/* CSS Design System and Stylesheet for OpenCrawling.github.io */

/* 1. Define Cascade Layers */
@layer reset, base, layout, components, utilities, animations;

@layer reset {
  *, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  html {
    scroll-behavior: smooth;
  }
  
  img, svg {
    display: block;
    max-width: 100%;
    height: auto;
  }
  
  button, select, input {
    font: inherit;
    background: none;
    border: none;
    color: inherit;
  }
  
  a {
    color: inherit;
    text-decoration: none;
  }
}

@layer base {
  :root {
    color-scheme: dark; /* Dark mode by default */
    
    /* Font Families */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-body: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Fira Code', 'Courier New', Courier, monospace;
    
    /* Design Tokens - Adaptive with light-dark() */
    --bg-color: light-dark(#F8FAFC, #07090E);
    --text-color: light-dark(#0F172A, #F1F5F9);
    --text-muted: light-dark(#475569, #94A3B8);
    
    --card-bg: light-dark(rgba(255, 255, 255, 0.75), rgba(15, 23, 42, 0.65));
    --card-border: light-dark(rgba(15, 23, 42, 0.08), rgba(255, 255, 255, 0.08));
    --card-hover-border: light-dark(rgba(124, 58, 237, 0.3), rgba(124, 58, 237, 0.4));
    
    --header-bg: light-dark(rgba(248, 250, 252, 0.8), rgba(7, 9, 14, 0.8));
    --footer-bg: light-dark(#F1F5F9, #0B0E14);
    
    /* Static Tokens (Aesthetics remain neon and high-contrast in both modes) */
    --accent-color: #8B5CF6; /* Electric Violet */
    --accent-hover: #7C3AED;
    --cyan-color: #06B6D4; /* Tech Cyan */
    --cyan-hover: #0891B2;
    --success-color: #10B981; /* Emerald Success */
    
    --accent-glow: rgba(139, 92, 246, 0.15);
    --cyan-glow: rgba(6, 182, 212, 0.15);
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Sizes */
    --container-width: 1200px;
    --header-height: 80px;
  }
  
  /* Class overrides for manual toggle fallback */
  html.light {
    color-scheme: light;
  }
  html.dark {
    color-scheme: dark;
  }

  body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    transition: background-color 0.3s ease, color 0.3s ease;
  }

  h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.02em;
  }
}

@layer layout {
  /* Site Header */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--header-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--card-border);
    z-index: 100;
    transition: background-color 0.3s ease;
  }
  
  .header-container {
    max-width: var(--container-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  
  .brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.35rem;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--text-color) 40%, var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  
  .brand-logo {
    width: 32px;
    height: 32px;
    object-fit: contain;
    filter: drop-shadow(0 2px 8px var(--accent-glow));
  }
  
  .main-nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
  }
  
  .main-nav a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
    position: relative;
    padding: 0.5rem 0;
    transition: color 0.25s ease;
  }
  
  .main-nav a:hover {
    color: var(--text-color);
  }
  
  .main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(to right, var(--accent-color), var(--cyan-color));
    transition: width 0.25s ease;
  }
  
  .main-nav a:hover::after {
    width: 100%;
  }
  
  .header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
  }
  
  /* Sections */
  section {
    padding: 6rem 2rem;
    position: relative;
  }
  
  .section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem auto;
  }
  
  .section-title {
    font-size: clamp(2rem, 1rem + 2.5vw, 3rem);
    margin-bottom: 1rem;
    text-wrap: balance;
    background: linear-gradient(to bottom right, var(--text-color), var(--text-muted));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  
  .section-subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    text-wrap: pretty;
  }
}

@layer components {
  /* Custom Buttons */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.75rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
  }
  
  .btn-primary {
    background: linear-gradient(135deg, var(--accent-color), var(--cyan-color));
    color: #FFFFFF;
    box-shadow: 0 4px 14px 0 var(--accent-glow);
  }
  
  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 var(--accent-glow), 0 0 10px var(--cyan-glow);
  }
  
  .btn-secondary {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-color);
  }
  
  .btn-secondary:hover {
    border-color: var(--accent-color);
    background-color: light-dark(rgba(255, 255, 255, 0.9), rgba(15, 23, 42, 0.8));
    transform: translateY(-2px);
  }
  
  .btn-full {
    width: 100%;
  }
  
  .github-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.85rem;
    transition: all 0.2s ease;
  }
  
  .github-btn:hover {
    border-color: var(--text-color);
    transform: scale(1.02);
  }
  
  /* Theme Toggle Button */
  .theme-toggle-btn {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-color);
    transition: all 0.2s ease;
  }
  
