/* ==========================================================================
   PETER PRIKASKY — 16-BIT RELAY COMPUTER SHOWCASE
   SOBER LABORATORY DESIGN SYSTEM (WCAG AAA COMPLIANT)
   ========================================================================== */

:root {
  --rc-bg: #080c14;
  --rc-surface: #0f172a;
  --rc-surface-alt: #131c31;
  --rc-surface-highlight: #1e293b;
  --rc-border: #1e293b;
  --rc-border-bright: #334155;
  --rc-border-hover: #38bdf8;
  
  --rc-text-primary: #f8fafc;
  --rc-text-secondary: #cbd5e1; /* 11.8:1 contrast on #080c14 (WCAG AAA) */
  --rc-text-muted: #94a3b8;     /* 7.4:1 contrast on #080c14 (WCAG AAA) */
  
  --rc-accent-cyan: #38bdf8;
  --rc-accent-cyan-glow: rgba(56, 189, 248, 0.2);
  --rc-accent-amber: #f59e0b;
  --rc-accent-amber-glow: rgba(245, 158, 11, 0.2);
  --rc-accent-green: #10b981;
  --rc-accent-green-glow: rgba(16, 185, 129, 0.2);
  --rc-accent-purple: #a855f7;
  
  --rc-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --rc-font-mono: 'Fira Code', 'JetBrains Mono', monospace;
  --rc-font-display: 'Orbitron', var(--rc-font-sans);
  
  --rc-radius-sm: 4px;
  --rc-radius-md: 8px;
  --rc-radius-lg: 12px;
  --rc-radius-xl: 16px;
  
  --rc-transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Accessibility: Skip Link */
.skip-link {
  position: absolute;
  top: -999px;
  left: 1rem;
  background: var(--rc-accent-cyan);
  color: #080c14;
  font-weight: 700;
  padding: 0.75rem 1.25rem;
  border-radius: var(--rc-radius-sm);
  z-index: 10000;
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 1rem;
  outline: 3px solid #ffffff;
  outline-offset: 2px;
}

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  overflow-x: hidden;
  max-width: 100vw;
}

body {
  background-color: var(--rc-bg);
  color: var(--rc-text-primary);
  font-family: var(--rc-font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
  overflow-x: hidden;
  max-width: 100vw;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.08) 0%, transparent 60%),
    radial-gradient(circle at 85% 30%, rgba(245, 158, 11, 0.05) 0%, transparent 50%),
    linear-gradient(to bottom, transparent, rgba(8, 12, 20, 0.98)),
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 100% 100%, 48px 48px, 48px 48px;
}

/* Global Focus Styles */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--rc-accent-cyan) !important;
  outline-offset: 3px !important;
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  background: rgba(8, 12, 20, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rc-border);
}

.nav-container {
  max-width: 1380px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--rc-text-primary);
  flex-shrink: 0;
}

.brand-logo-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #1e293b, #0f172a);
  border: 1px solid var(--rc-accent-amber);
  border-radius: var(--rc-radius-md);
  box-shadow: 0 0 12px var(--rc-accent-amber-glow);
  font-family: var(--rc-font-display);
  font-weight: 800;
  font-size: 1rem;
  color: var(--rc-accent-amber);
  flex-shrink: 0;
}

.brand-meta {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--rc-font-display);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--rc-text-primary);
  white-space: nowrap;
}

.brand-subtitle {
  font-family: var(--rc-font-mono);
  font-size: 0.7rem;
  color: var(--rc-accent-cyan);
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(0.3rem, 0.75vw, 0.9rem);
  list-style: none;
}

.nav-mobile-item {
  display: none;
}

.nav-link {
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--rc-text-secondary);
  transition: var(--rc-transition);
  padding: 0.35rem 0.5rem;
  border-radius: var(--rc-radius-sm);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--rc-accent-cyan);
  background: rgba(56, 189, 248, 0.08);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}

.lang-switch {
  display: inline-flex;
  background: var(--rc-surface);
  border: 1px solid var(--rc-border-bright);
  border-radius: var(--rc-radius-md);
  padding: 2px;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--rc-text-muted);
  font-family: var(--rc-font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--rc-radius-sm);
  cursor: pointer;
  transition: var(--rc-transition);
}

