thumbs.forEach(function(t,k){t.addEventListener('click',function(){show(k)})});
var gp=document.getElementById('gprev'),gnx=document.getElementById('gnext');
if(gp)gp.addEventListener('click',function(){show(i-1)});
if(gnx)gnx.addEventListener('click',function(){show(i+1)});

var lb=document.getElementById('lb'),im=document.getElementById('lbi'),cp=document.getElementById('lbc'),num=document.getElementById('lbn');
var set=PH,ci=0;
function paint(){var f=set[ci];im.src=f.src;im.alt=f.alt||'';cp.textContent=f.cap||'';num.textContent=(ci+1)+' / '+set.length;
  var one=set.length<2;
  document.getElementById('lbp').style.display=one?'none':'flex';
  document.getElementById('lbnx').style.display=one?'none':'flex';}
function open(arr,n){set=arr;ci=n;paint();lb.hidden=false;document.body.style.overflow='hidden'}
function close(){lb.hidden=true;im.removeAttribute('src');document.body.style.overflow=''}
function step(d){ci=(ci+d+set.length)%set.length;paint();if(set===PH)show(ci)}
document.getElementById('gopen').addEventListener('click',function(){open(PH,i)});
[].slice.call(document.querySelectorAll('[data-pl]')).forEach(function(b){
  b.addEventListener('click',function(){open(PL,Number(b.getAttribute('data-pl')))});
});
document.getElementById('lbx').addEventListener('click',close);
document.getElementById('lbp').addEventListener('click',function(){step(-1)});
document.getElementById('lbnx').addEventListener('click',function(){step(1)});
lb.addEventListener('click',function(e){if(e.target===lb)close()});
document.addEventListener('keydown',function(e){
  if(lb.hidden){ if(e.key==='ArrowLeft')show(i-1); if(e.key==='ArrowRight')show(i+1); return; }
  if(e.key==='Escape')close(); else if(e.key==='ArrowLeft')step(-1); else if(e.key==='ArrowRight')step(1);
});
var sx=null;
lb.addEventListener('touchstart',function(e){sx=e.touches[0].clientX},{passive:true});
lb.addEventListener('touchend',function(e){if(sx===null)return;var d=e.changedTouches[0].clientX-sx;if(Math.abs(d)>50)step(d>0?-1:1);sx=null},{passive:true});
})();
</script>
</body>
</html>