  .theme-toggle-btn:hover {
    border-color: var(--accent-color);
  }
  
  .sun-icon {
    display: none;
    width: 20px;
    height: 20px;
  }
  
  .moon-icon {
    display: block;
    width: 20px;
    height: 20px;
  }
  
  :root[color-scheme="light"] .sun-icon,
  html.light .sun-icon {
    display: block;
  }
  
  :root[color-scheme="light"] .moon-icon,
  html.light .moon-icon {
    display: none;
  }
  
  /* Glassmorphism Panel */
  .glass {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 12px;
  }
  
  /* Hero Section */
  .hero-section {
    padding-top: calc(var(--header-height) + 4rem);
    padding-bottom: 4rem;
  }
  
  .hero-container {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
    align-items: center;
  }
  
  .badge-container {
    margin-bottom: 1.5rem;
  }
  
  .animated-badge {
    display: inline-flex;
    padding: 0.35rem 1rem;
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    background: var(--accent-glow);
    border: 1px solid rgba(139, 92, 246, 0.2);
    color: #C084FC;
    box-shadow: 0 0 12px var(--accent-glow);
  }
  
  .hero-title {
    font-size: clamp(2.5rem, 1rem + 4vw, 4.25rem);
    margin-bottom: 1.5rem;
    line-height: 1.1;
    text-wrap: balance;
  }
  
  .gradient-text {
    background: linear-gradient(135deg, var(--accent-color), var(--cyan-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  
  .hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 600px;
    text-wrap: pretty;
  }
  
  .hero-actions {
    display: flex;
    gap: 1rem;
  }
  
  .hero-visual {
    display: flex;
    justify-content: center;
    perspective: 1000px;
  }
  
  /* Terminal Card component */
  .terminal-card {
    width: 100%;
    max-width: 500px;
    background: #090D16;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5), 0 0 40px rgba(124, 58, 237, 0.1);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    overflow: hidden;
    transform: rotateY(-5deg) rotateX(5deg);
    transition: transform 0.3s ease;
  }
  
  .terminal-card:hover {
    transform: rotateY(0deg) rotateX(0deg);
  }
  
  .terminal-header {
    background: #0E1321;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }
  
  .terminal-header .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
  }
  
  .terminal-header .dot.red { background: #EF4444; }
  .terminal-header .dot.yellow { background: #F59E0B; }
  .terminal-header .dot.green { background: #10B981; }
  
  .terminal-title {
    margin-left: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
  }
  
  .terminal-body {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    color: #CBD5E1;
  }
  
  .terminal-body .line {
    word-break: break-all;
  }
  
  .terminal-body .comment { color: #64748B; }
  .terminal-body .cmd { color: var(--cyan-color); }
  .terminal-body .output { color: #94A3B8; }
  .terminal-body .success { color: var(--success-color); }
  
  /* Stats Section */
  .stats-section {
    padding: 2rem;
  }
  
  .stats-container {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
  
  .stat-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
  }
  
  .stat-num {
    font-size: 2.25rem;
    font-weight: 800;
    font-family: var(--font-heading);
    background: linear-gradient(135deg, var(--accent-color), var(--cyan-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  
  .stat-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
  }
  
  /* Features Grid */
  .features-grid {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
  
  .feature-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 2.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
  }
  
  .feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, var(--accent-color), var(--cyan-color));
    opacity: 0;
    transition: opacity 0.3s ease;
  }
  
  .feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--card-hover-border);
    box-shadow: var(--shadow-lg), 0 0 20px var(--accent-glow);
  }
  
  .feature-card:hover::before {
    opacity: 1;
  }
  
  .feature-icon-wrapper {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    background: var(--accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
    border: 1px solid rgba(139, 92, 246, 0.15);
  }
  
  .feature-icon {
    width: 24px;
    height: 24px;
  }
  
  .feature-card h3 {
    font-size: 1.35rem;
    margin-bottom: 0.75rem;
  }
  
  .feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
  }
  
  /* Architecture Section */
  .architecture-container {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    gap: 3rem;
    align-items: center;
  }
  
  .arch-visual {
    background: #090D16;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow-xl);
  }
  
  /* SVG Architectures styles */
  #arch-svg {
    width: 100%;
    height: auto;
  }
  
  .flow-line {
    stroke-width: 2;
    fill: none;
  }
  
  .flow-line.line-active {
    stroke: #1E293B;
  }
  
  .flow-line.line-dashed {
    stroke: rgba(255, 255, 255, 0.1);
    stroke-dasharray: 4, 4;
  }
  
  .node-bg {
    fill: #0F172A;
    stroke: rgba(255, 255, 255, 0.08);
    stroke-width: 1.5;
    transition: all 0.3s ease;
  }
  
  .node-bg.accent {
    fill: rgba(139, 92, 246, 0.05);
    stroke: var(--accent-color);
  }
  
