<!-- ============================================================
  CODE BLOCK: HERO CON CANVAS RED NEURAL INTEGRADO
  Pega esto en un Code Block de Squarespace donde quieras el Hero.
  El canvas ocupa solo esta sección, no toda la página.
  ============================================================ -->
<style>
  /* Contenedor del hero */
  .hero-cn {
    position: relative;
    width: 100%;
    min-height: 100vh;
    background: #0a0e27;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
  }

  /* Canvas: solo dentro del hero */
  .hero-cn canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
  }

  /* Contenido por encima del canvas */
  .hero-cn .content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    padding: 100px 24px 80px;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  }

  .hero-cn .badge {
    display: inline-block;
    padding: 8px 20px;
    border: 1px solid #00e5ff;
    border-radius: 100px;
    color: #00e5ff;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 32px;
    background: rgba(0, 229, 255, 0.06);
  }

  .hero-cn h1 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: clamp(2.2rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    color: #ffffff;
  }

  .hero-cn h1 .accent {
    color: #00e5ff;
    display: block;
  }

  .hero-cn .subtitle {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
  }

  .hero-cn .ctas {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 24px;
  }

  .hero-cn .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    text-decoration: none;
    border-radius: 100px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
  }

  .hero-cn .btn-p {
    background: #00e5ff;
    color: #0a0e27;
  }

  .hero-cn .btn-p:hover {
    background: #33ebff;
    box-shadow: 0 0 40px rgba(0, 229, 255, 0.35);
    transform: translateY(-2px);
  }

  .hero-cn .btn-o {
    background: transparent;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.3);
  }

  .hero-cn .btn-o:hover {
    border-color: #00e5ff;
    color: #00e5ff;
    background: rgba(0, 229, 255, 0.05);
  }

  .hero-cn .note {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
  }

  .hero-cn .note span {
    color: #00e5ff;
  }

  /* Scroll indicator */
  .hero-cn .scroll-ind {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.3);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    animation: bounce 2s infinite;
  }

  @keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
  }
</style>

<div class="hero-cn" id="hero-congreso">
  <canvas id="neural-hero-canvas"></canvas>

  <div class="content">
    <div class="badge">EVENTO HIBRIDO: PRESENCIAL Y VIRTUAL</div>
    <h1>
      XIX Congreso Venezolano de Neurologia
      <span class="accent">& XVI de Neuropediatria</span>
    </h1>
    <p class="subtitle">
      Innovacion y Practica Clinica en la Era Digital.
      Abordaje integral de patologias neurologicas complejas en adultos y pediatria.
    </p>
    <div class="ctas">
      <a href="#" class="btn btn-p">Inscribete Ahora</a>
      <a href="#agenda" class="btn btn-o">Ver Agenda</a>
    </div>
    <p class="note">
      <span>✦</span>
      Invitados internacionales de primer nivel confirmados
    </p>
  </div>

  <div class="scroll-ind">
    <span>Scroll</span>
    <span>↓</span>
  </div>
</div>

<script>
(function() {
  var container = document.getElementById('hero-congreso');
  var canvas = document.getElementById('neural-hero-canvas');
  var ctx = canvas.getContext('2d');
  var W, H, mouse = { x: -1000, y: -1000 };
  var config = {
    gridSpacing: 70,
    connectionDist: 100,
    mouseRadius: 160,
    baseOpacity: 0.1,
    activeOpacity: 0.5,
    particleCount: 25
  };
  var points = [], particles = [];

  function resize() {
    var rect = container.getBoundingClientRect();
    W = canvas.width = rect.width;
    H = canvas.height = rect.height;
    initGrid();
    initParticles();
  }

  function initGrid() {
    points = [];
    var cols = Math.ceil(W / config.gridSpacing) + 1;
    var rows = Math.ceil(H / config.gridSpacing) + 1;
    for (var r = 0; r < rows; r++) {
      for (var c = 0; c < cols; c++) {
        points.push({
          x: c * config.gridSpacing,
          y: r * config.gridSpacing,
          baseX: c * config.gridSpacing,
          baseY: r * config.gridSpacing
        });
      }
    }
  }

  function initParticles() {
    particles = [];
    for (var i = 0; i < config.particleCount; i++) {
      particles.push({
        x: Math.random() * W,
        y: Math.random() * H,
        vx: (Math.random() - 0.5) * 0.4,
        vy: (Math.random() - 0.5) * 0.4,
        size: Math.random() * 2 + 1,
        opacity: Math.random() * 0.4 + 0.1
      });
    }
  }

