    background: var(--background-light);
    padding: var(--spacing-md);
    border-radius: 12px;
    text-align: center;
}

.collab-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    display: block;
}

/* Architecture Page Specifics */
.arch-diagram-container {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    margin-bottom: var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

.layer-box {
    border: 2px solid #eee;
    border-radius: 12px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    position: relative;
    background: #fafafa;
    transition: all var(--transition-speed);
}

.layer-box:hover {
    border-color: var(--primary-color);
    background: var(--white);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.layer-title {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.layer-content {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
}

.component-node {
    background: var(--white);
    border: 1px solid var(--accent-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    font-weight: 600;
    color: var(--secondary-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.tech-stack-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.tech-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    border: 1px solid #eee;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.deep-dive-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 16px;
    border: 1px solid #eee;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.feature-card h3 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
}

```