:root {
    --charcoal-bark: #1c1917;
    --birch-white: #faf6f1;
    --amber-signal: #d97706;
    --stone-gray: #78716c;
    --deep-walnut: #292524;
    --ash-light: #e7e5e4;
    --burnt-sienna: #ea580c;
    --warm-slate: #44403c;
    --grid-gutter: clamp(16px, 2.5vw, 40px);
}

/* Typography design terms retained: softens clinical feel pure geometric (like Mono" (Google Fonts Paragraphs gently (opacity Inter's x-height open apertures ensure readability dense analytical paragraphs. Inter" Interaction Details:* Details:** IntersectionObserver IntersectionObserver parallax IntersectionObserver (threshold carefully calibrated trio: face carries personality without eccentricity `clamp(3rem Grotesk" (Google Fonts */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Lato', Arial, sans-serif;
    font-weight: 400;
    color: var(--charcoal-bark);
    background: var(--birch-white);
    line-height: 1.72;
    font-size: clamp(0.95rem, 1.1vw, 1.1rem);
}

/* Navigation */
.top-bar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(250, 246, 241, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--ash-light);
}

.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px clamp(32px, 5vw, 80px);
    max-width: 1600px;
    margin: 0 auto;
}

.nav-wordmark {
    font-family: 'Space Grotesk', 'Inter', Arial, sans-serif;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--charcoal-bark);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-family: 'Inter', 'Lato', Arial, sans-serif;
    font-weight: 600;
    font-size: 13px;
    color: var(--stone-gray);
    text-decoration: none;
    transition: color 150ms;
}

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

/* Hero */
.hero {
    position: relative;
    height: 100vh;
    background: var(--charcoal-bark);
    overflow: hidden;
}

#network-topology {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.hero-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 2;
}

.hero-title {
    font-family: 'Space Grotesk', 'Inter', Arial, sans-serif;
    font-weight: 700;
    font-size: clamp(3rem, 6vw, 6rem);
    color: var(--birch-white);
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.hero-title .cursor {
    display: inline-block;
    color: var(--amber-signal);
    animation: blink 1s step-end infinite;
    transition: opacity 500ms;
}

.hero-title .cursor.fade-out {
    animation: none;
    opacity: 0;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-subtitle {
    font-family: 'Inter', 'Lato', Arial, sans-serif;
    font-weight: 400;
    font-size: 1rem;
    color: var(--stone-gray);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-top: 16px;
    opacity: 0;
    transition: opacity 800ms ease;
}

.hero-subtitle.visible {
    opacity: 1;
}

/* Section Labels */
.section-label {
    font-family: 'IBM Plex Mono', 'JetBrains Mono', 'Courier New', monospace;
    font-size: 11px;
    color: var(--stone-gray);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 32px;
}

/* Metrics Grid */
.metrics-grid {
    background: var(--birch-white);
    padding: clamp(80px, 12vh, 160px) clamp(32px, 5vw, 80px);
    position: relative;
}

.metrics-grid::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        repeating-linear-gradient(90deg, transparent, transparent calc(100% / 12 - 1px), var(--ash-light) calc(100% / 12 - 1px), var(--ash-light) calc(100% / 12)),
        repeating-linear-gradient(0deg, transparent, transparent 199px, var(--ash-light) 199px, var(--ash-light) 200px);
    opacity: 0.4;
    pointer-events: none;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--grid-gutter);
    position: relative;
    z-index: 1;
}

.metric-card {
    background: #fff;
    border: 1px solid var(--ash-light);
    padding: clamp(24px, 3vw, 48px);
    transition: border-color 150ms;
}

.metric-card:hover {
    border-color: var(--amber-signal);
}

.metric-card:hover .sparkline polyline {
    stroke-opacity: 1;
}

.metric-label {
    font-family: 'IBM Plex Mono', 'JetBrains Mono', 'Courier New', monospace;
    font-size: 11px;
    color: var(--stone-gray);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: 12px;
    min-height: 1.4em;
}

.metric-label .cursor {
    color: var(--amber-signal);
    animation: blink 1s step-end infinite;
}

.metric-value {
    font-family: 'Space Grotesk', 'Inter', Arial, sans-serif;
    font-weight: 500;
    font-size: clamp(2rem, 3vw, 3.5rem);
    color: var(--charcoal-bark);
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.sparkline {
    width: 120px;
    height: 32px;
    display: block;
    margin-bottom: 16px;
}

.sparkline polyline {
    stroke-opacity: 0.8;
    transition: stroke-opacity 150ms;
}

