(function(){ var cv=document.createElement('canvas'); cv.id='bg-net'; cv.className='bg-network active'; document.body.prepend(cv); var ctx=cv.getContext('2d'); var nodes=[],W=0,H=0,mx=-9e3,my=-9e3; var reduce=matchMedia('(prefers-reduced-motion: reduce)').matches; // Touch/coarse-pointer devices (mobile) get a static frame instead of an // indefinite per-frame O(n^2) RAF loop — battery/CPU cost with no payoff // since there's no cursor to react to on those devices anyway. var lowMotion=reduce||matchMedia('(pointer: coarse)').matches; function isDark(){return document.documentElement.getAttribute('data-theme')==='dark';} function seed(){ var n=Math.min(95,Math.round(W*H/17000)); nodes=[]; for(var i=0;iW)p.vx*=-1; if(p.y<0||p.y>H)p.vy*=-1; } for(var i=0;i130||Math.abs(dy)>130)continue; var d=Math.hypot(dx,dy); if(d<130){ ctx.strokeStyle='rgba('+lineC+','+((1-d/130)*(dark?.28:.14)).toFixed(3)+')'; ctx.beginPath();ctx.moveTo(a.x,a.y);ctx.lineTo(b.x,b.y);ctx.stroke(); } } if(mx>-1e3)for(var i=0;i