.lang-btn.active {
  background: var(--rc-accent-cyan);
  color: #080c14;
}

.btn-relay-sound {
  background: var(--rc-surface-alt);
  border: 1px solid var(--rc-accent-amber);
  color: var(--rc-accent-amber);
  font-family: var(--rc-font-mono);
  font-size: 0.78rem;
  padding: 6px 12px;
  border-radius: var(--rc-radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--rc-transition);
}

.btn-relay-sound:hover {
  background: var(--rc-accent-amber);
  color: #080c14;
  box-shadow: 0 0 14px var(--rc-accent-amber-glow);
}

.btn-time-travel {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid var(--rc-accent-amber);
  color: var(--rc-accent-amber);
  font-family: var(--rc-font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: var(--rc-radius-md);
  text-decoration: none;
  transition: var(--rc-transition);
}

.btn-time-travel:hover {
  background: var(--rc-accent-amber);
  color: #080c14;
  box-shadow: 0 0 16px var(--rc-accent-amber-glow);
  transform: translateY(-2px);
}

.btn-time-travel .tt-icon {
  font-size: 0.9rem;
}

.btn-time-travel .tt-arrow {
  color: var(--rc-accent-cyan);
  transition: transform 0.2s ease;
}

.btn-time-travel:hover .tt-arrow {
  transform: translate(2px, -2px);
  color: #080c14;
}

.nav-toggle-btn {
  display: none;
  background: var(--rc-surface-alt);
  border: 1px solid var(--rc-border-bright);
  color: var(--rc-text-primary);
  padding: 6px 10px;
  border-radius: var(--rc-radius-md);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: var(--rc-transition);
  flex-shrink: 0;
}

.nav-toggle-btn:hover {
  border-color: var(--rc-accent-cyan);
  color: var(--rc-accent-cyan);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  padding: 4rem 1.5rem 3rem;
  max-width: 1380px;
  margin: 0 auto;
  width: 100%;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--rc-font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--rc-radius-sm);
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--rc-border-bright);
  color: var(--rc-text-secondary);
}

.chip.chip-cyan {
  border-color: var(--rc-accent-cyan);
  color: var(--rc-accent-cyan);
  background: rgba(56, 189, 248, 0.08);
}

.chip.chip-amber {
  border-color: var(--rc-accent-amber);
  color: var(--rc-accent-amber);
  background: rgba(245, 158, 11, 0.08);
}

.chip.chip-green {
  border-color: var(--rc-accent-green);
  color: var(--rc-accent-green);
  background: rgba(16, 185, 129, 0.08);
}

.chip-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  display: inline-block;
  box-shadow: 0 0 6px currentColor;
}

.hero-title {
  font-family: var(--rc-font-display);
  font-size: clamp(1.85rem, 3.4vw, 2.85rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: #ffffff;
  hyphens: auto;
  word-break: break-word;
}

.hero-title .highlight-cyan {
  color: var(--rc-accent-cyan);
  text-shadow: 0 0 24px var(--rc-accent-cyan-glow);
}

.hero-title .highlight-amber {
  color: var(--rc-accent-amber);
  text-shadow: 0 0 24px var(--rc-accent-amber-glow);
}

.hero-description {
  font-size: 1.15rem;
  color: var(--rc-text-secondary);
  line-height: 1.7;
}

.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  background: var(--rc-surface);
  border: 1px solid var(--rc-border);
  border-radius: var(--rc-radius-lg);
  padding: 1.25rem;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-val {
  font-family: var(--rc-font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--rc-text-primary);
}

.stat-label {
  font-family: var(--rc-font-mono);
  font-size: 0.72rem;
  color: var(--rc-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 2px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.85rem 1.6rem;
  border-radius: var(--rc-radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: var(--rc-transition);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--rc-accent-cyan);
  color: #080c14;
  font-weight: 700;
}

.btn-primary:hover {
  background: #7dd3fc;
  box-shadow: 0 0 20px var(--rc-accent-cyan-glow);
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  border-color: var(--rc-accent-cyan);
  background: var(--rc-surface-alt);
  color: var(--rc-accent-cyan);
  transform: translateY(-2px);
}

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

.btn-amber:hover {
  background: var(--rc-accent-amber);
  color: #080c14;
  box-shadow: 0 0 20px var(--rc-accent-amber-glow);
  transform: translateY(-2px);
}

/* Hero Media Card */
.hero-media-card {
  position: relative;
  background: var(--rc-surface);
  border: 1px solid var(--rc-border-bright);
  border-radius: var(--rc-radius-xl);
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  transition: var(--rc-transition);
}

