// ===== MOLECULAR PARTICLE ANIMATION =====

// Create a canvas background
const canvas = document.createElement('canvas');
canvas.id = 'moleculeCanvas';
document.body.appendChild(canvas);
const ctx = canvas.getContext('2d');

// Resize canvas to full window
function resizeCanvas() {
    canvas.width = window.innerWidth;
    canvas.height = window.innerHeight;
}
window.addEventListener('resize', resizeCanvas);
resizeCanvas();

// Create particles
let particles = [];
const numParticles = 80;

for (let i = 0; i < numParticles; i++) {
    particles.push({
        x: Math.random() * canvas.width,
        y: Math.random() * canvas.height,
        radius: Math.random() * 4 + 1,
        color: Math.random() > 0.5 ? '#00ff88' : '#ffaa00',
        speedX: (Math.random() - 0.5) * 1.5,
        speedY: (Math.random() - 0.5) * 1.5
    });
}

// Animation loop
function animate() {
    ctx.clearRect(0, 0, canvas.width, canvas.height);

    // Draw and move particles
    particles.forEach((p, index) => {
        p.x += p.speedX;
        p.y += p.speedY;

        // Bounce off edges
        if (p.x < 0 || p.x > canvas.width) p.speedX *= -1;
        if (p.y < 0 || p.y > canvas.height) p.speedY *= -1;

        // Draw particle
        ctx.beginPath();
        ctx.arc(p.x, p.y, p.radius, 0, Math.PI * 2);
        ctx.fillStyle = p.color;
        ctx.fill();

        // Connect lines if particles are close
        for (let j = index + 1; j < particles.length; j++) {
            let dx = particles[j].x - p.x;
            let dy = particles[j].y - p.y;
            let distance = Math.sqrt(dx * dx + dy * dy);
            if (distance < 120) {
                ctx.beginPath();
                ctx.moveTo(p.x, p.y);
                ctx.lineTo(particles[j].x, particles[j].y);
                ctx.strokeStyle = p.color === '#00ff88' ? '#00ff88aa' : '#ffaa00aa';
                ctx.lineWidth = 0.5;
                ctx.stroke();
            }
        }
    });

    requestAnimationFrame(animate);
}

animate();