:root {
    /* Color Palette */
    --color-bg-base: #0a0d12;
    --color-surface: #121820;
    --color-border: #1f2937;
    --color-text-primary: #e5e7eb;
    --color-text-secondary: #9ca3af;
    --color-accent-primary: #10b981; /* Verification emerald */
    --color-accent-alt: #06b6d4; /* Telemetry cyan */
    --color-alert: #f59e0b; /* Discrepancy Accent */

    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, monospace;

    /* Layout & Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
    --container-max: 1200px;
}

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

body {
    background-color: var(--color-bg-base);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--color-text-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.mono-accent {
    font-family: var(--font-mono);
    color: var(--color-accent-alt);
    font-size: 0.9em;
}

.section-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: var(--spacing-sm);
    font-weight: 600;
}

/* Header & Nav */
.site-header {
    background-color: rgba(10, 13, 18, 0.9);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    letter-spacing: 0.05em;
}

.main-nav {
    display: flex;
    gap: var(--spacing-lg);
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
    }
}

.system-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-accent-primary);
    background: rgba(16, 185, 129, 0.1);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background-color: var(--color-accent-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 1; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { opacity: 0.5; box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
    100% { opacity: 1; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

@media (max-width: 1024px) {
    .system-status .status-text {
        display: none;
    }
}

/* Hero Section */
.hero {
    padding: 6rem 0;
    text-align: left;
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
    font-weight: 700;
    color: #ffffff;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    max-width: 800px;
    margin-bottom: var(--spacing-xl);
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.btn-primary {
    background-color: var(--color-accent-primary);
    color: #000000;
    border: 1px solid var(--color-accent-primary);
}

.btn-primary:hover {
    background-color: #0e9f6e;
    color: #000000;
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

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

/* Core Tenets Grid */
.core-tenets {
    padding: var(--spacing-xl) 0;
}

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

.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: var(--spacing-lg);
    border-radius: 6px;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent-primary);
}

.card h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
    font-size: 1.25rem;
}

.card p {
    color: var(--color-text-secondary);
}

/* Interactive Matrix */
.research-initiatives {
    padding: var(--spacing-xl) 0;
}

.interactive-matrix {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-lg);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    overflow: hidden;
}

@media (max-width: 768px) {
    .interactive-matrix {
        grid-template-columns: 1fr;
    }
}

.matrix-tabs {
    display: flex;
    flex-direction: column;
    background-color: rgba(0,0,0,0.2);
    border-right: 1px solid var(--color-border);
}

@media (max-width: 768px) {
    .matrix-tabs {
        flex-direction: row;
        border-right: none;
        border-bottom: 1px solid var(--color-border);
        overflow-x: auto;
    }
}

.tab-btn {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    font-family: var(--font-sans);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

@media (max-width: 768px) {
    .tab-btn {
        border-left: none;
        border-bottom: 3px solid transparent;
        white-space: nowrap;
    }
}

.tab-btn:hover {
    color: var(--color-text-primary);
    background-color: rgba(255,255,255,0.02);
}

.tab-btn.active {
    color: var(--color-accent-primary);
    border-left-color: var(--color-accent-primary);
    background-color: rgba(16, 185, 129, 0.05);
}

@media (max-width: 768px) {
    .tab-btn.active {
        border-left-color: transparent;
        border-bottom-color: var(--color-accent-primary);
    }
}

.matrix-panels {
    padding: var(--spacing-xl);
}

.panel h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

.panel p {
    color: var(--color-text-secondary);
    max-width: 600px;
}

/* Terminal Mock */
.live-console {
    padding: var(--spacing-xl) 0 6rem;
}

.terminal-mock {
    background-color: #050608;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    overflow: hidden;
    font-family: var(--font-mono);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.terminal-header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 8px;
}

.terminal-header .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--color-border);
}

.terminal-header .dot:nth-child(1) { background-color: #ef4444; }
.terminal-header .dot:nth-child(2) { background-color: #f59e0b; }
.terminal-header .dot:nth-child(3) { background-color: #10b981; }

.terminal-title {
    margin-left: auto;
    margin-right: auto;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

.terminal-body {
    padding: var(--spacing-md);
    height: 300px;
    overflow-y: auto;
    font-size: 0.85rem;
    color: var(--color-accent-alt);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.log-line {
    opacity: 0;
    animation: fadeIn 0.1s forwards;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

.log-success { color: var(--color-accent-primary); }
.log-warning { color: var(--color-alert); }
.log-error { color: #ef4444; }
.log-muted { color: var(--color-text-secondary); }

/* Footer */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
    background-color: var(--color-surface);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-legal p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.9rem;
}