.hero-media-card:hover {
  border-color: var(--rc-accent-cyan);
  box-shadow: 0 24px 48px rgba(56, 189, 248, 0.15);
}

.hero-media-img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.hero-media-card:hover .hero-media-img {
  transform: scale(1.02);
}

.hero-media-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(8, 12, 20, 0.95), transparent);
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.hero-media-caption {
  font-family: var(--rc-font-mono);
  font-size: 0.82rem;
  color: var(--rc-text-secondary);
}

.hero-media-caption strong {
  display: block;
  color: var(--rc-accent-amber);
  font-size: 0.95rem;
  font-family: var(--rc-font-display);
}

.badge-live-pulse {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid var(--rc-accent-green);
  color: var(--rc-accent-green);
  font-family: var(--rc-font-mono);
  font-size: 0.7rem;
  padding: 4px 8px;
  border-radius: var(--rc-radius-sm);
}

/* ==========================================================================
   SECTION COMMON
   ========================================================================== */
.section {
  padding: 5rem 1.5rem;
  max-width: 1380px;
  margin: 0 auto;
  width: 100%;
}

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

.section-tag {
  font-family: var(--rc-font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--rc-accent-cyan);
  display: block;
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: var(--rc-font-display);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--rc-text-primary);
  margin-bottom: 0.75rem;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--rc-text-secondary);
  max-width: 800px;
  line-height: 1.7;
}

/* ==========================================================================
   INTERACTIVE MODULE EXPLORER
   ========================================================================== */
.module-explorer-grid {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 2rem;
  background: var(--rc-surface);
  border: 1px solid var(--rc-border);
  border-radius: var(--rc-radius-xl);
  overflow: hidden;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.module-nav-list {
  background: var(--rc-surface-alt);
  border-right: 1px solid var(--rc-border);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 720px;
  overflow-y: auto;
}

.module-nav-btn {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  width: 100%;
  padding: 0.85rem 1rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--rc-radius-md);
  color: var(--rc-text-secondary);
  text-align: left;
  cursor: pointer;
  transition: var(--rc-transition);
}

.module-nav-btn:hover {
  background: rgba(56, 189, 248, 0.06);
  color: var(--rc-text-primary);
  border-color: rgba(56, 189, 248, 0.2);
}

.module-nav-btn.active {
  background: rgba(56, 189, 248, 0.12);
  border-color: var(--rc-accent-cyan);
  color: var(--rc-accent-cyan);
  box-shadow: 0 0 12px var(--rc-accent-cyan-glow);
}

.module-nav-icon {
  font-family: var(--rc-font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--rc-surface);
  border-radius: var(--rc-radius-sm);
  border: 1px solid var(--rc-border-bright);
}

.module-nav-btn.active .module-nav-icon {
  background: var(--rc-accent-cyan);
  color: #080c14;
  border-color: var(--rc-accent-cyan);
}

.module-nav-text {
  display: flex;
  flex-direction: column;
}

.module-nav-title {
  font-weight: 600;
  font-size: 0.9rem;
}

.module-nav-sub {
  font-family: var(--rc-font-mono);
  font-size: 0.72rem;
  color: var(--rc-text-muted);
}

.module-display-pane {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.module-media-container {
  position: relative;
  border-radius: var(--rc-radius-lg);
  overflow: hidden;
  border: 1px solid var(--rc-border-bright);
  background: #000;
  max-height: 420px;
}

.module-main-image {
  width: 100%;
  height: 420px;
  object-fit: cover;
  display: block;
  cursor: zoom-in;
  transition: transform 0.3s ease;
}

.module-main-image:hover {
  transform: scale(1.015);
}

.module-zoom-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(8, 12, 20, 0.75);
  backdrop-filter: blur(8px);
  border: 1px solid var(--rc-border-bright);
  color: var(--rc-text-secondary);
  font-family: var(--rc-font-mono);
  font-size: 0.75rem;
  padding: 4px 8px;
  border-radius: var(--rc-radius-sm);
  display: flex;
  align-items: center;
  gap: 4px;
}

.module-details-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
}

.module-narrative h3 {
  font-family: var(--rc-font-display);
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
  color: var(--rc-text-primary);
}

.module-narrative p {
  color: var(--rc-text-secondary);
  line-height: 1.7;
  font-size: 0.95rem;
}

.module-specs-card {
  background: var(--rc-surface-alt);
  border: 1px solid var(--rc-border-bright);
  border-radius: var(--rc-radius-md);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.spec-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.spec-key {
  font-family: var(--rc-font-mono);
  font-size: 0.76rem;
  color: var(--rc-text-muted);
}

