Lijst met detailpaneel Nieuw

<!-- Lijst met detailpaneel · NedDev · eigen werk. -->
<div class="jouw-container">
<div class="zpd">
  <div class="zpd__main">
    <div class="zpd__head"><h3 class="zpd__h">Te koop in Haarlem</h3><span class="zpd__n">8 woningen</span></div>
    <ul class="zpd__list" role="list"></ul>
  </div>
  <div class="zpd__scrim" hidden></div>
  <dialog class="zpd__panel" aria-labelledby="zpd-t">
    <div class="zpd__bar">
      <button type="button" class="zpd__ic" data-step="-1" aria-label="Vorige woning"><svg viewBox="0 0 24 24" aria-hidden="true"><path d="m14 6-6 6 6 6"/></svg></button>
      <button type="button" class="zpd__ic" data-step="1" aria-label="Volgende woning"><svg viewBox="0 0 24 24" aria-hidden="true"><path d="m10 6 6 6-6 6"/></svg></button>
      <span class="zpd__pos" aria-live="polite"></span>
      <button type="button" class="zpd__ic zpd__x" aria-label="Paneel sluiten"><svg viewBox="0 0 24 24" aria-hidden="true"><path d="M6 6l12 12M18 6 6 18"/></svg></button>
    </div>
    <div class="zpd__body">
      <h4 class="zpd__t" id="zpd-t" tabindex="-1"></h4>
      <p class="zpd__sub"></p>
      <p class="zpd__price"></p>
      <dl class="zpd__dl"></dl>
      <p class="zpd__desc"></p>
      <button type="button" class="zpd__cta">Bezichtiging aanvragen</button>
      <p class="zpd__ok" aria-live="polite"></p>
    </div>
  </dialog>
</div>
</div>

/* Lijst met detailpaneel · NedDev · eigen werk. */
.zpd{--ink:#0a0a0a;--pop:#F5480F;--pd:#b83a0b;--mut:#5b5b5b;--line:rgba(10,10,10,.12);position:absolute;inset:0;overflow:hidden;font-family:'Switzer',system-ui,sans-serif;font-size:12.5px;line-height:1.4;color:var(--ink);background:#f4f3f1;text-align:left}
.zpd *,.zpd *::before,.zpd *::after{box-sizing:border-box}
.zpd svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.zpd__main{height:100%;display:flex;flex-direction:column;padding:10px 12px 0}
.zpd__head{display:flex;align-items:baseline;justify-content:space-between;gap:10px;padding-bottom:6px}
.zpd__h{margin:0;font-size:14px;font-weight:600}
.zpd__n{font-size:11.5px;color:var(--mut)}
.zpd__list{flex:1;min-height:0;overflow:auto;list-style:none;margin:0;padding:0 0 10px;scrollbar-width:thin}
.zpd__row{display:flex;align-items:center;gap:10px;width:100%;padding:7px 8px;margin-bottom:3px;border:1px solid transparent;border-radius:4px;background:#fff;color:var(--ink);font:inherit;text-align:left;cursor:pointer;transition:border-color .15s}
.zpd__row:hover{border-color:var(--ink)}
.zpd__row[aria-current="true"]{border-color:var(--ink);background:#fff}
.zpd__ad{flex:1;min-width:0}
.zpd__ad b{display:block;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.zpd__ad span{display:block;font-size:11.5px;color:var(--mut)}
.zpd__pr{font-weight:600;font-variant-numeric:tabular-nums;white-space:nowrap;text-align:right}
.zpd__pr span{display:block;font-weight:500;font-size:11px;color:var(--mut)}
.zpd__pr span.is-bod{color:var(--pd)}
.zpd button:focus-visible{outline:2px solid var(--pop);outline-offset:2px}
.zpd__scrim{position:absolute;inset:0;background:rgba(10,10,10,.35);opacity:1;transition:opacity .2s}
.zpd__scrim[hidden]{display:none}
@starting-style{.zpd__scrim{opacity:0}}
.zpd__panel{position:absolute;inset:0 0 0 auto;margin:0;padding:0;width:min(290px,90%);height:100%;max-height:none;border:0;border-left:1px solid var(--ink);border-radius:0;background:#fff;color:var(--ink);display:none;flex-direction:column;translate:0 0;transition:translate .22s cubic-bezier(.2,.7,.2,1)}
.zpd__panel[open]{display:flex}
@starting-style{.zpd__panel[open]{translate:100% 0}}
