AI 제품 혼합 과금

<div class="invoice"><div class="head">AI SERVICE / INVOICE <b id="bill">$38</b></div><div class="row"><span>BASE SUBSCRIPTION</span><strong>$30</strong></div><div class="row"><span>USAGE: <b id="jobs">40</b> JOBS</span><strong id="usage">$8</strong></div><div class="sum"><i></i><em id="variable"></em></div><label>JOBS THIS MONTH <input id="tasks" type="range" min="0" max="200" step="10" value="40"></label></div>

.invoice{width:min(90%,520px);border:2px solid var(--fg);background:var(--surface);padding:clamp(10px,3vmin,19px);font:900 clamp(10px,max(2vmin,1vw),14px)/1.2 sans-serif}.head,.row{display:flex;justify-content:space-between;gap:5px}.head{padding-bottom:10px;border-bottom:2px dashed var(--line)}.head b{font-size:clamp(20px,6vmin,38px);color:var(--accent)}.row{margin-top:10px}.sum{display:flex;height:clamp(18px,5vmin,32px);margin:12px 0}.sum i{background:var(--fg);transition:.3s}.sum em{flex:1;background:var(--accent)}label{display:block;color:var(--muted)}input{display:block;width:100%;accent-color:var(--accent)}@media(min-width:700px){body>:first-child{transform:scale(1.25);transform-origin:center}}

const r=document.querySelector('#tasks');function draw(){const n=+r.value,v=n*.2;document.querySelector('#jobs').textContent=n;document.querySelector('#usage').textContent='$'+v.toFixed(0);document.querySelector('#bill').textContent='$'+(30+v).toFixed(0);document.querySelector('.sum i').style.width=(30/(30+v)*100)+'%'}r.oninput=draw;draw();setTimeout(()=>{r.value=150;draw()},650);setTimeout(()=>{r.value=40;draw()},2600);