.spec-val {
  font-family: var(--rc-font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--rc-accent-cyan);
}

/* ==========================================================================
   ARCHITECTURE SECTION
   ========================================================================== */
.arch-diagram-card {
  background: var(--rc-surface);
  border: 1px solid var(--rc-border);
  border-radius: var(--rc-radius-xl);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.arch-img-wrap {
  width: 100%;
  border-radius: var(--rc-radius-lg);
  overflow: hidden;
  border: 1px solid var(--rc-border-bright);
  background: #000;
  cursor: zoom-in;
}

.arch-diagram-img {
  width: 100%;
  height: auto;
  display: block;
}

.arch-pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.pillar-card {
  background: var(--rc-surface-alt);
  border: 1px solid var(--rc-border);
  border-radius: var(--rc-radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: var(--rc-transition);
}

.pillar-card:hover {
  border-color: var(--rc-accent-cyan);
  transform: translateY(-3px);
}

.pillar-icon {
  font-family: var(--rc-font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--rc-accent-amber);
}

.pillar-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--rc-text-primary);
}

.pillar-desc {
  font-size: 0.9rem;
  color: var(--rc-text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   SOFTWARE & ALGORITHMS SECTION
   ========================================================================== */
.algo-terminal-card {
  background: var(--rc-surface);
  border: 1px solid var(--rc-border-bright);
  border-radius: var(--rc-radius-xl);
  overflow: hidden;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.5);
}

.algo-tabs-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--rc-surface-alt);
  border-bottom: 1px solid var(--rc-border);
  padding: 0.5rem 1rem;
  overflow-x: auto;
}

.algo-tabs-list {
  display: flex;
  gap: 0.5rem;
}

.algo-tab-btn {
  background: transparent;
  border: 1px solid transparent;
  padding: 0.5rem 0.9rem;
  border-radius: var(--rc-radius-sm);
  color: var(--rc-text-muted);
  font-family: var(--rc-font-mono);
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--rc-transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.algo-tab-btn:hover {
  color: var(--rc-text-primary);
  background: rgba(255, 255, 255, 0.03);
}

.algo-tab-btn.active {
  background: var(--rc-surface);
  color: var(--rc-accent-cyan);
  border-color: var(--rc-border-bright);
  font-weight: 600;
}

.algo-content-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  min-height: 480px;
}

.algo-info-pane {
  padding: 2rem;
  border-right: 1px solid var(--rc-border);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.algo-info-title {
  font-family: var(--rc-font-display);
  font-size: 1.35rem;
  color: var(--rc-text-primary);
}

.algo-info-desc {
  font-size: 0.95rem;
  color: var(--rc-text-secondary);
  line-height: 1.7;
}

.algo-stats-box {
  background: var(--rc-surface-alt);
  border: 1px solid var(--rc-border);
  border-radius: var(--rc-radius-md);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.algo-actions-row {
  display: flex;
  gap: 0.75rem;
  margin-top: auto;
}

.algo-code-pane {
  background: #04070e;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.algo-code-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 0.75rem;
}

.code-lang-label {
  font-family: var(--rc-font-mono);
  font-size: 0.72rem;
  color: var(--rc-text-muted);
}

.btn-copy-code {
  background: var(--rc-surface-alt);
  border: 1px solid var(--rc-border-bright);
  color: var(--rc-text-secondary);
  font-family: var(--rc-font-mono);
  font-size: 0.75rem;
  padding: 3px 8px;
  border-radius: var(--rc-radius-sm);
  cursor: pointer;
  transition: var(--rc-transition);
}

.btn-copy-code:hover {
  color: var(--rc-accent-cyan);
  border-color: var(--rc-accent-cyan);
}

.algo-code-block {
  font-family: var(--rc-font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  color: #a5b4fc;
  overflow: auto;
  max-height: 420px;
  white-space: pre;
}

/* ==========================================================================
   VIDEO DEMOS GALLERY
   ========================================================================== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.video-card {
  background: var(--rc-surface);
  border: 1px solid var(--rc-border);
  border-radius: var(--rc-radius-lg);
  overflow: hidden;
  transition: var(--rc-transition);
  display: flex;
  flex-direction: column;
}

.video-card:hover {
  border-color: var(--rc-accent-cyan);
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.4);
}

.video-thumb-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  overflow: hidden;
}