  // Mouse tracking relative to canvas
  canvas.addEventListener('mousemove', function(e) {
    var rect = canvas.getBoundingClientRect();
    mouse.x = e.clientX - rect.left;
    mouse.y = e.clientY - rect.top;
  });
  canvas.addEventListener('mouseleave', function() {
    mouse.x = -1000;
    mouse.y = -1000;
  });

  function dist(a, b) {
    var dx = a.x - b.x, dy = a.y - b.y;
    return Math.sqrt(dx * dx + dy * dy);
  }

  function mdist(p) {
    var dx = p.x - mouse.x, dy = p.y - mouse.y;
    return Math.sqrt(dx * dx + dy * dy);
  }

  var time = 0;
  function draw() {
    time += 0.016;
    ctx.clearRect(0, 0, W, H);

    // Connections
    for (var i = 0; i < points.length; i++) {
      var m1 = mdist(points[i]), near1 = m1 < config.mouseRadius;
      for (var j = i + 1; j < points.length; j++) {
        var d = dist(points[i], points[j]);
        if (d < config.connectionDist) {
          var m2 = mdist(points[j]), near2 = m2 < config.mouseRadius;
          var op = config.baseOpacity;
          if (near1 || near2) {
            var mm = Math.min(m1, m2);
            op = config.baseOpacity + (config.activeOpacity - config.baseOpacity) * (1 - mm / config.mouseRadius);
          }
          var df = 1 - (d / config.connectionDist);
          op *= df;
          ctx.beginPath();
          ctx.moveTo(points[i].x, points[i].y);
          ctx.lineTo(points[j].x, points[j].y);
          ctx.strokeStyle = 'rgba(0,229,255,' + op + ')';
          ctx.lineWidth = 1;
          ctx.stroke();
        }
      }
    }

    // Dots
    for (var i = 0; i < points.length; i++) {
      var m = mdist(points[i]), op = config.baseOpacity, r = 2;
      if (m < config.mouseRadius) {
        var f = 1 - m / config.mouseRadius;
        op = config.baseOpacity + (1 - config.baseOpacity) * f;
        r = 2 + 3 * f;
      }
      ctx.beginPath();
      ctx.arc(points[i].x, points[i].y, r, 0, Math.PI * 2);
      ctx.fillStyle = 'rgba(0,229,255,' + op + ')';
      ctx.fill();
    }

    // Floating particles
    for (var i = 0; i < particles.length; i++) {
      var p = particles[i];
      p.x += p.vx;
      p.y += p.vy;
      if (p.x < 0) p.x = W;
      if (p.x > W) p.x = 0;
      if (p.y < 0) p.y = H;
      if (p.y > H) p.y = 0;
      var pmd = Math.sqrt((p.x - mouse.x) ** 2 + (p.y - mouse.y) ** 2);
      var pop = p.opacity;
      if (pmd < config.mouseRadius) pop = Math.min(1, p.opacity * 2);
      ctx.beginPath();
      ctx.arc(p.x, p.y, p.size, 0, Math.PI * 2);
      ctx.fillStyle = 'rgba(0,229,255,' + pop + ')';
      ctx.fill();
      if (pmd < config.mouseRadius) {
        ctx.beginPath();
        ctx.arc(p.x, p.y, p.size * 4, 0, Math.PI * 2);
        ctx.fillStyle = 'rgba(0,229,255,' + (0.1 * (1 - pmd / config.mouseRadius)) + ')';
        ctx.fill();
      }
    }

    requestAnimationFrame(draw);
  }

  window.addEventListener('resize', resize);
  resize();
  draw();
})();
</script>