:root {
    --bg: #191127;
    --surface: #23133a;
    --surface2: #1f1232;
    --border: #3a1c63;
    --accent: #883CF0;
    --accent2: #7c3aed;
    --accent3: #b29dce;
    --accent4: #af62c8;
    --text: #e2e8f0;
    --muted: #d6d6d6;
    --glow: #a200ff26;
  }

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

  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Syne', sans-serif;
    overflow-x: hidden;
    cursor: none;
  }

  /* Custom cursor */
  .cursor {
    position: fixed;
    width: 12px; height: 12px;
    background: var(--accent);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: transform 0.1s, width 0.2s, height 0.2s;
    mix-blend-mode: screen;
  }
  .cursor-ring {
    position: fixed;
    width: 36px; height: 36px;
    border: 1px solid var(--accent);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9998;
    transform: translate(-50%, -50%);
    transition: transform 0.15s ease, width 0.3s, height 0.3s, opacity 0.3s;
    opacity: 0.5;
  }

  /* Grid background */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
      linear-gradient(#b300ff08 1px, transparent 1px),
      linear-gradient(90deg, rgba(183, 0, 255, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: 0;
  }

  /* HEADER */
  header {
    position: relative;
    z-index: 10;
    padding: 80px 60px 60px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    flex-wrap: wrap;
  }

  .logo-area {
    display: flex;
    align-items: center;
    gap: 16px;
  }

  .logo-icon {
    width: 52px; height: 52px;
    border: 1.5px solid var(--accent);
    display: flex; align-items: center; justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 18px;
    font-weight: 700;
    color: var(--accent);
    position: relative;
    animation: pulse-border 3s ease-in-out infinite;
  }
  .logo-icon::before {
    content: '';
    position: absolute;
    inset: -4px;
    border: 1px solid #3a1c63;
    animation: rotate 8s linear infinite;
  }

  @keyframes pulse-border {
    0%, 100% { box-shadow: 0 0 10px #be52e50f; }
    50% { box-shadow: 0 0 30px #c065e13b, 0 0 60px #be52e50f; }
  }
  @keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
  }

  .logo-text h1 {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.5px;
    line-height: 1;
  }
  .logo-text span { color: var(--accent); }
  .logo-text p {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--muted);
    margin-top: 4px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }

  .nav-pills {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
  }
  .pill {
    padding: 8px 18px;
    border: 1px solid var(--border);
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.05em;
    color: var(--muted);
    cursor: pointer;
    transition: all 0.2s;
    background: transparent;
    text-transform: uppercase;
  }
  .pill:hover, .pill.active {
    border-color: var(--accent);
    color: var(--accent);
    background: #23133a;
    box-shadow: 0 0 20px #be52e50f;
  }

  /* HERO SECTION */
  .hero {
    position: relative;
    z-index: 10;
    padding: 100px 60px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    border-bottom: 1px solid var(--border);
  }

  .hero-text {
    max-width: 560px;
  }

  .hero-eyebrow {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .hero-eyebrow::before {
    content: '';
    width: 40px; height: 1px;
    background: var(--accent);
  }

  .hero h2 {
    font-size: clamp(42px, 5vw, 72px);
    font-weight: 800;
    line-height: 0.95;
    letter-spacing: -2px;
    margin-bottom: 28px;
  }
  .hero h2 em {
    font-style: normal;
    color: var(--accent);
    display: block;
  }

  .hero-desc {
    font-size: 17px;
    line-height: 1.7;
    color: var(--muted);
    margin-bottom: 40px;
    font-weight: 400;
  }

  .hero-stats {
    display: flex;
    gap: 40px;
  }
  .stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }
  .stat-num {
    font-size: 32px;
    font-weight: 800;
    color: var(--accent);
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: -1px;
  }
  .stat-label {
    font-size: 12px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
  }

  /* LIVE ARCHITECTURE DIAGRAM */
  .arch-canvas {
    position: relative;
    height: 480px;
    background: var(--surface);
    border: 1px solid var(--border);
    overflow: hidden;
  }

  .arch-canvas svg {
    width: 100%;
    height: 100%;
  }

  /* CONTENT SECTIONS */
  .section {
    position: relative;
    z-index: 10;
    padding: 80px 60px;
    border-bottom: 1px solid var(--border);
  }

  .section-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 60px;
    gap: 20px;
    flex-wrap: wrap;
  }

  .section-title {
    font-size: 42px;
    font-weight: 800;
    letter-spacing: -1.5px;
    line-height: 1;
  }
  .section-title span { color: var(--accent); }

  .section-mono {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    border-left: 2px solid var(--accent);
    padding-left: 12px;
  }

