.custom-gallery { max-width:600px; margin:0 auto; }
.custom-main img { width:100%; max-height:500px; object-fit:contain; display:block; }
.custom-thumbs { position:relative; margin-top:10px; }
.thumb-track { display:flex; gap:8px; overflow:hidden; scroll-behavior:smooth; }
.thumb-track img { height:80px; cursor:pointer; border-radius:4px; object-fit:cover; }
.thumb-track img.active { outline:2px solid #333; }
.thumb-nav { position:absolute; top:25px; background:#fff; border:1px solid #ccc; border-radius:50%; width:32px; height:32px; cursor:pointer; z-index:10; display:flex; align-items:center; justify-content:center; }
.thumb-nav.prev { left:0; }
.thumb-nav.next { right:0; }