.zpd__bar{display:flex;align-items:center;gap:4px;padding:8px 10px;border-bottom:1px solid var(--line)}
.zpd__ic{display:grid;place-items:center;width:28px;height:28px;border:1px solid var(--line);border-radius:4px;background:#fff;color:var(--ink);cursor:pointer;transition:border-color .15s}
.zpd__ic:hover:not(:disabled){border-color:var(--ink)}
.zpd__ic:disabled{opacity:.35;cursor:not-allowed}
.zpd__pos{margin-left:4px;font-size:11.5px;color:var(--mut);font-variant-numeric:tabular-nums}
.zpd__x{margin-left:auto;border-color:transparent}
.zpd__body{flex:1;min-height:0;overflow:auto;padding:10px 12px 12px;scrollbar-width:thin}
.zpd__t{margin:0;font-size:15px;font-weight:600;letter-spacing:-.01em}
.zpd__t:focus{outline:none}
.zpd__sub{margin:0;color:var(--mut)}
.zpd__price{margin:6px 0 8px;font-size:16px;font-weight:700;font-variant-numeric:tabular-nums}
.zpd__dl{display:grid;grid-template-columns:auto 1fr;gap:3px 10px;margin:0 0 8px;padding:8px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.zpd__dl dt{color:var(--mut)}
.zpd__dl dd{margin:0;font-weight:500;display:flex;align-items:center;gap:6px}
.zpd__lab{display:inline-block;width:18px;height:10px;clip-path:polygon(0 0,75% 0,100% 50%,75% 100%,0 100%)}
.zpd__desc{margin:0 0 10px;color:#333}
.zpd__cta{width:100%;height:34px;border:0;border-radius:4px;background:var(--ink);color:#fff;font:600 12.5px/1 'Switzer',system-ui,sans-serif;cursor:pointer;transition:background-color .15s}
.zpd__cta:hover{background:#2a2a2a}
.zpd__ok{margin:6px 0 0;font-size:12px}
.zpd__ok:empty{display:none}
@media (prefers-reduced-motion:reduce){.zpd__panel,.zpd__scrim,.zpd *{transition:none!important}}

// Lijst met detailpaneel · NedDev · eigen werk.
// root = het element waarin de HTML staat
function init(root){
const w = root.querySelector('.zpd'); if (!w) return;
    const main = w.querySelector('.zpd__main'), list = w.querySelector('.zpd__list'), panel = w.querySelector('.zpd__panel'), scrim = w.querySelector('.zpd__scrim');
    const eur = n => '€ ' + n.toLocaleString('nl-NL') + ' k.k.';
    const LABC = { A: '#1a7f3c', B: '#55a234', C: '#8a9a1a', D: '#b78a00', E: '#c8641a', F: '#c03a1a' };
    const H = [
      ['Kleverparkweg 41', '2023 CD', 'Kleverpark', 549000, 'Te koop', 112, 4, 1928, 'C', 'Jaren-dertigwoning met originele glas-in-lood en een tuin op het zuiden. Zolder is als vierde slaapkamer in gebruik.'],
      ['Zijlweg 188 rd', '2015 BN', 'Leidsebuurt', 425000, 'Onder bod', 78, 3, 1905, 'D', 'Benedenwoning met eigen voordeur en achtertuin van 11 meter. Tien minuten lopen naar station Haarlem.'],
      ['Spaarndamseweg 7', '2021 KA', 'Transvaalwijk', 389000, 'Te koop', 69, 3, 1930, 'C', 'Bovenwoning met dakterras en nieuwe keuken uit 2024. VvE is actief en gezond.'],
      ['Rijksstraatweg 302', '2025 DK', 'Haarlem-Noord', 675000, 'Te koop', 134, 5, 1964, 'B', 'Ruime hoekwoning met garage en vrij uitzicht aan de achterzijde. Zonnepanelen (12 stuks).'],
      ['Botermarkt 12', '2011 XL', 'Centrum', 495000, 'Verkocht o.v.', 74, 2, 1650, 'E', 'Monumentaal appartement boven een winkel aan de Botermarkt, met balkenplafond en schouw.'],
      ['Schoterweg 64', '2021 HJ', 'Indischewijk', 459000, 'Te koop', 96, 4, 1925, 'C', 'Tussenwoning met uitbouw en een bijkeuken. Basisschool en supermarkt om de hoek.'],
      ['Floraplein 3', '2012 HT', 'Rozenprieel', 579000, 'Te koop', 105, 4, 2008, 'A', 'Nieuwbouw uit 2008 met vloerverwarming, warmtepomp en parkeerplaats in de binnentuin.'],
      ['Generaal Cronjestraat 90', '2021 JN', 'Transvaalwijk', 349000, 'Onder bod', 58, 2, 1912, 'D', 'Compact appartement in de winkelstraat, met berging en ruim balkon op het westen.']
