/* ============================================
   Systemic Dignity Infrastructure Website
   Design Philosophy: Institutional Authority with Technical Precision
   Colors: Deep Navy (#1a3a52) + Warm Amber (#d97706)
   ============================================ */

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

:root {
    --primary: #1a3a52;
    --primary-light: #2d5a7b;
    --primary-dark: #0f2438;
    --accent: #d97706;
    --accent-light: #f59e0b;
    --accent-dark: #b45309;
    --background: #f9fafb;
    --surface: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border: #e5e7eb;
    --border-light: #f3f4f6;
    --success: #10b981;
    --error: #ef4444;
    
    --font-serif: 'Georgia', 'Garamond', serif;
    --font-sans: 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    
    --transition: all 0.3s ease;
    --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);
}

html {
    scroll-behavior: smooth;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2.25rem;
    letter-spacing: -0.01em;
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

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

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

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

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

@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
}

/* Navigation Header */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
}

.logo {
    width: 2rem;
    height: 2rem;
    background-color: var(--primary);
    color: var(--surface);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.5rem;
    font-family: var(--font-serif);
    font-size: 0.875rem;
    font-weight: 700;
}

.brand-text {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    color: var(--primary);
    display: none;
}

@media (min-width: 768px) {
    .brand-text {
        display: inline;
    }
}

.navbar-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: var(--transition);
}

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

@media (max-width: 768px) {
    .navbar-container {
        padding: 0.75rem 1rem;
    }
    
    .navbar-links {
        gap: 1rem;
        font-size: 0.75rem;
    }
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 0.95rem;
}

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

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

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

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

.btn-secondary {
    background-color: var(--accent);
    color: var(--surface);
    border-color: var(--accent);
}

.btn-secondary:hover {
    background-color: var(--accent-dark);
    border-color: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary-alt {
    background-color: transparent;
    color: var(--surface);
    border-color: var(--surface);
}

.btn-secondary-alt:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: var(--surface);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--background) 0%, var(--border-light) 100%);
    padding: 6rem 2rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(45deg, var(--primary) 1px, transparent 1px),
        linear-gradient(-45deg, var(--primary) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.03;
    pointer-events: none;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.badge {
    display: inline-block;
    background-color: rgba(217, 119, 6, 0.1);
    color: var(--accent);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(217, 119, 6, 0.2);
}

.hero h1 {
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

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

@media (max-width: 768px) {
    .hero {
        padding: 4rem 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

/* Architecture Section */
.architecture {
    padding: 6rem 2rem;
    background-color: var(--surface);
}

.architecture .container {
    max-width: 1200px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 3rem;
}

.architecture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.architecture-card {
    background-color: var(--surface);
    border: 2px solid var(--border);
    border-radius: 0.75rem;
    padding: 2rem;
    transition: var(--transition);
}

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

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: inline-block;
}

.card-subtitle {
    color: var(--accent);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.card-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.card-features {
    list-style: none;
    space-y: 0.5rem;
}

.card-features li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.card-features li::before {
    color: var(--success);
    font-weight: bold;
    margin-right: 0.5rem;
}

/* Concepts Section */
.concepts {
    padding: 6rem 2rem;
    background-color: var(--border-light);
}

.concepts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.concept-item {
    background-color: var(--surface);
    padding: 2rem;
    border-radius: 0.75rem;
    border-left: 4px solid var(--accent);
}

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

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

/* Metrics Section */
.metrics {
    padding: 6rem 2rem;
    background-color: var(--surface);
}

.metrics-list {
    display: grid;
    gap: 1rem;
}

.metric-item {
    background-color: var(--border-light);
    border-left: 4px solid var(--accent);
    padding: 1.5rem;
    border-radius: 0.5rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 768px) {
    .metric-item {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

.metric-left h4 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.metric-threshold {
    color: var(--accent);
    font-weight: 700;
    font-size: 1.125rem;
}

.metric-right {
    text-align: right;
}

@media (max-width: 768px) {
    .metric-right {
        text-align: left;
    }
}

.metric-failure {
    color: var(--error);
    font-size: 0.875rem;
    font-weight: 600;
}

/* Governance Section */
.governance {
    padding: 6rem 2rem;
    background-color: var(--border-light);
}

.governance-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
}

.governance-item {
    background-color: var(--surface);
    padding: 2rem;
    border-radius: 0.75rem;
}

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

.governance-item p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.7;
}

.contributor-list {
    list-style: none;
    margin: 1.5rem 0;
    padding-left: 0;
}

.contributor-list li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.contributor-list li::before {
    content: '•';
    color: var(--accent);
    font-weight: bold;
    position: absolute;
    left: 0;
}

.link-button {
    display: inline-block;
    color: var(--accent);
    font-weight: 600;
    margin-top: 1rem;
    transition: var(--transition);
}

.link-button:hover {
    color: var(--accent-dark);
    transform: translateX(4px);
}

/* CTA Section */
.cta {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--surface);
    padding: 6rem 2rem;
    text-align: center;
}

.cta h2 {
    color: var(--surface);
    margin-bottom: 1rem;
}

.cta p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .cta-buttons {
        flex-direction: column;
    }
    
    .cta .btn {
        width: 100%;
    }
}

/* Footer */
.footer {
    background-color: var(--primary-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 4rem 2rem 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: var(--surface);
    margin-bottom: 1rem;
    font-family: var(--font-serif);
}

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

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

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
    margin: 0;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
}

.footer-bottom a:hover {
    color: var(--accent);
}

@media (max-width: 768px) {
    .footer-bottom {
        justify-content: center;
        text-align: center;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.pt-1 { padding-top: 0.5rem; }
.pt-2 { padding-top: 1rem; }
.pt-3 { padding-top: 1.5rem; }
.pt-4 { padding-top: 2rem; }

.pb-1 { padding-bottom: 0.5rem; }
.pb-2 { padding-bottom: 1rem; }
.pb-3 { padding-bottom: 1.5rem; }
.pb-4 { padding-bottom: 2rem; }

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .architecture-grid {
        grid-template-columns: 1fr;
    }
    
    .concepts-grid {
        grid-template-columns: 1fr;
    }
    
    .governance-grid {
        grid-template-columns: 1fr;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .cta-buttons,
    .hero-buttons {
        display: none;
    }
}