:root {
      --primary:#2d2a26; --accent:#d4af37; --bg:#f5f2eb; --card:#fff;
      --text:#333; --soft-orange:#f4b251; --danger:#a33; --muted:#777;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    body{font-family:Georgia,serif;background:var(--bg);color:var(--text);min-height:100vh}
    a{color:var(--primary)}
    input,textarea,select{width:100%;padding:12px;border:1px solid #ddd;border-radius:8px;margin:0 0 14px;font-family:inherit;background:#fff;font-size:1rem}
    button{font-family:Arial,sans-serif;cursor:pointer}
    .hidden{display:none!important}

    #lock-screen{position:fixed;inset:0;background:var(--primary);display:flex;align-items:center;justify-content:center;z-index:10000;color:#fff;padding:20px}
    .lock-box{background:rgba(255,255,255,.1);padding:34px;border-radius:14px;text-align:center;max-width:420px;width:100%;border:1px solid rgba(255,255,255,.2)}
    .lock-box h1{margin-bottom:8px}
    .lock-box p{color:#ddd;margin-bottom:16px;font-size:.95rem}
    .lock-box button{padding:12px 20px;border:0;border-radius:30px;background:var(--soft-orange);color:var(--primary);font-weight:bold;width:100%}

    .site-header{background:var(--card);padding:16px 18px 20px;border-bottom:1px solid rgba(0,0,0,.06)}
    .header-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px;font-family:Arial,sans-serif;font-size:.9rem}
    .lab-badge{background:#fff3d6;color:#8a6d1a;padding:4px 10px;border-radius:999px;font-size:.75rem;font-weight:bold;text-transform:uppercase;letter-spacing:.04em}
    .site-header h1{font-size:1.75rem;color:var(--primary);margin-bottom:4px}
    .tagline{color:var(--muted);font-size:.95rem;margin-bottom:14px}
    .top-nav{display:flex;gap:8px;flex-wrap:nowrap;width:100%}
    .btn-nav{flex:1;min-width:0;min-height:44px;padding:10px 8px;border:0;border-radius:999px;background:#eee;color:var(--primary);font-weight:bold;font-size:.82rem;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;white-space:nowrap}
    .btn-nav:hover,.btn-nav:focus-visible{background:#e3ddd3;outline:2px solid var(--soft-orange);outline-offset:2px}
    .btn-add-photos{width:100%;min-height:48px;padding:14px 18px;border:0;border-radius:14px;background:var(--soft-orange);color:var(--primary);font-weight:bold;font-size:1rem;display:flex;align-items:center;justify-content:center;gap:8px}
    .btn-add-photos[aria-expanded="true"]{border-radius:14px 14px 0 0}
    .upload-target-label{font-family:Arial,sans-serif;font-size:.85rem;color:var(--muted);margin-bottom:12px}
    .upload-target-label strong{color:var(--primary)}

    #app-shell{max-width:1200px;margin:0 auto;padding:18px}
    .status{max-width:100%;margin-bottom:18px;padding:12px;border-radius:10px;background:#fff8df;border:1px solid #ead28c;font-family:Arial,sans-serif;font-size:.9rem}

    .panel{background:var(--card);border-radius:16px;padding:18px;margin-bottom:20px;box-shadow:0 4px 20px rgba(0,0,0,.03);border:1px dashed #ddd}
    .panel h2,.panel h3{color:var(--primary);margin-bottom:12px;font-size:1.05rem}
    .panel-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;background:transparent;border:0;padding:0;font:inherit;color:var(--primary);font-weight:bold}
    .panel-body{margin-top:14px}
    .btn-row{display:flex;flex-wrap:wrap;gap:10px}
    .btn{padding:11px 18px;border:0;border-radius:999px;font-weight:bold;font-size:.9rem}
    .btn-primary{background:var(--primary);color:#fff}
    .btn-gold{background:var(--soft-orange);color:var(--primary)}
    .btn-ghost{background:#eee;color:var(--primary)}
    .btn-danger{background:#f4dddd;color:var(--danger)}
    .btn:disabled{opacity:.55;cursor:not-allowed}
    .btn-icon{width:44px;height:44px;padding:0;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:1.4rem;line-height:1}

    .section-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:8px 0 16px;flex-wrap:wrap}
    .section-head h2{font-size:1.35rem;color:var(--primary)}
    .user-line{font-family:Arial,sans-serif;font-size:.85rem;color:var(--muted)}