  /* TABS */
  .tabs {
    display: flex;
    gap: 0;
    margin-bottom: 40px;
    border-bottom: 1px solid var(--border);
  }
  .tab {
    padding: 16px 28px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
    margin-bottom: -1px;
    background: transparent;
    border-left: none;
    border-right: none;
    border-top: none;
  }
  .tab:hover { color: var(--text); }
  .tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
  }

  .tab-content { display: none; }
  .tab-content.active { display: block; }

  /* DIAGRAM PANELS */
  .diagram-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
  }

  .diagram-card {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 32px;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: border-color 0.3s, transform 0.2s;
  }
  .diagram-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(128, 0, 255, 0.03) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.3s;
  }
  .diagram-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 20px 60px rgba(0,0,0,0.4), 0 0 30px #be52e50f;
  }
  .diagram-card:hover::before { opacity: 1; }

  .card-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 16px;
    opacity: 0.7;
  }
  .card-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.2;
  }
  .card-desc {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.6;
  }

  .card-icon {
    position: absolute;
    top: 24px;
    right: 24px;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: border-color 0.3s;
  }
  .diagram-card:hover .card-icon {
    border-color: var(--accent);
    box-shadow: 0 0 20px #be52e50f;
  }

  /* INTERACTIVE FLOW DIAGRAM */
  .flow-container {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 0;
    overflow: hidden;
  }

  .flow-toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    background: var(--surface2);
  }
  .flow-dot {
    width: 10px; height: 10px;
    border-radius: 50%;
  }

  #flow-canvas {
    width: 100%;
    height: 500px;
    display: block;
  }

  /* PROTOCOL COMPARISON */
  .compare-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 0;
    align-items: start;
  }

  .compare-col {
    padding: 40px;
    background: var(--surface);
    border: 1px solid var(--border);
  }
  .compare-col.old { border-right: none; }
  .compare-col.new { border-left: none; border-color: var(--accent); }

  .compare-vs {
    padding: 40px 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface2);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
  }
  .vs-text {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    color: var(--muted);
    writing-mode: vertical-rl;
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }

  .compare-title {
    font-size: 13px;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 28px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
  }
  .compare-col.new .compare-title { color: var(--accent); border-color: var(--accent); }

  .compare-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 20px;
    font-size: 14px;
    line-height: 1.5;
  }
  .compare-item .icon {
    font-size: 16px;
    margin-top: 1px;
    flex-shrink: 0;
  }
  .compare-col.old .compare-item { color: var(--muted); }
  .compare-col.new .compare-item { color: var(--text); }

  /* COMPONENT EXPLORER */
  .explorer {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    min-height: 500px;
  }

  .explorer-nav {
    border-right: 1px solid var(--border);
    padding: 24px 0;
  }

  .explorer-item {
    padding: 14px 28px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--muted);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: 0.03em;
    border-left: 2px solid transparent;
  }
  .explorer-item:hover { color: var(--text); background: #ffffff05; }
  .explorer-item.active {
    color: var(--accent);
    background: #51367a9f;
    border-left-color: var(--accent);
  }
  .explorer-item .dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: currentColor;
    flex-shrink: 0;
  }

  .explorer-content {
    padding: 40px;
  }

  .component-title {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 8px;
  }
  .component-badge {
    display: inline-block;
    padding: 4px 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    background: #291a3e;
    color: var(--accent);
    margin-bottom: 20px;
  }
  .component-desc {
    font-size: 15px;
    line-height: 1.7;
    color: var(--muted);
    margin-bottom: 32px;
    max-width: 560px;
  }

  .props-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  .prop-row {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 16px;
    padding: 14px 16px;
    background: var(--surface2);
    border-left: 2px solid var(--border);
    transition: border-color 0.2s;
  }
  .prop-row:hover { border-left-color: var(--accent); }
  .prop-name {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--accent3);
  }
  .prop-val {
    font-size: 13px;
    color: var(--text);
    line-height: 1.5;
  }

  /* ANIMATED PACKET */
  .packet-demo {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    position: relative;
    overflow: hidden;
  }

  .packet-line {
    display: flex;
    align-items: center;
    gap: 0;
    width: 100%;
    max-width: 700px;
    position: relative;
  }

  .packet-node {
    padding: 16px 24px;
    border: 1.5px solid var(--border);
    background: var(--surface2);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.05em;
    text-align: center;
    position: relative;
    z-index: 2;
    min-width: 120px;
  }
  .packet-node.highlight {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 20px #be52e50f;
  }
  .packet-node.server {
    border-color: var(--accent2);
    color: var(--accent2);
    box-shadow: 0 0 20px rgba(123,47,255,0.2);
  }
  .packet-node.source {
    border-color: var(--accent3);
    color: var(--accent3);
    box-shadow: 0 0 20px rgba(195, 0, 255, 0.2);
  }

