(function(){
var whtrU='in';
window.whtrSU=function(v){whtrU=v;document.getElementById('whtrUIn').className='whtrUB'+(v==='in'?' whtrUBOn':'');document.getElementById('whtrUCm').className='whtrUB'+(v==='cm'?' whtrUBOn':'');document.getElementById('whtrU1').textContent=v;document.getElementById('whtrU2').textContent=v;};
window.whtrCalc=function(){
  var w=parseFloat(document.getElementById('whtrIW').value);
  var h=parseFloat(document.getElementById('whtrIH').value);
  if(!w||!h||w<=0||h<=0){alert('Please enter both waist and height measurements.');return;}
  var ratio=w/h,rs=ratio.toFixed(2);
  var shape,desc,msg,act,badge,bc;
  var targetVal=(h*0.5).toFixed(1);
  var rule='Your waist should be less than half your height \u2014 under '+targetVal+' '+whtrU+' for you.';
  var target=targetVal+' '+whtrU;
  if(ratio<0.40){
    shape='Very Slim';
    desc='Waist very narrow relative to height \u2014 double check measurements';
    msg='Your waist is very narrow relative to your height. Please double check your measurements to make sure the tape is sitting correctly.';
    act='Ensure you are measuring correctly \u2014 tape sits flat, not tight. Measure twice and use the average for the most accurate result.';
    badge='\u26a0 Check Measurements';bc='whtrRY';
  } else if(ratio<0.50){
    shape='Balanced Proportion';
    desc='Waist well proportioned to height \u2014 excellent body balance';
    msg='Your waist is well proportioned to your height. This is the most balanced WHtR range \u2014 your waist is comfortably under half your height.';
    act='Your proportions are excellent. Maintain with 20 minutes of daily walking and simple stretching. Your natural balance is already well established.';
    badge='\u2713 Balanced';bc='whtrRG';
  } else if(ratio<0.60){
    shape='Needs Attention';
    desc='Waist approaching half of height \u2014 daily movement recommended';
    msg='Your waist is close to or at half your height. Consistent daily movement helps bring this ratio back into the balanced range over weeks.';
    act='Start with 20 to 30 minute daily walks. Simple morning waist rotations and staying active throughout the day create real change over time.';
    badge='\u26a0 Needs Attention';bc='whtrRY';
  } else {
    shape='Work on It';
    desc='Waist wider than half of height \u2014 consistent activity helps';
    msg='Your waist is wider than half your height. Consistent daily movement over weeks and months gradually improves this proportion.';
    act='Begin with 15 to 20 minute daily walks. Move every hour \u2014 avoid sitting continuously. Simple morning stretches make a real difference over months.';
    badge='\ud83d\udcaa Work on It';bc='whtrRR';
  }
  document.getElementById('whtrRNum').textContent=rs;
  document.getElementById('whtrRBadge').textContent=badge;
  document.getElementById('whtrRBadge').className='whtrRBadge '+bc;
  document.getElementById('whtrRShape').textContent=shape;
  document.getElementById('whtrRDesc').textContent=desc;
  document.getElementById('whtrRuleText').textContent=rule;
  document.getElementById('whtrTargetVal').textContent=target;
  document.getElementById('whtrPMsg').textContent=msg;
  document.getElementById('whtrActTxt').textContent=act;
  document.getElementById('whtrPh').style.display='none';
  document.getElementById('whtrRes').style.display='flex';
};
window.whtrRst=function(){
  document.getElementById('whtrIW').value='';
  document.getElementById('whtrIH').value='';
  document.getElementById('whtrPh').style.display='flex';
  document.getElementById('whtrRes').style.display='none';
};
})();