    .album-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px}
    .album-card{background:var(--card);border:1px solid #eadecc;border-radius:14px;overflow:hidden;cursor:pointer;box-shadow:0 2px 10px rgba(0,0,0,.04);transition:transform .15s,box-shadow .15s;text-align:left;width:100%}
    .album-card:hover,.album-card:focus-visible{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,.08);outline:2px solid var(--soft-orange);outline-offset:2px}
    .album-cover{aspect-ratio:4/3;background:linear-gradient(135deg,#e8d5c4,#b8cfc0);position:relative}
    .album-cover img{width:100%;height:100%;object-fit:cover;display:block}
    .album-cover .empty-label{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.85);font-family:Arial,sans-serif;font-size:.85rem;background:rgba(0,0,0,.15)}
    .album-meta{padding:12px 14px 14px}
    .album-meta h3{font-size:1rem;color:var(--primary);margin-bottom:6px;line-height:1.25}
    .album-meta p{font-family:Arial,sans-serif;font-size:.78rem;color:var(--muted);line-height:1.4}

    .album-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}
    .album-toolbar h2{font-size:1.35rem;color:var(--primary)}
    .photo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:10px}
    .photo-thumb{position:relative;border:0;padding:0;border-radius:10px;overflow:hidden;background:#eee;aspect-ratio:1;cursor:pointer}
    .photo-thumb img{width:100%;height:100%;object-fit:cover;display:block}
    .photo-delete{position:absolute;top:6px;right:6px;width:30px;height:30px;border:0;border-radius:50%;background:rgba(0,0,0,.55);color:#fff;font-size:.95rem;line-height:1;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .15s}
    .photo-thumb:hover .photo-delete,.photo-thumb:focus-within .photo-delete{opacity:1}
    @media(max-width:768px){.photo-delete{opacity:1}}

    #lightbox{position:fixed;inset:0;background:rgba(0,0,0,.92);z-index:9000;display:flex;flex-direction:column;touch-action:pan-y}
    .lightbox-top{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;color:#fff;font-family:Arial,sans-serif;gap:10px}
    .lightbox-caption{flex:1;min-width:0}
    .lightbox-caption strong{display:block;font-size:1rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .lightbox-caption small{color:rgba(255,255,255,.75);font-size:.8rem}
    .lightbox-stage{flex:1;display:flex;align-items:center;justify-content:center;position:relative;min-height:0;padding:0 56px}
    .lightbox-stage img{max-width:100%;max-height:100%;object-fit:contain;user-select:none;-webkit-user-drag:none}
    .lightbox-nav{position:absolute;top:50%;transform:translateY(-50%);width:46px;height:46px;border:0;border-radius:50%;background:rgba(255,255,255,.15);color:#fff;font-size:1.6rem}
    .lightbox-nav.prev{left:8px}
    .lightbox-nav.next{right:8px}
    .lightbox-nav:disabled{opacity:.25;cursor:not-allowed}
    .lightbox-bottom{display:flex;align-items:center;justify-content:center;gap:12px;padding:14px;color:rgba(255,255,255,.8);font-family:Arial,sans-serif;font-size:.85rem}

    .modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:9500;display:flex;align-items:center;justify-content:center;padding:18px}
    .modal-panel{background:var(--card);border-radius:16px;padding:22px;max-width:420px;width:100%;box-shadow:0 20px 50px rgba(0,0,0,.2)}
    .modal-panel h3{color:var(--primary);margin-bottom:10px}
    .modal-panel p{font-family:Arial,sans-serif;font-size:.9rem;color:#555;margin-bottom:14px;line-height:1.45}
    .modal-actions{display:flex;gap:10px;justify-content:flex-end;flex-wrap:wrap;margin-top:8px}

    .empty-state{text-align:center;padding:36px 16px;color:var(--muted);font-family:Arial,sans-serif}
    .footer-note{margin-top:24px;text-align:center;font-family:Arial,sans-serif;font-size:.8rem;color:var(--muted)}

    @media(max-width:768px){
      #app-shell{padding:12px}
      .site-header h1{font-size:1.45rem}
      .top-nav{gap:6px}
      .btn-nav{font-size:.78rem;padding:10px 6px}
      .album-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px}
      .lightbox-stage{padding:0 44px}
      .lightbox-nav{width:40px;height:40px}
      .lightbox-top .btn-icon{width:40px;height:40px;font-size:1.2rem}
    }
  
#app-shell{max-width:1200px;margin:0 auto;padding:18px}
.site-header{background:#fff;padding:16px 18px 20px;border-bottom:1px solid rgba(0,0,0,.06);max-width:1200px;margin:0 auto}