.metric-desc {
    font-family: 'Inter', 'Lato', Arial, sans-serif;
    font-size: 0.9rem;
    color: var(--warm-slate);
    line-height: 1.6;
}

/* Narrative Band */
.narrative-band {
    background: var(--charcoal-bark);
    color: var(--birch-white);
}

.narrative-inner {
    max-width: 680px;
    margin: 0 auto;
    padding: clamp(60px, 10vh, 120px) clamp(24px, 4vw, 48px);
}

.section-divider {
    text-align: center;
    margin-bottom: 48px;
    opacity: 0.5;
}

.narrative-heading {
    font-family: 'Space Grotesk', 'Inter', Arial, sans-serif;
    font-weight: 500;
    font-size: 2rem;
    letter-spacing: -0.02em;
    margin-bottom: 32px;
}

.narrative-inner p {
    font-family: 'Inter', 'Lato', Arial, sans-serif;
    font-size: 1.05rem;
    line-height: 1.75;
    color: rgba(250, 246, 241, 0.85);
    margin-bottom: 24px;
}

.fade-in {
    opacity: 0;
    transition: opacity 600ms ease;
}

.fade-in.visible {
    opacity: 1;
}

/* Comparison Matrix */
.comparison-matrix {
    background: var(--birch-white);
    padding: clamp(80px, 12vh, 160px) clamp(32px, 5vw, 80px);
    position: relative;
}

.comparison-matrix::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        repeating-linear-gradient(90deg, transparent, transparent calc(100% / 12 - 1px), var(--ash-light) calc(100% / 12 - 1px), var(--ash-light) calc(100% / 12)),
        repeating-linear-gradient(0deg, transparent, transparent 219px, var(--ash-light) 219px, var(--ash-light) 220px);
    opacity: 0.35;
    pointer-events: none;
}

.matrix-divider {
    position: relative;
    z-index: 1;
    text-align: center;
    margin-bottom: 32px;
    opacity: 0.7;
}

.protocol-card {
    background: var(--deep-walnut);
    border: 1px solid rgba(120, 113, 108, 0.2);
    padding: clamp(24px, 3vw, 48px);
    transition: border-color 150ms;
}

.protocol-card:hover {
    border-color: var(--amber-signal);
}

.protocol-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 8px;
}

.protocol-name {
    font-family: 'Space Grotesk', 'Inter', Arial, sans-serif;
    font-weight: 700;
    font-size: clamp(1.2rem, 2vw, 1.6rem);
    color: var(--birch-white);
    letter-spacing: -0.02em;
}

.protocol-type {
    font-family: 'IBM Plex Mono', 'JetBrains Mono', 'Courier New', monospace;
    font-size: 11px;
    color: var(--amber-signal);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.protocol-metrics {
    margin-bottom: 20px;
}

.protocol-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid rgba(120, 113, 108, 0.15);
}

.protocol-key {
    font-family: 'IBM Plex Mono', 'JetBrains Mono', 'Courier New', monospace;
    font-size: clamp(0.85rem, 1vw, 1rem);
    color: var(--stone-gray);
}

.protocol-val {
    font-family: 'IBM Plex Mono', 'JetBrains Mono', 'Courier New', monospace;
    font-size: clamp(0.85rem, 1vw, 1rem);
    color: var(--birch-white);
}

.bar-chart-container {
    margin-top: 16px;
}

.bar-label {
    font-family: 'IBM Plex Mono', 'JetBrains Mono', 'Courier New', monospace;
    font-size: 10px;
    color: var(--stone-gray);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}

.bar-track {
    height: 6px;
    background: var(--ash-light);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 4px;
}

.bar-fill {
    height: 100%;
    background: var(--amber-signal);
    border-radius: 3px;
    transition: width 800ms ease;
}

.bar-value {
    font-family: 'IBM Plex Mono', 'JetBrains Mono', 'Courier New', monospace;
    font-size: 11px;
    color: var(--stone-gray);
}

/* Footer */
.footer {
    position: relative;
    background: var(--charcoal-bark);
    padding: 48px clamp(32px, 5vw, 80px);
    overflow: hidden;
}

#footer-topology {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.3;
}

.footer-text {
    position: relative;
    z-index: 1;
    text-align: center;
    font-family: 'Inter', 'Lato', Arial, sans-serif;
    font-size: 12px;
    color: var(--stone-gray);
}

/* Responsive */
@media (max-width: 768px) {
    .grid-container {
        grid-template-columns: 1fr;
    }

    .metric-card,
    .protocol-card {
        grid-column: span 1 !important;
    }

    .nav-links {
        gap: 16px;
    }

    .nav-links a {
        font-size: 12px;
    }
}