(function(){
  function animateAmount(el){
    var target = parseFloat(el.getAttribute('data-amt')); if (isNaN(target)) return;
    var txt = el.textContent.replace(/[^\d\.\-]/g,'');
    var start = parseFloat(txt); if (isNaN(start)) start = target;
    if (Math.abs(target - start) < 0.01) return;

    var dur = 900, t0 = performance.now();
    function step(t){
      var k = Math.min(1, (t - t0)/dur);
      // ease-out
      var v = start + (target - start) * (1 - Math.pow(1-k,3));
      el.textContent = (el.textContent.trim().charAt(0) === '£' ? '£' : '') + v.toLocaleString(undefined,{minimumFractionDigits:2, maximumFractionDigits:2});
      if (k < 1) requestAnimationFrame(step);
    }
    requestAnimationFrame(step);
  }
  function run(){
    document.querySelectorAll('.js-amt').forEach(animateAmount);
  }
  // initial + after ajax/partial loads
  document.addEventListener('DOMContentLoaded', run);
  // re-run periodically in case the page is long-lived and shortcodes refresh via cache ttl
  setInterval(run, 5000);
})();

(function(){
  // Easing (easeOutCubic)
  function ease(t){ return 1 - Math.pow(1 - t, 3); }

  // Format number with 2 dp + locale thousands
  function fmt(n){
    return n.toLocaleString(undefined, {minimumFractionDigits:2, maximumFractionDigits:2});
  }

  function parseCurrent(el){
    // current text may include currency; strip to get the numeric part
    var numTxt = (el.textContent || '').replace(/[^\d\.\-]/g,'');
    var n = parseFloat(numTxt);
    return isNaN(n) ? null : n;
  }

  function getTarget(el){
    var t = parseFloat(el.getAttribute('data-amt'));
    return isNaN(t) ? null : t;
  }

  function getCurrencyPrefix(el){
    // if first non-space char is a currency symbol, keep it
    var txt = el.textContent.trim();
    var first = txt.charAt(0);
    return /[£$€¥]/.test(first) ? first : '';
  }

  function animateAmount(el, target, opts){
    var prefix = getCurrencyPrefix(el);
    var start  = parseCurrent(el);
    if (start === null) start = target;
    if (Math.abs(target - start) < 0.005) { // tiny diff → snap
      el.textContent = (prefix?prefix:'') + fmt(target);
      el._amt = target;
      return;
    }

    var dur = (opts && opts.duration) || 900;
    var t0  = performance.now();
    function step(now){
      var k = Math.min(1, (now - t0)/dur);
      var v = start + (target - start) * ease(k);
      el.textContent = (prefix?prefix:'') + fmt(v);
      if (k < 1) {
        requestAnimationFrame(step);
      } else {
        el.textContent = (prefix?prefix:'') + fmt(target);
        el._amt = target;
      }
    }
    requestAnimationFrame(step);
  }

  function initOne(el){
    var target = getTarget(el);
    if (target === null) return;
    // first paint: ensure display matches target (no jump next time)
    if (typeof el._amt !== 'number') {
      var prefix = getCurrencyPrefix(el);
      el.textContent = (prefix?prefix:'') + fmt(target);
      el._amt = target;
    }
  }

  function tick(){
    document.querySelectorAll('.js-amt').forEach(function(el){
      var target = getTarget(el);
      if (target === null) return;
      if (typeof el._amt !== 'number') {
        initOne(el);
        return;
      }
      if (Math.abs(target - el._amt) >= 0.01) {
        animateAmount(el, target, {duration: 900});
      }
    });
  }

  // Run
  document.addEventListener('DOMContentLoaded', function(){
    document.querySelectorAll('.js-amt').forEach(initOne);
    tick();
    // Periodically re-check (in case markup is refreshed or TTL pulls new numbers)
    setInterval(tick, 4000);
  });

  // If you ever update data-amt dynamically, this will catch it instantly.
  var mo = new MutationObserver(function(muts){
    var changed = false;
    muts.forEach(function(m){
      if (m.type === 'attributes' && m.attributeName === 'data-amt') changed = true;
    });
    if (changed) tick();
  });
  document.addEventListener('DOMContentLoaded', function(){
    document.querySelectorAll('.js-amt').forEach(function(el){
      mo.observe(el, {attributes:true, attributeFilter:['data-amt']});
    });
  });
})();