:root{--bg:#0f1115;--surface:#171a21;--border:#262b36;--text:#e8eaed;--muted:#9aa4b2;--accent:#4f8cff;color-scheme:dark}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}a{color:inherit}.topbar{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;border-bottom:1px solid var(--border);position:-webkit-sticky;position:sticky;top:0;background:rgba(15,17,21,.85);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:10}.topbar h1{font-size:18px;margin:0}.container{max-width:1200px;margin:0 auto;padding:24px}.folder-title{font-size:15px;color:var(--muted);margin:28px 0 12px;font-weight:600;text-transform:uppercase;letter-spacing:.05em}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));grid-gap:10px;gap:10px}.tile{aspect-ratio:1/1;overflow:hidden;border-radius:10px;background:var(--surface);border:none;padding:0;cursor:pointer}.tile img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .2s ease}.tile:hover img{transform:scale(1.05)}.btn{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:10px 16px;font-size:14px;cursor:pointer}.btn.secondary{background:transparent;border:1px solid var(--border);color:var(--muted)}.login-wrap{min-height:100vh;display:grid;place-items:center;padding:24px}.login-card{width:100%;max-width:360px;background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:32px}.login-card h1{margin:0 0 4px;font-size:22px}.login-card p{margin:0 0 24px;color:var(--muted);font-size:14px}.field{display:block;margin-bottom:16px}.field span{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}.field input{width:100%;padding:11px 12px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:15px}.error{color:#ff6b6b;font-size:13px;margin:0 0 16px}.empty{color:var(--muted);text-align:center;padding:80px 24px}.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.92);display:grid;place-items:center;z-index:100;padding:24px}.lightbox img{max-width:100%;max-height:90vh;object-fit:contain;border-radius:8px}.lightbox .close{position:absolute;top:20px;right:24px;font-size:28px;background:none;border:none;color:#fff;cursor:pointer}