var root = document.getElementById('portrait');
var mouse_monitor = function(e) {
let x = e.clientX/innerWidth;
let y = e.clientY/innerHeight;
let move_x = (x>0.5) ? '-30px' : '30px';
let move_y = (y>0.5) ? '-20px' : '20px';
root.style.setProperty("--translate-x", move_x);
root.style.setProperty("--translate-y", move_y);
}
root.addEventListener("mousemove", mouse_monitor);