  .node-bg.cyan {
    fill: rgba(6, 182, 212, 0.05);
    stroke: var(--cyan-color);
  }
  
  .node-bg.border-only {
    fill: #0E1321;
    stroke: rgba(255, 255, 255, 0.05);
  }
  
  .node-group {
    cursor: pointer;
  }
  
  .node-group:hover .node-bg {
    stroke-width: 2;
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.05));
  }
  
  .node-group:hover .node-bg.accent {
    filter: drop-shadow(0 0 15px var(--accent-glow));
    fill: rgba(139, 92, 246, 0.1);
  }
  
  .node-group:hover .node-bg.cyan {
    filter: drop-shadow(0 0 15px var(--cyan-glow));
    fill: rgba(6, 182, 212, 0.1);
  }
  
  .node-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 14px;
    fill: #F1F5F9;
    text-anchor: middle;
  }
  
  .node-title-small {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 12px;
    fill: #F1F5F9;
    text-anchor: middle;
  }
  
  .node-title.accent-text {
    fill: #C084FC;
  }
  
  .node-title.cyan-text {
    fill: #22D3EE;
  }
  
  .node-sub {
    font-family: var(--font-body);
    font-size: 11px;
    fill: #94A3B8;
    text-anchor: middle;
  }
  
  .node-desc {
    font-family: var(--font-body);
    font-size: 10px;
    fill: #64748B;
    text-anchor: middle;
  }
  
  .arch-info-card {
    padding: 2.5rem;
    height: 100%;
    min-height: 250px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: all 0.3s ease;
  }
  
  .arch-info-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--accent-color), var(--cyan-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  
  .arch-info-card p {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.7;
  }
  
  /* Simulator Section */
  .simulator-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 2rem;
  }
  
  .sim-controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .sim-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .sim-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-color);
  }
  
  .sim-group select {
    background: light-dark(rgba(0, 0, 0, 0.03), rgba(255, 255, 255, 0.03));
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: var(--text-color);
    outline: none;
    font-size: 0.95rem;
    transition: all 0.2s ease;
  }
  
  .sim-group select:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 8px var(--accent-glow);
  }
  
  .sim-display {
    background: #090D16;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    overflow: hidden;
  }
  
  .sim-status-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.85rem;
    font-weight: 600;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }
  
  .status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #64748B; /* grey when idle */
    box-shadow: 0 0 8px #64748B;
  }
  
  .status-indicator.active {
    background: var(--cyan-color);
    box-shadow: 0 0 10px var(--cyan-color);
    animation: pulse 1.5s infinite;
  }
  
  .status-indicator.success {
    background: var(--success-color);
    box-shadow: 0 0 10px var(--success-color);
  }
  
  /* Pipeline flow simulator visual */
  .sim-pipeline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    position: relative;
  }
  
  .pipeline-station {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    z-index: 2;
  }
  
  .station-icon {
    width: 48px;
    height: 48px;
    background: #0F172A;
    border: 1.5px solid rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    transition: all 0.3s ease;
  }
  
  .pipeline-station.active .station-icon {
    border-color: var(--accent-color);
    box-shadow: 0 0 15px var(--accent-glow);
    transform: scale(1.1);
  }
  
  .station-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
  }
  
  .pipeline-connector-line {
    flex-grow: 1;
    height: 2px;
    background: rgba(255, 255, 255, 0.08);
    margin: 0 -0.5rem;
    margin-bottom: 1.25rem; /* align center with circle icons */
    position: relative;
    overflow: hidden;
  }
  
  .pipeline-pulse {
    position: absolute;
    top: 0;
    left: -20px;
    width: 20px;
    height: 100%;
    background: linear-gradient(to right, transparent, var(--cyan-color), transparent);
    display: none;
  }
  
  .pipeline-pulse.active {
    display: block;
    animation: flow 1.2s linear infinite;
  }
  
  /* Terminal Logs */
  .sim-terminal {
    background: #05080E;
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    display: flex;
    flex-direction: column;
    height: 180px;
  }
  
  .sim-terminal-header {
    background: #090E16;
    padding: 0.5rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
  }
  
  .clear-logs-btn {
    font-size: 0.7rem;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.08);
  }
  
  .clear-logs-btn:hover {
    border-color: var(--text-color);
  }
  
  .sim-terminal-body {
    padding: 1rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    flex-grow: 1;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
  }
  
  .log-line {
    word-break: break-all;
  }
  
  .log-info { color: #64748B; }
  .log-warn { color: #F59E0B; }
  .log-success { color: var(--success-color); }
  .log-process { color: var(--cyan-color); }
  
  /* Tabs Container (Quick Start) */
  .tabs-container {
    max-width: 800px;
    margin: 0 auto;
    overflow: hidden;
  }
  