    ];
    list.innerHTML = H.map((h, i) => '<li><button type="button" class="zpd__row" data-i="' + i + '" aria-haspopup="dialog"><span class="zpd__ad"><b>' + h[0] + '</b><span>' + h[1] + ' Haarlem · ' + h[2] + '</span></span><span class="zpd__pr">' + eur(h[3]).replace(' k.k.', '') + '<span' + (h[4] !== 'Te koop' ? ' class="is-bod"' : '') + '>' + h[4] + '</span></span></button></li>').join('');
    let cur = -1, opener = null;
    function fill(i) {
      cur = i; const h = H[i];
      panel.querySelector('.zpd__t').textContent = h[0];
      panel.querySelector('.zpd__sub').textContent = h[1] + ' Haarlem, ' + h[2];
      panel.querySelector('.zpd__price').textContent = eur(h[3]);
      panel.querySelector('.zpd__dl').innerHTML = '<dt>Status</dt><dd>' + h[4] + '</dd><dt>Woonoppervlak</dt><dd>' + h[5] + ' m²</dd><dt>Kamers</dt><dd>' + h[6] + '</dd><dt>Bouwjaar</dt><dd>' + h[7] + '</dd><dt>Energielabel</dt><dd><span class="zpd__lab" style="background:' + LABC[h[8]] + '" aria-hidden="true"></span>' + h[8] + '</dd>';
      panel.querySelector('.zpd__desc').textContent = h[9];
      const cta = panel.querySelector('.zpd__cta'); cta.disabled = h[4] === 'Verkocht o.v.'; cta.textContent = cta.disabled ? 'Verkocht onder voorbehoud' : 'Bezichtiging aanvragen';
      panel.querySelector('.zpd__ok').textContent = '';
      panel.querySelector('.zpd__pos').textContent = (i + 1) + ' van ' + H.length;
      panel.querySelector('[data-step="-1"]').disabled = i === 0;
      panel.querySelector('[data-step="1"]').disabled = i === H.length - 1;
      list.querySelectorAll('.zpd__row').forEach(r => r.setAttribute('aria-current', String(+r.dataset.i === i)));
      panel.querySelector('.zpd__body').scrollTop = 0;
    }
    function open(i, from) {
      opener = from; fill(i);
      main.inert = true; scrim.hidden = false;
      if (panel.show) panel.show(); else panel.setAttribute('open', '');
      panel.querySelector('.zpd__t').focus();
    }
    function close() {
      if (!panel.hasAttribute('open')) return;
      if (panel.close) panel.close(); else panel.removeAttribute('open');
      main.inert = false; scrim.hidden = true;
      const r = list.querySelector('[data-i="' + cur + '"]'); if (r) { r.focus(); r.scrollIntoView({ block: 'nearest' }); }
    }
    function step(d) {
      const n = cur + d; if (n < 0 || n >= H.length) return;
      fill(n);
      const t = panel.querySelector('.zpd__t');
      if (panel.contains(document.activeElement) && document.activeElement.disabled) t.focus();
    }
    list.addEventListener('click', e => { const r = e.target.closest('.zpd__row'); if (r) open(+r.dataset.i, r); });
    panel.addEventListener('click', e => {
      const s = e.target.closest('[data-step]'); if (s) { step(+s.dataset.step); if (s.disabled) panel.querySelector('.zpd__t').focus(); return; }
      if (e.target.closest('.zpd__x')) { close(); return; }
      if (e.target.closest('.zpd__cta')) panel.querySelector('.zpd__ok').textContent = 'Aanvraag verstuurd. De makelaar belt je binnen 1 werkdag voor een moment.';
    });
    scrim.addEventListener('click', close);
    // Beginstand in de demo: paneel open op de eerste woning, zonder focus te stelen.
    fill(0); main.inert = true; scrim.hidden = false; panel.setAttribute('open', '');
    panel.addEventListener('cancel', e => { e.preventDefault(); close(); });
    panel.addEventListener('keydown', e => {
      if (e.key === 'Escape') { e.preventDefault(); close(); return; }
      if ((e.key === 'ArrowLeft' || e.key === 'ArrowRight') && !e.altKey) { e.preventDefault(); step(e.key === 'ArrowLeft' ? -1 : 1); return; }
      if (e.key === 'Tab') {
        const f = [...panel.querySelectorAll('button:not(:disabled),[tabindex="-1"]')].filter(x => x.offsetParent !== null && x.tagName === 'BUTTON');
        if (!f.length) return;
        const i = f.indexOf(document.activeElement);
        if (e.shiftKey && i <= 0) { e.preventDefault(); f[f.length - 1].focus(); }
        else if (!e.shiftKey && i === f.length - 1) { e.preventDefault(); f[0].focus(); }
      }
    });
}
init(document.querySelector('.jouw-container'));