.video-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.video-card:hover .video-thumb-img {
  transform: scale(1.05);
}

.video-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 52px;
  height: 52px;
  background: rgba(8, 12, 20, 0.8);
  backdrop-filter: blur(8px);
  border: 2px solid var(--rc-accent-amber);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--rc-accent-amber);
  transition: var(--rc-transition);
  box-shadow: 0 0 16px var(--rc-accent-amber-glow);
}

.video-card:hover .video-play-btn {
  background: var(--rc-accent-amber);
  color: #080c14;
  transform: translate(-50%, -50%) scale(1.1);
}

.video-meta {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}

.video-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--rc-text-primary);
  line-height: 1.4;
}

.video-desc {
  font-size: 0.85rem;
  color: var(--rc-text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   DOWNLOADS & SCHEMATICS HUB
   ========================================================================== */
.downloads-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.download-card {
  background: var(--rc-surface);
  border: 1px solid var(--rc-border);
  border-radius: var(--rc-radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: var(--rc-transition);
}

.download-card:hover {
  border-color: var(--rc-accent-cyan);
  transform: translateY(-2px);
}

.download-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.download-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--rc-radius-md);
  background: var(--rc-surface-alt);
  border: 1px solid var(--rc-border-bright);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--rc-font-mono);
  font-size: 1.1rem;
  color: var(--rc-accent-cyan);
}

.download-size-badge {
  font-family: var(--rc-font-mono);
  font-size: 0.72rem;
  color: var(--rc-accent-amber);
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 3px 8px;
  border-radius: var(--rc-radius-sm);
}

.download-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--rc-text-primary);
}

.download-desc {
  font-size: 0.85rem;
  color: var(--rc-text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   ABOUT PETER & TRIBUTE
   ========================================================================== */
.about-card {
  background: var(--rc-surface);
  border: 1px solid var(--rc-border);
  border-radius: var(--rc-radius-xl);
  padding: 2.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.about-text h3 {
  font-family: var(--rc-font-display);
  font-size: 1.6rem;
  color: var(--rc-text-primary);
}

.about-quote {
  font-style: italic;
  font-size: 1.1rem;
  color: var(--rc-accent-amber);
  border-left: 3px solid var(--rc-accent-amber);
  padding-left: 1rem;
  margin: 0.5rem 0;
}

.about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
}

/* Apollo Inspiration Box */
.apollo-callout-box {
  background: var(--rc-surface-alt);
  border: 1px solid var(--rc-border-bright);
  border-left: 4px solid var(--rc-accent-cyan);
  border-radius: var(--rc-radius-lg);
  padding: 1.5rem 1.75rem;
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.apollo-callout-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.apollo-callout-title {
  font-family: var(--rc-font-display);
  font-size: 1.15rem;
  color: var(--rc-text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.apollo-links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.85rem;
}

.apollo-link {
  color: var(--rc-accent-cyan);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--rc-transition);
}

.apollo-link:hover {
  color: #7dd3fc;
  text-decoration: underline;
}

/* Team Steckbrief Grid */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.team-card {
  background: var(--rc-surface-alt);
  border: 1px solid var(--rc-border);
  border-radius: var(--rc-radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  overflow: hidden;
  transition: var(--rc-transition);
}

.team-card:hover {
  transform: translateY(-4px);
  border-color: var(--rc-accent-cyan);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
}

.team-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.team-avatar-badge {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--rc-font-display);
  font-weight: 800;
  font-size: 1.1rem;
  border: 2px solid currentColor;
}

.team-avatar-cb {
  color: var(--rc-accent-cyan);
  background: rgba(56, 189, 248, 0.1);
  box-shadow: 0 0 12px var(--rc-accent-cyan-glow);
}

.team-avatar-pp {
  color: var(--rc-accent-amber);
  background: rgba(245, 158, 11, 0.1);
  box-shadow: 0 0 12px var(--rc-accent-amber-glow);
}

.team-avatar-ag {
  color: var(--rc-accent-purple);
  background: rgba(168, 85, 247, 0.1);
  box-shadow: 0 0 12px rgba(168, 85, 247, 0.3);
}

.team-meta h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--rc-text-primary);
}

.team-role {
  font-family: var(--rc-font-mono);
  font-size: 0.76rem;
  color: var(--rc-text-muted);
}

.team-quote {
  font-style: italic;
  font-size: 0.88rem;
  color: var(--rc-text-secondary);
  border-left: 2px solid var(--rc-border-bright);
  padding-left: 0.75rem;
}