  .packet-wire {
    flex: 1;
    height: 2px;
    background: linear-gradient(90deg, var(--border), var(--border));
    position: relative;
    overflow: hidden;
  }
  .packet-wire::after {
    content: '';
    position: absolute;
    top: -3px;
    width: 20px;
    height: 8px;
    background: var(--accent);
    border-radius: 4px;
    animation: packet-travel 2s linear infinite;
    box-shadow: 0 0 12px var(--accent), 0 0 24px #be52e50f;
  }
  .packet-wire.return::after {
    animation: packet-travel-reverse 2s linear infinite 1s;
    background: var(--accent3);
    box-shadow: 0 0 12px var(--accent3);
  }

  @keyframes packet-travel {
    from { left: -20px; opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    to { left: 100%; opacity: 0; }
  }
  @keyframes packet-travel-reverse {
    from { left: 100%; opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    to { left: -20px; opacity: 0; }
  }

  .node-label {
    font-size: 10px;
    color: var(--muted);
    text-align: center;
    margin-top: 8px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
  }

  .packet-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  /* TRANSPORT SECTION */
  .transport-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .transport-card {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 32px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s;
  }
  .transport-card::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    transform: scaleX(0);
    transition: transform 0.4s;
  }
  .transport-card:hover::after { transform: scaleX(1); }
  .transport-card:hover { border-color: #5e309d; }

  .transport-name {
    font-family: 'JetBrains Mono', monospace;
    font-size: 22px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
  }
  .transport-sub {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 24px;
    line-height: 1.5;
  }
  .transport-feat {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .feat-row {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--muted);
  }
  .feat-row .check { color: var(--accent3); }

  /* CODE BLOCK */
  .code-block {
    background: #020408;
    border: 1px solid var(--border);
    padding: 24px 28px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    line-height: 1.7;
    overflow-x: auto;
    position: relative;
    margin-top: 16px;
  }
  .code-block::before {
    content: 'JSON-RPC 2.0';
    position: absolute;
    top: 12px;
    right: 16px;
    font-size: 10px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
  }
  .kw { color: #7b2fff; }
  .str { color: #00ff88; }
  .num { color: #00d4ff; }
  .obj { color: #ff6b35; }
  .cm { color: #3d5470; }

  /* FOOTER */
  footer {
    position: relative;
    z-index: 10;
    padding: 60px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 24px;
  }
  .footer-text {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--muted);
    letter-spacing: 0.05em;
  }
  .footer-links {
    display: flex;
    gap: 24px;
  }
  .footer-link {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--muted);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: color 0.2s;
  }
  .footer-link:hover { color: var(--accent); }

  /* SCAN LINES OVERLAY */
  .scanlines {
    position: fixed;
    inset: 0;
    background: repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0,0,0,0.08) 2px,
      rgba(0,0,0,0.08) 4px
    );
    pointer-events: none;
    z-index: 5;
    opacity: 0.4;
  }

  /* GLOW ORBS */
  .orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(100px);
    pointer-events: none;
    opacity: 0.12;
    z-index: 1;
  }
  .orb1 { width: 600px; height: 600px; background: var(--accent2); top: -200px; right: -100px; }
  .orb2 { width: 400px; height: 400px; background: var(--accent); bottom: 100px; left: -100px; }

  /* RESPONSIVE */
  @media (max-width: 900px) {
    header, .hero, .section { padding: 40px 24px; }
    .hero { grid-template-columns: 1fr; gap: 40px; }
    .compare-grid { grid-template-columns: 1fr; }
    .compare-vs { display: none; }
    .compare-col.old { border-right: 1px solid var(--border); }
    .compare-col.new { border-left: 1px solid var(--accent); }
    .transport-grid { grid-template-columns: 1fr; }
    .explorer { grid-template-columns: 1fr; }
    .explorer-nav { border-right: none; border-bottom: 1px solid var(--border); display: flex; overflow-x: auto; padding: 0; }
    .explorer-item { white-space: nowrap; border-left: none; border-bottom: 2px solid transparent; }
    .explorer-item.active { border-left-color: transparent; border-bottom-color: var(--accent); }
    footer { padding: 40px 24px; flex-direction: column; align-items: flex-start; }
    .hero-stats { gap: 24px; }
  }

  /* SCROLL REVEAL */
  .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
  .reveal.visible {
    opacity: 1;
    transform: none;
  }