function calcWet(){var temp=parseFloat(document.getElementById("temp").value)||18;var thick=document.getElementById("thick").value;var tol=document.getElementById("tol").value;var min_temp=thick==="2"?22:thick==="3"?18:14;var adjust=tol==="low"?2:tol==="med"?0:-2;var effective=temp-adjust;var rec=effective>=min_temp+2?"Wetsuit recommended":effective>=min_temp?"Wetsuit optional":"Wetsuit mandatory";document.getElementById("r1").textContent=rec;document.getElementById("r2").textContent=min_temp+"-"+(min_temp+6)+"C";document.getElementById("desc").innerHTML="Water temp: "+temp+"C, "+thick+"mm wetsuit, "+tol+" tolerance
"+rec+"
FINA rules require wetsuit if water is below 18C for sanctioned events. Above "+(min_temp+6)+"C, wetsuit may cause overheating.";document.getElementById("results").style.display="block";}