デザインシステム .italia.

<div class="steppers">
  <div class="steppers-header">
    <ul>
      <li class="confirmed">Visit type <span class="visually-hidden">Completed</span></li>
      <li class="active" aria-current="step">Access note <span class="visually-hidden">Current step</span></li>
      <li>Review</li>
    </ul>
    <span class="steppers-index" aria-hidden="true">2/3</span>
  </div>
  <div class="steppers-content" aria-live="polite">
    <h2>Add an access note</h2>
    <label for="note">Access note (optional)</label>
    <textarea id="note" class="form-control" rows="3"></textarea>
  </div>
  <nav class="steppers-nav" aria-label="Plan steps">
    <button class="btn btn-outline-primary steppers-btn-prev">Back</button>
    <button class="btn btn-primary steppers-btn-next">Continue</button>
  </nav>
</div>

<!doctype html><html lang="en"><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>Prepare a library visit</title><link rel="stylesheet" href="vendor/bootstrap-italia-2.18.3/bootstrap-italia.min.css"><link rel="stylesheet" href="vendor/bootstrap-italia-2.18.3/fonts.css"><style>body{padding:32px 16px}main{max-width:900px;margin:auto}.steppers-content{padding:24px 0}.steppers-nav{display:flex;gap:16px;justify-content:space-between}.form-check{margin-bottom:16px}footer{font-size:14px;margin-top:32px;border-top:1px solid #ccc;padding-top:16px}[hidden]{display:none!important}.error{color:var(--bs-danger)}@media(max-width:575px){body{padding:24px 16px}}</style><main><p class="text-uppercase">Independent service example</p><h1>Prepare a library visit</h1><p class="lead">Choose a visit format, add a note and review your local plan.</p><div class="steppers"><div class="steppers-header"><ul id="steps"><li class="active" aria-current="step">Visit type <span class="visually-hidden">Current step</span></li><li>Access note</li><li>Review</li></ul><span class="steppers-index" id="index" aria-hidden="true">1/3</span></div><div class="steppers-content" aria-live="polite"><section data-step="0"><h2 tabindex="-1">Choose a visit type</h2><fieldset><legend class="visually-hidden">Visit type</legend><div class="form-check"><input id="guided" type="radio" name="visit" value="Guided introduction"><label for="guided">Guided introduction</label></div><div class="form-check"><input id="quiet" type="radio" name="visit" value="Quiet reading visit"><label for="quiet">Quiet reading visit</label></div></fieldset><p id="error" class="error" role="alert" hidden>Choose a visit type before continuing.</p></section><section data-step="1" hidden><h2 tabindex="-1">Add an access note</h2><p id="hint">Optional. Describe what would help you use the space; avoid sensitive personal information.</p><label for="note">Access note</label><textarea id="note" rows="3" class="form-control" aria-describedby="hint" maxlength="200"></textarea></section><section data-step="2" hidden><h2 tabindex="-1">Review your local plan</h2><dl><dt>Visit type</dt><dd id="review-type"></dd><dt>Access note</dt><dd id="review-note"></dd></dl><p>This is a local plan only. No booking or request has been sent.</p></section></div><nav class="steppers-nav" aria-label="Plan steps"><button id="back" class="btn btn-outline-primary steppers-btn-prev" disabled>Back</button><button id="next" class="btn btn-primary steppers-btn-next">Continue</button><button id="reset" class="btn btn-primary" hidden>Start again</button></nav></div><footer>Native Bootstrap Italia 2.18.3 CSS and Titillium Web. Original local planning flow; no municipal identity or booking service.</footer></main><script>let step=0;const labels=['Visit type','Access note','Review'];function render(){document.querySelectorAll('[data-step]').forEach(x=>x.hidden=Number(x.dataset.step)!==step);document.querySelectorAll('#steps li').forEach((li,i)=>{li.className=i===step?'active':i<step?'confirmed':'';li.removeAttribute('aria-current');li.textContent=labels[i];const state=document.createElement('span');state.className='visually-hidden';state.textContent=i===step?' Current step':i<step?' Completed':'';li.append(state);if(i===step)li.setAttribute('aria-current','step')});document.querySelector('#index').textContent=(step+1)+'/3';document.querySelector('#back').disabled=step===0;document.querySelector('#next').hidden=step===2;document.querySelector('#reset').hidden=step!==2;if(step===2){document.querySelector('#review-type').textContent=document.querySelector('[name=visit]:checked').value;document.querySelector('#review-note').textContent=document.querySelector('#note').value.trim()||'No note added'}document.querySelector('[data-step="'+step+'"] h2').focus()}document.querySelector('#next').onclick=()=>{if(step===0&&!document.querySelector('[name=visit]:checked')){document.querySelector('#error').hidden=false;document.querySelector('#guided').focus();return}document.querySelector('#error').hidden=true;step++;render()};document.querySelector('#back').onclick=()=>{step--;render()};document.querySelector('#reset').onclick=()=>{document.querySelectorAll('[name=visit]').forEach(x=>x.checked=false);document.querySelector('#note').value='';step=0;render()};</script></html>