(function () {
  var COLORS = ['#11b3be','#ff6b9d','#ffd93d','#6bcb77','#4d96ff','#ff6b35','#c77dff','#ff9f43','#54a0ff','#ff6348'];

  var SVG_NS = 'http://www.w3.org/2000/svg';
  function makeBalloon(color, size) {
    var svg = document.createElementNS(SVG_NS, 'svg');
    svg.setAttribute('viewBox', '0 0 50 82');
    svg.setAttribute('width', size);
    svg.setAttribute('height', Math.round(size * 1.64));

    var body = document.createElementNS(SVG_NS, 'ellipse');
    body.setAttribute('cx', '25'); body.setAttribute('cy', '26');
    body.setAttribute('rx', '21'); body.setAttribute('ry', '25');
    body.setAttribute('fill', color); body.setAttribute('opacity', '0.88');

    // shine
    var shine = document.createElementNS(SVG_NS, 'ellipse');
    shine.setAttribute('cx', '18'); shine.setAttribute('cy', '16');
    shine.setAttribute('rx', '7'); shine.setAttribute('ry', '5');
    shine.setAttribute('fill', 'white'); shine.setAttribute('opacity', '0.25');
    shine.setAttribute('transform', 'rotate(-20 18 16)');

    var knot = document.createElementNS(SVG_NS, 'path');
    knot.setAttribute('d', 'M25 51 Q27.5 55.5 25 58.5 Q22.5 55.5 25 51Z');
    knot.setAttribute('fill', color); knot.setAttribute('opacity', '0.88');

    var str = document.createElementNS(SVG_NS, 'path');
    str.setAttribute('d', 'M25 58.5 Q20 68 25 80');
    str.setAttribute('stroke', '#999'); str.setAttribute('stroke-width', '1.2');
    str.setAttribute('fill', 'none'); str.setAttribute('opacity', '0.7');

    svg.appendChild(body);
    svg.appendChild(shine);
    svg.appendChild(knot);
    svg.appendChild(str);
    return svg;
  }

  var active = false;
  var tapCount = 0;
  var tapTimer = null;
  var lastTouch = 0;

  function registerTap(source, target) {
    if (active) { console.log('[🎈 easter egg] already active, ignoring'); return; }
    tapCount++;
    clearTimeout(tapTimer);
    tapTimer = setTimeout(function () {
      console.log('[🎈 easter egg] tap window expired, resetting count');
      tapCount = 0;
    }, 3000);
    console.log('[🎈 easter egg] tap ' + tapCount + '/5 via ' + source + ' on <' + (target.tagName || '?').toLowerCase() + '>');
    if (tapCount >= 5) {
      tapCount = 0;
      console.log('[🎈 easter egg] launching!');
      launch();
    }
  }

  // touchstart for mobile (fires immediately, not affected by scroll)
  document.addEventListener('touchstart', function (e) {
    if (e.target.closest('input, select, textarea')) {
      console.log('[🎈 easter egg] touchstart ignored — form element');
      return;
    }
    lastTouch = Date.now();
    registerTap('touch', e.target);
  }, { passive: true });

  // click for desktop (deduplicated from touch events)
  document.addEventListener('click', function (e) {
    if (Date.now() - lastTouch < 500) {
      console.log('[🎈 easter egg] click deduplicated (touch fired recently)');
      return;
    }
    if (e.target.closest('input, select, textarea')) {
      console.log('[🎈 easter egg] click ignored — form element');
      return;
    }
    registerTap('click', e.target);
  });

  function launch() {
    active = true;
    console.log('[🎈 easter egg] building container');

    var container = document.createElement('div');
    Object.assign(container.style, {
      position:      'fixed',
      inset:         '0',
      pointerEvents: 'none',
      zIndex:        '9',
      overflow:      'hidden',
    });
    document.body.insertBefore(container, document.body.firstChild);

    var count = 22;
    for (var i = 0; i < count; i++) {
      (function (idx) {
        var delay   = idx * 130 + Math.random() * 150;
        setTimeout(function () {
          var color   = COLORS[Math.floor(Math.random() * COLORS.length)];
          var size    = 38 + Math.random() * 32;
          var leftPct = 3 + Math.random() * 94;
          var sway    = Math.random() * 40 - 20;           // ±20 px
          var tilt    = Math.random() * 24 - 12;           // ±12 deg
          var dur     = 4500 + Math.random() * 3500;
          var rise    = window.innerHeight + size * 2;

          var wrap = document.createElement('div');
          Object.assign(wrap.style, {
            position: 'absolute',
            bottom:   (-size * 1.64 - 10) + 'px',
            left:     leftPct + '%',
          });
          wrap.appendChild(makeBalloon(color, size));
          container.appendChild(wrap);

          // Web Animations API — no CSS custom properties needed
          wrap.animate([
            { transform: 'translateX(0px)          translateY(0px)    rotate(' + tilt + 'deg)',    opacity: 0 },
            { transform: 'translateX(0px)          translateY(0px)    rotate(' + tilt + 'deg)',    opacity: 1,   offset: 0.06 },
            { transform: 'translateX(' + sway + 'px) translateY(' + (-rise * 0.5) + 'px) rotate(' + (-tilt * 0.3) + 'deg)', opacity: 1, offset: 0.5 },
            { transform: 'translateX(' + (-sway) + 'px) translateY(' + (-rise) + 'px) rotate(' + (-tilt * 0.6) + 'deg)', opacity: 0 },
          ], {
            duration: dur,
            easing:   'cubic-bezier(0.25, 0.46, 0.45, 0.94)',
            fill:     'forwards',
          });

          if (idx === 0) console.log('[🎈 easter egg] first balloon animated, rise=' + rise + 'px dur=' + dur + 'ms');
        }, delay);
      })(i);
    }

    setTimeout(function () {
      console.log('[🎈 easter egg] cleaning up');
      container.remove();
      active = false;
    }, 14000);
  }
})();