클릭당비용 (CPC)

<div class="board"><div class="top">BID <strong id="bid">$1.20</strong></div><input id="range" aria-label="Bid" type="range" min="60" max="200" value="120"><div class="dots" id="dots"></div><div class="foot"><span id="wins">4 CLICKS</span><div class="track"><i id="cost"></i></div><b id="spent">$4.80</b></div></div>

.board{width:min(88%,460px);padding:clamp(12px,3vmin,25px);background:var(--surface);border:2px solid var(--fg);font:800 clamp(10px,max(2vmin,1vw),16px)/1.1 sans-serif}.top,.foot{display:flex;align-items:center;justify-content:space-between;gap:8px}.top strong{color:var(--accent);font-size:clamp(18px,5vmin,38px)}input{width:100%;accent-color:var(--accent);margin:clamp(8px,2vmin,15px) 0}.dots{display:flex;justify-content:space-between;gap:4px;margin:clamp(8px,2vmin,18px) 0}.dots i{width:clamp(11px,4vmin,25px);aspect-ratio:1;border:2px solid var(--line);border-radius:50%;transition:.35s}.dots i.win{background:var(--accent);border-color:var(--accent);transform:scale(1.08)}.foot{color:var(--muted)}.foot b{color:var(--fg)}.track{flex:1;height:8px;background:var(--line)}.track i{display:block;height:100%;background:var(--accent);transition:.35s}

const range=document.querySelector('#range'),dots=document.querySelector('#dots');dots.innerHTML=Array.from({length:8},()=>'<i></i>').join('');const thresholds=[60,75,90,105,120,140,165,190];function draw(){const bid=Number(range.value),wins=thresholds.filter(x=>x<=bid).length;document.querySelector('#bid').textContent='$'+(bid/100).toFixed(2);document.querySelector('#wins').textContent=wins+' CLICKS';document.querySelector('#spent').textContent='$'+(wins*bid/100).toFixed(2);document.querySelector('#cost').style.width=(wins*bid/16)+'%';[...dots.children].forEach((d,i)=>d.classList.toggle('win',i<wins))}range.addEventListener('input',()=>{clearInterval(timer);draw()});let direction=20;const timer=setInterval(()=>{let n=Number(range.value)+direction;if(n>=190||n<=70)direction*=-1;range.value=String(n);draw()},650);draw();