  .tabs-header {
    display: flex;
    background: rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid var(--card-border);
  }
  
  .tab-btn {
    flex: 1;
    padding: 1rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    text-align: center;
    transition: all 0.2s ease;
    border-bottom: 2px solid transparent;
  }
  
  .tab-btn:hover {
    color: var(--text-color);
  }
  
  .tab-btn.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
    background: rgba(139, 92, 246, 0.02);
  }
  
  .tabs-content {
    padding: 1.5rem;
  }
  
  .tab-pane {
    display: none;
  }
  
  .tab-pane.active {
    display: block;
  }
  
  /* Code blocks styles */
  .code-wrapper {
    position: relative;
  }
  
  .code-wrapper pre {
    margin: 0;
    padding: 1.25rem;
    border-radius: 8px;
    background: #090D16;
    overflow-x: auto;
    border: 1px solid rgba(255, 255, 255, 0.03);
  }
  
  .code-wrapper code {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: #E2E8F0;
  }
  
  .copy-code-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    padding: 0.25rem 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
  }
  
  .copy-code-btn:hover {
    color: var(--text-color);
    background: rgba(255, 255, 255, 0.1);
  }
  
  /* Community Cards */
  .community-grid {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
  
  .community-card {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  
  .community-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-4px) scale(1.01);
    box-shadow: var(--shadow-lg), 0 0 15px var(--accent-glow);
  }
  
  .community-icon {
    font-size: 2rem;
  }
  
  .community-card h3 {
    font-size: 1.25rem;
  }
  
  .community-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
  }
  
  .card-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-color);
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    transition: gap 0.25s ease;
  }
  
  .community-card:hover .card-link {
    gap: 0.5rem;
  }
  
  /* Footer */
  .site-footer {
    background-color: var(--footer-bg);
    border-top: 1px solid var(--card-border);
    padding: 3rem 2rem;
    margin-top: 4rem;
    transition: background-color 0.3s ease;
  }
  
  .footer-container {
    max-width: var(--container-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.15rem;
  }
  
  .footer-logo {
    width: 24px;
    height: 24px;
    object-fit: contain;
  }
  
  .footer-info {
    text-align: right;
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
  }
  
  .footer-info a {
    color: var(--accent-color);
    font-weight: 500;
  }
  
  .footer-info a:hover {
    text-decoration: underline;
  }
}

@layer utilities {
  /* Glow Grid backgrounds */
  .glow-bg-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1200px;
    background-image: 
      linear-gradient(rgba(139, 92, 246, 0.015) 1px, transparent 1px),
      linear-gradient(90deg, rgba(139, 92, 246, 0.015) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: center;
    mask-image: radial-gradient(ellipse at 50% 30%, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at 50% 30%, black 20%, transparent 70%);
    z-index: -10;
    pointer-events: none;
  }

  .glow-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(140px);
    opacity: 0.12;
    z-index: -9;
    pointer-events: none;
  }
  
  .glow-blob-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--accent-color), transparent 70%);
    top: -100px;
    right: -100px;
    animation: float-blob-1 20s ease-in-out infinite alternate;
  }
  
  .glow-blob-2 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--cyan-color), transparent 70%);
    top: 300px;
    left: -200px;
    animation: float-blob-2 25s ease-in-out infinite alternate;
  }
}

@layer animations {
  /* Keyframe definitions */
  @keyframes float-blob-1 {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-80px, 80px) scale(1.1); }
  }
  
  @keyframes float-blob-2 {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(100px, -60px) scale(0.95); }
  }
  
  @keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.9; }
    50% { transform: scale(1.2); opacity: 1; }
  }
  
  @keyframes flow {
    0% { left: -20px; }
    100% { left: 100%; }
  }

  /* Scroll entry and exit effects */
  @media (prefers-reduced-motion: no-preference) {
    @supports ((animation-timeline: view()) and (animation-range: entry)) {
      @keyframes fade-in-up {
        from {
          opacity: 0;
          transform: translateY(30px);
        }
        to {
          opacity: 1;
          transform: translateY(0);
        }
      }

      .feature-card,
      .community-card,
      .stat-card,
      .arch-visual,
      .simulator-container {
        animation: fade-in-up auto linear;
        animation-timeline: view();
        animation-range: entry 10% entry 40%;
        animation-fill-mode: both;
      }
    }
  }
}

/* Responsive Overrides (Standard Breakpoints) */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }
  
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-visual {
    order: -1;
  }
  
  .architecture-container {
    grid-template-columns: 1fr;
  }
  
  .simulator-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none; /* simple mobile fallback, hiding links */
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-container {
    grid-template-columns: 1fr;
  }
  
  .community-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-container {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }
  
  .footer-info {
    text-align: center;
  }
}