.gallery-section{text-align:center;background:linear-gradient(135deg,#f0f9ff,#e0f2fe);padding:60px 20px 80px}.gallery-title{margin-bottom:40px;font-size:42px;font-weight:900}.folder-row{flex-wrap:wrap;justify-content:center;gap:30px;display:flex}.folder-card{cursor:pointer;background:#fff;border-radius:16px;flex-direction:column;justify-content:space-between;width:220px;height:210px;padding:14px;display:flex;box-shadow:0 8px 20px #00000014}.folder-preview-grid{grid-template-columns:1fr 1fr;gap:6px;display:grid}.mini-preview{object-fit:cover;border-radius:6px;width:100%;height:60px}.folder-name{text-align:center;color:#fff;background:#2563eb;border-radius:8px;padding:6px;font-size:15px;font-weight:600}.thumb-grid{grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:15px;max-width:800px;margin:auto;display:grid}.thumb-image{object-fit:cover;cursor:pointer;border-radius:10px;width:100%;height:100px}.back-btn{color:#fff;cursor:pointer;background:#2563eb;border:none;border-radius:6px;margin-bottom:30px;padding:8px 18px}.popup-overlay{z-index:1000;background:#000000d9;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.popup-content{position:relative}.popup-image{border-radius:14px;width:550px;max-width:75vw;max-height:70vh}.nav-btn{cursor:pointer;background:#fff;border:none;border-radius:50%;padding:8px 12px;font-size:22px;position:absolute;top:50%;transform:translateY(-50%)}.left{left:-50px}.right{right:-50px}.close-btn{cursor:pointer;background:#fff;border:none;border-radius:50%;padding:4px 8px;position:absolute;top:-30px;right:0}