(function () {
  'use strict';

  var root = document.documentElement;
  var reducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  var revealNodes = Array.prototype.slice.call(document.querySelectorAll('.btp580-reveal'));

  function showAll() {
    revealNodes.forEach(function (node) {
      node.classList.add('is-visible');
    });
  }

  if (reducedMotion || !('IntersectionObserver' in window)) {
    showAll();
  } else {
    var revealObserver = new IntersectionObserver(function (entries) {
      entries.forEach(function (entry) {
        if (!entry.isIntersecting) return;
        entry.target.classList.add('is-visible');
        revealObserver.unobserve(entry.target);
      });
    }, {
      rootMargin: '0px 0px -7% 0px',
      threshold: 0.08
    });

    document.querySelectorAll('.btp580-domain').forEach(function (node, index) {
      node.style.transitionDelay = String(index * 65) + 'ms';
    });

    revealNodes.forEach(function (node) {
      revealObserver.observe(node);
    });

    root.classList.add('btp580-ready');
  }

  var interfaceField = document.querySelector('[data-btp580-interface]');
  var precisePointer = window.matchMedia('(hover: hover) and (pointer: fine)').matches;

  if (interfaceField && precisePointer && !reducedMotion) {
    var frame = 0;
    var nextX = 0;
    var nextY = 0;

    function renderPointer() {
      frame = 0;
      interfaceField.style.setProperty('--btp580-shift-x', nextX.toFixed(2) + 'px');
      interfaceField.style.setProperty('--btp580-shift-y', nextY.toFixed(2) + 'px');
    }

    interfaceField.addEventListener('pointermove', function (event) {
      var rect = interfaceField.getBoundingClientRect();
      nextX = ((event.clientX - rect.left) / rect.width - 0.5) * -10;
      nextY = ((event.clientY - rect.top) / rect.height - 0.5) * -7;
      if (!frame) frame = window.requestAnimationFrame(renderPointer);
    }, { passive: true });

    interfaceField.addEventListener('pointerleave', function () {
      nextX = 0;
      nextY = 0;
      if (!frame) frame = window.requestAnimationFrame(renderPointer);
    }, { passive: true });
  }
}());