// Erişilebilirlik widget'ı — Teknik Atölye Mersin (klimacimersin.com)
(function(){
  var css = [
    '#acc-btn{position:fixed;bottom:20px;left:20px;z-index:999999;width:52px;height:52px;border-radius:50%;background:#1a1a2e;color:#fff;border:2px solid #e67e22;font-size:24px;cursor:pointer;box-shadow:0 2px 14px rgba(0,0,0,.35);line-height:1}',
    '#acc-btn:hover{background:#e67e22}',
    '#acc-btn:focus-visible{outline:3px solid #e67e22;outline-offset:2px}',
    '#acc-panel{position:fixed;bottom:80px;left:20px;z-index:999999;background:#fff;border:1px solid #d0d7de;border-radius:10px;width:250px;padding:12px;display:none;box-shadow:0 8px 30px rgba(0,0,0,.3);font-family:system-ui,Arial,sans-serif;text-align:left}',
    '#acc-panel.open{display:block}',
    '#acc-panel .acc-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}',
    '#acc-panel .acc-head strong{font-size:15px;color:#1a1a2e}',
    '#acc-panel .acc-x{border:none;background:none;font-size:20px;cursor:pointer;color:#666;line-height:1;padding:0 4px}',
    '#acc-panel .acc-opt{display:block;width:100%;text-align:left;padding:9px 10px;margin:4px 0;border:1px solid #e2e8f0;border-radius:6px;background:#f8fafc;cursor:pointer;font-size:13px;color:#334155}',
    '#acc-panel .acc-opt:hover{background:#e8eef5}',
    '#acc-panel .acc-opt:focus-visible{outline:2px solid #e67e22}',
    'html.acc-hc body{background:#000 !important}',
    'html.acc-hc body *:not(#acc-btn):not(#acc-panel):not(#acc-panel *){color:#fff !important;background-color:#000 !important;border-color:#666 !important}',
    'html.acc-hc img,html.acc-hc svg,html.acc-hc video,html.acc-hc iframe{background-color:transparent !important}',
    'html.acc-hc a{color:#ffd54f !important;text-decoration:underline !important}',
    'html.acc-gs{filter:grayscale(100%) !important}',
    'html.acc-ul a{text-decoration:underline !important}'
  ].join('');
  var st = document.createElement('style');
  st.textContent = css;
  document.head.appendChild(st);

  var btn = document.createElement('button');
  btn.id = 'acc-btn';
  btn.setAttribute('aria-label', 'Erişilebilirlik seçeneklerini aç');
  btn.title = 'Erişilebilirlik';
  btn.textContent = '♿';

  var panel = document.createElement('div');
  panel.id = 'acc-panel';
  panel.setAttribute('role', 'dialog');
  panel.setAttribute('aria-label', 'Erişilebilirlik seçenekleri');
  panel.innerHTML =
    '<div class="acc-head"><strong>Erişilebilirlik</strong><button class="acc-x" aria-label="Kapat">×</button></div>'
    + '<button class="acc-opt" data-acc="font" data-v="1">A+ Yazıyı Büyüt</button>'
    + '<button class="acc-opt" data-acc="font" data-v="-1">A− Yazıyı Küçült</button>'
    + '<button class="acc-opt" data-acc="hc">◐ Yüksek Kontrast</button>'
    + '<button class="acc-opt" data-acc="gs">◑ Gri Tonlama</button>'
    + '<button class="acc-opt" data-acc="ul">🔗 Altı Çizili Bağlantılar</button>'
    + '<button class="acc-opt" data-acc="reset">↺ Tümünü Sıfırla</button>';

  document.body.appendChild(btn);
  document.body.appendChild(panel);

  var d = document.documentElement, LS = 'accPrefs';
  function save(){ try{ localStorage.setItem(LS, JSON.stringify({fs:d.style.fontSize, cls:d.className})); }catch(e){} }
  function font(n){ var f = parseFloat(getComputedStyle(d).fontSize)||16; d.style.fontSize = (f+n)+'px'; save(); }
  function toggle(c){ d.classList.toggle('acc-'+c); save(); }
  function reset(){
    d.style.fontSize = '';
    d.className = d.className.split(' ').filter(function(x){ return x.indexOf('acc-')!==0; }).join(' ').trim();
    try{ localStorage.removeItem(LS); }catch(e){}
  }
  function restore(){ try{ var p = JSON.parse(localStorage.getItem(LS)); if(p){ if(p.fs) d.style.fontSize=p.fs; if(p.cls) d.className=p.cls; } }catch(e){} }

  btn.onclick = function(){ panel.classList.toggle('open'); };
  panel.querySelector('.acc-x').onclick = function(){ panel.classList.remove('open'); };
  panel.querySelectorAll('.acc-opt').forEach(function(b){
    b.onclick = function(){
      var a = b.getAttribute('data-acc');
      if(a === 'font'){ font(parseInt(b.getAttribute('data-v'),10)); }
      else if(a === 'reset'){ reset(); }
      else { toggle(a); }
    };
  });
  restore();
})();