.team-details {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  font-size: 0.82rem;
  color: var(--rc-text-secondary);
}

.team-details li strong {
  color: var(--rc-text-primary);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  margin-top: auto;
  background: var(--rc-surface-alt);
  border-top: 1px solid var(--rc-border);
  padding: 3rem 1.5rem 2rem;
}

.footer-container {
  max-width: 1380px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-brand {
  max-width: 400px;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.82rem;
  color: var(--rc-text-muted);
}

/* ==========================================================================
   MODAL / LIGHTBOX
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(4, 7, 14, 0.92);
  backdrop-filter: blur(12px);
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.modal-overlay.active {
  display: flex;
}

.modal-dialog {
  max-width: 1100px;
  width: 100%;
  background: var(--rc-surface);
  border: 1px solid var(--rc-border-bright);
  border-radius: var(--rc-radius-xl);
  overflow: hidden;
  position: relative;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8);
}

.modal-close-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(8, 12, 20, 0.8);
  border: 1px solid var(--rc-border-bright);
  color: var(--rc-text-primary);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: var(--rc-transition);
}

.modal-close-btn:hover {
  background: var(--rc-accent-cyan);
  color: #080c14;
}

.modal-body {
  width: 100%;
  max-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
}

.modal-img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
}

.modal-video-wrap {
  width: 100%;
  aspect-ratio: 16 / 9;
}

.modal-video-iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* ==========================================================================
   RESPONSIVE DESIGN (TABLET & MOBILE)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .module-explorer-grid {
    grid-template-columns: 1fr;
  }
  
  .module-nav-list {
    flex-direction: row;
    overflow-x: auto;
    max-height: none;
    border-right: none;
    border-bottom: 1px solid var(--rc-border);
  }
  
  .module-nav-btn {
    white-space: nowrap;
    width: auto;
  }
  
  .arch-pillars-grid {
    grid-template-columns: 1fr;
  }
  
  .algo-content-grid {
    grid-template-columns: 1fr;
  }
  
  .algo-info-pane {
    border-right: none;
    border-bottom: 1px solid var(--rc-border);
  }
  
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .downloads-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .about-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 1240px) {
  .nav-links {
    display: none;
  }
  
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--rc-border-bright);
    padding: 1.25rem 1.25rem 1.5rem;
    gap: 0.6rem;
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.85);
    max-height: calc(100vh - 70px);
    overflow-y: auto;
  }
  
  .nav-links.open .nav-link {
    font-size: 0.95rem;
    padding: 0.65rem 0.85rem;
    border-radius: var(--rc-radius-md);
    background: rgba(30, 41, 59, 0.45);
    display: block;
    width: 100%;
  }

  .nav-mobile-item {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-top: 0.5rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--rc-border-bright);
  }

  .nav-mobile-item .btn-time-travel,
  .nav-mobile-item .btn-relay-sound {
    display: flex;
    justify-content: center;
    width: 100%;
    padding: 0.65rem 1rem;
    font-size: 0.88rem;
  }
  
  .nav-toggle-btn {
    display: flex;
  }

  .nav-action-desktop {
    display: none !important;
  }
}

@media (max-width: 520px) {
  .nav-container {
    padding: 0.55rem 0.75rem;
    gap: 0.5rem;
  }

  .brand-link {
    gap: 0.5rem;
  }

  .brand-logo-badge {
    width: 32px;
    height: 32px;
    font-size: 0.85rem;
  }

  .brand-title {
    font-size: 0.88rem;
    letter-spacing: 0.02em;
  }

  .brand-subtitle {
    display: none;
  }

  .lang-btn {
    padding: 3px 7px;
    font-size: 0.7rem;
  }

  .nav-toggle-btn {
    padding: 5px 8px;
  }

  .hero-title {
    font-size: clamp(1.45rem, 5.5vw, 2rem);
  }
}

@media (max-width: 380px) {
  .nav-container {
    padding: 0.45rem 0.5rem;
    gap: 0.35rem;
  }

  .brand-logo-badge {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
  }

  .brand-title {
    font-size: 0.8rem;
  }
}

@media (max-width: 768px) {
  .hero-stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .module-details-grid {
    grid-template-columns: 1fr;
  }
  
  .video-grid {
    grid-template-columns: 1fr;
  }
  
  .downloads-grid {
    grid-template-columns: 1fr;
  }
}