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

body {
  font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  margin: 0;
  background: #020617;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.graph-wrapper {
  position: relative;
  width: 100%;
  max-width: 1000px;
  height: 600px;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  background: linear-gradient(135deg, #0f172a, #1e1b4b);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

#node-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.graph-overlay {
  position: absolute;
  bottom: 40px;
  left: 40px;
  z-index: 2;
  pointer-events: none;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(12px);
  padding: 24px 30px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.graph-overlay h2 {
  color: #f8fafc;
  margin: 0 0 8px 0;
  font-size: 2rem;
  letter-spacing: -0.5px;
}

.graph-overlay p {
  color: #94a3b8;
  margin: 0;
  font-size: 1.125rem;
}

const canvas = document.getElementById("node-canvas");
const ctx = canvas.getContext("2d");

const width = 1000;
const height = 600;
canvas.width = width;
canvas.height = height;

const nodes = new Array();
const numNodes = 60;

for (let i = 0; i < numNodes; i++) {
  const node = new Object();
  node.x = Math.random() * width;
  node.y = Math.random() * height;
  node.vx = (Math.random() - 0.5) * 1.5;
  node.vy = (Math.random() - 0.5) * 1.5;
  node.radius = Math.random() * 2 + 2;
  nodes.push(node);
}

const mouse = new Object();
mouse.x = width / 2;
mouse.y = height / 2;
mouse.radius = 120;

canvas.addEventListener("mousemove", function(e) {
  const rect = canvas.getBoundingClientRect();
  mouse.x = (e.clientX - rect.left) * (width / rect.width);
  mouse.y = (e.clientY - rect.top) * (height / rect.height);
});

function animate() {
  ctx.clearRect(0, 0, width, height);
  
  nodes.forEach(function(node) {
    node.x += node.vx;
    node.y += node.vy;
    
    if (node.x < 0 || node.x > width) node.vx *= -1;
    if (node.y < 0 || node.y > height) node.vy *= -1;
    
    const dxMouse = mouse.x - node.x;
    const dyMouse = mouse.y - node.y;
    const distanceMouse = Math.sqrt(dxMouse * dxMouse + dyMouse * dyMouse);
    
    if (distanceMouse < mouse.radius) {
      const force = (mouse.radius - distanceMouse) / mouse.radius;
      node.vx -= (dxMouse / distanceMouse) * force * 0.5;
      node.vy -= (dyMouse / distanceMouse) * force * 0.5;
    }
    
    node.vx *= 0.99;
    node.vy *= 0.99;
    
    ctx.beginPath();
    ctx.arc(node.x, node.y, node.radius, 0, Math.PI * 2);
    ctx.fillStyle = "#3b82f6";
    ctx.fill();
  });
  
  nodes.forEach(function(nodeA) {
    nodes.forEach(function(nodeB) {
      const dx = nodeA.x - nodeB.x;
      const dy = nodeA.y - nodeB.y;
      const dist = Math.sqrt(dx * dx + dy * dy);
      
      if (dist > 0 && dist < 120) {
        ctx.beginPath();
        ctx.moveTo(nodeA.x, nodeA.y);
        ctx.lineTo(nodeB.x, nodeB.y);
        const opacity = 1 - (dist / 120);
        ctx.strokeStyle = "rgba(139, 92, 246, " + opacity + ")";
        ctx.lineWidth = 1;
        ctx.stroke();
      }
    });
  });
  
  window.requestAnimationFrame(animate);
}

animate();